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Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.39 [2010] >
IJMS Vol.39(3) [September 2010] >
| Title: | Spatial and temporal differences in the coastal fisheries along the east coast of India |
| Authors: | Vivekanandan, E
Krishnakumar, P K |
| Keywords: | east coast of India
coastal fisheries
spatial differences
Fishing Down Marine Food Web |
| Issue Date: | Sep-2010 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Annual average fish landings along the east
coast of India increased from 0.15 million tonnes during 1950-59 to 0.85 m t
during 2000-06. The contribution of the northeast coast (NE) to the total
landings along the east coast of India increased from 5.5% to 30.7% in the last
five decades. There were remarkable differences in the catch composition
between the NE and southeast (SE) coasts. Among the small pelagics, for
instance, the hilsa shad Tenualosa ilisha
and bombayduck Harpadon nehereus were
dominant along the NE coast, but the oil sardine Sardinella longiceps, lesser sardines and Indian mackerel Rastrelliger kanagurta along the SE
coast. Contribution of the fast growing, small-sized and low trophic level
hilsa had increased from 0.5% during 1950-59 to 12.5% during 2000-06 along the
NE coast, and the oil sardine (from 0.1% to 9.0%) and Indian mackerel (from
1.5% to 5.8%) along the SE coast. This has resulted in a decline in the mean
trophic level of the catch by 0.077 and 0.041 per decade during 1950-2006 along
the NE and SE coasts, respectively. This process of decline in the mean trophic
level of the catch is caused due to substantial increase in the landings of
species/groups that are low in trophic level, such as the small pelagics (oil sardine
and hilsa), and penaeid and non-penaeid shrimps over the years. |
| Page(s): | 380-387 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
| Source: | IJMS Vol.39(3) [September 2010]
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