An investigation on the population parameters of freshwater crayfish (Pontastacus leptodactylus Eschscholtz, 1823) in Lake Yeniçağa (Bolu)
This study examines the monthly population parameters of Pontastacus leptodactylus in Lake Yeniçağa, including sex, length, and weight compositions, length-weight relationship, fecundity, morphometry, meat yield, and crayfish plague ratio. For this purpose, 641 crayfish were collected using fyke net...
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| Language: | English |
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Sciendo
2024-09-01
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| Series: | Fisheries & Aquatic Life |
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| Online Access: | https://doi.org/10.2478/aopf-2024-0015 |
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| author | Gençay İrem Sorguç Bura Uğur Saygı Yasemin |
| author_facet | Gençay İrem Sorguç Bura Uğur Saygı Yasemin |
| author_sort | Gençay İrem |
| collection | DOAJ |
| description | This study examines the monthly population parameters of Pontastacus leptodactylus in Lake Yeniçağa, including sex, length, and weight compositions, length-weight relationship, fecundity, morphometry, meat yield, and crayfish plague ratio. For this purpose, 641 crayfish were collected using fyke nets with a 34 mm mesh size. The females carrying eggs were observed between February and May. The female specimens carried between 103 and 841 eggs each, with a diameter ranging from 2.03 to 2.82 mm. The research revealed a size range of 80–168 mm and weight range of 15–133 g for crayfish specimens. As a result of regression analyses, the length-weight relationship was calculated as W = 0.0392L2.9148 for males and W = 0.0701L2.6139 for females. The population exhibited negative allometric growth based on the length and weight data. The evaluation of meat yield was based on the total meat yield, which comprises cheliped meat yield and abdomen meat yield. The study found that 14.35% of the P. leptodactylus population in Yeniçağa Lake was affected by crayfish disease. The results indicate that the P. leptodactylus population in Lake Yeniçağa has an overall healthy population structure, with a size suitable for fishing, and should be considered from an economic standpoint. |
| format | Article |
| id | doaj-art-992c6505802d48b5be47698165122b2a |
| institution | Kabale University |
| issn | 2545-059X |
| language | English |
| publishDate | 2024-09-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Fisheries & Aquatic Life |
| spelling | doaj-art-992c6505802d48b5be47698165122b2a2025-02-10T13:25:25ZengSciendoFisheries & Aquatic Life2545-059X2024-09-0132316617410.2478/aopf-2024-0015An investigation on the population parameters of freshwater crayfish (Pontastacus leptodactylus Eschscholtz, 1823) in Lake Yeniçağa (Bolu)Gençay İrem0Sorguç Bura Uğur1Saygı Yasemin21Biology Department, Faculty of Science, Hacettepe University, 06800Ankara, Türkiye1Biology Department, Faculty of Science, Hacettepe University, 06800Ankara, Türkiye1Biology Department, Faculty of Science, Hacettepe University, 06800Ankara, TürkiyeThis study examines the monthly population parameters of Pontastacus leptodactylus in Lake Yeniçağa, including sex, length, and weight compositions, length-weight relationship, fecundity, morphometry, meat yield, and crayfish plague ratio. For this purpose, 641 crayfish were collected using fyke nets with a 34 mm mesh size. The females carrying eggs were observed between February and May. The female specimens carried between 103 and 841 eggs each, with a diameter ranging from 2.03 to 2.82 mm. The research revealed a size range of 80–168 mm and weight range of 15–133 g for crayfish specimens. As a result of regression analyses, the length-weight relationship was calculated as W = 0.0392L2.9148 for males and W = 0.0701L2.6139 for females. The population exhibited negative allometric growth based on the length and weight data. The evaluation of meat yield was based on the total meat yield, which comprises cheliped meat yield and abdomen meat yield. The study found that 14.35% of the P. leptodactylus population in Yeniçağa Lake was affected by crayfish disease. The results indicate that the P. leptodactylus population in Lake Yeniçağa has an overall healthy population structure, with a size suitable for fishing, and should be considered from an economic standpoint.https://doi.org/10.2478/aopf-2024-0015pontastacus leptodactylusnarrow-clawed crayfishpopulation characteristicsmorphometrymeat yieldspawning characteristics |
| spellingShingle | Gençay İrem Sorguç Bura Uğur Saygı Yasemin An investigation on the population parameters of freshwater crayfish (Pontastacus leptodactylus Eschscholtz, 1823) in Lake Yeniçağa (Bolu) Fisheries & Aquatic Life pontastacus leptodactylus narrow-clawed crayfish population characteristics morphometry meat yield spawning characteristics |
| title | An investigation on the population parameters of freshwater crayfish (Pontastacus leptodactylus Eschscholtz, 1823) in Lake Yeniçağa (Bolu) |
| title_full | An investigation on the population parameters of freshwater crayfish (Pontastacus leptodactylus Eschscholtz, 1823) in Lake Yeniçağa (Bolu) |
| title_fullStr | An investigation on the population parameters of freshwater crayfish (Pontastacus leptodactylus Eschscholtz, 1823) in Lake Yeniçağa (Bolu) |
| title_full_unstemmed | An investigation on the population parameters of freshwater crayfish (Pontastacus leptodactylus Eschscholtz, 1823) in Lake Yeniçağa (Bolu) |
| title_short | An investigation on the population parameters of freshwater crayfish (Pontastacus leptodactylus Eschscholtz, 1823) in Lake Yeniçağa (Bolu) |
| title_sort | investigation on the population parameters of freshwater crayfish pontastacus leptodactylus eschscholtz 1823 in lake yenicaga bolu |
| topic | pontastacus leptodactylus narrow-clawed crayfish population characteristics morphometry meat yield spawning characteristics |
| url | https://doi.org/10.2478/aopf-2024-0015 |
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