Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Effect on lake fishery and some biological characters of the sand smelt, (Atherina boyeri Risso, 1810) introduced to Karacaoren I Dam Lake (Turkey).

Abstract

This study was conducted in Karacaoren I Dam Lake between December 2009 and April 2010, which also covers the spawning period of sand smelt. In the study, the sex ratio, length and weight distributions, condition factor and length-weight relation of sand smelt were examined. A total of 513 sand smelt were caught with an electro-shocker. The sex ratio of the samples was found to be 1:1.24 in favour of male individuals. The total length of sand smelt ranged from 4.5 to 8.5 cm. It was determined that individuals with a length of 5.0-5.9 cm constituted the majority of the population. Individuals with an average weight of 0.80-1.6 g constituted the majority of the population. The value of average condition factor was found to be 0.673 for all individuals. The length-weight relation parameters were calculated as a=0.0096, b=2.7912, r2=0.8722 for all individuals and it was determined that the individuals exhibited negative allometry. A. boyeri's growth states under Karacaoren I Dam Lake conditions and their interactions with other fish species should be monitored periodically. In this way, invasive fish species can be kept under control, and necessary precautions can be taken to prevent their spread in our inland waters.