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

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Relation http://eprints.cmfri.org.in/1992/
 
Title Long term trends in rainfall, sea level and solar periodicity: A case study for forecast of Malabar sole and oil sardine fishery
 
Creator Jayaprakash, A A
 
Subject Oil sardine
 
Description 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.
 
Publisher MBAI
 
Date 2002
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/1992/1/Jayaprakash_163-175.pdf
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.