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Growth and mortality of transplanted juvenile hard clams Mercenaria mercenaria in the Northern Indian River Lagoon, Florida Marelli, D.C.; Arnold, W.S. (1996). Growth and mortality of transplanted juvenile hard clams Mercenaria mercenaria in the Northern Indian River Lagoon, Florida. J. Shellfish Res. 15(3): 709-713 In: Journal of Shellfish Research. National Shellfisheries Association: Duxbury. ISSN 0730-8000; e-ISSN 1943-6319

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Beschikbaar in	Auteurs
VLIZ: Open access 284544 [ download pdf ]

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Trefwoorden

Aquaculture ASW, USA, Florida, Indian River Lagoon Growth Mortality Mercenaria mercenaria (Linnaeus, 1758) [WoRMS] Indian River Lagoon [Marine Regions] Marien/Kust

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Auteurs		Top
Marelli, D.C. Arnold, W.S.

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Abstract

Growth and mortality were examined in hatchery-produced, early-juvenile Mercenaria mercenaria transplanted to protected and unprotected plots at a site in the northern Indian River lagoon, Florida. Clam density and size were examined in both treatments five times in the year after transplantation. The growth of clams in both treatments was rapid and comparable to that of clams from other areas within the lagoon. Growth in the protected treatment was initially depressed, but after 363 days, clams from both treatments did not differ significantly in shell height (SH). The mortality of clams in both treatments was high, although significantly greater in the open treatment. Clams in the protected treatment died at a high rate until 80 days into the experiment (SH about 8 mm), beyond which no significant mortality occurred. This experiment suggests that (1) growth rates in the northern Indian River lagoon may favor future aquaculture ventures; (2) clams can be grown out in the lagoon (if protected from epibenthic predators) when they are 8 mm SH, much smaller than current aquaculture practice suggests; and (3) placing unprotected juvenile clams in situ at high densities is not an efficient stock-enhancement technique.

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