Study of Some Growth Parameters of Spirlin (Alburnoides Eichwaldii), in Tilabad Stream of the Golestan Province

Document Type : Research Paper

Authors

1 Faculty of Fisheries, Gorgan University of Agricultral Sciences and Natural Resources, Iran

2 Inland Waters Aquatic Stocks Research Center- Gorgan, Iran

3 M.Sc. of Fisheries, Natural resources faculty, Guilan University, Iran

Abstract

In this study, the distribution, abundance and some growth parameters of Spirlin, Alburnoides
eichwaldii in the Tilabad stream in the Golestan province was studied over 2009-2010. A total
of 535 samples of Spirlins were collected by catching with Electroshocker. A total number of
205 samples was analyzed and the rest of the specimens were released. Spirlin was found only
in stations 1 and 2 (the Headstream and next station) while station 2 had the highest number
of summer Sprilin (0.889 # m-2). Catched fish were in three age-groups: 0, 1+, and 2+ years
old with the longitudinal range of 25.34-110.16 mm. The exponential relationship between
length and weight in both sexes indicated negative allometric growth. Growth equation was
Lt= 12.45(1-e-0.248(t+0.39)) and Lt= 11.66(1- e-0.281(t+0.39)) for females and males of
Spirlin, respectively. Apparently, Spirlinin in the Tialabad stream has no biotic suitability and
faces severe environmental stress.

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