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Journal of the Marine Biological Association of India
Spatio-temporal pattern of clupeids and the changes in quality of Coilia dussumieri caught off Gujarat coast, India
The present study is the analysis and visualization of the spatiotemporal distribution of clupeids caught in both single day and multiday trawls off Gujarat coast summarized by using Geographic Information System (GIS). In multiday trawl, clupeids showed almost same abundance round the year, but the peak catch was in nearshore waters off Gujarat in winter followed by post-monsoon and pre-monsoon, whereas in single-day trawl, the highest abundance occurred immediately after the monsoon ban at 10 to 30 m depth zone.The catch quality of the clupeid (Coilia dussumieri, Valenciennes, 1848) was determined by using the standard method of sensory, biochemical, and microbiological quality parameters for Zero, fifth, tenth, and fifteenth day of storage in the trawl hull for both single day and multiday trawler to know the optimum time period of storage for safe human consumption. The Total Volatile Base – Nitrogen (TVBN) of muscle was 19.13 ± 0.81 mg N/100g and 35.28 ± 0.37 mg N/100 g at 0thday and 15th day respectively which indicates the acceptability limit to 15th day. The shelf life of C. dussumieri stored in ice as determined by overall acceptability sensory scores, bio-chemical quality and microbial data is 15 days.
Clupeid, multi-day trawler, Geographic Information System (GIS), catch
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