The size and age structure of Tridacna crocea Lamarck, 1819 (Bivalvia: Tridacnidae) in the coastal area of islands of the Cön Dao Archipelago in the South China Sea

The size and age structure of Tridacna crocea Lamarck, 1819 (Bivalvia: Tridacnidae) in the... In May 2010, an expedition on the research vessel Akademik Oparin explored the populations of the clam Tridacna crocea on reefs of the Bay Canh and Cau islands of the Cön Dao Archipelago in the South China Sea. A retrospective approach using phototechniques revealed a great similarity of the vertical distribution, growth, size, and age composition of the tridacna at these islands. The maximum density of tridacna (25 ind/m2) was characteristic of a depth of about 3 m in the area of reef flat transition to reef slope. The growth of clams can be approximated by a Bertalanffy-type equation: L t = 133.8[1 − e −0.1181(t − 0.2596)]. The lack of discreteness in the size and age compositions of populations of T. crocea indicated that population recruitment was quite stable over the years. This tends to maintain the population in a relatively stable condition, which enabled us to consider it as a possible reserve for the artificial restoration of populations of the species in impoverished coastal areas of Vietnam. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Marine Biology Springer Journals

The size and age structure of Tridacna crocea Lamarck, 1819 (Bivalvia: Tridacnidae) in the coastal area of islands of the Cön Dao Archipelago in the South China Sea

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2011 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Freshwater & Marine Ecology
ISSN
1063-0740
eISSN
1608-3377
D.O.I.
10.1134/S1063074011050129
Publisher site
See Article on Publisher Site

Abstract

In May 2010, an expedition on the research vessel Akademik Oparin explored the populations of the clam Tridacna crocea on reefs of the Bay Canh and Cau islands of the Cön Dao Archipelago in the South China Sea. A retrospective approach using phototechniques revealed a great similarity of the vertical distribution, growth, size, and age composition of the tridacna at these islands. The maximum density of tridacna (25 ind/m2) was characteristic of a depth of about 3 m in the area of reef flat transition to reef slope. The growth of clams can be approximated by a Bertalanffy-type equation: L t = 133.8[1 − e −0.1181(t − 0.2596)]. The lack of discreteness in the size and age compositions of populations of T. crocea indicated that population recruitment was quite stable over the years. This tends to maintain the population in a relatively stable condition, which enabled us to consider it as a possible reserve for the artificial restoration of populations of the species in impoverished coastal areas of Vietnam.

Journal

Russian Journal of Marine BiologySpringer Journals

Published: Nov 9, 2011

References

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