Abstract
The tissues and parasites collected from Peruvian fur seals (Arctocephalus australis) and South American sea lions (Otaria byronia) found dead at Punta San Juan, Peru were examined. The respiratory mite, Orthohalarachne attenuata infected 3 out of 32 examined fur seals and 3 out of 8 examined sea lions, however caused moderate to severe lymphohistiocytic pharyngitis only in fur seals. Hookworms, Uncinaria sp, infected 6 of the 32 examined fur seals causing variable degrees of hemorrhagic and eosinophilic enteritis. This parasite caused the death of 2 of these pups. In fur seals and sea lions, Corynosoma australe and Contracaecum osculatum were not associated with significant tissue alterations in the intestine and stomach respectively. Respiratory mites and hookworms have the potential to cause disease and mortality among fur seals, while parasitic infections do not impact significatively the health of sea lions at Punta San Juan, Peru.
Acknowledgements
Mauricio Seguel was supported by a Morris Animal Foundation fellowship (Grant N D16ZO-413). Sample collection at Punta San Juan - RNSIIPG was authorized by research permit RJ No.09-2013-SERNANP-RNSIIPG, and funded by Chicago Zoological Society’s Chicago Board of Trade Endangered Species Fund. We gratefully acknowledge support from SERNANP and facility access by Agrorural at Punta San Juan
References
Cárdenas-Alayza S.,Oliveira L. 2016. Arctocephalus australis (Peruvian/Northern Chilean subpopulation). The IUCN Red List of Threatened Species 2016: e.T72050476A72050985. http://dx.doi.org/10.2305/IUCN.UK.2016-1.RLTS.T72050476A72050985.en. Downloaded on 03 October 201710.2305/IUCN.UK.2016-1.RLTS.T72050476A72050985.enSearch in Google Scholar
Cárdenas-Alayza S., Oliveira L., Crespo E. 2016. Arctocephalus australis. The IUCN Red List of Threatened Species 2016: e.T2055A45223529. http://dx.doi.org/10.2305/IUCN.UK.20161.RLTS.T2055A45223529.en. Downloaded on 26 April 2017Search in Google Scholar
Banks N.1910. New American Mites (Arachnoidea, Acarina). Proceedings Entomological Society of Washington, 12, 2–12Search in Google Scholar
Baylis H.A. 1933. A new species of the nematode genus Uncinaria from a sea-lion, with some observations on related species. Parasitology, 25, 308–31610.1017/S0031182000019508Search in Google Scholar
Bakun A. and Weeks S.J., 2008. The marine ecosystem off Peru: What are the secrets of its fishery productivity and what might its future hold? Progress in Oceanography, 79, 290–29910.1016/j.pocean.2008.10.027Search in Google Scholar
Dierauf L. 1994. Pinniped forensic necropsy and tissue collection guide. First. Washington: National Oceanic and Atmospheric Administration; pp. 80Search in Google Scholar
Dunlap J.S. and Piperlij R.C. 1976. Lesions Associated with Orthohalarachne attenuata (Halarachnidae) in the Northern fur seal (Callorhinus ursinus). Journal of Wildlife Disease, 12, 42–44.10.7589/0090-3558-12.1.42Search in Google Scholar PubMed
Doetschaman W.H. 1944. A new species of endoparasitic mite of the family Halarachnidae (Acarina). Transactions of the American Microscopical Society, 63, 68–7210.2307/3223339Search in Google Scholar
Gomez-Puerta L. and Gonzales-Viera O. 2015. Ectoparasites from the South American sea lion (Otaria flavescens) from Peruvian coast. Revista Peruana de Biologia, 22, 259–26210.15381/rpb.v22i2.11360Search in Google Scholar
Gulland F.M. and Hall A.J. 2007. Is marine mammal health deteriorating? Trends in the global reporting of marine mammal disease. EcoHealth, 4, 135–15010.1007/s10393-007-0097-1Search in Google Scholar
Gutierrez D., Akester M., Naranjo L. 2016. Productivity and sustainable management of the Humboldt current large marine ecosystem under climate change. Environmental Development, 17, 126–14410.1016/j.envdev.2015.11.004Search in Google Scholar
Kim K.C., Haas V.L., Keyes M.C. 1980. Populations, microhabitat preference and effects of infestation of two species of Orthohalarachne (Halarachnidae: Acarina) in the northern fur seal. Journal of Wildlife Diseases, 16, 45–5110.7589/0090-3558-16.1.45Search in Google Scholar PubMed
Lichtenfels J.R. 1980. Keys to genera of the superfamilies Ancylostomatoidea and Diaphanocephaloidea. In: Anderson, R. C., Chabaud, A.G. & Willmott, S. (Eds) CIH Keys to the Nematode Parasites of Vertebrates, No. 8. Farnham Royal, Bucks, UK: Commonwealth Agricultural Bureaux, pp. 1–41Search in Google Scholar
Seguel M. and Gottdenker N. 2017. The Diversity and Impact of hookworm infections in wildlife. International Journal of Parasitology: Parasites and Wildlife, 6, 177–19410.1016/j.ijppaw.2017.03.007Search in Google Scholar PubMed PubMed Central
Seguel M., Muñoz F., Navarrete M.J., Paredes E., Howerth E., Gottdenker N. 2017. Hookworm Infection in South American Fur Seal (Arctocephalus australis) Pups. Veterinary Pathology, 54, 288–29710.1177/0300985816677151Search in Google Scholar PubMed
Seguel M., Paredes E., Pavés H., Molina R., Henríquez, F., De Groote F., Schlatter R. 2011. Pathological findings in South American fur seal pups (Arctocephalus australis gracilis) found dead at Guafo Island, Chile. Journal of Comparative Pathology, 145(2–3), 308–17.10.1016/j.jcpa.2011.01.006Search in Google Scholar PubMed
Sepúlveda M.A., Seguel M., Alvarado-rybak M., Muñoz-zanzi C., Tamayo R. 2015. Postmortem Findings in Four South American Sea Lions (Otaria byronia) from an Urban Colony. Journal of Wildlife Disease, 51, 279–28210.7589/2013-07-161Search in Google Scholar PubMed
Spraker T.R., DeLong R.L., Lyons E.T., Melin S.R. 2007. Hookworm enteritis with bacteremia in California sea lion pups on San Miguel Island. Journal of Wildlife Diseases, 43, 179–8810.7589/0090-3558-43.2.179Search in Google Scholar PubMed
Van Cleave H. 1945. The genital vestibule and its significance in the morphology and taxonomy of the Acanthocephala, with particular reference to the genus Corynosoma. Journal of Morphology, 77, 299–31510.1002/jmor.1050770303Search in Google Scholar PubMed
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