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Juvenile abundance and post-larval incursion of mud crabs (<i style="mso-bidi-font-style:normal">Scylla </i>spp.) in Chilika lagoon

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Title Juvenile abundance and post-larval incursion of mud crabs (Scylla spp.) in Chilika lagoon
 
Creator Mohaptra, Anil
Mohanty, S. K.
Mohanty, Rajeeb K.
 
Subject Chilika lagoon
Scylla spp.
Megalopa incursion
Juvenile abundance
 
Description 834-840
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).


 
Date 2011-12-24T09:07:42Z
2011-12-24T09:07:42Z
2011-12
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/13271
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.40(6) [December 2011]