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Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.39 [2010] >
IJMS Vol.39(2) [June 2010] >
| Title: | Reproductive biology of Sardinella longiceps along Ratnagiri coast off Maharashtra |
| Authors: | Deshmukh, A V
Kovale, S R
Sawant, M S
Shirdhankar, M M
Funde, A B |
| Keywords: | Sardinella longiceps
Length-weight relationship
Gonadosomatic index
Maturity
Ratnagiri |
| Issue Date: | Jun-2010 |
| Publisher: | CSIR |
| Abstract: |
Indian oil sardine Sardinella longiceps is a highly migratory fish with large scale
shoaling along the coast of Ratnagiri. Length weight relationship equations analysed for
males were W = 0.0350 L2.4918 females were W = 0.0536 L2.3410,
indeterminants were W = 0.0200 L2.7021 and for combined sexes were W
= 0.0321 L2.5225 indicating no significant difference between the
sexes of S. longiceps. Average GSI
values of females were 1.4998 with maximum GSI value 5.4962 in the month of
September and minimum (0.4299) GSI value in the month of October. In males the
maximum GSI value 4.4962 were observed in the month of September and minimum
GSI value 0.2992 were observed in the month of October. Observations reveal
that spawning in S. longiceps
generally takes place only once in a year. Females were always more in number
with an average ratio of 1 male:1.1549 females with highest ratio in the month
of January. Size at maturity varied from 16 to 20 cm, with occurrence of well
developed mature gonads in the months of August-September and spent ones in the
months of November to February. Number of mature eggs in the ovaries of the
gravid females with the total weight of fish ranging from 50-60 kg varied from
45,000-75,000.
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| Page(s): | 274-279 |
| ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
| Source: | IJMS Vol.39(2) [June 2010]
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