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NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
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Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.40 [2011] >
IJMS Vol.40(6) [December 2011] >
| Title: | Juvenile abundance and post-larval incursion of mud crabs (Scylla spp.) in Chilika lagoon |
| Authors: | Mohaptra, Anil
Mohanty, S. K.
Mohanty, Rajeeb K. |
| Keywords: | Chilika lagoon
Scylla spp.
Megalopa incursion
Juvenile abundance |
| Issue Date: | Dec-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | was carried out
on the juvenile abundance and post-larval incursion of two species of Scylla into the lagoon for period of two
years from August, 2005-July, 2007. Occurrence of juvenile, S. serrata were throughout the year, while in
S. tranquebarica, juveniles were not
encountered during December-February. December-May register higher median CPUE
values with peak in March for S. serrata. In S. tranquebarica, the peak juvenile abundance period was restricted
to June-September with peak in July. The CPUE values for juveniles indicted
that the recruitment was intense for S. serrata
during post-winter (January-April) and for S. tranquebarica
during monsoon (June-September). The crab
seeds were available throughout the year which gave a clear evidence for the
year round recruitment with the peak during the months of November-March for Scylla species from the Bay of Bengal to the Chilika lagoon. During the
study period, the megalopa and first crab instar recruitment per net-hour
collection was significantly higher during spring tides than neap tide phase
(p< 0.05) and also higher incursion was observed in the night hours than day
hours (p< 0.05). Significantly higher night collections of mud crab juveniles (mixed
population of both species) from net box traps (khandas) were obtained during
new moon phases (t=3.88; d.f.=11; P< 0.01).
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| Page(s): | 834-840 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
| Source: | IJMS Vol.40(6) [December 2011]
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