Investigation of the distribution and bio-ecological features of gambusia (mosquitofishes) species in Turkey

In this study, it was aimed to investigate the distribution in Turkey, morphological and meristic characteristics, length-weight relationships, habitat preferences, and reproductive characteristics of mosquitofish, which are considered as a threat especially for endemic species' persistence. During the study, a total of 130 different stations were investigated in Turkey. G. holbrooki specimens were found in total of 67 stations, including 28 rivers and 39 lakes. Female:male ratio was found as 1: 0,40 in all individuals. The total length ranged from 1.27 to 57.2 mm. The number of dorsal, anal and caudal fin rays were found as 7-8, 8-9, 20-22, respectively. Ten different morphometric features were investigated according to stations. Length-weight relationships of females and males were found as W=0.0101 L3.2281, r=0.982 and W=0.01121 L2.9811, r=0.944. Pregnant individuals in different localities were examined and the maximum number of egg and embrio were deterimined as 182. Anahtar Kelimeler: Gambusia holbrooki, mosquitofish, morphometry, bioecology, invasive species, ecological impact, endemic species.