Long term trends in rainfall, sea level and solar periodicity: A case study for forecast of Malabar sole and oil sardine fishery

Jayaprakash, A A (2002) Long term trends in rainfall, sea level and solar periodicity: A case study for forecast of Malabar sole and oil sardine fishery. Journal of the Marine Biological Association of India, 44 (1 & 2). pp. 163-175.

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Abstract

The fluctuations in abundance of a demersal fish, the Malabar sole (Cynoglossus macrostomus Norman) and a pelagic fish viz.,oil sardine (Sardinella longiceps) in the Malabar upwelling ecosystem (MUE) were analysed in relation to long-term trends in rainfall in Kerala, onset time of the southwest monsoon, sea level off Cochin and solar periodicity. The abundance of these species showed a clear decadal trend comparable to such trends existing in rainfall, sea level and solar periodicity. The variations in the rainfall showed a 35-year rhythm in its inten- sity. A fishery forecast of Malabar sole and oil sardine fishery has been attempted based these trends and is a posse ad esse. The fluctuations in abundance of oil sardine, beyond doubt, are dearly influenced by the trends in rainfall during southwest monsoon. Periods of good rainfall have positive effect on its abundance and vice versa. There appear to be a decadal or long-term trend in the productivity of the upwelling zone itself. The spawning, recruitment, survival, feeding, growth, migration and the abundance of various organisms are influenced by rhythms exiting in this large marine ecosystem of the southeastern Arabian Sea.

Item Type:Article
Uncontrolled Keywords:Malabar sole; Oil sardine; Cynoglossus macrostomus Norman; Sardinella longiceps
Subjects:Pelagic Fisheries > Oil sardine
Divisions:CMFRI-Cochin > Marine Capture > Pelagic Fisheries
ID Code:1992
Deposited By:Edwin Joseph
Deposited On:10 Aug 2010 16:14
Last Modified:10 Aug 2010 16:14

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