Table of Contents
Advances in Ecology
Volume 2014 (2014), Article ID 274180, 8 pages
http://dx.doi.org/10.1155/2014/274180
Research Article

Sympatric Clupeoid Fish Larvae in the Northeastern Mediterranean: Coexistence or Avoidance?

Laboratory of Ichthyology, School of Biology, Aristotle University of Thessaloniki, P.O. Box 134, 541 24 Thessaloniki, Greece

Received 3 August 2014; Revised 14 October 2014; Accepted 15 October 2014; Published 10 November 2014

Academic Editor: Sveinn Are Hanssen

Copyright © 2014 Athanassios C. Tsikliras. 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 summer (July 2002 and 2003) larval concentrations of two commercially important clupeoid species (order: Clupeiformes), the European anchovy (Engraulis encrasicolus) and round sardinella (Sardinella aurita), were measured in Kavala Gulf (northern Aegean Sea), in order to examine their distribution patterns. Anchovy was generally most abundant, reaching 13 852 larvae 10 m−2 in 2003 and occurred in more stations compared to round sardinella. Despite the spawning of both species occurring across the entire gulf, the general spatial distribution of their larvae was different, with European anchovy larvae occupying the entire gulf and round sardinella larvae mainly concentrated at offshore stations. The reason proposed for the spatial segregation of their larvae is direct competition for resources. Yet, coexistence of the two species was observed in frontal areas with abundant food resources that prevent competition.