Publication Date:
2021-05-19
Description:
The Caspian Sea is the biggest lacustrine water source. Common carp is very important commercially in south
coastal line of Iranian Caspian Sea waters, especially in east coastal line, because eighty percent annual catch of
this species has been caught in this area in particular. Despite the common carp importance and value in Iran, but
there is a little information about its biology in natural system.
This study is comprehensive research on reproduction, growth and feeding. The specimens were caught by beach
seine net in coastal line of Iranian waters. The fork length ranged between 5.6 and 2866.2 g. The b value of the
length-weight relationship ranged from 2.843 to 2.924 for female and male, respectively. The age composition of
the specimens was from 1 to 11 year. The gonadosomatic ratio (GSR) changed from 2 to 12. There were two
peaks of GSR in April and December, so that the latter peak was much shorter than the first that. Fecundity
variations were high and ranged 77448 to 430745 eggs. It observed linear significant correlation in fecundity- weight (r=0.98) and fecundity-length (r=0.88) relationships. Average growth in length was described with the
Von Bertalanffy growth model: L (t) = 60.5(1-exp (0.19(t-0.65). The percent of empty stomach and prey
dominant evaluated during different seasons by specific formula result showed that in Cyprinus carpio prey
Molluscs was dominated and specific food items. Empty stomachs in winter and spring were higher and lower, respectively.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Cyprinus carpio
;
Spawning
;
Feeding
;
Growth
;
Common carp
;
Biology
;
Age
;
Coastal line
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
51pp.
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