The first-feeding response of larval southern bluefin tuna, Thunnus maccoyii (Castelnau, 1872), and yellowtail kingfish, Seriola lalandi (Valenciennes, 1833), to prey density, prey size and larval density

Hilder, Pollyanna I., Cobcroft, Jennifer M., and Battaglene, Stephen C. (2015) The first-feeding response of larval southern bluefin tuna, Thunnus maccoyii (Castelnau, 1872), and yellowtail kingfish, Seriola lalandi (Valenciennes, 1833), to prey density, prey size and larval density. Aquaculture Research, 46 (11). pp. 2736-2751.

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Abstract

We investigated the first-feeding success of two species: southern bluefin tuna (Thunnus maccoyii) and yellowtail kingfish (Seriola lalandi) to determine if similar culture parameters can be used for both, especially when S. lalandi are held in the same tanks as prey for T. maccoyii. The feeding performance (proportion and intensity) was examined in three short-duration (4h) experiments: prey density, prey size and larval density. Increasing prey density from 0.5 to 25 rotifersmL(-1) increased the proportion of T. maccoyii and S. lalandi larvae feeding. Prey size alone did not affect feeding in either species. Seriola lalandi had a decreased proportion of larvae feeding when larval density reached 50 larvaeL(-1) concurrent with a gradual increase in feeding intensity between 2 and 50 larvaeL(-1). In T. maccoyii, there was no pattern to the effect of larval density on the proportion of larvae feeding. The overall feeding performance of larvae was higher in T. maccoyii than S. lalandi. Increased prey density improved the first-feeding ability of T. maccoyii and S. lalandi larvae. The effect of larval density on S. lalandi feeding requires further investigation, to ensure that they remain feeding when provided as prey in T. maccoyii culture. The identification of factors in this study, which increase first-feeding success, will improve the culture of both species.

Item ID: 50038
Item Type: Article (Refereed Research - C1)
Keywords: larviculture, Australia, marine fish larvae, biotic factors, first-feeding
ISSN: 1365-2109
Funders: Australian Seafood CRC, University of the Sunshine Coast (USC)
Projects and Grants: USC CRN Research Fellowship
Date Deposited: 30 Aug 2017 15:31
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830102 Aquaculture Fin Fish (excl. Tuna) @ 50%
83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830107 Aquaculture Tuna @ 50%
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