How the clear-sky angle of polarization pattern continues underneath clouds: full-sky measurements and implications for animal orientation. (1/1226)
One of the biologically most important parameters of the cloudy sky is the proportion P of the celestial polarization pattern available for use in animal navigation. We evaluated this parameter by measuring the polarization patterns of clear and cloudy skies using 180 degrees (full-sky) imaging polarimetry in the red (650 nm), green (550 nm) and blue (450 nm) ranges of the spectrum under clear and partly cloudy conditions. The resulting data were compared with the corresponding celestial polarization patterns calculated using the single-scattering Rayleigh model. We show convincingly that the pattern of the angle of polarization (e-vectors) in a clear sky continues underneath clouds if regions of the clouds and parts of the airspace between the clouds and the earth surface (being shady at the position of the observer) are directly lit by the sun. The scattering and polarization of direct sunlight on the cloud particles and in the air columns underneath the clouds result in the same e-vector pattern as that present in clear sky. This phenomenon can be exploited for animal navigation if the degree of polarization is higher than the perceptual threshold of the visual system, because the angle rather than the degree of polarization is the most important optical cue used in the polarization compass. Hence, the clouds reduce the extent of sky polarization pattern that is useful for animal orientation much less than has hitherto been assumed. We further demonstrate quantitatively that the shorter the wavelength, the greater the proportion of celestial polarization that can be used by animals under cloudy-sky conditions. As has already been suggested by others, this phenomenon may solve the ultraviolet paradox of polarization vision in insects such as hymenopterans and dipterans. The present study extends previous findings by using the technique of 180 degrees imaging polarimetry to measure and analyse celestial polarization patterns. (+info)Speeds and wingbeat frequencies of migrating birds compared with calculated benchmarks. (2/1226)
Sixteen species of birds passing Falsterbo in southwest Sweden during the autumn migration season were observed using short-range optical methods. Air speeds and wingbeat frequencies were measured, reduced to sea level, and compared with benchmark values computed by Flight.bas, a published flight performance program based on flight mechanics. The benchmark for air speed was the calculated sea-level value of the minimum power speed (V(mp)). The mean speeds of three raptor species that flew by flap-gliding were below V(mp), apparently because the flap-glide cycle involved slowing down below V(mp) when gliding and accelerating back up to V(mp) when flapping. The mean speeds of 11 species that flew by continuous flapping were between 0.82V(mp) and 1.27V(mp). Two passerine species that flew by bounding had mean speeds of 1.70V(mp) and 1.96V(mp), but these high mean speeds reflected their ability to fly faster against head winds. These results do not support predictions from optimal migration theory, which suggest that migrating birds 'should' fly faster, relative to V(mp). However, observations were restricted for technical reasons to birds flying below 200 m and may not represent birds that were seriously committed to long-distance migration. The benchmark wingbeat frequency (f(ref)) was derived from dimensional reasoning, not from statistical analysis of observations. Observed wingbeat frequencies ranged from 0.81f(ref) to 1.05f(ref), except in the two bounding species, whose wingbeat frequencies appeared anomalously high. However, the mechanics of bounding with a power fraction q imply that gravity during the flapping phase is increased by a factor 1/q, and when the value of gravity was so adjusted in the expression for f(ref), the wingbeat frequencies of the two bounding species were predicted correctly as a function of the power fraction. In small birds with more muscle power than is required to fly at speeds near V(mp), bounding is an effective method of adjusting the specific work in the muscle fibres, allowing conversion efficiency to be maximised over a wide range of speeds. (+info)Light-dependent magnetoreception in birds: the behaviour of European robins, Erithacus rubecula, under monochromatic light of various wavelengths and intensities. (3/1226)
To investigate how magnetoreception is affected by the wavelength and intensity of light, we tested European robins, Erithacus rubecula, under monochromatic lights of various wavelengths at two intensities using oriented behaviour as an indicator of whether the birds could derive directional information from the geomagnetic field. At a quantal flux of 7 x 10(15) quanta s(-1) m(-2), the birds were well oriented in their migratory direction east of North under 424 nm blue, 510 nm turquoise and 565 nm green light, whereas they were disoriented under 590 nm yellow light. Increasing the intensity of light at the same wavelengths more than sixfold to 43 x 10(15) quanta s(-1) m(-2) resulted in a change in behaviour: under bright blue and green light, the birds now showed a preference for the East-West axis, with the majority of headings at the western end; under bright turquoise light, they oriented unimodally towards a direction slightly west of North. Under bright yellow light, the birds continued to be disoriented. These findings suggest a rather complex relationship between the receptors involved in magnetoreception. Magnetoreception appears to follow rules that are different from those of vision, suggesting that light-dependent magnetoreception may involve receptors and neuronal pathways of its own. (+info)Effects of duration and time of food availability on photoperiodic responses in the migratory male blackheaded bunting (Emberiza melanocephala). (4/1226)
The effects of the duration and time of food availability on stimulation of the photoperiodic responses (fattening and gain in body mass, and growth and development of testes) were investigated in the migratory blackheaded bunting (Emberiza melanocephala). Two experiments were performed. Experiment I examined the effects of a reduction in the duration of food supply in buntings that were subjected to long day lengths (16h:8h L:D) and received food ad libitum (group I) or for restricted durations, coinciding with the end of the lights-on period, of 8h (group II) and 4h (group III). Buntings of group I gained in body mass, whereas there was a mixed response in group II (half the birds gained and half lost body mass), and all birds of group III lost body mass. There was no effect on testis growth in groups I and II, but testes grew more slowly in group III. Experiment 2 investigated the effects of both the duration and the time of food availability. Of five groups of birds, group I was exposed to an 8h:16h L:D photoperiod, and groups II-V were exposed to 16h:8h L:D. Whereas birds of groups I and II received food ad libitum, those of groups III-V were fed only for 5 h, at zt 0-5 (group III), zt 5.5-10.5 (group IV) or zt 11-16 (group V), where zt = zeitgeber time and zt 0 refers to the beginning of the lights-on period. Apart from duration, the timing of food availability also had an effect on photoperiodic stimulation under the 16h:8h L:D photoperiod. Birds that were fed ad libitum fattened and gained in body mass, whereas among restricted feeding groups, only birds in the group fed during the first 5 h (zt 0-5, group III) showed a significant increase in body mass (albeit considerably lower than in the ad libitum group). Birds fed during the middle 5h (zt 5.5-10.5, group IV) showed an intermediate response, and those fed during the last 5h (zt 11-16, group V) lost body mass. Testicular growth was suppressed in birds that were fed for 5 h in the evening, but not in those fed for the same period in the morning or in the middle of the long day. Taken together, these results show that the duration of food supply and/or the time of day at which food is available affect photoperiodic stimulation of fattening and gain in body mass as well as the growth and development of gonads in the blackheaded bunting. (+info)Complex bird clocks. (5/1226)
The circadian pacemaking system of birds comprises three major components: (i) the pineal gland, which rhythmically synthesizes and secretes melatonin; (ii) a hypothalamic region, possibly equivalent to the mammalian suprachiasmatic nuclei; and (iii) the retinae of the eyes. These components jointly interact, stabilize and amplify each other to produce a highly self-sustained circadian output. Their relative contribution to overt rhythmicity appears to differ between species and the system may change its properties even within an individual depending, for example, on its state in the annual cycle or its photic environment. Changes in pacemaker properties are partly mediated by changes in certain features of the pineal melatonin rhythm. It is proposed that this variability is functionally important, for instance, for enabling high-Arctic birds to retain synchronized circadian rhythms during the low-amplitude zeitgeber conditions in midsummer or for allowing birds to adjust quickly their circadian system to changing environmental conditions during migratory seasons. The pineal melatonin rhythm, apart from being involved in generating the avian pacemaking oscillation, is also capable of retaining day length information after isolation from the animal. Hence, it appears to participate in photoperiodic after-effects. Our results suggest that complex circadian clocks have evolved to help birds cope with complex environments. (+info)Juvenile hormone regulation of longevity in the migratory monarch butterfly. (6/1226)
Monarch butterflies (Danaus plexippus) of eastern North America are well known for their long-range migration to overwintering roosts in south-central Mexico. An essential feature of this migration involves the exceptional longevity of the migrant adults; individuals persist from August/September to March while their summer counterparts are likely to live less than two months as adults. Migrant adults persist during a state of reproductive diapause in which both male and female reproductive development is arrested as a consequence of suppressed synthesis of juvenile hormone. Here, we describe survival in monarch butterflies as a function of the migrant syndrome. We show that migrant adults are longer lived than summer adults when each are maintained under standard laboratory conditions, that the longevity of migrant adults is curtailed by treatment with juvenile hormone and that the longevity of summer adults is increased by 100% when juvenile hormone synthesis is prevented by surgical removal of its source, the corpora allatum. Thus, monarch butterfly persistence through a long winter season is ensured in part by reduced ageing that is under endocrine regulation, as well as by the unique environmental properties of their winter roost sites. Phenotypic plasticity for ageing is an integral component of the monarch butterflies' migration-diapause syndrome. (+info)Deriving dispersal distances from genetic data. (7/1226)
Dispersal is one of the most important factors determining the genetic structure of a population, but good data on dispersal distances are rare because it is difficult to observe a large sample of dispersal events. However, genetic data contain unbiased information about the average dispersal distances in species with a strong sex bias in their dispersal rates. By plotting the genetic similarity between members of the philopatric sex against some measure of the distance between them, the resulting regression line can be used for estimating how far dispersing individuals of the opposite sex have moved before settling. Dispersers showing low genetic similarity to members of the opposite sex will on average have originated from further away. Applying this method to a microsatellite dataset from lions (Panthera leo) shows that their average dispersal distance is 1.3 home ranges with a 95% confidence interval of 0.4-3.0 home ranges. These results are consistent with direct observations of dispersal from our study population and others. In this case, direct observations of dispersal distance were not detectably biased by a failure to detect long-range dispersal, which is thought to be a common problem in the estimation of dispersal distance. (+info)Unexpected coherence and conservation. (8/1226)
The effects of migration in a network of patch populations, or metapopulation, are extremely important for predicting the possibility of extinctions both at a local and a global scale. Migration between patches synchronizes local populations and bestows upon them identical dynamics (coherent or synchronous oscillations), a feature that is understood to enhance the risk of global extinctions. This is one of the central theoretical arguments in the literature associated with conservation ecology. Here, rather than restricting ourselves to the study of coherent oscillations, we examine other types of synchronization phenomena that we consider to be equally important. Intermittent and out-of-phase synchronization are but two examples that force us to reinterpret some classical results of the metapopulation theory. In addition, we discuss how asynchronous processes (for example, random timing of dispersal) can paradoxically generate metapopulation synchronization, another non-intuitive result that cannot easily be explained by the standard theory. (+info)
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Animal A Day!: May 2012
BirdsGreat Wildebeest MigrationRoutes2021Masai MaraSpeciesArcticWildebeestButterfliesSerengetiMigrateBehaviorPatternsInternational OrganizatAfricaHumansMammalsWorld's greatest2020EpicSearchWarblersClimate2018InsectUndertakenTravelsPhenomenonCorridorsSurviveGlobal migrationEarth's2016Proliferation2017RiversElephantsBehaviourScientistsMovementsBatsInstinctsHabitatsNature'sBird migrationJungleSeasonal movementAvianArduousUndergoExpansiveMovementEnvironmentTumorInduceHuman-animal conflictResearchers
Birds10
- Some migrating animals are insects, fish, and birds. (kidskonnect.com)
- See the fact file below for more information on the Migration - Animals, Insects and Birds or alternatively, you can download our 22-page Migration - Animals, Insects and Birds worksheet pack to utilise within the classroom or home environment. (kidskonnect.com)
- Radar allows documentation of the magnitude of animals on the move: On a recent night, for example, it was estimated that 5.4 million birds were in the skies over Oregon. (adventure-journal.com)
- Human constructions from power lines to wind turbines to oil pits increase the dangers of migration for birds. (adventure-journal.com)
- Once a year, certain species of mammals, birds, fishes, reptiles, and other animals throughout the world migrate because of a variety of reasons. (logicgoat.com)
- For example, bird migration is the regular seasonal travel undertaken by many breeds of birds. (themost10.com)
- This entry was posted in Life and tagged animals , birds , environment , migration . (thisdayandthat.net)
- Although birds are often the most evident of the migrants, animals as small as pinhead-sized spiders and as large as blue whales migrate by land, air or water. (desertusa.com)
- In the case of Illinois, seasonal shifts in terrestrial bird migration routes ensure that Illinois supports birds from the Eastern and Central flyways during annual migrations. (medscape.com)
- Due to a combination of harsh temperatures and food scarcity, certain animals including birds, monarch butterflies, and several whales will migrate to a region with a warmer climate. (animalspot.net)
Great Wildebeest Migration3
- Here, amidst the reserve's astounding year-round concentration of animals, including the seasonal Great Wildebeest Migration, guests can have an unsurpassed wildlife experience. (andbeyond.com)
- The former is more of sighting the rarest wildlife creatures in the dense forest while the latter is of exploring major attractions like sighting the big 5 in the Savannah grasslands or witnessing the great wildebeest migration on the venture. (wildtrails.in)
- The great wildebeest migration is indeed a view not to be missed if you have either Serengeti or Masai Mara in the itinerary, but if you choose the wrong month to visit, you may end up not finding any among the herd migration. (wildtrails.in)
Routes8
- But how herds or animals learn their routes is a major debate. (motherjones.com)
- River crossings can be challenging for some species, but they are a regular part of many large animals' migration routes. (pewtrusts.org)
- Reindeer are faced with the disappearance of their traditional migration routes. (pulseplanet.com)
- 2020. Geolocators reveal migration routes, stopover sites, and nonbreeding dispersion in a population of Cerulean Warblers. (bsu.edu)
- This map illustrates the variability in migration routes for Common Loons. (vtecostudies.org)
- PCBs enter the food chain by various routes, including migration into food from external sources, contamination of animal feeds, and accumulation in the fatty tissues of animals. (cdc.gov)
- The environmental goal: Preserve links through the Florida Wildlife Corridor, the green veins that run the length of the state and serve as migration routes for the Florida Panther and other animals. (floridawildlifecorridor.org)
- As the only global convention specializing in the conservation of migratory species, their habitats and migration routes, CMS complements and co-operates with a number of other international organizations, NGOs and partners in the media as well as in the corporate sector. (iassquad.in)
20211
- In January 2021 I had the opportunity to have another test of my theory that migratory animals (fledgling cuckoos) use an innate sense of direction to find their way to their destination. (animalnav.org)
Masai Mara2
- The herd animals in Africa, such as wildebeest and zebra, travel from the Serengeti in Tanzania to the Masai Mara in Kenya in search of food and water. (animalspot.net)
- The annual wildebeest migration is expected in the Masai Mara between July and early November. (eaexoticsafaris.com)
Species13
- Bradnee Chambers, Executive Secretary of the United Nations Environment Program Convention on the Conservation of Migratory Species of Wild Animals , contributed this article to LiveScience's Expert Voices: Op-Ed & Insights . (livescience.com)
- In some cases where a species has a fairly brief lifespan and reproduces quickly, such as some invertebrates, migration may not occur in every generation. (kidskonnect.com)
- How animals respond to variable weather conditions through movement will have interesting implications for species competition and predator-prey dynamics," says Peter Mahoney, who conducted this research while at the University of Washington. (mpg.de)
- Fish generally migrate because of diet or breeding needs, but for some species the reason for migration is still unknown. (themost10.com)
- Insect migration is the seasonal movement, especially those by species of dragonflies, beetles and butterflies. (themost10.com)
- Science writer Sonia Shah says climate change has impacted the the migration of thousands of species. (kalw.org)
- Not only do they contain extremely valuable lumber resources, they serve as important carbon sinks and provide habitat and safe refuge for many species of animals. (carleton.edu)
- Aquatic Illinois - In this unit, the ' Living in Water ' lesson, ' Aquatic Species Fact Cards,' ' Lead Shot Consequences: Environmental Issue Changes Legislation ' lesson and ' 'Migration Activation ' lesson are the most relevant to waterfowl. (illinois.gov)
- Getting a better handle on shifting plant life cycles and animal migration patterns will help researchers identify which species are least able to migrate or adapt to climate change-the ones most susceptible to extinction. (bioedonline.org)
- We might want to contribute to that migration of species. (bioedonline.org)
- Purchasing through these helps us further the A-Z Animals mission to educate about the world's species. (a-z-animals.com)
- However, a number of infections tree species, particularly eucalypts, has been speculatively in humans and animals with no travel to C. gattii- endem- linked to its dispersal ( 6,9-11 ), no evidence for this has ic areas were recently confirmed on the BC mainland and been found in BC. (cdc.gov)
- These include high altitude alpine and glacial lakes, tropical freshwater and saltwater lakes, and the wetlands of the Indus River and Arabian Sea Coast, comprising a unique biodiversity of important plant, bird and animal species. (koreatimes.co.kr)
Arctic14
- The author, Eric Cassell, joins host and Baylor computer engineering professor Robert J. Marks to discuss the groundbreaking book and, in particular, the chapters on some of the animal kingdom's most stunning navigators-the arctic tern, homing pigeons, the monarch butterfly, and the desert ant, among others. (idthefuture.com)
- In addition to broad effects like widespread drought in the West and melting permafrost in the Arctic, climate change can scramble the relationship between migration timing and the availability of food resources. (adventure-journal.com)
- Warmer winters, earlier springs, shrinking ice, and increased human development-the Arctic is undergoing dramatic changes that are impacting native animals. (mpg.de)
- Researchers from around the world have now established an archive for data documenting movements of animals in the Arctic and Subarctic, hosted on the Movebank platform at the Max Planck Institute of Animal Behavior in Radolfzell, Germany. (mpg.de)
- With the Arctic Animal Movement Archive, scientists can share their knowledge and collaborate to ask questions about how animals are responding to a changing Arctic. (mpg.de)
- Researchers have long been observing the movements and behaviour of animals in the Arctic. (mpg.de)
- To address this problem, an international team led by Sarah Davidson, data curator at the Max Planck Institute of Animal Behavior in Radolfzell, and Gil Bohrer, professor at the Ohio State University, have established a NASA-funded global data archive for studies of animal migration in the Arctic and Subarctic. (mpg.de)
- The aim of the Arctic Animal Movement Archive is to network scientists and promote their cooperation. (mpg.de)
- This should help to detect changes in the behaviour of animals and ultimately in the entire Arctic ecosystem. (mpg.de)
- The fish performed long-distance migrations and utilized Arctic areas from the eastern Barents Sea, to areas of Jan Mayen Island, and north to Svalbard. (biomedcentral.com)
- The Atlantic salmon displayed large individual variation in horizontal migrations, utilizing different ocean areas north of the Arctic Circle. (biomedcentral.com)
- The ultimate long-distance migrants, Arctic terns make an epic annual round trip of around 40,000 miles - the longest avian migration in the world. (exodustravels.com)
- [2] Short-tailed shearwaters perform an even longer "figure of eight" loop migration in the Pacific Ocean from Tasmania to as far north as the Arctic Ocean off northwest Alaska. (wikipedia.org)
- This review presents data on morbidity rates among people, domestic animals and wildlife in the Russian Arctic, focusing on the potential climate related emergence of such diseases as tick-borne encephalitis, tularemia, brucellosis, leptospirosis, rabies, and anthrax. (cdc.gov)
Wildebeest5
- This book explores the migratory patterns of animals like the wildebeest, the albatross, the Monarch butterfly, and the Atlantic salmon. (getepic.com)
- Whether it's wildebeest in search of greener pastures in east Africa or whales seeking out plankton blooms, these epic migrations are amongst the greatest wildlife spectacles you will ever encounter. (exodustravels.com)
- Every year, between May and December, over 1.5 million wildebeest, 300,000 zebra and a host of other antelope including Eland, impala and Thomson's gazelles, participate in the world's greatest wildlife migration. (aluxurytravelblog.com)
- Every year during the migration around 250,000 wildebeest and 30,000 zebra are killed off. (aluxurytravelblog.com)
- The herd isn't always together, though: although the migration is referred to as a "mass movement", the wildebeest do split up into splinter herds, with smaller packs going in search of their own food, while always circling the main, mega-herd. (aluxurytravelblog.com)
Butterflies1
- The long-distance migrations of seemingly fragile monarch butterflies are among nature's most incredible phenomena, with eastern populations wintering in vast numbers in a tiny refuge in Mexico, and western populations at a few sheltered spots along the California coast. (adventure-journal.com)
Serengeti10
- Second only to the Serengeti, the steppes of Kazakhstan are a migration hotspot where expansive ecosystems have remained largely intact into the present day. (livescience.com)
- More than one million wildebeests take part of the great migration through the Serengeti area. (aminus3.com)
- The Serengeti is best known for its annual animal migration. (latimes.com)
- I'd come to the Serengeti to see wild animals. (latimes.com)
- When you take these smaller, split herds into consideration, the whole migration can cover over half of the entire Serengeti. (aluxurytravelblog.com)
- Given the vast expanse of the Serengeti, and the fact that the migration can cover up to half of it, how do you know when, and where, you'll get the best view of the migration? (aluxurytravelblog.com)
- Tanzania has 2 camps as well, Serengeti Migration Camp and Kiba Point Camp. (sky-tours.com)
- The top 5 child-friendly luxury safaris are Loisaba Conservancy (Kenya), Londolozi Varty Camp (South Africa), Ants' Nest Camp (South Africa), Serengeti Migration Camp (Tanzania), and Kiba Point Camp (Tanzania). (sky-tours.com)
- This enormous reserve is actually part of the vast Serengeti plains famously known for its spectacular great wildebeest's migration and is home of the Big Five: Lion, Elephant, Leopard, Buffalo and Rhino. (eaexoticsafaris.com)
- Millions of animals migrate to the Mara from Serengeti in search for fresh green pastures and water. (eaexoticsafaris.com)
Migrate5
- Broadly speaking, there are three forms of insect migration: some insects immigrate for breeding on one-way journeys, others migrate from a breeding area to a feeding area, and others migrate from breeding areas to hibernation. (kidskonnect.com)
- During high flood season, the wild animals of the Kaziranga National Park have a natural tendency to migrate for shelter towards the Karbi Anglong Hills thereby crossing NH-37. (guwahatitimes.com)
- Manx shearwaters migrate over 10,000 km (6,200 mi) to South America in winter, using waters off southern Brazil and Argentina, so this bird had covered a minimum of 1,000,000 km (620,000 mi) on migration alone. (wikipedia.org)
- 1.Why do animals migrate in winter? (animalspot.net)
- Animals have a nature to migrate from place to place rather than stay at one place for longer durations. (kyari.in)
Behavior5
- Because migration behavior is labile, it contains information about the integrated organism's response to recent changes in the environment. (animalmigration.org)
- These properties make migration behavior an ideal metric for understanding organismal responses to changing environments over large spatial extents (e.g., climate change and land use change). (animalmigration.org)
- We've never had anywhere near that kind of global coverage to allow us to look at the behavior, distribution and abundance of these animals. (nasa.gov)
- This is because the migration is a behavior that has evolved primarily to avoid visual predators during the day when visual predators have their greatest advantage in clear ocean regions. (nasa.gov)
- Is the Subject Area "Animal sexual behavior" applicable to this article? (plos.org)
Patterns3
- Human activities are driving animals to change their activity patterns as a strategy for survival. (threatenedtaxa.org)
- With advances in technology, scientists have been able to track the migratory patterns of most animals. (animalspot.net)
- In scenarios where nomadic pastoralist lifestyles prevail, the situation is more complex, as one considers tribe-specific migration patterns: season, type of livestock, family versus clan movement, the role of children in animal herding, and the location of livestock markets all figure into the microplanning process as variables that can impact a team's ability to locate and vaccinate children. (cdc.gov)
International Organizat1
- Family members, friends and intimate partners are involved in the initial stage of human trafficking for a third of adult trafficking cases and around two-third of child trafficking cases says the International Organization for Migration (IOM) - a United Nations migration agency. (zamireports.com)
Africa6
- Outside the breeding months, Carmines are nomadic, flying between 300 and 750 miles around south-central Africa and South Africa , making it one of the greatest migrations in the avian world. (exodustravels.com)
- So he decided that the people in Africa belong in Africa, that people in America, they belong in America, etc., to such an extent that he decided that all of these different peoples on different continents didn't have a shared ancestry, a shared migration history, but were actually separate subspecies of humans. (kalw.org)
- The presence of the H5N1 virus in Africa is of great concern to human and animal health due to several factors requiring urgent action by Member States. (who.int)
- The first anatomically modern humans emerged around 100,000 years ago, as part of the second migration out of east africa. (studystack.com)
- The recent Ebola virus epidemic in West Africa is a stark reminder of the role animal reservoirs play in public health and reinforces the urgent need for a global One Health approach, as efforts by one sector alone cannot prevent or adequately address these complex problems at the human-animal-environment interface (2). (who.int)
- 2.Why does frequent migration take place in Africa? (animalspot.net)
Humans4
- The Tohono O'odham Native Americans of southern Arizona believe that everything in the desert - humans, animals and plants - must be treated with reverence. (pulseplanet.com)
- flowing along the western edge of the Corbett Tiger Reserve ( ctr ) in district Nainital of Uttar Pradesh, the river Kosi has seen many humans being killed by animals. (org.in)
- The ctr authorities have now started giving compensation for damages inflicted by animals to humans, cattle and crops in these villages. (org.in)
- Most BC C. gattii cases were among humans or animals out the year. (cdc.gov)
Mammals2
- Mammals are a clear example of a group of animals called nomadic migrants. (kidskonnect.com)
- Migration is central to the lives of many wild animals of great public interest and huge economic importance, from salmon to waterfowl to large mammals like pronghorn and elk. (adventure-journal.com)
World's greatest1
- Animal migration is one of the world's greatest natural phenomena - yet, those arduous journeys are being made even more difficult by human activities. (livescience.com)
20202
- 2020. Identifying bird-window collisions on a university campus during spring and fall migration. (bsu.edu)
- Oneiric" (2020) is a cinepoem that came out of some time I spent in Nebraska looking at migratory flight lines of Sandhill Cranes, one of the largest animal migrations. (permeablebarrier.com)
Epic1
- A beautifully illustrated picture book looking at the most incredible journeys undertaken by animals around the world, from the epic migration of the huge humpback whale to the unbelievable determination of the tiny hummingbird, each animal tells us the reason why they travel so very far. (koolskoolbookstore.com)
Search1
- Animals undergo migration in search of food, better habitats due to a change in the climate, or to find a mate. (animalspot.net)
Warblers2
- With an antibody not distinguishing between the two splice products, Cryptochrome 1 had been detected in the retinal ganglion cells of garden warblers during migration. (nih.gov)
- At Hempstead Lake State Park, usually a good early migration site, YELLOW-BREASTED CHAT was still around McDonald Pond today, and good numbers of PINE WARBLERS were also noted. (blogspot.com)
Climate7
- The reason for the migration may be local climate, availability of food or can be the season of the year. (themost10.com)
- This vast animal migration - the largest on the planet and a critical part of Earth's climate system - has been observed globally for the first time thanks to an unexpected use of a space-based laser. (nasa.gov)
- The researchers also observed long-term changes in populations of migrating animals, likely driven by climate variations. (nasa.gov)
- Scientists are adding animals that undergo DVM as a key element in climate models. (nasa.gov)
- Studying the effects of climate change on plant and animal populations can involve a slow and arduous process of gathering lots of data from the field. (bioedonline.org)
- The more sorts of data that you can use, the more you're going to know about how climate change is affecting different animals and plants. (bioedonline.org)
- Migration "triggers" may include changes in local climate, local availability of food, the season, or mating reasons. (jobsearchjungle.com)
20181
- Participants are randomised and assigned into three groups by two statistical experts from the Ministry of Inclusion, Social Security and Migrations, considering the uniform distribution of family type (one-parent / two-parent), years in social services (before 2018/ after 2018) and city zone habitat (north / south). (who.int)
Insect1
- Posted by Vaido (Võrumaa, Estonia ) on 30 March 2016 in Animal & Insect . (aminus3.com)
Undertaken1
- Migration is a mass movement undertaken by animals. (animalspot.net)
Travels1
- Migration does not only involve sky and land travels, it can happen beneath the deep oceans as well. (logicgoat.com)
Phenomenon4
- Although some reasons are to be placed upon temperature and seasons changes, the whole migration phenomenon has still left some experts questioning. (logicgoat.com)
- The study looks at a phenomenon known as Diel Vertical Migration (DVM), in which small sea creatures swim up from the deep ocean at night to feed on phytoplankton near the surface, then return to the depths just before sunrise. (nasa.gov)
- At this year's World Migratory Bird Day, visitors can join the Smithsonian's National Zoo in celebrating the phenomenon of migration and the animals that undertake this perilous journey. (si.edu)
- A notable feature of this phenomenon is that migration involves a return journey to the original location. (animalspot.net)
Corridors2
- Parks also serve as major corridors for animal migration. (carleton.edu)
- Such seasonal migrations are facilitated by these corridors. (kyari.in)
Survive2
- Find out what animals live in the desert and how they survive. (desertusa.com)
- Can animals survive in human modified forests? (threatenedtaxa.org)
Global migration3
- Phylogenetic analysis reveals the global migration of seasonal influenza A viruses. (cdc.gov)
- Bedford T , Cobey S , Beerli P , Pascual M . Global migration dynamics underlie evolution and persistence of human influenza A (H3N2). (cdc.gov)
- This photograph, by Andre D. Berro, MPH, Quarantine Public Health Officer, NCID, Division of Global Migration and Quarantine, Quarantine and Border Health Services Branch, earned Andre a First Place award in the 2008 CDC Connects Annual Public Health in Action Photo Contest, in the category of Domestic Programs. (cdc.gov)
Earth's2
- This animal-mediated carbon conveyor belt is recognized as an important mechanism in Earth's carbon cycle. (nasa.gov)
- The new satellite data give us an opportunity to combine satellite observations with the models and do a better job quantifying the impact of this enormous animal migration on Earth's carbon cycle. (nasa.gov)
20162
- Yet when researchers at Germany's Max Plank Institute for Ornithology tracked the bird's path using a GPS logger in 2016, they found that he and a few others had skipped the gruelling migration across the Sahara Desert. (thisdayandthat.net)
- In 2016, researchers documented this animal making the longest known land-based migration in the lower 48 states, traveling more than 240 miles from the low elevation winter range of Wyoming's Red Desert to the mountain slopes of northeast Idaho. (pewtrusts.org)
Proliferation2
- Several preclinical studies (in cells and in animal models) have shown that this pathway can induce proliferation, invasion, and migration of tumor cells, which can then lead to the development of tumor in distant sites throughout the body (such as the brain, liver, bones, and adrenal glands)," Dr. Gomez explained to Medscape Medical News . (medscape.com)
- We show that chronic exposure (4 months) to single- and multiwalled CNTs induced proliferation, migration, and invasion of the cells similar to that observed in asbestos -exposed cells. (cdc.gov)
20171
- During the study period (2008 to 2017), CALIPSO data revealed an increase in migrating animal biomass in the subtropical waters of the North and South Pacific, North Atlantic and South Indian oceans. (nasa.gov)
Rivers4
- How Much Do You Know About Wildlife Migration and Free-Flowing Rivers? (pewtrusts.org)
- You missed a few, but we hope you learned something about wildlife migration and free-flowing rivers! (pewtrusts.org)
- Pretty good-you're on your way to becoming a wildlife migration and free-flowing rivers expert! (pewtrusts.org)
- Congratulations, you're an expert on wildlife migration and free-flowing rivers! (pewtrusts.org)
Elephants1
- The elephants of Mali make the longest known elephant migration, advancing 300 miles (482 kilometers) through the arid Sahel during their annual circuit. (nationalgeographic.com)
Behaviour2
- We studied the detailed migration behaviour of six post-spawned adult Atlantic salmon from a North Norwegian river, during the entire ocean migration, by using high-resolution light-based geolocation archival tags. (biomedcentral.com)
- During the past few decades, advances in animal biotelemetry have promoted new insights into the behaviour of aquatic organisms by enabling researchers to track the movement of free-ranging individuals using a variety of electronic tags [ 4 ]. (biomedcentral.com)
Scientists2
- Scientists recognize this natural daily movement around the world as the largest migration of animals on Earth in terms of total number. (nasa.gov)
- And scientists have tracked this migration for the first time ever in recent years. (discovermagazine.com)
Movements3
- Knowledge of the complete horizontal migration and vertical movements of Atlantic salmon ( Salmo salar L.) during the marine phase is important for understanding the link between individual processes and population recruitment. (biomedcentral.com)
- This is the first study of Atlantic salmon to present detailed information about individuals' continuous horizontal migration and simultaneous vertical movements during the entire ocean migration, thus providing novel information on how habitat use change throughout the ocean residency. (biomedcentral.com)
- Periodic movements of animals in response to seasonal changes or reproductive instinct. (bvsalud.org)
Bats1
- We don't know much about where they eat, those kinds of simple questions which you'd be surprised, everybody thinks we know a lot about all the wildlife and there's quite a few animals, especially the bats, that we know very little about. (cavebiota.com)
Instincts2
- Today's ID the Future brings listeners the first half of a recent live webinar featuring author Eric Cassell fielding questions about his intelligent design book, Animal Algorithms: Evolution and the Mysterious Origin of Ingenious Instincts. (idthefuture.com)
- Today's ID the Future spotlights the new book Animal Algorithms: Evolution and the Mysterious Origin of Ingenious Instincts. (idthefuture.com)
Habitats1
- As an environmental treaty under the aegis of the United Nations Environment Programme, CMS provides a global platform for the conservation and sustainable use of migratory animals and their habitats. (iassquad.in)
Nature's1
- These photos are stunning proofs of nature's beauty in the form of migration! (logicgoat.com)
Bird migration1
- Bird migration has been implicated in the movement of a variety of pathogens. (medscape.com)
Jungle1
- Conrad tells Heston about strange happenings in the jungle, animal migrations, and when Heston asks him what he thinks is causing them, Conrad says the dreaded word, 'MARABUNDA'--the massive movement of a huge swarm of soldier ants, twenty miles long, two miles wide, traveling six miles a day, devouring everything in its path! (homestead.com)
Seasonal movement1
- Migration is a seasonal movement of a complete animal population from one location to another. (kidskonnect.com)
Avian1
- [ 1 ] In particular, characterization of the relationship between avian influenza virus movement and waterfowl migration has supported surveillance and early warning programs. (medscape.com)
Arduous1
- Follow the sharks' annual migration, and arduous quest to find a mate. (tvfinternational.com)
Undergo2
- Animals that undergo DVM come up to the surface to feed on phytoplankton near the ocean's surface and then swim back down, taking the phytoplankton carbon with them. (nasa.gov)
- In murkier and more nutrient-rich regions, the abundance of animals that undergo DMV is higher, but they represent a smaller fraction of the total animal population because visual predators are at a disadvantage. (nasa.gov)
Expansive1
- Both camps have a diverse and expansive number of animals and host many exciting games. (sky-tours.com)
Movement7
- Migration is a movement to and from a particular region of all or part of an animal population. (kidskonnect.com)
- The archive currently contains over 200 projects with the movement data of more than 8,000 marine and terrestrial animals from 1991 to the present. (mpg.de)
- Because tracking animal movement is central to answering so many questions in animal biology, the past century has seen constant innovation in tracking methods. (animalmigration.org)
- The migration-stimulated caveolin rear translocation appears to play an important role in endothelial cell polarization and directional movement. (cdc.gov)
- Keep these in mind as we discuss specific animal movement. (shmoop.com)
- Earthquakes and the movement of animals have also been known to cause avalanches. (wonderopolis.org)
- These channels also appear to play a role in the movement (migration) of certain neurons in the brain. (medlineplus.gov)
Environment4
- Concern about these chemicals continues because of their persistence in the environment and accumulation in wildlife and the animal food chain. (cdc.gov)
- Human health is intrinsically linked to the health of animals and to the environment, and efforts by just one sector alone cannot prevent or adequately address the complex problems at the human-animal-environment interface. (who.int)
- Additionally, using intersectoral approaches for risk assessment and risk mitigation for health issues at the human-animal-environment interface can improve efficiency and result in more successful outcomes. (who.int)
- The One Health approach, according to the Tripartite Zoonoses Guide, means that all relevant sectors and disciplines across the human-animal-environment interface are involved in addressing health in a coordinated way that is more effective, efficient or sustainable than might be achieved if not all relevant sectors were engaged (4). (who.int)
Tumor2
- Angiogenic growth factor-induced endothelial cell migration is a key step towards tumor angiogenesis. (cdc.gov)
- Norepinephrine has been shown to directly stimulate tumor cell migrations, and this effect is mediated by beta-adrenergic receptors," they add. (medscape.com)
Induce1
- Recent studies have shown that carbon nanotubes (CNTs) are biopersistent and induce mesothelioma in animals, but the underlying mechanisms are not known. (cdc.gov)
Human-animal conflict3
- To reduce human-animal conflict, a 14-km-long wall will be built along the southern border of Corbett Tiger Reserve. (org.in)
- But whenever the question of human-animal conflict arises, the blame invariably falls on these villages. (org.in)
- Chandrapura, Maharashtra has a huge problem of Human-Animal Conflict where thousands of crop-raiding cases are getting reported annually. (kyari.in)
Researchers5
- In addition to the hundreds of studies already included in the archive, the resource is continually growing, as data are transmitted from animals in the field and as more researchers join. (mpg.de)
- Even though the animals only spent a brief time near the rigs, the researchers found, the disruption had an enormous effect on their crucial spring transit-one that the researchers expect to translate into less fat, fewer babies, and higher mortality. (motherjones.com)
- Researchers used the space-based CALIPSO lidar to measure the planet's largest animal migration, which takes place when small sea creatures swim up from the depths at night to feed on phytoplankton, then back down again just before sunrise. (nasa.gov)
- Researchers observed this vertical migration pattern using the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite - a joint venture between NASA and the French space agency, Centre National d'Etudes Spatiales - that launched in 2006. (nasa.gov)
- Zeroing in on tropical and subtropical ocean regions, researchers found that while there are fewer vertically migrating animals in lower-nutrient and clearer waters, they comprise a greater fraction of the total animal population in these regions. (nasa.gov)