Influence of the prey items switched from rotifers to yolk-sac larvae on growth of laboratory-reared Pacific bluefin tuna

We investigated the influence of the timings (days after hatching, DAH) of the prey switch from rotifers to yolk-sac larvae of spangled emperor on the growth and its variations of Pacific bluefin tuna larvae. The five timings of prey switch were conducted on 17, 20, 23, 26 DAH and no switched group....

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Bibliographic Details
Published inAquaculture Science Vol. 63; no. 4; pp. 455 - 457
Main Authors Tanaka, Yosuke, Kumon, Kazunori, Higuchi, Kentaro, Eba, Takeshi, Nishi, Akefumi, Nikaido, Hideki, Shiozawa, Satoshi
Format Journal Article
LanguageEnglish
Published Japanese Society for Aquaculture Science 2015
Subjects
Feeding regime
Growth
Pacific bluefin tuna
Piscivory
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Summary:We investigated the influence of the timings (days after hatching, DAH) of the prey switch from rotifers to yolk-sac larvae of spangled emperor on the growth and its variations of Pacific bluefin tuna larvae. The five timings of prey switch were conducted on 17, 20, 23, 26 DAH and no switched group. Mean larval body lengths (mm) in each group on 29 DAH were 27.27, 23.38, 17.23, 13.45 and 9.58, respectively, indicating that earlier prey switch induced larger larval body sizes. No relationship between the timing of prey switch and the growth variation in the coefficient of variation was found.
ISSN:0371-4217
2185-0194
DOI:10.11233/aquaculturesci.63.455