Survey on monthly variations catch per unit effort (CPUE) of Benthosema pterotum (Alcock, 1890) (Myctophidea) in Iranian waters of the Oman sea

The present study aimed to determine monthly variations catch per unit effort (CPUE) of Benthosema pterotum (Myctophidea) in Iranians waters of the Oman Sea. In this survey, more than 665 cases of hauling net were analyzed from April 2011 to march 2012. CPUE in different seasons were calculated as 937±45, 1002±51, 828±51 and 640±43 kg/h in spring, summer, autumn and winter, respectively. In terms of trawling time, CPUE was calculated as 1108±60 in 2-3, 802±31 in 3-4 and 732±40 kg/h in>4 hours range. Furthermore, CPUE was calculated for different trawling depth and represented 922±33 for 250m depth layers. According to daytime in daybreak, CPUE was calculated as 779±37, 987±42 in the middle of the day and 805±48 kg/h in afternoon. Nonparametric Kolmogorov-Smirnov test showed normal distribution of CPUE data. The ANOVA test showed significance different between CPUE in different seasons, trawling time, trawling depth and daytime (P