Remotely sensed chlorophyll: a putative trophic link for explaining variability in Indian oil sardine stocks

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dc.contributor.authorGeorge, G.
dc.contributor.authorMeenakumari, B.
dc.contributor.authorRaman, M.
dc.contributor.authorKumar, S.
dc.contributor.authorVethamony, P.
dc.contributor.authorBabu, M.T.
dc.contributor.authorVerlecar, X.
dc.date.accessioned2013-12-10T04:42:26Z
dc.date.available2013-12-10T04:42:26Z
dc.date.issued2012
dc.description.abstractThe landing of Indian oil sardine, Sardinella longiceps Valenciennes, 1847 along the southwest coast of India is highly variable. A few physical parameters and processes correlated with sardine landing could not establish a flawless connection, and explain the phenomena of inter-annual variability.Earlier researchers indicated that the probable appearance and disappearance of sardine is an active movement in search of food and congenial conditions. But, no specific study has been carried out to explain the variability of sardine catch based on chlorophyll availability on a synoptic scale. An attempt is made in this study to correlate variability in chlorophyll-a with sardine landings along thewaters of southwest coast of India. We have estimated monthly averaged surface phytoplankton biomass along the waters of southwest coast of India from the shorelineupto 200 m isobath for ten years from SeaWiFS ocean colour data. This estimation is compared with the biological calendar of Indian oil sardine. The average chlorophyll-a for the bloom initiation month (1998-2006) matches very well with oil sardine landings. The results imply that the concentration of chlorophyll during the, bloom initiation month can be used to assess the quantum of fish that recruit into the population. Finer scale spatial variations in the chlorophyll along the coastal waters help in deciphering the migratory pattern of sardine during their active breeding phase. This study shows that 39% of interannual variability in fish landings is related to availability of chlorophyll-a during the bloom initiation month.en_US
dc.identifier.citationJournal Coastal Research 2012:28(1A), 105-113en_US
dc.identifier.urihttp://hdl.handle.net/123456789/889
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectUpwellingen_US
dc.subjectfisheriesen_US
dc.subjectocean colouren_US
dc.subjectphytoplanktonen_US
dc.subjectsouthwest coast of Indiaen_US
dc.titleRemotely sensed chlorophyll: a putative trophic link for explaining variability in Indian oil sardine stocksen_US
dc.typeArticleen_US
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