Health assessment of free-ranging endangered Australian sea lion (Neophoca cinerea) pups: effect of haematophagous parasites on haematological parameters

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
Alan D MarcusRachael Gray

Abstract

Evaluation of the health status of free-ranging populations is important for understanding the impact of disease on individuals and on population demography and viability. In this study, haematological reference intervals were developed for free-ranging endangered Australian sea lion (Neophoca cinerea) pups within the context of endemic hookworm (Uncinaria sanguinis) infection and the effects of pathogen, host, and environment factors on the variability of haematological parameters were investigated. Uncinaria sanguinis was identified as an important agent of disease, with infection causing regenerative anaemia, hypoproteinaemia, and a predominantly lymphocytic-eosinophilic systemic inflammatory response. Conversely, the effects of sucking lice (Antarctophthirus microchir) were less apparent and infestation in pups appears unlikely to cause clinical impact. Overall, the effects of U. sanguinis, A. microchir, host factors (standard length, body condition, pup sex, moult status, and presence of lesions), and environment factors (capture-type and year of sampling) accounted for 26-65% of the total variance observed in haematological parameters. Importantly, this study demonstrated that anaemia in neonatal Australian sea lion pups ...Continue Reading

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Citations

Sep 14, 2018·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Christine M MolterGeoffrey W Pye
Mar 27, 2020·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Mark R ParlierJudilee C Marrow
Jul 17, 2021·Medical and Veterinary Entomology·M S LeonardiJ Negrete

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