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- W2912668050 abstract "Understanding the link between physical oceanographic events and seasonality in catchcomposition is a critical component in the accurate assessment of climate change impacts incontext of fisheries. This remains elusive owing to the lack of synoptic-level datasets on the relevantoceanographic variables. The advent of satellite remote sensing that can measure oceanographicvariables at high spatial and temporal resolution has helped to address this challenge. Prior studieshave communicated the puzzling dominance of carnivores (fish groups) in North East Arabian Sea(NEAS) whereas planktivores appear to thrive in South East Arabian Sea (SEAS). The study attemptsto address this conundrum by taking cues from the influence of oceanographic forcing upon seasonaltrends in catch composition using remotely-sensed oceanographic variables and mean standardizedcatch. The anoxic conditions associated with intense seasonal upwelling in SEAS waters leads to thereduction in the vertical extent of demersal carnivore habitats. The demersal habitats in NEAS watershave a higher likelihood of entraining oxygen rich (>0.5 ml/L) water column when compared withits southern counterpart especially from August to November. Moreover, NEAS waters cater to thenutritional requirements of juvenile demersal carnivore population as it supports primary productionboth during summer and winter monsoon months. The perpetual presence of chlorophyll biomassallows for the persistence of a prey base that maximizes the likelihood of demersal adult populationbeing well-fed. The poleward directed West India Coastal Current facilitates the passive drift ofjuveniles towards productive and oxygen rich habitats in NEAS waters. For demersal/pelagiccarnivores that undergo recruitment over a long span of time (> 6 months), NEAS waters providethe best spawning ground capable of meeting their long-term nutritional demands. Pelagicplanktivores thrive in SEAS, where seasonal upwelling supported primary production remains thenorm, owing to their relatively short recruitment span (< 4 months). Unlike SEAS, NEAS waters arefound to provide suitable environment geared towards the successful larval recruitment, sustenanceand survival of the demersal carnivore group. This could act as a forcing function in driving theannual catch composition of landing data registered in NEAS waters toward carnivore spectrum." @default.
- W2912668050 created "2019-02-21" @default.
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- W2912668050 date "2018-01-01" @default.
- W2912668050 modified "2023-09-24" @default.
- W2912668050 title "How oceanography influences Fishery Biology?- A Case of distribution differences incarnivorous and planktivorous fishes along theCoastal Waters of Eastern Arabian Sea In: ICAR Sponsored Winter School on Recent Advances in Fishery Biology Techniques for Biodiversity Evaluation and Conservation, 1-21 December 2018, Kochi." @default.
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