𝔖 Bobbio Scriptorium
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Bacterial nutrition of great scallop larvae

✍ Scribed by J. Moal; J. F. Samain; S. Corre; J. L. Nicolas; A. Glynn

Book ID
104627347
Publisher
Springer Netherlands
Year
1996
Tongue
English
Weight
582 KB
Volume
4
Category
Article
ISSN
0967-6120

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✦ Synopsis

Bacterial nutrition of great scallop, Pecten maximus, larvae was investigated using the radioactive tracer technique. The bacterial labelling was studied initially to obtain a high and stable specific radioactivity (14C) of bacterial cells. A higher bacterial specific ~4C activity was obtained when the tracer (amino acid) was introduced in the culture medium at the beginning of the exponential growth phase. After a 12 h labelling period in a rich nutritive medium, the bacteria were depurated in seawater for 5 h (chase) to prevent further 14C excretion and then added to larval rearing vessels. The larval labelling was followed for 12 h and then larvae were placed in new vessels without radioactive bacteria. The depuration of larvae was followed for 3 days. Data obtained on ingestion and assimilation efficiency show that bivalve larvae are able to ingest and digest bacteria.

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