Journal of Marine Science and Technology

Journal of Marine Science and Technology

A survey of discard fish in Khuzestan fishery grounds (Khuzestan Coastal Waters)

Document Type : Original Manuscript

Authors
shafa hoveizavi 1
Babak Doustshenas 1
Gholamreza Eskandari 2
Ahmad Savari 1
Hossein Mohammadasgari 3
1 Department of Marine Biology, Faculty of Marine and Oceanic Sciences, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran.
2 South Aquaculture Research Center, Ahvaz, Iran.
3 Department of Environment, Faculty of Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran.
10.22113/jmst.2016.14845
Abstract
The main purpose of this study was to describe and estimate the seasonal pattern of discard fish in the waters of the Persian Gulf coasts in Khuzestan. sampling was carried out Monthly by using fishing boats in the waters of Khuzestan province for one year in fishing areas of Lifeh, Boseif, Khure-mussa and Bahrakan.Discard fish samples were included 61 species from 37 families, nearly 39 percent commercial and 61 percent of non- commercial species. Rayfish and catfish have been observed in most fishing nets. Average size of most species particularly bony fish were under 15 cm. The amount of discard fish per unit of fishing effort is not significantly different between seasons. The highest portion of the catch belongs to Rayfishes. Total discard fishes of gillnets were estimated 3162 tones. Total weight of commercial fishes with small size in trash fish was estimated 225 tones. The rate and proportion of discard fish in total catch of gillnet was estimated 0.23 and 0.31 respectively. Chondrichthyes with 12 species and 60% of gillnet catch has the highest percentage of discard fish of gillnet. A large number of commercial species with small size such as Otolithes ruber (Schneider, 1801), ( Scomberomorus commerson (Lacepede, 1801) and Scomberoides commersonnianus(Lacepede, 1801) could be due to the role of nursery grounds in Khuzestan coastal waters.
Keywords
By catch
discard
Gill net
Northwest Persian Gulf

Subjects

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  • Receive Date 27 December 2015
  • Revise Date 07 April 2016
  • Accept Date 10 May 2016
  • Publish Date 23 October 2017