Age, growth and morphometry of the limpet <i>Cellana eucosmia</i> (Mollusca: Gastropoda) from the Gulf of Suez

Abstract

A total of 750 specimens of Cellana eucosmia were measured for growth, age determination and intra and interspecific variations in its shell morphometry. The longevity of Cellana eucosmia was extended to 5 years. The values of von Bertalanffy growth parameters (L-infinity, K and t(0)) were estimated by two different methods. The growth increment was 38% and 4.9% of the asymptotic length (L-infinity = 44.1 mm) during the I-II year and IV-V year, respectively. The average value of relative coefficient of condition (Kn) was about 1.3. The average ratio of posterior to anterior shell sloping walls was 1.499. The regression constants A and B for the various relationships of shell length to breadth, height and sloping walls, were studied.