A per-recruit assessment of the kingfish (Scomberomorus commerson) resource of Oman with an evaluation of the effectiveness of some management regulations

A. Govender, H. Al-Oufi, J. L. McIlwain, M. C. Claereboudt

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The status of the kingfish resource of Oman has been assessed using a per-recruit model noting that there are differences in growth and mortality between the sexes (amongst other parameters). It is estimated that at the current fishing mortality rate the spawning biomass per-recruit for females is 16% and that of males is 27%, indicating that the fishery is overfished, with a high chance of recruitment failure in the future. A number of management scenarios, based on minimum size limits and closed seasons were evaluated for this fishery in order to determine which of the scenarios would increase spawning biomass per-recruit without compromising yield per-recruit harvest rates to levels which may lead to socio-economic hardship amongst fishers. It has been shown that closed seasons and minimum size limits may be the most effective current means of achieving these objectives and it is proposed that a closed season, coupled with a minimum size of 45 cm (FL) for both sexes, be implemented each year from the 1 March to 30 April. This would increase spawning biomass per recruit to 29% for females and 40% for males, when compared to an unfished state and over the long-term.

Original languageEnglish
Pages (from-to)239-247
Number of pages9
JournalFisheries Research
Volume77
Issue number2
DOIs
Publication statusPublished - Feb 2006

Fingerprint

Scomberomorus
Oman
spawning
biomass
resource
fishery
fisheries
mortality
gender
fishing mortality
socioeconomics
evaluation
regulation

Keywords

  • Kingfish
  • Narrow barred Spanish mackerel
  • Oman
  • Scomberomorus commerson
  • Scombridae
  • Yield per-recruit analysis

ASJC Scopus subject areas

  • Aquatic Science

Cite this

@article{c59688651fcd471a8c062d3b80747e8b,
title = "A per-recruit assessment of the kingfish (Scomberomorus commerson) resource of Oman with an evaluation of the effectiveness of some management regulations",
abstract = "The status of the kingfish resource of Oman has been assessed using a per-recruit model noting that there are differences in growth and mortality between the sexes (amongst other parameters). It is estimated that at the current fishing mortality rate the spawning biomass per-recruit for females is 16{\%} and that of males is 27{\%}, indicating that the fishery is overfished, with a high chance of recruitment failure in the future. A number of management scenarios, based on minimum size limits and closed seasons were evaluated for this fishery in order to determine which of the scenarios would increase spawning biomass per-recruit without compromising yield per-recruit harvest rates to levels which may lead to socio-economic hardship amongst fishers. It has been shown that closed seasons and minimum size limits may be the most effective current means of achieving these objectives and it is proposed that a closed season, coupled with a minimum size of 45 cm (FL) for both sexes, be implemented each year from the 1 March to 30 April. This would increase spawning biomass per recruit to 29{\%} for females and 40{\%} for males, when compared to an unfished state and over the long-term.",
keywords = "Kingfish, Narrow barred Spanish mackerel, Oman, Scomberomorus commerson, Scombridae, Yield per-recruit analysis",
author = "A. Govender and H. Al-Oufi and McIlwain, {J. L.} and Claereboudt, {M. C.}",
year = "2006",
month = "2",
doi = "10.1016/j.fishres.2005.08.010",
language = "English",
volume = "77",
pages = "239--247",
journal = "Fisheries Research",
issn = "0165-7836",
publisher = "Elsevier",
number = "2",

}

TY - JOUR

T1 - A per-recruit assessment of the kingfish (Scomberomorus commerson) resource of Oman with an evaluation of the effectiveness of some management regulations

AU - Govender, A.

AU - Al-Oufi, H.

AU - McIlwain, J. L.

AU - Claereboudt, M. C.

PY - 2006/2

Y1 - 2006/2

N2 - The status of the kingfish resource of Oman has been assessed using a per-recruit model noting that there are differences in growth and mortality between the sexes (amongst other parameters). It is estimated that at the current fishing mortality rate the spawning biomass per-recruit for females is 16% and that of males is 27%, indicating that the fishery is overfished, with a high chance of recruitment failure in the future. A number of management scenarios, based on minimum size limits and closed seasons were evaluated for this fishery in order to determine which of the scenarios would increase spawning biomass per-recruit without compromising yield per-recruit harvest rates to levels which may lead to socio-economic hardship amongst fishers. It has been shown that closed seasons and minimum size limits may be the most effective current means of achieving these objectives and it is proposed that a closed season, coupled with a minimum size of 45 cm (FL) for both sexes, be implemented each year from the 1 March to 30 April. This would increase spawning biomass per recruit to 29% for females and 40% for males, when compared to an unfished state and over the long-term.

AB - The status of the kingfish resource of Oman has been assessed using a per-recruit model noting that there are differences in growth and mortality between the sexes (amongst other parameters). It is estimated that at the current fishing mortality rate the spawning biomass per-recruit for females is 16% and that of males is 27%, indicating that the fishery is overfished, with a high chance of recruitment failure in the future. A number of management scenarios, based on minimum size limits and closed seasons were evaluated for this fishery in order to determine which of the scenarios would increase spawning biomass per-recruit without compromising yield per-recruit harvest rates to levels which may lead to socio-economic hardship amongst fishers. It has been shown that closed seasons and minimum size limits may be the most effective current means of achieving these objectives and it is proposed that a closed season, coupled with a minimum size of 45 cm (FL) for both sexes, be implemented each year from the 1 March to 30 April. This would increase spawning biomass per recruit to 29% for females and 40% for males, when compared to an unfished state and over the long-term.

KW - Kingfish

KW - Narrow barred Spanish mackerel

KW - Oman

KW - Scomberomorus commerson

KW - Scombridae

KW - Yield per-recruit analysis

UR - http://www.scopus.com/inward/record.url?scp=31344464216&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=31344464216&partnerID=8YFLogxK

U2 - 10.1016/j.fishres.2005.08.010

DO - 10.1016/j.fishres.2005.08.010

M3 - Article

VL - 77

SP - 239

EP - 247

JO - Fisheries Research

JF - Fisheries Research

SN - 0165-7836

IS - 2

ER -