Academic literature on the topic 'Arctocephalus pusillus'
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Journal articles on the topic "Arctocephalus pusillus"
Almansa Ruiz, José Carlos, Carol Knox, Sonja Boy, and Gerhard Steenkamp. "Dentigerous cyst in a South African fur seal (Arctocephalus pusillus pusillus)." Veterinary Record Case Reports 8, no. 2 (June 2020): e001180. http://dx.doi.org/10.1136/vetreccr-2020-001180.
Full textColitz, Carmen M. H., Jens-Christian Rudnick, and Steffen Heegaard. "Bilateral ocular anomalies in a South African fur seal (Arctocephalus pusillus pusillus)." Veterinary Ophthalmology 17, no. 4 (October 8, 2013): 294–99. http://dx.doi.org/10.1111/vop.12100.
Full textPolasek, Lori K., Charles Frost, Jeremy H. M. David, Michael A. Meyer, and Randall W. Davis. "Myoglobin Distribution in the Locomotory Muscles of Cape Fur Seals (Arctocephalus pusillus pusillus)." Aquatic Mammals 42, no. 4 (December 1, 2016): 421–27. http://dx.doi.org/10.1578/am.42.4.2016.421.
Full textKirkman, S. P., D. P. Costa, A. L. Harrison, P. G. H. Kotze, W. H. Oosthuizen, M. Weise, J. A. Botha, and J. P. Y. Arnould. "Dive behaviour and foraging effort of female Cape fur seals Arctocephalus pusillus pusillus." Royal Society Open Science 6, no. 10 (October 2019): 191369. http://dx.doi.org/10.1098/rsos.191369.
Full textLipinski, M. R., and J. H. M. David. "Cephalopods in the diet of the South African fur seal (Arctocephalus pusillus pusillus)." Journal of Zoology 221, no. 3 (July 1990): 359–74. http://dx.doi.org/10.1111/j.1469-7998.1990.tb04007.x.
Full textP. N. Odendaal, M. N. Bester, M. van der Merwe, and W. H. Oosthuizen. "Seasonal changes in the ovarian structure ofthe Cape fur seal, Arctocephalus pusillus pusillus." Australian Journal of Zoology 50, no. 5 (2002): 491. http://dx.doi.org/10.1071/zo01016.
Full textKlotz, Daniela, Jörg Hirzmann, Christian Bauer, Joachim Schöne, Maximilian Iseringhausen, Peter Wohlsein, Wolfgang Baumgärtner, and Vanessa Herder. "Subcutaneous merocercoids of Clistobothrium sp. in two Cape fur seals (Arctocephalus pusillus pusillus)." International Journal for Parasitology: Parasites and Wildlife 7, no. 1 (April 2018): 99–105. http://dx.doi.org/10.1016/j.ijppaw.2018.02.003.
Full textCurtis, S., S. H. Elwen, N. Dreyer, and T. Gridley. "Entanglement of Cape fur seals (Arctocephalus pusillus pusillus) at colonies in central Namibia." Marine Pollution Bulletin 171 (October 2021): 112759. http://dx.doi.org/10.1016/j.marpolbul.2021.112759.
Full textBrunner, S. "Cranial morphometrics of the southern fur seals Arctocephalus forsteri and A. pusillus (Carnivora : Otariidae)." Australian Journal of Zoology 46, no. 1 (1998): 67. http://dx.doi.org/10.1071/zo97020.
Full textOsiecka, Anna N., Jack Fearey, Simon Elwen, and Tess Gridley. "Prolonged nursing in Cape fur seals (Arctocephalus pusillus pusillus) at Cape Cross colony, Namibia." African Zoology 55, no. 3 (July 2, 2020): 233–39. http://dx.doi.org/10.1080/15627020.2020.1768144.
Full textDissertations / Theses on the topic "Arctocephalus pusillus"
Gibbens, John Robert. "Demography of Australian fur seals (Arctocephalus pusillus doriferus)." Connect to thesis, 2009. http://repository.unimelb.edu.au/10187/5788.
Full textFemale age, survival, fecundity, breeding and physiology were studied at Kanowna Island, Bass Strait, Australia, between 2003 – 2006 by conducting censuses and captures (n = 294). Mark-recapture estimates of pup production were used to validate direct pup counts, allowing a 9-year dataset to be used for calculation of the population growth rate (2.2% p.a.) and investigation of environmental influences on reproductive success. Annual pup production (x = 3108) was synchronous, with 90% of births occurring within 28 days of the median birth date of 23 November. Births occurred earlier in years when pup production and female body condition were high and these factors were correlated with local oceanographic indicators, suggesting that reproductive success is constrained by environmentally-mediated nutritional stress.
Pregnancy was assessed by blood plasma progesterone radioimmunoassay and the pupping status of the same females was observed during breeding season. Despite high mid-gestation pregnancy rates (x = 84%), the birth rate was lower than in other fur seals (x = 53%), suggesting that late-term abortion is common. Lactating females were less likely to pup, indicating that nutrition may be insufficient to support concurrent lactation and gestation.
Age and morphometric data were used to construct body growth, age structure and survivorship models. Adult female survival rates were similar to those of other fur seals (x = 88.5%). A life table was constructed and its age-specific survival and fecundity rates used in a Leslie-matrix model to project the population growth rate (2.2% p.a.) and determine the relative influence of each parameter. The abundance of female non-pups was 6 times greater than that of female pups, which is approximately 50% higher than previous conversion factors used to extrapolate population abundance from pup censuses in Australian fur seals. However, if the non-pup sex ratios of other otariids are considered, the pup:population conversion factor is 4.5.
Compared to a study performed before the recent population increase, the modern population displays similar body growth and fecundity rates but higher survival rates. This suggests that recent population growth resulted from a relaxation of hunting and/or predation mortality rather than from increased food availability. The low population growth rate is attributed to a low birth rate associated with nutritional stress, yet despite this, body growth occurs rapidly. Such characteristics are typical of sea lions rather than fur seals, perhaps because Australian fur seals employ the typical sea lion strategy of using benthic foraging to exploit a continental shelf habitat. The effect of ecological niche on population dynamics in the Otariidae is discussed.
Mecenero, Silvia. "The diet of the Cape fur seal Arctocephalus pusillus pusillus in Namibia : variability and fishery interactions." Doctoral thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/4387.
Full textHuisamen, Johan. "Recolonisation of the Robberg Peninsula by the Cape Fur Seal Arctocephalus pusillus pusillus and its prey preferences." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1006438.
Full textKim, Sunghee. "Olfactory discrimination ability of South African fur seals (Arctocephalus pusillus) for enantiomers." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-78364.
Full textLord, Elin. "Olfactory discrimination of aliphatic 2-ketones and 1-alcohols in South African fur seals (Arctocephalus pusillus pusillus)." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-18932.
Full textOppermann, Daniela [Verfasser]. "Dressurexperimente zum Kontrast- und Farbensehen von Phoca vitulina und Arctocephalus pusillus / Daniela Oppermann." Mainz : Universitätsbibliothek Mainz, 2015. http://d-nb.info/1075942934/34.
Full textMarcelino, Inês da Silva Soleiro Nunes. "Estudo sobre parasitoses cardiopulmonares e gastrointestinais em pinípedes num contexto zoológico." Master's thesis, Universidade de Lisboa. Faculdade de Medicina Veterinária, 2016. http://hdl.handle.net/10400.5/10849.
Full textCom o objetivo de identificar parasitas e doenças parasitárias de pinípedes que vivem sob cuidados humanos em Portugal, realizou-se um estudo sobre parasitoses cardiopulmonares e gastrointestinais na coleção de pinípedes pertencente ao Zoomarine – Mundo Aquático S.A., que se situa no Algarve. No total, foram colhidas 19 amostras sanguíneas e 79 amostras fecais de 20 indivíduos de três espécies: foca-comum (Phoca vitulina) (n=6), foca-cinzenta (Halichoerus grypus) (n=2) e leão-marinho-californiano (Zalophus californianus) (n=6) e de uma subespécie, otária-sul-africana (Arctocephalus pusillus pusillus) (n=6). As amostras sanguíneas foram analisadas utilizando o teste rápido de antigénio WITNESS®Dirofilaria e a técnica de Knott modificada. Para as amostras fecais utilizaram-se as técnicas de McMaster, Flutuação de Willis, Sedimentação em meio saturado, Técnica de Baermann modificada e esfregaços fecais corados pela técnica de Ziehl-Neelsen. O teste rápido foi positivo em duas focas-comuns e detetaram-se microfilárias correspondentes a D. immitis numa otária-sul-africana. As análises fecais, na sua totalidade, foram consideradas negativas. Realizou-se também a identificação morfológica de nemátodes encontrados em necrópsias de duas otárias-sul-africanas e seu exame histopatológico correspondente. Os vermes adultos encontrados no coração e artéria pulmonar foram identificados como D. immitis, tornando-se este trabalho, no conhecimento da autora, o primeiro registo em A. p. pusillus a nível mundial e também o primeiro registo da infeção por este nemátode em pinípedes em Portugal. Atendendo a que o Algarve é considerado uma região endémica para este parasita e sendo a Dirofilariose uma doença re-emergente nesta e noutras zonas do País, é importante dar uma continuidade a este e outros estudos sobre parasitas transmissíveis por vetores, para melhor compreender os efeitos desta e outras parasitoses em pinípedes em ambiente zoológico.
ABSTRACT - Cardiopulmonary and Gastrointestinal Parasites in Pinnipeds in a Zoological Context - In order to identify parasites and parasitic diseases of pinnipeds that live under human care in Portugal, we performed a study on cardiopulmonary and gastrointestinal parasites in the pinniped group belonging to Zoomarine – Mundo Aquático S.A., which is located in the Algarve. In total, 19 blood samples and 79 fecal samples were collected from 20 individuals from three species: common seal (Phoca vitulina) (n=6), grey seal (Halichoerus grypus) (n=2) and California sea lion (Zalophus californianus) (n=6) and from one subspecies, South African fur seal (Arctocephalus pusillus pusillus) (n=6). Blood samples were tested using a Dirofilaria immitis commercial antigen test (WITNESS®Dirofilaria) and modified Knott's technique. Fecal samples were tested using McMaster technique, Willis Flotation, Sedimentation, modified Baermann technique and fecal smears stained by Ziehl-Neelsen technique. Two samples from common seals tested positive in the antigen test and one sample from a South African fur seal showed microfilariae consistent with D. immitis. All the fecal samples tested negative. The morphological identification of worms found in necropsies of two South African fur seals was also performed, as well as, the corresponding histopathological analysis. The adult worms found in the heart and pulmonary artery at the necropsies, were identified as D. immitis, and to the author’s knowledge, this work is the first world report of D. immitis infection in A. p. pusillus and the first report of this nematode in a pinniped group in Portugal. As the Algarve is considered an endemic area for this parasite and as Dirofilariasis is a reemergent disease in several areas of the country, it is important to continue researching this and other vector-borne diseases in order to fully understand the effects of parasitic diseases in pinnipeds in a zoological context.
Stewardson, Carolyn Louise. "Biology and conservation of the Cape (South African) fur seal Arctocephalus pusillus pusillus (Pinnipedia:Otariidae) from the Eastern Cape coast of South Africa." Connect to this title online, 2001. http://thesis.anu.edu.au/public/adt-ANU20030124.162757/.
Full textTitle from PDF title page (viewed May 8, 2005). Consists of reprints of thirteen published papers, some co-authored with others, plus an introductory chapter, two unpublished manuscripts, and a conclusion. Includes bibliographical references.
Stewardson, Carolyn Louise, and carolyn stewardson@anu edu au. "Biology and conservation of the Cape (South African) fur seal Arctocephalus pusillus pusillus (Pinnipedia: Otariidae) from the Eastern Cape Coast of South Africa." The Australian National University. Faculty of Science, 2002. http://thesis.anu.edu.au./public/adt-ANU20030124.162757.
Full textStewardson, Carolyn Louise. "Biology and conservation of the Cape (South African) fur seal arctocephalus pusillus pusillus (Pinnipedia: Otariidae)from the Eastern Cape Coast of South Africa /." View thesis entry in Australian Digital Theses Program, 2001. http://thesis.anu.edu.au/public/adt-ANU20030124.162757/index.html.
Full textBooks on the topic "Arctocephalus pusillus"
Shaughnessy, P. D. Population size of the Cape fur seal, Arctocephalus pusillus. Cape Town: Republic of South Africa, Dept. of Environment Affairs, Sea Fisheries Research Institute, 1987.
Find full textShaughnessy, P. D. Population size of the Cape fur seal, Arctocephalus pusillus. Cape Town: Republic of South Africa, Dept. of Environment Affairs, Sea Fisheries Research Institute, 1993.
Find full textPopulation size of the Cape fur seal Arctocephalus pusillus. Cape Town: Sea Fisheries Research Institute, 1999.
Find full textOosthuizen, W. H. Non-breeding colonies of the South African (Cape) fur seal, Arctocephalus pusillus pusillus in southern Africa. Cape Town: Republic of South Africa, Dept. of Environment Affairs, Sea Fisheries Research Institute, 1988.
Find full textBook chapters on the topic "Arctocephalus pusillus"
Elliott, Max S. "Notes on weaning and prolonged lactation in Australian Fur-seals (Arctocephalus pusillus doriferus) at Taronga Zoo." In Marine Mammals of Australasia, 121–23. P.O. Box 20, Mosman NSW 2088, Australia: Royal Zoological Society of New South Wales, 1988. http://dx.doi.org/10.7882/rzsnsw.1988.005.
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