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Juvenile abundance and post-larval incursion of mud crabs ( Scylla spp.) in Chilika lagoon
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mohaptra, Anil Mohanty, Sujan Kumar Mohanty, Rajeeb Kumar |
| Copyright Year | 2011 |
| Abstract | Study 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 JuneSeptember 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). |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://nopr.niscair.res.in/bitstream/123456789/13271/1/IJMS%2040(6)%20834-840.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
