TY - JOUR. T1 - The normal genital tract of the female California sea lion (Zalophus californianus). T2 - Cyclic changes in histomorphology and hormone receptor distribution. AU - Colegrove, Kathleen M.. AU - Gulland, Frances M D. AU - Naydan, Diane K.. AU - Lowenstine, Linda J. PY - 2009/11. Y1 - 2009/11. N2 - Changes in reproductive tract histomorphology, and estrogen (ERα) and progesterone receptor (PR) expression throughout the breeding cycle were evaluated in free-ranging stranded female California sea lions (Zalophus californianus). Hormone receptor expression in the ovaries, uterus, cervix, and vagina was evaluated using an immunohistochemical technique with monoclonal antibodies. During a large portion of the cycle, ovaries contained both a corpora lutea (CL) and follicles in varying stages of development. In the periods of pupping and estrus during June and July, and in the spring morphologic features of the endometrium suggested estrogen influence. There were areas of squamous ...
1. The decline of Steller sea lions Eumetopias jubatus in the Gulf of Alaska and Aleutian Islands between the late 1970s and 1990s may have been related to reduced availability of suitable prey. Many studies have shown that pinnipeds and other mammals suffering from nutritional stress typically exhibit reduced body size, reduced productivity, high mortality of pups and juveniles, altered blood chemistry and specific behavioural modifications.. 2. Morphometric measurements of Steller sea lions through the 1970s and 1980s in Alaska indicate reduced body size. Reduced numbers of pups born and an apparent increase in juvenile mortality rates also appear to be nutritionally based. Blood chemistry analyses have further shown that Steller sea lions in the Gulf of Alaska and Aleutian Islands area exhibited signs of an acute phase reaction, or immune reaction, in response to unidentified physical and/or environmental stress. Behavioural studies during the 1990s have not noted any changes that are ...
California Sea Lion Photos, Zalophus californianus Photos, California Sea Lion Pictures and Photographs by Professional Natural History Photographer Phillip Colla / Oceanlight.com
The Steller sea lion (Eumetopias jubatus Schreber 1776) is the largest member of the family otariidae (Order Carnivora, Suborder Caniformia). Steller sea lions exhibit significant sexual dimorphism. Adult females average 2.1-2.4 m in length and weigh 200-300 kg. Adult males are noticeably larger, attaining a length of 2.7-3.1 m and weighing 400-800 kg. Pups are born from late May to early July and weigh 16-23 kg at birth.
California sea lions (Zalophus californianus) are abundant human-sized carnivores with large gyrencephalic brains. They develop epilepsy after experiencing status epilepticus when naturally exposed to domoic acid. We tested whether sea lions previously exposed to DA (chronic DA sea lions) display hippocampal neuropathology similar to that of human patients with temporal lobe epilepsy. Hippocampi were obtained from control and chronic DA sea lions. Stereology was used to estimate numbers of Nissl-stained neurons per hippocampus in the granule cell layer, hilus, and pyramidal cell layer of CA3, CA2, and CA1 subfields. Adjacent sections were processed for somatostatin immunoreactivity or Timm-stained, and the extent of mossy fiber sprouting was measured stereologically. Chronic DA sea lions displayed hippocampal neuron loss in patterns and extents similar but not identical to those reported previously for human patients with temporal lobe epilepsy. Similar to human patients, hippocampal sclerosis ...
steller sea lion biology facts. All about steller sea lions from the North Pacific Universities Marine Mammal Research Consortium.
Historically Steller Sea Lion populations were threatened by hunting for their meat, fur, and oil. They were killed by bounty hunters for eating fish and were killed to limit their predation on fish in aquaculture facilities. However, Steller Sea Lions-just like all marine mammals in the United States-are now protected by the Marine Mammal Protection Act (MMPA) which was passed in 1972. The MMPA prohibits, with certain exceptions, the take of marine mammals in U.S. waters and by U.S. citizens on the high seas, and the importation of marine mammal and marine mammal products into the U.S. Today they are threatened by boat strikes, pollutants, illegal hunting, offshore oil exploration, entanglements, habitat degradation and competition with fisheries for food resources. Did you know? Steller sea lions were named after Georg Steller, the German naturalist who first described them in the 1740s.. ...
Milk and energy intakes of suckling California sea lion (Zalophus californianus) pups in relation to sex, growth and predicted maintenance ...
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Steller sea lions prefer to swim and hunt in colder waters. Once a year, beginning in May, they congregate on land for the mating season. Males usually arrive first to establish their territories. Only the strongest males are able to claim enough territory to form a harem of three to 20 females. Once the females arrive, the males herd them into their territories. Often, males will fight over females by throwing their bodies against each other and biting. Young pups are fed by their mother for at least the first three months and sometimes up to a year. At one month, they are able to swim and by the time theyre three months old, they are able to catch their own food. They feed on squid and octopus as well as herring, mackerel and salmon.. One of the greatest threats to the Steller sea lion population is human activity, including oil spills and increased competition with the commercial fishing industry.. ...
CORVALLIS, Ore. - A new study by researchers at Oregon State Universitys Marine Mammal Institute suggests most entanglements of Steller sea lions in human-made marine debris along the Pacific coast could be prevented through education and changes to manufacturing and packaging processes when the entangling materials are produced.. In the first study of its kind in the Pacific Northwest, Kim Raum-Suryan, an OSU faculty research assistant, studied Steller sea lions between 2005 and 2009 at two of Oregons most iconic locations, the Sea Lion Caves and Cascade Head. Steller sea lions use these as "haul-outs," places where the mammals rest on land between feeding forays.. Over the past 30 years, the Steller sea lion population has declined by more than 80 percent, resulting in its threatened status in the eastern portion of its range (central California to southeast Alaska) and endangered status in the western portion (western Alaska).. During the study, which was completed with funding from Oregon ...
Many nature lovers know and love the California sea lion. But did you know there are also Steller sea lions along the Pacific Coast? These sea lions are facing startling declines. Here
California Sea Lion Skull - The California sea lion is found along the Pacific coast of North America from British Columbia to Mexico. Sea lions are...
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The Steller Sea Lion is the largest of all the "eared seals," which includes fur seals and sea lions. They can be found in the Northern waters of the Pacific, running from Hokkaido, Japan over to Alaska and sometimes even down as far as California. They are carnivores, and eat fish, squids, octopuses, crustaceans, and, on occasion, smaller seals. They are able to dive 1,300ft (400m) in search of prey ...
California sea lions (Zalophus californianus), resting on floating docks. Photographed at Fishermans Wharf, San Francisco, California, USA. - Stock Image Z936/0152
The eastern population of the Steller sea lion will be taken off the threatened species list, a federal agency announced Wednesday.
California sea lion Bubba rescued after harpoon injury dies - Reuters News: (Reuters) - A massive sea lion .02/21/2018 23:08:38PM EST.
California sea lions (Zalophus californianus californianus) are large marine mammals in the pinniped suborder which also include seals and walruses. Male California sea lions can measure up to eight feet long and reach a weight of 700-800 pounds.
SAUSALITO - A young sea lion found last month with a gunshot wound to the face is recovering at the Marine Mammal Center in Sausalito.. Whirlybird, a young California sea lion, was found listless and unresponsive on a set of stairs leading to the beach near Corcoran Lagoon on July 2. The Marine Mammal Center sent a team to rescue it. Center veterinarians found one of the sea lions eyes was missing and other very cloudy. X-rays determined the sea lion had been shot in the face. Metal fragments were scattered throughout its head, and had destroyed its right eye. The left eye was damaged so severely that the sea lion, nicknamed Whirlybird, was blind in both eyes.. The animal is recovering nicely, said Jim Oswald of the Marine Mammal Center, but it wont be able to be released back into the wild.. Whirlybird "is hanging out with another gunshot wound victim, Old Ray," Oswald said.. Old Ray returned to the Marine Mammal Center in March after he was found at Moss Landing Harbor with injuries to his ...
This California sea lion (Zalophus californianus) has a severe neck laceration caused by what is likely monofiliment fishing line wrapped around its neck and digging into its skin. Monofiliment fishing line is an exceptionally thin and strong type of synthetic line used for sportfishing. Given that it is designed to be nearly invisible in the water (so the fish do not see it), it is easy to imagine how a passing sea lion, turtle or diving seabird might become tangled in it were the animal unfortunate enough to encounter abandoned monofiliment line in the water. Abandoned fishing line? Absolutely! Fisherman often simply cut their lines if they are unable to clear a snagged line. The abandoned line will last hundreds of years in the water, waiting there to entangle whatever that it comes in contact with. Such line is quite thin and consequently cuts easily into even the tough hides of sea lions. And it is strong, meant to withstand the pull of strong gamefish, so it will not easily give way even ...
Lima, Peru saw the heartwarming story about a couple of sea lions, who were struggling to stay alive after being hit by fishermen, named Camilo and Alex released back into the ocean. While it only took a month to get the sea lions back to good health, the environmental activists who cared for them worry about the animals safety as the group often finds hurt sea lions on the coast.. Two sea lions have been released into the bay off Perus capital after being nursed back to health by environmental activists.. Activists say the two sea lions suffered from pneumonia and hemorrhagic gastritis. They say those ailments are thought to have developed as a result of the animals being hit by fishermen.. The Peruvian environmental group Orca has for years been rescuing and rehabilitating injured sea lions.. Read More on bellinghamherald.com ...
Introduction. A segment of the eastern stock of Steller sea lions (Eumetopias jubatus) occurs year-round in the marine waters of British Columbia (BC), Canada. There are four breeding areas in BC, and a number of others between Cape Suckling, Alaska, and California, and these sea lions also use numerous other locations along the coast as year-round or winter haulout sites (Fisheries and Oceans Canada, 2011). Hauling out at non-rookery sites confers a number of benefits to sea lions, including rest; decreased risk of predation by killer whales (Orcinus orca); and opportunities for nursing, grooming, and social interaction. Race Rocks Ecological Reserve (RRER) is one of at least 26 major haulout sites in BC that are used only by nonbreeding animals primarily during autumn and winter (Fisheries and Oceans Canada, 2011; LGL Limited, unpub. data); both sexes and all age-classes occur at RRER. Based on re-sight data from branded animals (Edgell & Demarchi, in press), RRER is used by Steller sea lions ...
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California sea lions undergo rehab at the Pacific Marine Mammal Center. Credit: Pacific Marine Mammal Center.. Scientists from NOAA Fisheries are advising the public to stay away from all marine mammals in the wild, especially sick sea lions coming ashore on southern California beaches.. Over the past several months, emaciated and starving sea lion pups that were born on rookeries on the Channel Islands have been coming ashore in Southern California. The pups are being cared for by marine mammal rehabilitation centers in Santa Barbara, Ventura, Los Angeles, Orange and San Diego counties, however, these centers are reaching capacity.. Since January 2013, more than 1,000 sea lions have been taken to rehabilitation centers where they receive nutritional and veterinary care. As the rehabilitation centers reach capacity, they can only help the most critical cases. Although some animals are being admitted to other rescue centers in the northern part of the state, there is not enough room at stranding ...
Alava, J.J. and Salazar, S. 2006. Status and conservation of Otariids in Ecuador and the Galápagos Islands. In: A.W. Trites, S.K. Atkinson, D.P. DeMaster, L.W. Fritz, T.S. Gelatt, L.D. Rea and K.M. Wynne (eds), Sea Lions of the World, pp. 495-520. Fairbanks: Alaska Sea Grant College Program, Alaska, USA.. Baillie, J.E.M., Hilton-Taylor, C. and Stuart, S.N. 2004. 2004 IUCN Red List of Threatened Species. A Global Species Assessment. IUCN, Gland, Switzerland and Cambridge, UK.. Brock, P.M., Hall, A.J., Goodman, S.J. and Acevedo-Whitehouse, K. 2013. Applying the tools of ecological immunology to conservation: a test case in the Galapagos sea lion. Animal Conservation 16: 19-31.. Cai, W., Borlace, S., Lengaigne, M., van Rensch, P., Collins, M., Vecci, G., Timmermann, A., Santoso, A., McPhaden, M.J., Wu, L., England, M.H., Guojian, W. and Jin, F-F. 2014. Increasing frequency of extreme El Niño events due to greenhouse warming. Nature Climate Change 4: 111-116.. Cobb, K.M., Westphal, N., Sayani, ...
Theres always the chance for something to happen," he said. "Weve had some nips here and there. I can probably count them on one hand.". For the record, thats a hand with all digits intact.. The reference to pathogens refers to bacteria in a sea lions mouth, and the chemicals to various cleaners used at the facility, including disinfectants, he said.. A total of eight female Steller sea lion pups were snatched from Triangle Island off northern Vancouver Island between 1997 and 2003 to be used for research by the aquarium and the University of B.C.. Research started at the aquarium, then expanded to the open-water site in a program funded by the U.S. to research a dramatic decline in Steller sea lions in western Alaska and the Aleutian Islands.. The Open Water Research Station in Port Moody, opened in 2003, has suffered more recently from lack of funding. The U.S. National Oceanic and Atmospheric Administration provided the program with more than $1 million a year at its peak, but that ...
A California sea lion found three months with a gunshot wound to the face has been returned to the ocean after rehabilitation at SeaWorld San Diego.. The mammal was found Oct. 5 floundering on the rocks of La Jolla, severely underweight and with bite wounds to its right eye. Taken to SeaWorld, veterinarians found that he had been shot point-blank, causing the loss of his right eye.. For three months, SeaWorld specialists treated the animal with antibiotics and pain medicine. On a diet of herring, sardines and capelin, the sea lion gained 50 pounds. Finally, it was determined that the animal had sufficient eyesight in its remaining eye to catch fish and forage.. On Friday, the sea lion, now named Buck (for buckshot), was released at Border Field State Park Beach.. ALSO:. Jimmy Kimmel invited to Humboldt State after pot jokes. Junior Seau had brain disease at time of suicide, tests show. Taft Union school shooting: Panicked parents rush to students. -- Tony Perry in San Diego. Photo: Buck the sea ...
CASE HISTORY: A 1-year-old female New Zealand sea lion (Phocarctos hookeri) was intermittently observed in the Otago region of New Zealand over an 11-month period, always dragging her hind flippers. In December 2012 the sea lion was found dead, after a period of several days being observed to be harassed by male sea lions. PATHOLOGICAL FINDINGS: At gross postmortem examination the sea lion was in ...
A large, gregarious mammal, the sea lion ranges along the western coast of North America. In the water, their torpedo-shaped bodies can reach speeds of 25 to 30 miles per hour (40 to 48 kilometer per hour).
Miller, C.N., L. Polasek, A.M.C. Oliveria, and J. Maniscalco. (2017). Milk fatty acid composition of perinatal and foraging Steller sea lions: examination from pup stomachs. Canadian Journal of Zoology doi:10.1139/cjz-2016-0015.. Sattler, R., and Polasek, L. (2017) Serum estradiol and progesterone profiles during estrus, pseudopregnancy and active gestation in Steller sea lions. Journal of Zoo Biology 2017:1-9, https://doi.org/10.1002/zoo.21381. Burgess, T.L., Kreuder Johnson, C., Burdin, A., Gill, V.A., Doroff, A.M., Tuomi, P., Smith, W.A., and Goldstein, T. (2017) Brucella Infection in Asian Sea Otters (Enhydra lutris lutris) on Bering Island, Russia. Journal of Wildlife Diseases. epub, DOI 10.7589/2016-09-220. Morey, J.S., Burek Huntington, K.A., Campbell, M., Clauss, T.M., Goertz, C.E., Hobbs, R.C., Lunardi, D., Moors, A.J., Neely, M.G., Schwacke, L.H., Van Dolah, F.M. (2017) De novo transcriptome assembly and RNA-Seq expression analysis in blood from beluga whales of Bristol Bay, AK, Marine ...
We estimate that most of these pups are about 8 months old," says David Bard, director of operations. "We really arent sure why we are seeing so many now. Usually January is a relatively quiet time for us. This has taken us all by surprise.". Indeed, officials gave the go-ahead to start an extensive revamping of the centers drainage system last month considering January is "downtime." Thats all been put on hold since staff and volunteers are working round the clock to assess, treat and care for the skinny pups.. There are many theories as to what is causing so many malnourished young sea lions, but overall, scientists are stumped.. "We currently do not know the reasons for the poor condition of California sea lion pups," says Sharon Melin, research biologist for NOAA currently based in Seattle, WA..... It could be a few factors or a combination. "Starving pups at this time of year usually means that the mothers are having trouble finding enough food to support the energetic cost of ...
Get up cloes and personal with South American sea lions on this St. Thomas cruise excursion. The best excursions. The best price. Guaranteed.
Marin Countys Marine Mammal Center has been caring for a sea lion pup that was rescued from a dock on Alcatraz Island two weeks ago, spokesman Jim Oswald said. The barely 1-year-old sea lion, named "Al Catraz" by the center, was spotted on the dock on March 21 and arrived at the marine mammal center severely underweight. Although it is not unheard of for a pup to be stranded at that location, it is a rare occurrence. Oswald said that about eight pups - including animals thematically named "Fortress" and "Bird Man" - have been rescued from Alcatraz over the past two decades. When the male sea lion pup arrived at the center, Al Catraz weighed approximately 32 pounds - half the ideal weight for a pup of that age, Oswald said. "He was just really, really malnourished and in a bad location, so we immediately wanted to rescue him," Oswald said. Initially too weak to eat on his own, Al Catraz received meals in liquid form for the first few days of his stay but has since begun gobbling about 4 pounds ...
In order to clear any doubts regarding the comparative growth rates of the whiskers of harbor seals (Phoca vitulina) and Steller sea lions (Eumetopias jubatus), researchers at the Institute of Marine Science, University of Alaska Fairbanks, and the Mystic Aquarium, CT, U.S.A. performed a series of experiments in 2001.
Overview of Navy Marine Mammal Program Space and Naval Warfare Systems Center Pacific 50 year history 100 animals -Bottlenose dolphins (Tursiops truncatus) -California sea lions (Zalophus californianus) Serve the Fleet -Underwater object recovery -Swimmer detection -Mine detection Broader national interests -Marine biosensors -Comparative medicine models
Leptospirosis in California sea lions(Zalophus californianus): Do data from stranded animals accurately reflect trends in the wild population? Prager,Katherine1,2,3; Alt, David4; Buhnerkempe,Michael1,2; DeLong, Robert5; Fontaine,Christine3; Galloway,Renne6; Greig, Denise3; Guarasci,Sophie3; Gulland,Frances3; Harris, Jeff5; Johnson, Shawn3; Melin, Sharon5; Norris, Tenaya3; Orr, Anthony5; Rust, Lauren3; Wu, Qinzhong7; Zuerner,Richard4; Lloyd-Smith,James1,2. 1Department of Ecology and Evolutionary Biology, University of California, Los Angeles 2Fogarty International Center, National Institutes of Health 3The Marine Mammal Center, Sausalito, California 94965, USA 4 Infectious Bacterial Diseases Research Unit, National Animal Disease Center, Ames, Iowa50010, USA 5 National Marine Mammal Laboratory, Alaska Fisheries Science Center/NOAA, Seattle, Washington98115, USA 6 Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA 7 Hollings Marine Laboratory, National Ocean Services, ...
Part of the NBL Cell Line Collection. This cell line is neither produced nor fully characterized by ATCC. We do not guarantee that it will maintain a specific morphology, purity, or any other property upon passage.
ANCHORAGE (AP) - Scientists asked by Congress to find out why the Steller sea lion population has plummeted in Alaska have concluded commercial fishing probably is not the main culprit.
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Terrific image, Jess! Nice work! They are a pain in the butt in the Columbia River eating Salmon and Steelhead. They ambush the fish at the fish ladders ...
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Domoic acid epileptic disease is characterized by spontaneous recurrent seizures weeks to months after domoic acid exposure. The potential for this disease was first recognized in a human case study of temporal lobe epilepsy after the 1987 amnesic shellfish-poisoning event in Quebec, and was characterized as a chronic epileptic syndrome in California sea lions through investigation of a series of domoic acid poisoning cases between 1998 and 2006. The sea lion study provided a breadth of insight into clinical presentations, unusual behaviors, brain pathology, and epidemiology. A rat model that replicates key observations of the chronic epileptic syndrome in sea lions has been applied to identify the progression of the epileptic disease state, its relationship to behavioral manifestations, and to define the neural systems involved in these behavioral disorders. Here, we present the concept of domoic acid epileptic disease as a delayed manifestation of domoic acid poisoning and review the state of
BACKGROUND: A multitude of correlations between heterozygosity and fitness proxies associated with disease have been reported from wild populations, but the genetic basis of these associations is unresolved. We used a longitudinal dataset on wild Galapagos sea lions (Zalophus wollebaeki) to develop a relatively new perspective on this problem, by testing for associations between heterozygosity and immune variation across age classes and between ecological contexts. RESULTS: Homozygosity by locus was negatively correlated with serum immunoglobulin G production in pups (0-3 months of age), suggesting that reduced genetic diversity has a detrimental influence on the early development of immune defence in the Galapagos sea lion ...
California sea lions use their sensitive whiskers to detect signals in the water and can angle them in different orientations to effect the frequency and vel...
The perfectly timed dance moves of a California sea lion named Ronan have shaken up a popular scientific theory about whos got rhythm.
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