Growth of Oyster (Crassostrea virginica) Larvae in Small-Scale Systems Using an Algae Concentrate Food Source

Replicated studies are advantageous for optimizing larval rearing of the Eastern oyster (Crassostrea virginica) and increasing the availability of high-quality seed for the continued expansion of the U.S. oyster aquaculture industry. Although small-scale systems using live algal feeds have been used...

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Bibliographic Details
Published in:Aquaculture research 2024, Vol.2024 (1)
Main Authors: Tarnecki, Andrea M., Cleveland, Alexes, Capps, Meghan, Rikard, F. Scott
Format: Article
Language:English
Subjects:
Aeration
Aeration tanks
Airlifts
Airlines
Algae
Aquaculture
Biofilms
Control systems
Costs
Crassostrea virginica
Food sources
Individual rearing
Labour
Larvae
Live feeds
Marine molluscs
Microcosms
Oysters
Polyculture (aquaculture)
Polyvinyl chloride
Seawater
Serology
Shellfish
Survival
Tanks
Water quality
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Summary:Replicated studies are advantageous for optimizing larval rearing of the Eastern oyster (Crassostrea virginica) and increasing the availability of high-quality seed for the continued expansion of the U.S. oyster aquaculture industry. Although small-scale systems using live algal feeds have been used successfully, rearing larvae on algae concentrate presents additional challenges. To determine the feasibility of rearing oyster larvae in small-scale systems using algae concentrate, oyster larvae were raised for 2 weeks in replicate control (1,000 L) and microcosm (17 L) tanks. Five aeration strategies were tested in the microcosms in two separate trials. Results of this study indicate similar survival in small systems compared to controls through the appearance of eyed larvae. Accumulated algae and pink biofilm formation in microcosms using polyvinyl chloride (PVC) airlifts suggest that this aeration strategy is undesirable. One- and 5-mL air injectors maintained higher overnight oxygen levels than controls. The recovery of more eyed larvae after 14 dpf in control systems may be the result of significant temperature fluctuations in microcosms. Overall, this study demonstrates that algae concentrate can be used to rear oyster larvae in small-scale systems, providing a live feed alternative that saves space and labor in replicated studies.
ISSN:1355-557X
1365-2109
DOI:10.1155/2024/1890826