Table of Contents
ISRN Zoology
Volume 2013, Article ID 127287, 6 pages
http://dx.doi.org/10.1155/2013/127287
Research Article

Population Dynamics of Horse Mackerel (Trachurus Mediterraneus Ponticus) in the Bulgarian Black Sea Coast

Department of Marine Ecology and Biology, Institute of Oceanology, Bulgarian Academy of Sciences, 9000 Varna, Bulgaria

Received 22 January 2013; Accepted 17 February 2013

Academic Editors: A. Arslan, L. Kaczmarek, I. Krams, A. Robins, and C. P. Wheater

Copyright © 2013 Maria Yankova. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The horse mackerel Trachurus mediterraneus is a commercially important pelagic fish species in the Black Sea fishery. The present investigation was carried out between May and December 2010 along the Bulgarian coast of the Black Sea. Population parameters of horse mackerel from the trawl and fishing nets catches were estimated from length frequency data, by using ELEFAN-I computer program. The ELEFAN-I analysis gave the following Von Bertalanffy Growth Function (VBGF) parameters: the asymptotic length  cm, growth coefficient value was , and the hypothetical age at which length is zero was . Based on these growth parameters, the total mortality coefficient ( ) during the study period was estimated to be 2.99. The estimated value for natural mortality ( ) was 1.08; hence, the fishing mortality coefficient ( ) was 1.91. The estimated value for the exploitation rate ( ) using the length converted catch curve was 0.64. The estimated sizes of T. mediterraneus at 25, 50, and 75 percent probabilities of capture were 16.80 cm, 18.72 cm, and 20.64 cm, respectively.