Captive care of and research on Arctic fish and invertebrates

Graham, Mark S.; Wong, K.M.

doi:10.1111/j.1748-1090.1991.tb02373.x

Cited by 2 publications

(2 citation statements)

References 3 publications

(1 reference statement)

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“…Arctic cod adapted well to laboratory conditions, and fed readily on frozen food. Once in Vancouver, fish were kept at 1˚ ± 1˚C in an 800 L fibreglass tank as part of a closed system of water filtration (Graham and Wong, 1992). Fluorescent lighting was controlled to approximate the light/dark cycle for Vancouver.…”

Section: Methodsmentioning

confidence: 99%

“…Aspects of reproductive and larval biology of the Arctic cod were studied at the Vancouver Aquarium's arctic marine holding facility for fish and invertebrates (Graham and Wong, 1992). The objective was to study adult cod during captive spawning under arctic-like conditions in the laboratory, and to describe hatching and larval development.…”

Section: Introductionmentioning

confidence: 99%

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Aspects of Reproduction and Larval Biology of Arctic Cod (<i>Boreogadus saida</i>)

Graham¹,

Hop²

1995

ARCTIC

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Arctic cod (Boreogadus saida) were captured from Resolute Bay, Northwest Territories, shipped to Vancouver and reared in holding tanks for up to three years. Spawning and development of larvae were monitored in two separate years. Fish that were in the laboratory for less than one year spawned during the normal spawning period for wild fish, January to February. The timing of spawning was altered by water temperature and light regime. Elevated water temperature caused spawning to occur earlier, and increased mortality and rate of deformity in larvae. The absence of "light" and "dark" seasons may have caused spawning to deviate from the predicted time in successive years. Larvae hatched at 87-91˚C•days. The newly hatched planktonic larvae were 5 -6 mm long (total length), non-pigmented, and had poor swimming ability, likely because of the large yolk sac (1.5 mm in length). Even though swimming ability remained poor for the entire rearing time (up to 100 days), it improved as the yolk dissipated. Yolk nutrition lasted 20 to 40 days after hatching. Healthy larvae remained within the top 15 cm of the water column, and fed on brine shrimp and barnacle nauplii, and oyster trochophores. Growth rate under laboratory conditions was similar to those for fish sampled from the field. Fish that were not near the surface did not grow.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%