Publication Date:
2021-05-19
Description:
In order to study feeding and reproductive biology of Southern meager (A.hololepidotus) in North west of Persian Gulf. 143 (74 males and 69 females) species were collected between October of 2008 to October of 2009 in coast of Khouzestan. Maximum and minimum length of fish were 143 cm and 81 cm respectively Maximum mean length (128.4±7.5) and Minimum mean length (104.86±12.47) were detected in October and May respectively. Maximum weight (27.5Kg) and Minimum weight (5.7Kg) and also mean weight to males (15222±1371) and Min mean weight of females (16942/02±2095) were detected. Absolute fecundity (4111847.66) and relative fecundity (268.33) were analyzed. GSI Analysis showed that these species (A.hololepidotus) spawn during June to September with highest spawning rate in September. Results showed that Southern meager is a batch spawnerspecies relationship between length and weight of male Y=0.042L^2.70(n=74,R2 =0.86) and female species Y=0.061L^2.61(n=69, R2=0.85) and also total species Y=0.059L^2.62 (n=143, R2=0.86) were measured. Due to not finding Immature species during sampling LM50 wasn’t analyzed. Analysis HSI and K index showed highest value in April and May and lowest value in August and September respectively. Prey occurrence index showed that fish is main food item and Crustacean specially Shrimp and Mollusca are secondary food item of this species. Analysis of vacuity index showed that females of Southern meager are more gluttonous than males and this species feed during spawning season .In general we can classify Southern meager as a moderate feeding rate species.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Biology
;
Argyrosomus hololepidotus
;
Feeding
;
Reproductive
;
Meager
;
Species
;
GSI
;
Sampling
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
58pp.
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