Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea)
A total of 373 Symphodus tinca specimens were obtained from small-scale fisheries in January 2017 - December 2018 off Urla coasts (Izmir Bay), north-eastern Aegean Sea. The length and weight distribution of all S. tinca specimens ranged from 7.8 to 24.5 cm TL (mean: 14.4 ± 0.12) and from 6.6 to 209....
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Istanbul University Press
2024-10-01
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| Series: | Aquatic Sciences and Engineering |
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| Online Access: | https://dergipark.org.tr/en/download/article-file/4091206 |
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| author | Okan Akyol Gülnur Metin |
| author_facet | Okan Akyol Gülnur Metin |
| author_sort | Okan Akyol |
| collection | DOAJ |
| description | A total of 373 Symphodus tinca specimens were obtained from small-scale fisheries in January 2017 - December 2018 off Urla coasts (Izmir Bay), north-eastern Aegean Sea. The length and weight distribution of all S. tinca specimens ranged from 7.8 to 24.5 cm TL (mean: 14.4 ± 0.12) and from 6.6 to 209.3 g (mean: 43.2 ± 1.30), respectively. The female – male ratio was 1:0.41. The weight-length relationship parameters (a, b, r2 ) were calculated to be 0.0175, 2.9023 and 0.9629, respectively. The age of S. tinca was determined to be between 0 and V years. The von Bertalanffy growth parameters were L∞ = 39.06 ± 23.57 cm, K = 0.14 ± 0.14, and t0 = -1.77 ± 0.77. In addition, the Von Bertalanffy Growth Formula for length is given by the following equation: Lt = 39.06 [1 – e -0.14 (t + 1.77)]. Thus, the growth performance (Φ`) was estimated as 2.32. The values of mortality and exploitation rates of S. tinca are 1.015 (Z), 0.380 (M), 0.635 (F) and 0.626 (E), respectively. These results indicate that stocks of S. tinca in the Bay of Izmir are overexploited. |
| format | Article |
| id | doaj-art-6e619d1849984524b3e1281985882562 |
| institution | Kabale University |
| issn | 2602-473X |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Istanbul University Press |
| record_format | Article |
| series | Aquatic Sciences and Engineering |
| spelling | doaj-art-6e619d1849984524b3e12819858825622025-02-04T08:44:52ZengIstanbul University PressAquatic Sciences and Engineering2602-473X2024-10-0139425526010.26650/ASE202415209334Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea)Okan Akyol0https://orcid.org/0000-0001-7738-2156Gülnur Metin1https://orcid.org/0000-0001-5807-5839Ege University Faculty of FisheriesEge University Faculty of FisheriesA total of 373 Symphodus tinca specimens were obtained from small-scale fisheries in January 2017 - December 2018 off Urla coasts (Izmir Bay), north-eastern Aegean Sea. The length and weight distribution of all S. tinca specimens ranged from 7.8 to 24.5 cm TL (mean: 14.4 ± 0.12) and from 6.6 to 209.3 g (mean: 43.2 ± 1.30), respectively. The female – male ratio was 1:0.41. The weight-length relationship parameters (a, b, r2 ) were calculated to be 0.0175, 2.9023 and 0.9629, respectively. The age of S. tinca was determined to be between 0 and V years. The von Bertalanffy growth parameters were L∞ = 39.06 ± 23.57 cm, K = 0.14 ± 0.14, and t0 = -1.77 ± 0.77. In addition, the Von Bertalanffy Growth Formula for length is given by the following equation: Lt = 39.06 [1 – e -0.14 (t + 1.77)]. Thus, the growth performance (Φ`) was estimated as 2.32. The values of mortality and exploitation rates of S. tinca are 1.015 (Z), 0.380 (M), 0.635 (F) and 0.626 (E), respectively. These results indicate that stocks of S. tinca in the Bay of Izmir are overexploited.https://dergipark.org.tr/en/download/article-file/4091206east atlantic peacock wrassefishinglength-weightexploitationmediterranean |
| spellingShingle | Okan Akyol Gülnur Metin Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea) Aquatic Sciences and Engineering east atlantic peacock wrasse fishing length-weight exploitation mediterranean |
| title | Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea) |
| title_full | Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea) |
| title_fullStr | Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea) |
| title_full_unstemmed | Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea) |
| title_short | Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea) |
| title_sort | age growth and mortality rates of symphodus tinca osteichthyes labridae in izmir bay ne aegean sea |
| topic | east atlantic peacock wrasse fishing length-weight exploitation mediterranean |
| url | https://dergipark.org.tr/en/download/article-file/4091206 |
| work_keys_str_mv | AT okanakyol agegrowthandmortalityratesofsymphodustincaosteichthyeslabridaeinizmirbayneaegeansea AT gulnurmetin agegrowthandmortalityratesofsymphodustincaosteichthyeslabridaeinizmirbayneaegeansea |