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Assessment of growth and mortality parameters and exploitation rate to monitor the population status of wild catfish, Pangasius nasutus (Bleeker, 1863) in Pahang River, Malaysia

Pangasius nasutus is one of the popular freshwater fish species in Pahang River, Malaysia because of its economic value, however, the high exploitation rate, occurrence of invasive alien species in the same ecosystem, and habitat modification threatened its population sustainability. This study aime...

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Autores Principales: Jaafar, Mohd Basid, Arshad, Aziz, Abd Ghaffar, Mazlan, Wong, Nur Leena Wai Sin, Mat Piah, Rumeaida
Formato: Artículo
Publicado: Iranian Society of Ichthyology 2023
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spelling oai:psasir.upm.edu.my:106741 http://psasir.upm.edu.my/id/eprint/106741/ Assessment of growth and mortality parameters and exploitation rate to monitor the population status of wild catfish, Pangasius nasutus (Bleeker, 1863) in Pahang River, Malaysia Jaafar, Mohd Basid Arshad, Aziz Abd Ghaffar, Mazlan Wong, Nur Leena Wai Sin Mat Piah, Rumeaida Pangasius nasutus is one of the popular freshwater fish species in Pahang River, Malaysia because of its economic value, however, the high exploitation rate, occurrence of invasive alien species in the same ecosystem, and habitat modification threatened its population sustainability. This study aimed to enhance the existing information database of a species that has limited data availability and to monitor its population status. The monthly samplings were conducted from the upstream to the downstream of the Pahang River for 12 consecutive months from May 2021 to April 2022. The FiSAT II software was used to analyse population parameters from the length frequency data. The results revealed the asymptotic length (Lˆž) = 661.50 mm, growth coefficient (K) = 0.18 year-1 , growth performance index (˜) = 4.90, the maximum age (Tmax) = 16.67, total mortality (Z) = 0.61 year-1 , natural mortality (M) = 0.25 year-1 , fishing mortality (F) = 0.36 year-1 and exploitation rate (E) = 0.59 year-1 . The results also showed that P. nasutus exhibits a slow growth rate, rendering it more susceptible to overfishing. This study also indicated that the current level of exploitation of P. nasutus population in the Pahang River appears to be appropriate. However, it is recommended that a precautionary strategy be adopted to mitigate the risk of overexploitation. Iranian Society of Ichthyology 2023 Article PeerReviewed Jaafar, Mohd Basid and Arshad, Aziz and Abd Ghaffar, Mazlan and Wong, Nur Leena Wai Sin and Mat Piah, Rumeaida (2023) Assessment of growth and mortality parameters and exploitation rate to monitor the population status of wild catfish, Pangasius nasutus (Bleeker, 1863) in Pahang River, Malaysia. International Journal of Aquatic Biology, 11 (4). 328 - 337. ISSN 2383-0956; ESSN: 2322-5270 https://ij-aquaticbiology.com/index.php/ijab/article/view/1997 10.22034/ijab.v11i4.1997
institution UPM IR
collection UPM IR
description Pangasius nasutus is one of the popular freshwater fish species in Pahang River, Malaysia because of its economic value, however, the high exploitation rate, occurrence of invasive alien species in the same ecosystem, and habitat modification threatened its population sustainability. This study aimed to enhance the existing information database of a species that has limited data availability and to monitor its population status. The monthly samplings were conducted from the upstream to the downstream of the Pahang River for 12 consecutive months from May 2021 to April 2022. The FiSAT II software was used to analyse population parameters from the length frequency data. The results revealed the asymptotic length (Lˆž) = 661.50 mm, growth coefficient (K) = 0.18 year-1 , growth performance index (˜) = 4.90, the maximum age (Tmax) = 16.67, total mortality (Z) = 0.61 year-1 , natural mortality (M) = 0.25 year-1 , fishing mortality (F) = 0.36 year-1 and exploitation rate (E) = 0.59 year-1 . The results also showed that P. nasutus exhibits a slow growth rate, rendering it more susceptible to overfishing. This study also indicated that the current level of exploitation of P. nasutus population in the Pahang River appears to be appropriate. However, it is recommended that a precautionary strategy be adopted to mitigate the risk of overexploitation.
format Article
author Jaafar, Mohd Basid
Arshad, Aziz
Abd Ghaffar, Mazlan
Wong, Nur Leena Wai Sin
Mat Piah, Rumeaida
spellingShingle Jaafar, Mohd Basid
Arshad, Aziz
Abd Ghaffar, Mazlan
Wong, Nur Leena Wai Sin
Mat Piah, Rumeaida
Assessment of growth and mortality parameters and exploitation rate to monitor the population status of wild catfish, Pangasius nasutus (Bleeker, 1863) in Pahang River, Malaysia
author_facet Jaafar, Mohd Basid
Arshad, Aziz
Abd Ghaffar, Mazlan
Wong, Nur Leena Wai Sin
Mat Piah, Rumeaida
author_sort Jaafar, Mohd Basid
title Assessment of growth and mortality parameters and exploitation rate to monitor the population status of wild catfish, Pangasius nasutus (Bleeker, 1863) in Pahang River, Malaysia
title_short Assessment of growth and mortality parameters and exploitation rate to monitor the population status of wild catfish, Pangasius nasutus (Bleeker, 1863) in Pahang River, Malaysia
title_full Assessment of growth and mortality parameters and exploitation rate to monitor the population status of wild catfish, Pangasius nasutus (Bleeker, 1863) in Pahang River, Malaysia
title_fullStr Assessment of growth and mortality parameters and exploitation rate to monitor the population status of wild catfish, Pangasius nasutus (Bleeker, 1863) in Pahang River, Malaysia
title_full_unstemmed Assessment of growth and mortality parameters and exploitation rate to monitor the population status of wild catfish, Pangasius nasutus (Bleeker, 1863) in Pahang River, Malaysia
title_sort assessment of growth and mortality parameters and exploitation rate to monitor the population status of wild catfish, pangasius nasutus (bleeker, 1863) in pahang river, malaysia
publisher Iranian Society of Ichthyology
publishDate 2023
_version_ 1819301703232520192
score 13.4562235

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