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Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.39 [2010] >
IJMS Vol.39(2) [June 2010] >
| Title: | Seasonal variation in fishery diversity of some wetlands of the Salcete Taluka, Goa, India |
| Authors: | Fernandes, Brenda
Achuthankutty, C T |
| Keywords: | Coastal wetlands
Environmental factors
Fish fauna
Goa
Salcete Taluka
Species diversity |
| Issue Date: | Jun-2010 |
| Publisher: | CSIR |
| Abstract: |
Status of fishery potential of three coastal wetlands, Salcete Taluka viz.
Betul Assolna Velim wetland, Loutolim Raia Ambora wetland and Curtorim Macazana
wetland in relation to prevailing environmental parameters viz. surface water
temperature, DO, salinity and pH were examined. Twenty two species of fin
fishes of commercial importance were recorded during the study in the three
wetlands which showed seasonal variations in abundance. Average fish catch in
these wetlands ranged from 20 to 100
kg.day-1 comprising mainly of Etroplus spp (pearl spots), Sillago sihama (silver whiting), Mugil cephalus (grey mullet), Lutianus argentimaclatus (red snapper), Lates calcarifer (sea bass), Channos channos (milk fish) and Gerres spp. Average fish catch was
higher in Betul Assolna Velim wetland, followed by Loutolim Raia Ambora
wetland, and Curtorim Macazana wetland. During the monsoon and pre-monsoon
seasons, higher species diversity of fish was recorded at Betul Assolna Velim
wetland and Loutolim Raia Ambora Wetland compared to the Curtorim Macazana
wetland. Betul Assolna Velim wetland fishery also showed relatively higher
evenness values during all seasons. Cluster analysis showed species like Sillago sihama, Mugil cephalus, and Etroplus spp.
were recorded in all three wetlands in large numbers throughout the year while Johnius dussumeri and
Megalops cyprinoides appeared only during the post monsoon season in the
Curtorim Macazana wetland. Trichiurus
savala was absent during the post monsoon season in all the three wetlands.
Salinity appears to be a major factor influencing the abundance and diversity
of fin fish species in these wetlands. |
| Page(s): | 238-247 |
| ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
| Source: | IJMS Vol.39(2) [June 2010]
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