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All Journal AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment)
Mohamed, Abdul-Razak
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Education Energy Environmental Science

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Stock predictions and virtual population analysis of three invasive fish species in the Shatt Al-Arab River, Iraq Mohamed, Abdul-Razak
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 6 No. 2 (2022)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v6i2.91

Abstract

Carassius auratus, Oreochromis aureus and Coptodon zillii are invaded fish in the Iraqi waters and are well established and considered one of the dominant species in different natural waters of the country. The stock predictions and virtual population analysis of these species in the Shatt Al-Arab River were studied from November 2015 to October 2016 using the FiSAT II software. A total of 1,511 individuals of C. auratus, 1,353 O. aureus and 1,285 C. zillii were measured to analyze the length-frequencies. The growth was positive allometric for all species. The asymptotic length (L?) was computed as 21.2, 27.0 and 29.3 cm for C. auratus, O. aureus and C. zillii, respectively. The rates of total mortality (Z), fishing (F), natural (M) and exploitation (E) for C. auratus were 2.69, 1.09, 1.60 and 0.59, O. aureus 2.49, 1.08, 1.41 and 0.57 and C. zillii 1.51, 0.84, 0.68 and 0.45, respectively. The present exploitation rates (E) for O. aureus and C. zillii are lower than the biological target reference points for both species expressing a case of under-exploitation of both species, while C. auratus was operating nearby the exploited situation. Virtual population analysis (VPA) showed that the maximum fishing mortality for the three species occurred in the mid-lengths, with maximum values at the length of 16 cm for C. auratus and O. aureus and 15 cm for C. zillii. Therefore, the present study proposes that more yields can get through increasing the fishing activities on these invasive species, such as increasing the number of fishing boats and decreasing the mesh size to decline their abundances in the long term.
Evaluation of the inland fisheries in Basrah Province during 2020-2021, Iraq Mohamed, Abdul-Razak; Abood, Abdullah N.
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 7 No. 2 (2023)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v7i2.255

Abstract

The purpose of the study was to provide up-to-date information on inland fisheries landings in Basrah province, Iraq. During 2020-2021, the species composition, species and total landings, and trends at six landing locations in the research region were assessed. There were seven species of cyprinids, three species of cichlids, three species of mullet, and two species of sparids and silurids. The foreign species C. carpio, tilapias species, and C. auratus dominated landings, accounting for 44.2% of the entire catch. In contrast, the highly prized native species (M. sharpeyi, L. xanthopterus, C. luteus, and A. grypus) accounted for just 12.4%. In 2020 and 2021, the total landings reached 2,427.78 t and 2,365.15 t, respectively, greater than the previous years since 2009. This is attributable to the frequency of alien species and the rise in fishing effort, as measured by the number of fishermen and fishing vessels. Improving inland fisheries requires enhancing the stocks of native species, minimizing the dissemination and impacts of some exotic species, and activating national regulations governing fishing, exploitation, and conservation of aquatic life from the fisheries management perspective.
Co-Authors Abood, Abdullah N.