Canakkale Strait and the West Marmara clam (Chamelee gallina, L., 1758) AND SAND glazed alanine (Donax trunculus, L., 1758) STOCK FORECAST
PhD Thesis, Department of Fisheries Fishing and Processing Technology Supervisor: Professor Dr. Adnan TOKAÇ November 2011, 118 pages
In this study, white clam of bivalve mollusk species found extensively in the West Sea of Marmara and the Dardanelles (Chamelee gallina, L., 1758) and sand glazed alanine (Donax trunculus, L., 1758), population structure, growth, mortality and survival rates reproduction time with the determination of the stock size and condition of the stock has been tried to estimate. In a study conducted on a monthly basis between May 2006 and April 2008, sampling was carried out with the help of mechanical dredges and dredge hand.
When the biometric characteristics of the species analyzed, the individual length gallina C. 7-39 mm and weight from 0.3 to 21.05 g, and was found to vary between 11.5 to 42 mm D. trunculus and from 0.26 to 17.22 g. Both species showed negative allometric growth. D. C. gallina and age classes according to trunculus the month, respectively, were estimated to be 1-5 and 1-4 years. C. gallinaIN growth with the growth parameters K = 0.39 year-1 L = 33.05 mm, C = 0.06, O ‘= 2.63; The D. trunculus K = 0.74 yr-1, L = 38.69 mm, C = 0.15, O ‘= is calculated as 3.04. C. gallinaIN slow growth period (WP) the end of January, while D. trunculus has been identified as the end of February.
The maximum life span of C. gallina and D. trunculus respectively, 7.69 and 4.05 years, overall death rates from 0.57 to 0.73 yr-1 and 1.06 to 1.07 yr-1, while the share of life It was found to be 0.48 and 0.35 year-1. Both types of reproduction, which begins in March-April, and it was determined that ended in August. C. gallinaIN stock to new individual participation unimodal and spring (March – June), and D. trunculus bimodal and spring (April – May) and summer (July – August) was observed in the period.