A retrospective survey of the ocular histopathology of the pinniped eye with emphasis on corneal disease

Miller, Samantha; Colitz, Carmen M.H.; Leger, Judy St.; Dubielzig, Richard R.

doi:10.1111/j.1463-5224.2012.01040.x

Cited by 18 publications

(6 citation statements)

References 30 publications

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“…The Hawaiian monk seals in this study had varying degrees of visual impairment (no impairment, n=2; partial impairment, n=4; full impairment, n=1). Visual impairment is relatively common in captive and wild pinnipeds, including Hawaiian monk seals (Greenwood, 1985;Hanson et al, 2009;Miller et al, 2013). All seals participated in the feeding trials, and there was no statistical effect of visual acuity on feeding performance.…”

Section: Study Animalsmentioning

confidence: 99%

Hawaiian monk seals exhibit behavioral flexibility when targeting prey of different size and shape

Kienle

Cacanindin

Kendall

et al. 2019

Journal of Experimental Biology

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Animals use diverse feeding strategies to capture and consume prey, with many species switching between strategies to accommodate different prey. Many marine animals exhibit behavioral flexibility when feeding to deal with spatial and temporal heterogeneity in prey resources. However, little is known about flexibility in the feeding behavior of many large marine predators. Here, we documented the feeding behavior and kinematics of the endangered Hawaiian monk seal (Neomonachus schauinslandi, n=7) through controlled feeding trials. Seals were fed multiple prey types (e.g. night smelt, capelin, squid and herring) that varied in size and shape to examine behavioral flexibility in feeding. Hawaiian monk seals primarily used suction feeding (91% of all feeding trials) across all prey types, but biting, specifically pierce feeding, was also observed (9% of all feeding trials). Suction feeding was characterized by shorter temporal events, a smaller maximum gape and gape angle, and a fewer number of jaw motions than pierce feeding; suction feeding kinematic performance was also more variable compared with pierce feeding. Seals showed behavioral flexibility in their use of the two strategies. Suction feeding was used most frequently when targeting small to medium sized prey and biting was used with increasing frequency on larger prey. The feeding kinematics differed between feeding strategies and prey types, showing that Hawaiian monk seals adjusted their behaviors to particular feeding contexts. Hawaiian monk seals are opportunistic marine predators and their ability to adapt their feeding strategy and behavior to specific foraging scenarios allows them to target diverse prey resources.

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Section: Study Animalsmentioning

confidence: 99%

Hawaiian monk seals exhibit behavioral flexibility when targeting prey of different size and shape

Kienle

Cacanindin

Kendall

et al. 2019

Journal of Experimental Biology

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“…Corneal ulcers occur in both captive and wild pinnipeds, and while the etiology of the condition is being investigated in both populations, physical trauma, changes in water quality, excessive sunlight, viral infections, underlying uveitis, and other factors have been attributed to ocular surface damage . In the rehabilitation setting at TMMC, corneal ulcers are most frequently attributed to trauma.…”

Section: Discussionmentioning

confidence: 99%

Subconjunctival antimicrobial poloxamer gel for treatment of corneal ulceration in stranded California sea lions (Zalophus californianus)

Simeone

Colitz

Colegrove

et al. 2016

Veterinary Ophthalmology

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“…The remaining articles focused on the ocular or oral cavity. Cross-sectional surveys of opportunistically collected eyes from both wild and captive NFSs, contributed general information on gross and histologic changes in NFS eyes, but lacked associated information on individual or population health impacts [84][85][86]. Similarly, two articles described dental disease and temporomandibular joint pathology in museum collection NFS skulls, but nothing was reported about the relationship between observed lesions and other causes of morbidity or mortality [86,87].…”

Section: Othermentioning

confidence: 99%

A Review of Northern Fur Seal (Callorhinus ursinus) Literature to Direct Future Health Monitoring Initiatives

Cortés

Patyk

Simeone³

et al. 2022

Oceans

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Northern fur seals (Callorhinus ursinus, NFS) are a vulnerable species broadly distributed throughout the north Pacific. Although commercial hunting stopped in 1984, the population has continued to decline for unknown reasons. The goal of this scoping review was to synthesize and review 50 years of literature relevant to the health of NFS to inform the development of health surveillance recommendations. Search criteria were developed and applied to three databases, followed by title and abstract screening and full text review. Articles published between 1 January 1972 and 31 December 2021 were included. Articles were categorized by health determinant, and further as relating to ten subcategories of disease. Data were summarized descriptively. A total of 148 publications met the criteria for inclusion. Infectious disease reports were common, primarily relating to metazoan parasite presence. The presence of zoonotic pathogens such as Coxiella burnetii and Brucella spp. is of public health interest, although a failure to link disease research to individual animal or population health outcomes was consistent across the literature. A shift away from the single agent focus of disease programs toward more holistic, health-oriented perspectives will require broader interdisciplinary collaboration. These findings can inform stakeholders and help them to prioritize and strategize on future NFS health research efforts.

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A retrospective survey of the ocular histopathology of the pinniped eye with emphasis on corneal disease

Abstract: This is the first report of ocular amyloid in pinniped eyes. All cases of neoplasia were in a pattern suggesting metastatic disease. In this study, there was a higher prevalence of ocular disease in captive pinnipeds, particularly in the posterior cornea.

Cited by 18 publications

References 30 publications

Hawaiian monk seals exhibit behavioral flexibility when targeting prey of different size and shape

Hawaiian monk seals exhibit behavioral flexibility when targeting prey of different size and shape

Subconjunctival antimicrobial poloxamer gel for treatment of corneal ulceration in stranded California sea lions (Zalophus californianus)

A Review of Northern Fur Seal (Callorhinus ursinus) Literature to Direct Future Health Monitoring Initiatives

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