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  • 1
    Publication Date: 2021-05-19
    Description: The objective of the present study was classification of beach seine based on catch during the years 2009-2012. In the present study the catch of 123 beach seine in three provinces; Guilan, Mazandaran and Golestan, for each effort and species (Rutilus frisii kutum, Liza spp., Cyprinus carpio, Rutilus rutilus, Vimba vimba, Chalcalburnus chalcoides, Shads, Aspius aspius, Barbus sp, Abramis brama, Stizostedion lucioperca, Salmo trutta caspius, Esox lucius and Silurus glani) were used as input data. According to the results, among catch of 14 species/groups, kutum represented the highest proportion of total catch at 66.24%, followed by mullet, carp and shads with 27.42.81, 1.31 and 4.26% of total catch. Applying complete linkage, a hierarchical cluster analysis, the 123 beach seines were grouped into 3 individual clusters. First cluster was included 8 and second and third clusters were included 25 and 90 beach seines, respectively. Third cluster had lowest catch and these beach seines located in east and west coastline of Iranian water of the Caspian Sea.
    Description: Published
    Keywords: Rutilus kutum ; Liza spp. ; Cyprinus carpio ; Rutilus rutilus ; Vimba vimba ; Chalcalburnus chalcoides ; Alosa spp. ; Aspius aspius ; Barbus sp. ; Abramis brama ; Stizostedion lucioperca ; Salmo trutta caspius ; Clustering ; Bonyfishes ; Catch ; Beach seine ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.61-68
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  • 2
    Publication Date: 2021-05-19
    Description: Caspian Kutum (Rutilus frisii kutum, Kamensky 1901) is among the main commercial species in the Caspian Sea. The present study aimed to determine the spatial and temporal distribution patterns of Kutum in depth ranges of 10 to 100 m by bottom trawl net in Iranian waters of the Caspian Sea during 2008 to 2010. The results showed that the maximum catch and CPUE were 2903 kg and 57.08 kg/0.5 h in winter 2009. The minimum catch and CPUE were 79 kg and 1.41 kg/0.5 h in spring 2010. During the warm seasons (spring and summer) most Kutums occurred in depths less than 20 m. While, during cold seasons they occurred at all depths. The average (±SE) CPUE was 94.0 ± 78.53 kg/0.5 h in depths 20-50 m in autumn and 128.3 ± 77.64 kg/0.5 h in depths 〉50 m in winter.
    Description: Published
    Keywords: Caspian Kutum ; Rutilus frisii kutum ; Distribution ; Density
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.63-75
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