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dc.contributor.authorSankaranarayanan, V.N.
dc.contributor.authorQasim, S.Z.
dc.date.accessioned1993-12-08T09:56:27Z
dc.date.accessioned2017-09-29T13:47:25Z
dc.date.available1993-12-08T09:56:27Z
dc.date.available2017-09-29T13:47:25Z
dc.date.issued1968
dc.identifier.citationBulletin of National Institute of Sciences of India, vol.38; 1968; 846-853
dc.identifier.issn0027-9528
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/5990
dc.description.abstractFrom the seasonal changes in the hydrographical features of Cochin area during the year 1965-66, it is possible to deduce that a shore-ward influx of upwelled water occurs from about June to October The effect of this water is felt in very shallow areas During this period the bottom layers become cold, markedly saline, poorly oxygenated and rich in nutrients Minimum oxygen of less than 0.5 ml/L is recorded at 10 m in August The fish populations are not very abundant during this season and tend to avoid the oxygen-deficient water Both fish and prawn catches are poor from June to September The available evidences show that the enrichment of the euphotic zone with nutrients in the post-upwelling period produces an intense phytoplankton bloom The red-tide phenomenon which acts as a further threat to fish life is of common occurrence during this season From November onwards there is a reappearance of fish shoals in coastal waters and a resumption of large scale fishing activity
dc.languageen
dc.publisherNational Institute of Sciences of India
dc.relation.ispartofB Natl Inst Sci India
dc.relation.isreferencedbyNON-SCI
dc.subjectFisheries
dc.subject.otheralgal blooms
dc.subject.othereuphotic zone
dc.subject.otherabundance
dc.subject.othernutrients (mineral)
dc.subject.otherupwelling
dc.subject.otherhydrography
dc.subject.otherfisheries
dc.subject.otherISW, India, Kerala, Cochin
dc.titleThe influence of some hydrographical factors on the fisheries of Cochin area
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Kochi, Kerala, India


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