Abundance and distribution of the nonconventional deep-sea finfish resources off the south-west coast of India (lat.7-10N)
| dc.contributor.advisor | Rajasekharan Nair, J | |
| dc.contributor.author | Sajeevan, M K | |
| dc.contributor.author | KAU | |
| dc.date.accessioned | 2019-06-14T10:20:38Z | |
| dc.date.available | 2019-06-14T10:20:38Z | |
| dc.date.issued | 2005 | |
| dc.description | PG | en_US |
| dc.description.abstract | Most of the conventional fishery resources of the continental shelves of the Indian EEZ are either optimally exploited or over exploited. Exploitation of the unexploited nonconventional finfishes will be a solution to meet the growing demand for fish in the country. The present study based on the exploratory fishing data of M.F.V. Matsya Varshini during the period of February 2004 to April 2005 indicates the presence of nonconventional finfish resources along the deeper waters (100-500 m) off the south west coast of India (70-100N lat.). 97 species belonging to 16 orders, 51 families, and 78 genera recorded during the study points to the rich diversity of nonconventional finfishes in the study area. Nonconventional finfishes formed 72% of the trawl catches obtained during the period under study. Distribution pattern and abundance of the nine species/species-groups are presented and discussed. Area-wise 70-80N lat. (200-500 m depth zone) has been found to be more productive and the abundance has shown a decreasing trend towards the northern latitudes. Results of the study confirm that bathymetric difference is the key factor for the distribution and abundance of deep-sea finfishes. Depth wise, the 200-300 m zone has been found to be more productive with a relative abundance of 1829.7 kg.h-1 of deep-sea finfishes. Trichiurus auriga with a relative abundance of 146.78 kg.h-1 dominated among finfishes, followed by Psenopsis cyanea with an average relative abundance of 144.38 kg.h-1. Existence of seasonal variation and difference of habits of the nonconventional finfishes have been observed during the study. Results of the length frequency studies carried out for seven important nonconventional finfish species are discussed. A standing stock of 98442.17 tonnes estimated for the nonconventional finfishes from the study area makes them a potential resource for commercial exploitation. Biomasses of the 9 species/species-groups of nonconventional finfishes estimated separately are also presented. Need of an organized survey of nonconventional deep sea finfishes covering the entire Indian EEZ by using different types of gears has been highlighted. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810108535 | |
| dc.keywords | Fishery biology, Biodiversity of deep sea fishes | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Department of Fishery Biology, College of Fisheries, Panangad | en_US |
| dc.sub | Fisheries | en_US |
| dc.subject | null | en_US |
| dc.theme | Abundance and distribution of the nonconventional deep-sea finfish resources | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Abundance and distribution of the nonconventional deep-sea finfish resources off the south-west coast of India (lat.7-10N) | en_US |
| dc.type | Thesis | en_US |