Larval populations. Medical search. Frequent questions

Larval dispersal is one of the most important topics in marine ecology, today. (wikipedia.org)
Larval dispersal and spatial distribution of reproducing females of Pandalus borealis in the Barents Sea were investigated. (nofima.com)
A passive larval dispersal model was run under four monsoonal regimes (Northeast monsoon, dry-transition, Southwest monsoon, and early Northeast monsoon), and the results subjected to the Infomap network detection algorithm. (frontiersin.org)
Could Larval Dispersal Explain Population Structure? (noaa.gov)
In this project, we wanted to quantify the relative connectivity, pathways and settlement locations of Yelloweye and Canary rockfish larval dispersal among basins in the Puget Sound region (Fig. 1). (noaa.gov)
To understand where significant sources of rockfish larvae are most likely to help increase explored larval dispersal patterns. (noaa.gov)
To test whether larval dispersal patterns explained the differences in population structure between the two species. (noaa.gov)
These results suggest larval dispersal may explain the lack of population structure observed in Canary Rockfish. (noaa.gov)
Understanding the potential larval dispersal pathways within and across management boundaries informs spatial management and recovery of important and protected species. (noaa.gov)
Winged adults have high dispersal and colonization rates allowing them to quickly establish populations in various growing media. (arbico-organics.com)

In the course of captive rearing to investigate the larval development of the species, I observed an unusual partial loss of pigmentation in two individuals from two widely separated locations. (bioone.org)
The life cycles of many marine species depend on a dispersive larval stage that connects spatially segregated populations. (frontiersin.org)
A long pelagic larval phase can help a species to break its parasite cycles. (wikipedia.org)
Consequently, these species have short pelagic larval durations and do not disperse long distances. (wikipedia.org)
We examined the hypothesis that the environmental processes governing larval supply were shared with wild benthic invertebrates with planktonic larval development and compared time series of larval abundance for the scallop with larval supply rates to benthic populations of two well-studied wild intertidal species: the Chthamalid barnacle Jehlius cirratus and the purple mussel Perumytilus purpuratus. (uai.cl)
Surprisingly, larval supply for none of the wild species showed a clear association to the EOFs. (uai.cl)
Benthic species connectivity in the marine environment relies on the degree of exchange of pelagic larval stages from habitats where adult populations spawn and subsequent recruitment in areas where the juveniles can survive to sexual maturity. (frontiersin.org)
These results also raised several questions about the connectivity of each population and how that might affect the management and recovery of these species. (noaa.gov)
We compared the mean PI size of live populations to that of historical populations preserved in surficial death assemblages for the species Ameritella versicolor in coastal Alabama. (confex.com)
In contrast, species with shorter planktonic larval durations (e.g. (confex.com)
Statistical analyses revealed significant reductions in PI size between historical and live populations for both species. (confex.com)
The newly-published document details gray wolf populations and conflict trends that indicate stable and predictable management of the species. (wyo.gov)
The adults of these species colonize the cowpea cultures at the end of the rainy season and the bruchid populations are carried into the stores where they continue to develop. (europa.eu)
For this aim, studies will be carried out in Africa and Europe in order to analyse : - the three species of cowpea bruchids and their populations in different zones of West Africa. (europa.eu)
Populations of four species of sea urchins, Lytechinus variegatus, Tripneustes ventricosus, Echinometra viridis and Echinometra lucunter, exist in overlapping distributions on the shallow insular shelf of southwest Puerto Rico. (ingentaconnect.com)
Reproductive state, larval occurrence and recruitment patterns were measured over a 2-year period for each species. (ingentaconnect.com)
The pattern of larval occurrence and recruitment for T. ventricosus exhibits the least concurrence of the species examined. (ingentaconnect.com)
This study reports the first evidence of population structure of fire corals in two common reef environments and illustrates the importance of water flow in driving population dynamic processes of these reef-building species. (plos.org)
A number of introduced tick species thrive in the vast grazing and browsing environments established during recent centuries of human and livestock population explosions. (merckvetmanual.com)
Students in a Population and Community Ecology class participate in coastal marine research focused on understanding factors determining population sizes and community interactions, particularly in the context of species that appear to be shifting their ranges with climate change. (carleton.edu)
1 Scrub typhus, caused by Orientia tsutsugamushi , is spread by larval (chigger) trombiculid mites from a limited range of species. (who.int)
But most of the infectious diseases that devastate human populations have their roots in wild species, and many pathogens are maintained silently by local wildlife communities before spillover to humans occurs. (cdc.gov)
Many insect species are undergoing rapid population decline in recent decades due to anthropogenic changes to natural landscapes and climate. (lu.se)
This has significance both for conservating species and for the future evolutionary potential of populations to adapt to rapidly changing environments. (lu.se)

Different two- and three-strain combinations increased larval survival rates by up to 86 percent. (thefishsite.com)

The size structure varied among reef habitats with higher proportions of larger colonies in calm nearshore reefs (fringing and patch reefs), while populations were dominated by smaller colonies in the exposed fore reefs. (plos.org)
Dubé CE, Mercière A, Vermeij MJA, Planes S (2017) Population structure of the hydrocoral Millepora platyphylla in habitats experiencing different flow regimes in Moorea, French Polynesia. (plos.org)
To reduce the risk of infected mosquitoes causing additional malaria cases, insecticide is sprayed to suppress the populations of adult mosquitoes and to control larval habitats. (cdc.gov)
population growth, rural-urban migration, the inadequacy of basic urban infrastructure (e.g. unreliable water supply, which may lead householders to collect and store water close to homes) and the huge increase in volume of solid waste resulting from the new habits of consumers, for example, discarded plastic containers and other abandoned items which provide larval habitats in urban areas. (who.int)

Perciformes) in southern Australia, largely due to difficulties in identifying the source populations of dispersing larvae. (frontiersin.org)
Then, the incremental structure and elemental composition of otoliths of larvae from the two regions were compared to determine if they had originated from a common source population. (frontiersin.org)
This study has demonstrated the ability of otolith chemistry to discriminate source populations of pelagic larvae in a fully marine environment, which provides a basis to quantify larval movement between fish populations. (frontiersin.org)
The elemental composition of microscopic otoliths of fish larvae were used as an environmental marker to differentiate between populations of larvae. (frontiersin.org)
The ability to discriminate between larvae that originated from different source populations provides a basis to quantify larval movement in marine ecosystems. (frontiersin.org)
Marine larval ecology is the study of the factors influencing dispersing larvae, which many marine invertebrates and fishes have. (wikipedia.org)
Though it has been generally disproved, the larval lottery hypothesis represents an important understanding of the difficulties faced by larvae during their time in the water column. (wikipedia.org)
Larval monitoring should begin about two weeks after peak trap catches, and continue until the number of larvae exceed economic thresholds and the crop is sprayed, or until the crop is swathed. (saskatchewan.ca)
These results suggest rockfish populations in several basins will be dependent on adults within the basin to supply larvae for future recovery. (noaa.gov)
secondary outbreaks are thought to result either from colonisation by immense numbers of larvae spawned by existing high-density outbreaking populations that are carried to reefs downstream by prevailing currents or from adult migration between reefs [ 8 ]. (hindawi.com)
The presence of many stages of nemertean larval development within a short time scale, in an area where developmental tends to be slow, suggests that reproduction occurs over an extended period and that the larvae have a long planktonic phase. (bas.ac.uk)
Although larval fish diversity was highest in the main channel, yellow perch and bluegill larvae only grew beyond the yolk stage at FI, where they preferentially selected copepods, while Daphnia were selected in the main channel. (usgs.gov)
Laboratory-reared larvae were used to verify identification and measure larval period. (ingentaconnect.com)
Larvae are thin, pale yellow and darken in the later larval stages. (arbico-organics.com)
Cre8trak documents the larvae population and maps the location of the traps. (origin.com.sg)

We hypothesized that bivalves with longer planktonic larval durations (e.g. (confex.com)

The field study showed that T. absoluta population progress is increasing during tomato phenologic cycle, the period of peak activities of T. absoluta compromise at vegetative time with flowering and early fruit setting stages of the crop. (omicsonline.org)
This disease is contracted only by persons who drink water contaminated by tiny copepods containing larval stages of the parasite Dracunculus medinensis. (cdc.gov)

Planktotrophic development is the most common type of larval development, especially among benthic invertebrates. (wikipedia.org)

New data on larval hatching, development and behaviour from laboratory experiments and field studies are presented. (nofima.com)
The biological model simulated the larval development of shrimp from hatching to zoea V, and their vertical migratory behaviour. (nofima.com)
the behaviour, the fecundity and the parasitization capacities of the egg and larval parasitoids under different climatic and biocenotic conditions. (europa.eu)

We evaluated the effectiveness of combined information, education and communication (IEC) campaigns using two potential poeciliid larvivorous fish guppy ( Poecilia reticulata ) and mosquitofish ( Gambusia affinis ), in indoor cement tanks for Aedes larval control. (biomedcentral.com)
Use of Poecilia fish combined with IEC offered the most effective means of controlling Aedes mosquito populations in our study. (biomedcentral.com)

This hypothesis views larval survival and successful recruitment as chance events, which numerous studies on larval behavior and ecology have since shown to be false. (wikipedia.org)
Once established, this behavior allows Rove Beetle populations to combat fluctuating pest infestations without reintroduction. (arbico-organics.com)

Female shrimp in the entire Barents Sea contributed to recruitment to the stock, which is considered to be one population. (nofima.com)
This change in abundance by orders of magnitude is termed a "primary outbreak" if it has not arisen through recruitment from other high-density populations nearby [ 8 ]. (hindawi.com)
The lack of an association between larval occurrence and recruitment (as interpreted from size-frequency patterns) that was seen for the Echinometra spp. (ingentaconnect.com)

For scleractinian corals, spatial differences in temperature, light, water flow and water quality conditions can influence their distribution and population dynamics [ 2 - 5 ]. (plos.org)

Our results showed that over the five-year study period (2009-2013), patterns of larval supply to the scallop population were related to inter-annual variability in the environmental processes as captured by their Empirical Orthogonal Functions (EOFs), likely to adult condition before spawning. (uai.cl)
Results suggest that larval supply patterns to Tongoy Bay may be modulated by regional patterns of climatic variability, particularly of tropical origin. (uai.cl)

For high pest populations, consider pairing with another suitable predator or parasite like S. scimitus , beneficial nematodes, or specific mite predators. (arbico-organics.com)
In phase 1, programmes are in control mode and are characterized by more than 5% parasite prevalence or API of five or more per 1000 population. (who.int)
Phase 2 encompasses pre-elimination programmes and is characterized by parasite prevalence of less than 5% in all ages, or API of 2 - 4 per 1000 population, with focalized and seasonal transmission. (who.int)

In conclusion, our results show that abiotic factors strongly influence the temporal pattern of reproductive activity and larval assemblages of both L. grossidens and P. platana in Peri Lagoon, Brazil. (scielo.br)

Increasing human populations and land use practices in the past century have enhanced the delivery of nutrients to coastal ecosystems, which has further exacerbated hypoxia. (confex.com)

The priority sites for management could serve as broodstock selection and juvenile restocking areas for aquaculture production clusters, which when properly implemented, could lead to an increase in sea cucumber production and contribute to natural populations. (frontiersin.org)

This report summarizes investigations of illnesses associated with exposures to insecticides used during 1999-2002 to control mosquito populations in nine states (Arizona, California, Florida, Louisiana, Michigan, New York, Oregon, Texas, and Washington) (estimated 2000 population: 118 million). (cdc.gov)

This study aims to monitor the population fluctuation and infestation rate of T. absoluta on tomato crop under glasshouse and open field conditions. (omicsonline.org)
larval infestation and reducing chikungunya. (biomedcentral.com)

While chemical pesticides can knock down flea beetle populations, there are few options for organic growers when controlling this pest. (sare.org)
Trap crops alone may reduce feeding damage on the main crop but fail to reduce pest populations without pesticide application. (sare.org)
Monitor pest population using fresh yellow sticky traps at weekly intervals. (arbico-organics.com)
Research from North Carolina State University shows that some insect pests are thriving in warm, urban environments and developing earlier, limiting the impact of parasitoid wasps that normally help keep those pest populations in check. (phys.org)
This, in turn, contributes to larger pest populations. (phys.org)
The overuse of insecticides to control vector insects such as Diaphorina citri Kuwayama in citrus groves has altered the population dynamics of pest mites. (bvsalud.org)

With only a one-time application, the probiotics also boosted larval growth, metamorphosis and settlement, meaning that in addition to more oysters surviving past the larval stage, they also fared better at transitioning to juveniles and anchoring to shells and other surfaces. (thefishsite.com)
In its larval stage, the insect feeds inside tree trunks and branches during the colder months. (michigan.gov)
In bivalve mollusks, egg size is correlated with the earliest stage of larval shell growth, (Prodissoconch I, PI). (confex.com)
Lampreys spend their larval stage within fine sand fluvial sediments, where they burrow and act as filter feeders. (mdpi.com)
Having located the gene behind the female colour variation, the researchers can now go further and identify different genotypes in the males, and in the aquatic larval stage of these insects. (lu.se)

The present study aimed at performing an ecotoxicological screening of 15 NADESs using an extensive set of marine and freshwater bioassays, based on different endpoints: immobilization of the crustacean Daphnia magna, growth inhibition of Raphidocelis subcapitata and of Phaeodactylum tricornutum, larval development alterations on the serpulid Ficopomatus enigmaticus and bioluminescence inhibition of Aliivibrio fischeri. (easychair.org)
The determination of some biological characteristics of these bruchids which could influence the populations of parasitoids is essential for development of the biological control methods. (europa.eu)
The L. variegatus population has a broad, loosely synchronous reproductive season with the least gonad development in the spring. (ingentaconnect.com)

Identifying the degree of larval exchange among populations is necessary to understand population dynamics and inform stock structure. (frontiersin.org)

We surveyed two main channel and two backwater areas in the lower Detroit River weekly from May to July 2007 to assess habitat use by larval fishes. (usgs.gov)

During the first EEC programme, a larval parasitoid Dinarmus basalis and an egg parasitoid Uscana lariophaga have shown to be promising candidates for biological control of the bruchids in Niger. (europa.eu)
the consequences of the insecticide treatments in the cowpea fields before harvesting on the bruchids and the parasitoid populations during storage. (europa.eu)

Growth and diet of larval yellow perch ( Perca flavescens ), bluegill ( Lepomis macrochirus ) and round goby ( Neogobius melanostomus ) were used to assess habitat quality. (usgs.gov)
Moreover, the two indicators for reduces fitness of resistant T. ni were slower larval growth and smaller pupal size. (bartleby.com)

Sixteen different larval and juvenile types were found representing seven phyla: Echinodermata, Nemertea, Coelenterata, Mollusca, Annelida, Arthropoda and Bryozoa, of which the first two were the most abundant. (bas.ac.uk)

California coastal populations show additional color variation, which is under investigation. (bioone.org)

Coastal shellfish aquaculture operations in Chile and Perú have experienced large interannual fluctuations in larval supply over the past decade, yet the drivers of such variability remain unidentified. (uai.cl)
Globally 634 million people, 10% of the world's population, live in coastal areas less than 10 meters above sea level. (carleton.edu)
According to 2010 census data, 123 million people, 39% of the United States population, live in coastal counties with an estimated increase to this number by 8% in the 2020 census. (carleton.edu)

Populations of COTS alternate periods of low density, when individuals are sparsely distributed across large areas of reef, with briefer periods of much higher densities [ 2 ]. (hindawi.com)
Outbreaks typically begin with an abrupt population increase from very low density. (hindawi.com)

2) Larval control using larvivorous guppy fish (Poecilia reticulata). (who.int)

The locations were ranked according to each metric and those with higher larval export rates, a higher diversity of larval sources and a high degree of successful larval contribution to other sites were deemed crucial for the management of wild populations. (frontiersin.org)

While the fire coral Millepora platyphylla is an important component of Indo-Pacific reefs, where it thrives in a wide range of environments, the ecological and biological processes driving its distribution and population structure are not well understood. (plos.org)

Epidemic outbreaks in the equine or pheasant population often precede human epidemics of WEE. (medscape.com)

The crown-of-thorns starfish (COTS) ( Acanthaster planci ) is an obligate corallivore that causes dramatic losses of coral cover at high population densities and is a major challenge in coral reef management [ 1 ]. (hindawi.com)

2017), to assess the effects of larval duration on live-dead disagreement. (confex.com)

Such movement determines whether a population is essentially a self-recruiting stock, or if it forms part of a larger meta-population where recruits originate from multiple sources. (frontiersin.org)
The larval count determines the effectiveness of the treatment. (origin.com.sg)

Restoration of shallow backwater areas is essential for rehabilitating fish populations and should be a priority in the Detroit River. (usgs.gov)
Cheyenne - Wyoming's gray wolf population continues to meet all management goals, according to the 2022 Wyoming Gray Wolf Monitoring and Management annual report by the Wyoming Game and Fish Department and partnering agencies. (wyo.gov)
Wyoming has a proven track record of successfully managing our gray wolf population, and we will continue that approach into the future," Game and Fish Director Brian Nesvik said. (wyo.gov)
The Wolf Management Plan has promoted a recovered, stable and appropriate population objective for Wyoming's wolves," said Dan Thompson, Game and Fish large carnivore section supervisor. (wyo.gov)
Game and Fish continues robust wolf monitoring efforts using radio collars to ensure rigorous data collection used for evaluating wolf population status and for proposing appropriate wolf management actions," said Ken Mills, Game and Fish lead wolf biologist. (wyo.gov)

Ground and aerial applications of insecticides are used to control populations of adult mosquitoes, which spread such diseases as West Nile virus-related illness, eastern equine encephalitis, and dengue fever. (cdc.gov)

The question of how and why genetic variation arises and is maintained over long periods of time is of key importance to evolutionary biology, population genetics and conservation biology. (lu.se)

Established population objectives for wolves are outlined in the Wyoming Gray Wolf Management Plan . (wyo.gov)
The 2022 annual wolf report will be instrumental in the USFWS's review of wolf management programs and population status for each state in the northern Rockies, which is expected to be concluded by February 2024. (wyo.gov)

O. tsutsugamushi , is maintained by transovarial transmission within the population of trombiculid mites. (who.int)

We focused on the effects of environmental variability on larval supply of the farmed Peruvian bay scallop Argopecten purpuratus in a bay in northern Chile (Tongoy Bay, 30 ∘ S) that accounts for over 90% of countrywide landings. (uai.cl)

Still, those results conflict with the differentiated population structure we observed in Yelloweye Rockfish between inside and outside the Puget Sound/Georgia Basin region. (noaa.gov)

Dispersal10

Species24

Increased larval survival1

Habitats4

Larvae15

Planktonic larval1

Stages2

Benthic1

Behaviour3

Aedes2

Behavior2

Recruitment3

Spatial1

Patterns2

Parasite3

Assemblages1

Human populations1

Natural Populations1

Mosquito populations1

Infestation2

Pest6

Stage5

Development3

Dynamics1

Fishes1

Parasitoid2

Growth2

Sixteen1

California1

Coastal3

Density2

Poecilia1

Diversity1

Processes1

Outbreaks1

Coral-reef1

Assess1

Determines2

Fish5

Control1

Conservation1

Management2

Mites1

Effects1

Conflict1