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1 August 2015 Population Structure and Dynamics of Warty Venus, Venus verrucosa (Bivalvia, Veneridae), in North Aegean Sea, Turkey
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Abstract
The growth, reproduction, and density of warty venus clams (Venus verrucosa) were studied at a depth of 2–5 m in Baklaburnu Bay in the North Aegean Sea, Turkey. Samples were collected monthly between September 2012 and August 2013. The average density of the studied population ranged between 152 individuals m-2 (October) and 310 individuals m-2 (June). The shell length at first capture (L50%) by hand rake was 37 mm. von Bertalanffy growth parameters using the length—frequency distribution of V. verrucosa were estimated at L∞ = 57.65 mm, the rate at which the asymptotic length (L∞) is approached (K) = 0.25 y-1, theoretical age (y) when the length = 0 (t0) = -0.211, and seasonal oscillation in the growth rate was 0.30. Growth was rapid during the first 4 y of life (∼40 mm) and decreased after the 4th y. The slowest growth period was in January (winter point = 0.03). Overall growth performance, growth performance index, and potential longevity derived from seasonal parameters were calculated as 4.68, 2.92, and 12.0 y, respectively. The growth pattern showed isometric growth (slope [b] = 3.09) and the spawning period occurred from mid-June to August.
Serhat Çolakoğlu and Mustafa Palaz "Population Structure and Dynamics of Warty Venus, Venus verrucosa (Bivalvia, Veneridae), in North Aegean Sea, Turkey," Journal of Shellfish Research 34(2), (1 August 2015). https://doi.org/10.2983/035.034.0217
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