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Growth and survival of blacklip pearl oyster larvae fed different densities of microalgae

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Doroudi, M. S., Southgate, P. C. and Mayer, R. J. (1999) Growth and survival of blacklip pearl oyster larvae fed different densities of microalgae. Aquaculture International, 7 . pp. 179-187. ISSN 1573-143X

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Article Link: https://doi.org/10.1023/A:1009207810808

Abstract

This paper reports on an experiment to determine growth and survival of blacklip pearl oyster, Pinctada margaritifera (L.), larvae fed a 1:1 mixture of Isochrysis aff. galbana clone T-ISO and Pavlova salina at six different densities (1, 2, 5, 10, 20 and 30 × 103 cells ml-1. Larval growth and survival were assessed every four days over a 20–day period. Exponential and logistic regression models were fitted to the growth and survival responses, respectively. Overall growth of larvae fed ≥5 × 103 cells ml-1 was significantly greater (p > 0.01) than growth of larvae reared at other algal densities. The optimal food ration for maximum larval growth was 20 × 103 cells ml-1, which resulted in larvae with antero-posterior shell length of 230 μm after 20 days. These larvae were significantly larger (p > 0.05) than those in all other treatments at the end of the experiment. Survival of larvae fed 0, 1 and 2 × 103 cells ml-1 was significantly lower than that of larvae in all other treatments at the end of 15 days (p > 0.01). Maximal survival (8%) over the 20 day period was shown by larvae fed 10 × 103 cells ml-1, while lower survival was shown by larvae fed 2 × 103 cells ml-1 (2%) and 1 × 103 cells ml-1 (0%).

Item Type:Article
Subjects:Aquaculture and Fisheries > Aquaculture > Feeding
Aquaculture and Fisheries > Aquaculture > Shellfish culture
Live Archive:04 Mar 2024 01:53
Last Modified:04 Mar 2024 01:53

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