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Geo-spatial distribution and trends of trawl catch and bycatch off the south Konkan coast, Maharashtra, India

Regional Studies in Marine Science, ISSN: 2352-4855, Vol: 63, Page: 103022
2023
  • 3
    Citations
  • 0
    Usage
  • 12
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    3
  • Captures
    12
  • Mentions
    1
    • News Mentions
      1
      • News
        1

Most Recent News

New Findings from Dr. Rajendra Prasad Central Agricultural University in the Area of Marine Science Described (Geo-spatial Distribution and Trends of Trawl Catch and Bycatch Off the South Konkan Coast, Maharashtra, India)

2023 OCT 03 (NewsRx) -- By a News Reporter-Staff News Editor at Ecology Daily News -- Investigators publish new report on Science - Marine Science.

Article Description

Trawl fishing is well-known for its high catch rate, but due to its non-selective nature, it is now widely acknowledged to have an impact on biodiversity and habitat. The geographical and temporal aspects of trawl catch, bycatch, discard, and ichthyofaunal trawl diversity along the south Konkan coast of Maharashtra, India, are contemplated in the current study. The data of 177 georeferenced trawl hauls, towed between 15°53’38”N to 17°34’52”N latitude and 72°54’29”E to 73°25’48”E longitude, revealed that maximum bycatch (70–110 kg/haul) and discard (60–110 kg/haul) regions were found towards the southern direction, near ecologically sensitive estuarine areas off the south Konkan coast, Maharashtra. The post and pre-monsoon seasons were found to be much more productive in terms of catches, while the post-monsoon and winter seasons had the highest species diversity 38.15% and 33.86%, respectively, with the winter season having higher discard rates. In the present study, bycatch contributed nearly 49% of the total catch, with the maximum catch per hour recorded in October (62.20 kg) and the discard per hour in January (14.59 kg). There were 134 different species of fish and shellfish recorded, and the family Carangidae (8.21%) was prominent in terms of species richness, followed by Penaeidae (6.72%), Clupeidae (5.22%), Engraulidae (5.22%), and Sciaenidae (4.48%). The results of various biodiversity indices confirmed that the studied region is blessed with rich and evenly distributed biodiversity. The mapped predictive values of trawl fishing showed a high fishing pressure zone towards the south off the Maharashtra coast, and it highlighted the need for suitable strategies for the conservation and management of fisheries resources to achieve long-term sustainability in that region.

Bibliographic Details

Jaspreet Singh; S. K. Ahirwal; Kamal Sarma; A. K. Jaiswar; Latha Shenoy; Pranab Gogoi; U. R. Gurjar; R. Samanta

Elsevier BV

Agricultural and Biological Sciences; Environmental Science

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