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|Title:||Deep-sea fishing for chondrichthyan resources and sustainability concerns— a case study from southwest coast of India|
|Authors:||Akhilesh, K. V.|
Pillai, N. G. K.
Bineesh, K. K.
Shanis, C. P. R.
|Abstract:||Elasmobranchs comprising sharks, skates and rays have traditionally formed an important fishery along the Indian coast. Since 2000, Indian shark fishermen are shifting their fishing operations to deeper/oceanic waters by conducting multi-day fishing trips, which has resulted in considerable changes in the species composition of the landings <i>vis- a-vis</i> those reported during the 1980’s and 1990’s. A case study at Cochin Fisheries Harbour (CFH), southwest coast of India during 2008-09 indicated that besides the existing gillnet–cum- hooks & line and longline fishery for sharks, a targeted fishery at depths >300-1000 m for gulper sharks (<i>Centrophorus </i>spp.) has emerged. In 2008, the chondrichthyan landings (excluding batoids) were mainly constituted by offshore and deep-sea species such as <i style="">Alopias superciliosus</i> (24.2%), <i style="">Carcharhinus limbatus </i>(21.1%), <i style="">Echinorhinus brucus</i> (8.2%), <i style="">Galeocerdo cuvier </i>(5.4%), <i style="">Centrophorus</i> spp. (7.3%) and <i style="">Neoharriotta pinnata</i> (4.2%) while the contribution by the coastal species<i style=""> </i>such as <i style="">Sphyrna lewini </i>(14.8%), <i style="">Carcharhinus sorrah</i> (1.4%) and other <i style="">Carcharhinus</i> spp. has reduced. Several deep-sea sharks previously not recorded in the landings at Cochin were also observed during 2008-09. It includes <i style="">Hexanchus griseus, Deania profundorum, Zameus squamulosus </i>and Pygmy false catshark<i style=""> </i>(undescribed)<i style=""> </i>which<i style=""> </i>have been<i style=""> </i>reported for the first time from Indian waters. Life history characteristics of the major fished species are discussed in relation to the fishery and its possible impacts on the resource.|
|ISSN:||0975-1033 (Online); 0379-5136 (Print)|
|Appears in Collections:||IJMS Vol.40(3) [June 2011]|
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