The Effect of Mesh Size on Kilka Fish Catch Conical Lift Net in Babolsar Fishing Port

Abstract: The purpose of Present study was the effect of resizing of Mesh Size on lenght frequency and weight averages, frequency Kilka Fish Catch in Conical Lift Net May 1997 in Babolsar fishing port by four fishing vessels during 33 torrents at a depth of 50-40 m. After identifying the species caught, the total length and weight of the specimens were measured The results showed that in all 4 nets the highest percentage of fishing frequency was from 11.5 to 12.5 cm length range. length range 7.5 - 6.5 in 7 and 9 Mesh Size; . length range 8.5 - 7.5 in 9 Mesh Size; . length range 15.5 - 14.5 in . the length range Mesh Size 7 and 16.5 - 15.5 . the length range in Mesh Size Items 7, 8 and 9 were not observed . the length frequency distribution of common Kilka Catch by funnel net was similar to 4 different Mesh Sizes. there was no significant difference between the average length of common kilka Catch with different Mesh Sizes. And the highest frequency in 8mm Mesh Size with an average frequency of 954. the results showed a correlation between the Mesh size and the total length. No significant correlation was found between the Mesh size and total length of common Kilka. Indicates that the Mesh size of the fountain does not determine the total length.