Hematological responses of the grey carpet shark (Chiloscyllium punctatum) and the epaulette shark (Hemiscyllium ocellatum) to anoxia and re-oxygenation

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Hypoxia Tolerance in the Epaulette Shark (Hemiscyllium ocellatum)

The epaulette shark, Hemiscyllium ocellatum, is a tropical reef shark that can live in an environment with cyclic periods of low oxygen concentration, suggesting that it has a well-developed capacity for anaerobic metabolism. Most investigations of hypoxia-tolerant teleosts and reptiles have focused on species that inhabit cold environments. This study was carried out on a tropical reef shark i...

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Fecal corticosterone assessment in the epaulette shark, Hemiscyllium ocellatum.

The present study examined the feasibility of measuring the steroid hormone corticosterone in fecal extracts of epaulette sharks, Hemiscyllium ocellatum. Six immature, captive-raised epaulette sharks (four females and two males) were obtained from two different zoos and were maintained in a closed-system, 530-liter aquarium. After a one-month adaptation, fecal samples were collected daily from ...

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Plasma steroid hormone profiles and reproductive biology of the epaulette shark, Hemiscyllium ocellatum.

Examination of the reproductive biology of the oviparous epaulette shark, Hemiscyllium ocellatum, was conducted on a wild population. Male sharks were found to reach maturity at between 55-60 cm total length (TL) and female sharks mature around 55 cm TL. Blood samples collected from mature male and female sharks were analyzed for sex steroid hormones to examine seasonal hormone patterns. Plasma...

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Electroreceptive and Mechanoreceptive Anatomical Specialisations in the Epaulette Shark (Hemiscyllium ocellatum)

The arrangement of the electroreceptive ampullary system and closely related mechanoreceptive lateral line canal system was investigated in the epaulette shark, Hemiscyllium ocellatum. The lateral line canals form an elaborate network across the head and are continuously punctuated by pores. Ampullary pores are distributed in eleven distinct pore fields, and associated ampullary bulbs are aggre...

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A product of its environment: the epaulette shark (Hemiscyllium ocellatum) exhibits physiological tolerance to elevated environmental CO2

Ocean acidification, resulting from increasing anthropogenic CO2 emissions, is predicted to affect the physiological performance of many marine species. Recent studies have shown substantial reductions in aerobic performance in some teleost fish species, but no change or even enhanced performance in others. Notably lacking, however, are studies on the effects of near-future CO2 conditions on la...

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ژورنال

عنوان ژورنال: Journal of Experimental Zoology Part A: Ecological Genetics and Physiology

سال: 2009

ISSN: 1932-5223,1932-5231

DOI: 10.1002/jez.539