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Two Alien Species in the International Wetlands, Alma-Gol, Adji-Gol and Ala-Gol, of Golestann Province, Iran (A new record)

Rahman Patimar, Samad Igdrei, Babak Hamid-Sales and Shima Ba-Ensaf

Gorgan University Of Agricultural Sciences And Natural Resources, GORGAN, IRAN

THEME: ASFB

Variations in abundance and diversity of species were studied in the International Wetlands Alma-Gol, Adji-Gol and Ala-Gol, are located in the north of Iran (Latitude:37N, Longtitude:54E), during 2001. Two alien species, Himiculutre leucisculus Baslewski (1955) and Pseudorasbora parva Temminck & Schigelin Siebold (1842) were cought. Observation of these alien species is actullay the first record of their excistence in these areas. Both species were found in the wetlands all seasons. H.leucisculus included six age groups and P.parva included four age groups. Populations, inhibit the wetlands, showed differences in growth rate, condition factors, length distribution, length-weight relationship and in parameters of Von Bertalanffy growth equation. Based on GSI, The spawning peaks of H.leusisculus and P.parva were in March and April respectively. The sex ratio was 1:1 and smallest mature specimens were 2-years-old for both species. Inaddition, differences were observed in fecundity, facundity-length relationship and egg weight between female populations.