TY  - BOOK
AU  - 
AU  - 
ED  - 
ED  - 
ED  - Fisheries Resources and Ecological Assessment of Manila Bay 2012-2015. c2016. pp. 47-60
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SN  - 2
PY  - 2016///46
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KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Sex Ratio;Length at First Maturity;Spawning Season;Manila Bay
KW  - Gonadosomatic Index;Reproductive Biology
KW  - sears;sears0
N1  - Abstract :  Reproductive biology of the three dominant species (sardinella gibbosa, sardinella fimbriata and rastrelliger kanagurta) were studied in Manila Bay from January 2014 to December 2015. The Data were collected from landed catch ( coming from gillnet, liftnet, purse seine, ringnet and trawl) and during the actual trawl fishing survey. A total of 2,383 sardinella gibbosa, 2,334 sardinella fimbrita and 549 rastrelliger kanagurta were analyzed by pooling the two years data. The overall female to male ratio conformed to the expected 1:1 sex ratio. These species spawn throughout the year with major peak in March and April and minor peak in October to December for Sardinella Gibbosa; with major peak in February to May  and minor peak in October to December for Sardinella Fimbriata, and for Rastrelliger kanagurta, with major peak in October to December and minor peak in May and June. The GSI value correlate with the maturation of the gonads of these species. The length at maturity (Lm) was calculated at 12.75cm in males and 13.25cm in females for R. kanagurta; 5
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