Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea)

Gülnur Metin; Okan Akyol

Makale detayları

Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea)

Yazarlar:

Gülnur Metin | Okan Akyol

Yayıncı:

Istanbul University

Ana Başlıklar:

Hydrobiology

Dergi:

Aquatic Sciences and Engineering Vol.39 Issue 4, pp.255-260

Belge Tipi:

Makale

Yayın Tarihi:

10/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001331468

pISSN:

2602-473X

Anahtar kelimeler:

Özet:

 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.

 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.

 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.

 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.

Makale detayları

Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea)

Yazarlar:

Gülnur Metin | Okan Akyol

Yayıncı:

Istanbul University

Ana Başlıklar:

Hydrobiology

Dergi:

Aquatic Sciences and Engineering Vol.39 Issue 4, pp.255-260

Belge Tipi:

Makale

Yayın Tarihi:

10/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001331468

pISSN:

2602-473X

East Atlantic peacock wrasse

fishing

length-weight

exploitation

Mediterranean

Sayı

Makale detayları

Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea)

Yazarlar: Gülnur Metin | Okan Akyol

Yayıncı: Istanbul University

Ana Başlıklar: Hydrobiology

Dergi: Aquatic Sciences and Engineering Vol.39 Issue 4, pp.255-260

Belge Tipi: Makale

Yayın Tarihi: 10/2024

Belge Dili: İngilizce

Document ID (Org No.): 2001331468

pISSN: 2602-473X

East Atlantic peacock wrasse

fishing

length-weight

exploitation

Mediterranean

Sayı

Yazarlar:

Gülnur Metin | Okan Akyol

Yayıncı:

Istanbul University

Ana Başlıklar:

Hydrobiology

Dergi:

Aquatic Sciences and Engineering Vol.39 Issue 4, pp.255-260

Belge Tipi:

Makale

Yayın Tarihi:

10/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001331468

pISSN:

2602-473X