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Use of centrifuged and preserved microalgae for feeding juvenile Manila clam (Tapes philippinarum): effects on growth and fatty acid composition

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Author(s): Alessio Bonaldo | Anna Badiani | Silvia Testi | Giovanni Corso | Attilio Luigi Mordenti | Pier Paolo Gatta

Journal: Italian Journal of Animal Science
ISSN 1594-4077

Volume: 4;
Issue: 4;
Start page: 375;
Date: 2010;
Original page

Keywords: Manila clam | Tapes philippinarum | Algal pastes | Bivalve nutrition | Fatty acids

ABSTRACT
The objective of the present study was to assess the nutritional value of three diets containing commercial preserved  microalgae pastes and the relationship of their biochemical composition to the growth rate and fatty acids profile of juve-  nile Tapes philippinarum.  The feeding period was 6 weeks. At a daily ratio of 1% dry weight live weight of the clams–1, the trispecific diet with 40%  of I. galbana, 20% of T. suecicaand 40% of C. muelleri supported greater growth of animals than either a mixture of  80% of I. galbanaand 20% T. suecicaor I. galbanaalone (P< 0.05). Even the fatty acid profile was significantly modi-  fied depending on the composition of the diets. In particular a decrease of EPA was observed in clams with the lowest  growth rate.
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