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Catch trends of bottom trawl fauna with an emphasis on prawns and stomatopods, off Goa, India

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Title Catch trends of bottom trawl fauna with an emphasis on prawns and stomatopods, off Goa, India
 
Creator Padate, V P
Can, A
Rivonker, C U
 
Subject Catch composition
Demersal
Fishing pressure
Marine
Temporal variation]
 
Description 766-775
Catch trends of bottom trawl fauna off Goa, India were investigated at fortnightly intervals from February 2006 – May
2008 with the exception of June – October months (monsoon). Inter-comparison of faunal abundance data obtained during
February to April months of 2006, 2007 and 2008 indicated that abundance during 2006 and 2008 were significantly higher
as compared to 2007. Available fish landing data for the region also corroborated this trend. The dominance of sub-adults
among stomatopods during post-monsoon season (November – January), juveniles and sub-adults among prawns during pre monsoon (February – May), indicated recruitment to the fishery. Comparison with 40-year-old published data indicated
significant reduction in the overall yield (P = 0.043; α = 0.05). Additionally, yields of 12 out of 15 fish groups across the
demersal trophic spectrum decreased significantly (P = 0.031; α = 0.05). However, catches of miscellaneous species
increased 17 times, and were dominated by pufferfishes. The profusion of pufferfish is attributed to the perennial breeding
habit of these fishes combined with increased removal of potential predators such as sharks and catfishes. Marine Trophic
Index (MTI) and Fishing-in-Balance Index (FiB) decreased at rates of 0.017 and 0.016 per decade, respectively, implying
that sustained fishing pressure over the next few decades could lead to potential trophic cascade and dominance of resilient
opportunistic species such as puffers.
 
Date 2023-06-07T09:16:35Z
2023-06-07T09:16:35Z
2023-06
 
Type Article
 
Identifier 2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscpr.res.in/handle/123456789/62019
https://doi.org/10.56042/ijms.v51i09.2336
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJMS Vol.51(09) [September 2022]