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Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.39 [2010] >
IJMS Vol.39(1) [March 2010] >
| Title: | Carapace width and weight relationships, condition factor, relative condition factor and gonado-somatic index (GSI) of mud crabs (Scylla spp.) from Chilika Lagoon, India. |
| Authors: | Mohapatra, Anil
Mohanty, Rajeeb K
Mohanty, Surya K
Dey, S K |
| Keywords: | Chilika lagoon
Scylla spp.
carapace width and body weight |
| Issue Date: | Mar-2010 |
| Publisher: | CSIR |
| Abstract: | Carapace width
(CW)-weight relationship, condition factor (K), relative condition factor (Kn)
and gonado-somatic index (GSI) for meaty and post-moulted crabs of both sexes
of the two mud crab species, Scylla
serrata (Forskal) and S.
tranquebarica (Fabricius) co-existing in Chilika lagoon, Orissa, India,
were studied during August, 2005 to July, 2007. CW-weight equations and
correlation co-efficient (r) obtained for both sexes of meaty and water crabs
of the two species were significant (P<
0.05-0.01). Regression slopes (b) were higher for males and fattened crabs in
both the species. The K and Kn values recorded in each month for different size
groups of both sexes of the two species were higher in male and values were
relatively higher in S. tranquebarica
than S. serrata. Increase in Kn
values beyond 1.0 from 81-91 mm CW in S.
serrata and 111-120 mm CW in S.
tranquebarica indicated the size at first maturity. Higher monthly values
indicated that breeding period was extended from August-November and March-July
in S. serrata and S. tranquebarica respectively.
Species-specific study aimed at establishing difference in biological
characters between two species of Scylla[a′] from same brackishwater habitat. CW-weight relationship may be
useful in setting feeding rates for a particular species in aquaculture. |
| Page(s): | 120-127 |
| ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
| Source: | IJMS Vol.39(1) [March 2010]
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