• Corpus ID: 107869787

Age growth mortality yield per recruit and stock assessment of Atropus atropus (Bloch and schneider)

@inproceedings{Kasim1999AgeGM,
  title={Age growth mortality yield per recruit and stock assessment of Atropus atropus (Bloch and schneider)},
  author={H. Mohamad Kasim},
  year={1999}
}

• H. Kasim
• Published 1999
• Biology

Age and growth. mortality rates, yield per recruit and the stock asessnlent of Atropus atropus have been studied from the length frequency data
collected from trawlnet landings during 1981-84. The L = K and to have been estimated to be 453 mm, 1.1430 (annual basis) and -0.0390 yr
respectively. This species attains a fork length of 214, 321. 378 and 412 mm in 0.5.1.0.1.5 and 2.0 years respectively. The length-weight
relationship of this species is described by the linear regression equation Log W = -1.7 1 16 + 2.8980 Log L (r = 0.9790). The total mortality rates
(Z) by trawlnet increased progressively from 5.53 in 1981-82 to 8.97 in 1983-84 with annual average of 6.45. The natural mortalityr ate (M) is
estimated to be 1.76. Higher fishing mortality rates and exploitation rates indicate that this species was exposed to high fishing pressure by
trawlnet suggesting either a reduction in effort or an increase in tlie age at first capture. The average annual standing stock and average standing
stock were estimated to be 81.5 and 12.7 t respectively. The MSY was estimated to be 40.9 t for this species.