Population dynamics and yield estimation of Common Carp (Cyprinus carpio, Linnaeus, 1758) in Ayalew reservoir, Gamo Zone, Southern Ethiopia
Common carp (Cyprinus carpio) is an introduced fish species in Ayalew reservoir. This study provides the first results on fishery dynamics of the species in the reservoir. The study was aimed at estimating important population dynamics parameters and production potential. Total length (TL) and tota...
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Hawassa University
2023-04-01
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| Series: | East African Journal of Biophysical and Computational Sciences |
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| Online Access: | https://www.Ajol.Info/index.php/eajbcs/article/view/248700 |
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| author | Buchale Shishitu Shija Atnafu W/yohans Firew |
| author_facet | Buchale Shishitu Shija Atnafu W/yohans Firew |
| author_sort | Buchale Shishitu Shija |
| collection | DOAJ |
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Common carp (Cyprinus carpio) is an introduced fish species in Ayalew reservoir. This study provides the first results on fishery dynamics of the species in the reservoir. The study was aimed at estimating important population dynamics parameters and production potential. Total length (TL) and total weight (TW) data were collected from a total of 276 fish samples (141 females and 135 males). The obtained data were analyzed using FiSAT II software. Jones length-based cohort analysis model and length-based Thompson and Bell yield prediction models were employed to estimate the population and production potential. The mean total length was 26 cm and the dominant length groups ranged from 17 to 33 cm were 87%. The length-weight relationship parameters were (TW = 0.0565TL2.53, R2 = 0.95) and the condition factor K = 1.29. The parameters of von Vertalanffy growth curve were L∞ = 41 cm, k = 0.52, to = -2.29, θ = 2.9 and A0.95 = 5.5 years. The estimated values of the total, natural and fishing mortalities were Z = 1.23, M = 0.55 and F = 0.68, respectively. The current exploitation rate was 0.55 which indicates slightly overexploitation. The estimated fish population and the annual fish yield were 59,304 and 1.5 tons, respectively. However, investigation on reproductive biology, limnolocal aspects and stock enhancements should be required for the sustainability of these resources.
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| format | Article |
| id | doaj-art-48277f079c024143950fcd9cc7c03507 |
| institution | Kabale University |
| issn | 2789-360X 2789-3618 |
| language | English |
| publishDate | 2023-04-01 |
| publisher | Hawassa University |
| record_format | Article |
| series | East African Journal of Biophysical and Computational Sciences |
| spelling | doaj-art-48277f079c024143950fcd9cc7c035072025-02-08T19:51:02ZengHawassa UniversityEast African Journal of Biophysical and Computational Sciences2789-360X2789-36182023-04-0141Population dynamics and yield estimation of Common Carp (Cyprinus carpio, Linnaeus, 1758) in Ayalew reservoir, Gamo Zone, Southern Ethiopia Buchale Shishitu Shija0Atnafu W/yohans Firew1Fisheries and Aquaculture, Southern Agricultural Research Institute (SARI), Arba Minch Agricultural Research Center, P.O.Box 2228, Arba Minch, EthiopiaFisheries and Aquaculture, Southern Agricultural Research Institute (SARI), Arba Minch Agricultural Research Center, P.O.Box 2228, Arba Minch, Ethiopia Common carp (Cyprinus carpio) is an introduced fish species in Ayalew reservoir. This study provides the first results on fishery dynamics of the species in the reservoir. The study was aimed at estimating important population dynamics parameters and production potential. Total length (TL) and total weight (TW) data were collected from a total of 276 fish samples (141 females and 135 males). The obtained data were analyzed using FiSAT II software. Jones length-based cohort analysis model and length-based Thompson and Bell yield prediction models were employed to estimate the population and production potential. The mean total length was 26 cm and the dominant length groups ranged from 17 to 33 cm were 87%. The length-weight relationship parameters were (TW = 0.0565TL2.53, R2 = 0.95) and the condition factor K = 1.29. The parameters of von Vertalanffy growth curve were L∞ = 41 cm, k = 0.52, to = -2.29, θ = 2.9 and A0.95 = 5.5 years. The estimated values of the total, natural and fishing mortalities were Z = 1.23, M = 0.55 and F = 0.68, respectively. The current exploitation rate was 0.55 which indicates slightly overexploitation. The estimated fish population and the annual fish yield were 59,304 and 1.5 tons, respectively. However, investigation on reproductive biology, limnolocal aspects and stock enhancements should be required for the sustainability of these resources. https://www.Ajol.Info/index.php/eajbcs/article/view/248700Ayalew reservoir; Cohort analysis; Condition factor; Cyprinus carpio; Length-weight relationship; Population dynamics parameters |
| spellingShingle | Buchale Shishitu Shija Atnafu W/yohans Firew Population dynamics and yield estimation of Common Carp (Cyprinus carpio, Linnaeus, 1758) in Ayalew reservoir, Gamo Zone, Southern Ethiopia East African Journal of Biophysical and Computational Sciences Ayalew reservoir; Cohort analysis; Condition factor; Cyprinus carpio; Length-weight relationship; Population dynamics parameters |
| title | Population dynamics and yield estimation of Common Carp (Cyprinus carpio, Linnaeus, 1758) in Ayalew reservoir, Gamo Zone, Southern Ethiopia |
| title_full | Population dynamics and yield estimation of Common Carp (Cyprinus carpio, Linnaeus, 1758) in Ayalew reservoir, Gamo Zone, Southern Ethiopia |
| title_fullStr | Population dynamics and yield estimation of Common Carp (Cyprinus carpio, Linnaeus, 1758) in Ayalew reservoir, Gamo Zone, Southern Ethiopia |
| title_full_unstemmed | Population dynamics and yield estimation of Common Carp (Cyprinus carpio, Linnaeus, 1758) in Ayalew reservoir, Gamo Zone, Southern Ethiopia |
| title_short | Population dynamics and yield estimation of Common Carp (Cyprinus carpio, Linnaeus, 1758) in Ayalew reservoir, Gamo Zone, Southern Ethiopia |
| title_sort | population dynamics and yield estimation of common carp cyprinus carpio linnaeus 1758 in ayalew reservoir gamo zone southern ethiopia |
| topic | Ayalew reservoir; Cohort analysis; Condition factor; Cyprinus carpio; Length-weight relationship; Population dynamics parameters |
| url | https://www.Ajol.Info/index.php/eajbcs/article/view/248700 |
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