A study of delayed capture mortality syndrome in skipjack tuna, Katsuwonus pelamis (1). |
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| Authors: | R E BOURKE J BROCK R M NAKAMURA |
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| Institution: | Southwest Fisheries Center Honolulu Laboratory, National Marine Fisheries Service, NOAA, Honolulu, Hawaii, USA;Aquaculture Development Program, Department of Land and Natural Resources, Honolulu, Hawaii, USA, and College of Animal Science, Department of Tropical Agriculture and Human Resources, University of Hawaii, Honolulu, Hawaii, USA;Southwest Fisheries Center Honolulu Laboratory, National Marine Fisheries Service, NOAA, Honolulu, Hawaii, USA |
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| Abstract: | Abstract. This study was initiated to determine the cause(s) of delayed mortality in newly captured skipjack tuna, Katsuwonus pelamis (L.), being held at the National Marine Fisheries Service Kewalo Research Facility. Sixty-four per cent of 244 skipjack tuna delivered to the facility died, usually on the second or third day after capture. The capture history, morphological data, serum chemistry (21 standard parameters), haematology, and histological samples of major organs, were obtained from 30 fish sampled at sea immediately after capture, or after approximately 4, 9, 24, 48 or 500+ h in captivity. The cause(s) of death in these fish could not be attributed to anoxia, disseminated intravascular coagulation, lactic acidosis, capture myopathy or infection. Post-capture haemodilution is hypothesized as a major factor of delayed capture mortality syndrome in skipjack tuna. |
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