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Dietary influence on growth and development of flat oyster, O strea angasi ( S owerby, 1871), larvae
Author(s) -
O'Connor Stephan,
Moltschaniwskyj Natalie,
Bolch Christopher J S,
O'Connor Wayne
Publication year - 2012
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2011.02935.x
Subject(s) - biology , metamorphosis , tetraselmis , hatchery , oyster , larva , zoology , botany , food science , fishery , algae , fish <actinopterygii>
The influence of algal diet on survival, growth and development of hatchery reared flat oyster, O strea angasi, larvae was investigated in a series of uni, binary and ternary algal diet trials. Early stage larvae (140–230 μm shell length) generally grew faster than late‐stage larvae (230–340 μm shell length) when fed unialgal diets. Of the 24 algal diets evaluated, larvae fed unialgal diets of I sochrysis sp. ( T . I so), N annochloropsis oculata , T etraselmis chuii or P avlova lutheri ; a binary diet of T . chuii + T . Iso; or ternary diets of T . chuii + T . I so combined with P . lutheri or N . oculata had the greatest larval growth, survival, development and metamorphosis, in the respective trials. The correlation between growth rate and spat produced in late‐stage larvae was stronger when fed unialgal diets ( r = 0.75) than when larvae were fed either binary or ternary diets ( r = 0.44 and r = 0.45 respectively). Marked differences in proportion of spat produced (24 h post metamorphosis) were evident among diets producing similar growth rates. For hatchery production of O . angasi larvae, ternary diets of T . chuii + T . I so combined with either P . lutheri or N . oculata were the best diets to maximize larval growth rate, development and survival 24 h post metamorphosis.