Publication Date:
2021-05-19
Description:
This Research has been done monthly in Sefidroud river and its tributaries from Agust 2003 to July 2004 . From the total number of 2027 specimens of caught fish , 800 and 629 were males and females respectively , and 598 specimens were undistinguished. Samples were caught by cast nets. Fork length range of all specimen was 33-255 mm (119.56 ±46) and their weight rang was 0.42-257.5 gr (34.4 ±39.06) gr and their age range was 0-5 (1.76 ±0.959) year. The avrege of relative frequency in C.c.gracilis was 65.1 % . The average of condition factor was 1.07±0.13 . Between Fork length and weight of C.c.gracilis . Was exponential relation and coefficient of correlation was estimated 99.11% . Growth cofficient (k) was 0.114 ; L∞ was estimated 373.5 mm. C.c.g consumed of Chrysophyta phylum more than other Phytoplankton phyla in Sefidroud river and from Bentic point of view, consumed of clay, Filamentous algae detritus, insects, seeds. Absolute fecundity range was 1823-9274 (4553.8 ±2169.1) eggs. Considering the GSI and frequency percent of maturity stages, spawning period of the fish begins from April and peak of spawning is in June and terminates in July.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Biology
;
Survey
;
Capoeta capoeta gracilis
;
Aquaculturize
;
Species
;
Specimens
;
Males
;
Females
;
Fish
;
Samples
;
Weight
;
C.c.gracilis
;
Growth
;
Chrysophyta phylum
;
Phytoplankton phyla
;
Filamentous algae detritus
;
GSI
;
Maturity
;
Spawning
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
96pp.
