Growth and reproduction of the wedge clam ( Donax trunculus ) in the Sea of Marmara, Turkey

Growth and reproduction of the wedge clam ( Donax trunculus ) in the Sea of Marmara, Turkey Summary Reproduction, growth and mortality of the wedge clam Donax trunculus were studied in an unexploited population in the northern part of the Sea of Marmara. Age determination was based from counting shell increments by inspection of both the external ring structure and the internal structure on thin cross‐sections of the shell. Maximum life span was observed as 6 years for the studied population, but 4 years (shell length 40–41 mm) were usually not exceeded. Maximum length was 44.8 mm. Growth parameters were estimated as L∞ = 44.15 mm, k = 0.62 year−1, C = 1 and WP = 0.83 from external ring structure, and L∞ = 42.44 mm, k = 0.75 year−1, C = 1 and WP = 0.79 from internal growth bands (thin section). Natural mortality (M) was estimated as 0.98 year−1. Sex ratio was not significantly different from 1 : 1. The monthly maturation process was assessed macroscopically and from variation in the mean total ash‐free dry weight per shell weight of adult individuals. Spawning occurred between April and July with a peak between May and June. The recruitment pattern was unimodal. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Ichthyology Wiley

Growth and reproduction of the wedge clam ( Donax trunculus ) in the Sea of Marmara, Turkey

Journal of Applied Ichthyology, Volume 25 (5) – Oct 1, 2009

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Publisher
Wiley
Copyright
© 2009 The Author. Journal compilation © 2009 Blackwell Verlag, GmbH
ISSN
0175-8659
eISSN
1439-0426
D.O.I.
10.1111/j.1439-0426.2009.01258.x
Publisher site
See Article on Publisher Site

Abstract

Summary Reproduction, growth and mortality of the wedge clam Donax trunculus were studied in an unexploited population in the northern part of the Sea of Marmara. Age determination was based from counting shell increments by inspection of both the external ring structure and the internal structure on thin cross‐sections of the shell. Maximum life span was observed as 6 years for the studied population, but 4 years (shell length 40–41 mm) were usually not exceeded. Maximum length was 44.8 mm. Growth parameters were estimated as L∞ = 44.15 mm, k = 0.62 year−1, C = 1 and WP = 0.83 from external ring structure, and L∞ = 42.44 mm, k = 0.75 year−1, C = 1 and WP = 0.79 from internal growth bands (thin section). Natural mortality (M) was estimated as 0.98 year−1. Sex ratio was not significantly different from 1 : 1. The monthly maturation process was assessed macroscopically and from variation in the mean total ash‐free dry weight per shell weight of adult individuals. Spawning occurred between April and July with a peak between May and June. The recruitment pattern was unimodal.

Journal

Journal of Applied IchthyologyWiley

Published: Oct 1, 2009

References

  • Age and individual growth of Mesodesma mactroides (Bivalvia) in the southernmost range of its distributions
    Fiori, Fiori; Morsán, Morsán
  • Growth of the smooth clam, Callista chione (Linnaeus, 1758) (Bivalvia: Veneridae) from the Thracian Sea, northeastern Mediterranean
    Leontarakis, Leontarakis; Richardson, Richardson
  • Trace mineral profiles of the bivalve species Chamelea gallina and Donax trunculus
    Özden, Özden; Erkan, Erkan; Deval, Deval
  • Population structure and growth of Donax trunculus (Bivalvia: Donacidae) in the western Mediterranean
    Ramón, Ramón; Abelló, Abelló; Richardson, Richardson

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