Population analysis of Tapes decussata (Bivalvia: Veneridae) in Lake Timsah, Suez Canal, Egypt
Journal Title: JOURNAL OF ADVANCES IN BIOLOGY - Year 2016, Vol 9, Issue 1
Abstract
The population of Tapesdecussatawas abundant in the southern region of Lake Timsah. It was investigated between August 2004and September 2005. Mean abundance and biomass were 76.9 ind.m-2 and 5.33 g.m-2 (flesh dry weight), respectively over the study period (n=14). Population parameters (growth, mortality and recruitment) were studied by analyzing monthly length frequency data using FiSAT ll software to evaluate the status of the stock. Asymptotic length (L∞) was found to be 50.40mm and growth co-efficient (K) was 0.810 yr-1. The growth performance index (ϕ) was 3.31. Total mortality (Z) was estimated by length-converted catch curve at 2.52yr-1, fishing mortality (F) at 1.24yr-1, and natural mortality (M) at 1.28yr-1. The exploitation rate (E= 0.49 yr-1) indicated that the fishing pressure onTapesdecussata was relatively high. Recruitment pattern was continuous with four pulses per year. These pulses were found to be correlated with the spawning pattern of the species in Lake Timsah.
Authors and Affiliations
Kandeel El-SayedKandeel
Keywords
Related Articles
- EP ID EP654555
- DOI 10.24297/jab.v9i1.4414
- Views 154
- Downloads 0
Deletion of IL-4 Receptor Alpha on B Lymphocytes renders BALB/c Mice balance Th differentiation to Leishmania major Infection during the early stage of Infection
B-lymphocytes are considered to play a minimal role in host defense against Leishmania major. In BALB/c mice, susceptibility to infection with the intracellular parasite Leishmania major is driven largely by the developm...
Home gardens in the maintenance of biological diversity
Home garden is an integrated system which comprises different things in its small area that produces a variety of foods and agricultural products including staple crops, vegetables, fruits, medicinal plants and so on. In...
Antifungal Activities and Phytochemical Screening of Seeds, Leaves and Callus (hypocotyls and cotyledons ) Extracts of Jatropha curcas L.
The research was under taken to investigate the antifungal activity of seeds , leaves and callus extracts of Jatropha curcas L. , using methanol and petroleum ether solvents. Callus was induced from hypocotyls and cotyle...
The Expression Pattern and Role of Interferon Gamma Genes in Exhaustive Exercise
This study is aimed at determining the expression patterns of interferon gamma genes, white blood cell recruitment capacity and the hormonal adaptation process in exercise exhausted young male undergraduate students. Twe...
Nutritional Assessment and Molecular Identification of Microorganisms from Akhuni/Axone: A Soybean Based Fermented Food of Nagaland, India
Soybean based fermented foods are known to be highly nutritive, not just because it contains high protein content but also due to presence of polyphenols. Various microorganisms involved during the fermentation process h...