Distribution and Fishery of the Invasive Blue Crab (Callinectes sapidus) in Turkey Based on Local Ecological Knowledge of Fishers

Yıl 2021, Cilt: 6 Sayı: 3, 325 - 332, 28.09.2021

Fikret Öndes , Gökhan Gökçe

https://doi.org/10.35229/jaes.891379

Cited By: 4

Öz

This study provides information on the distribution and ecology of Callinectes sapidus in Turkey, as well as its maximum daily catch in set nets (trammel nets and gillnets), and its commercial fishery in lagoons. Data were collected in 2020 by utilizing a telephone based questionnaire survey. Responses were gathered from fishers (n = 6) who fish in the lagoons and the head of fishery cooperatives or its members (n = 104) in 28 cities, including the coastal regions of the Mediterranean Sea (Levantine), Aegean Sea, Sea of Marmara and the Black Sea in Turkey. Results indicated that C. sapidus is commonly distributed along the Levantine and Southern Aegean coasts of Turkey, whilst it is rarely observed in the Sea of Marmara and the Black Sea. It has been reported by fishers that this species has been seen in the Black Sea for the last decade. The maximum daily catch of blue crab in set nets showed a significant difference in the Levantine and Aegean coasts. The species is mainly produced in the lagoons, whereas many coastal fishers returned it as discard and 79% of fishers emphasized that C. sapidus shred the nets and caused an economic loss. Ovigerous females have been observed between March and October and we have discussed related management issues including current fishery season.

Anahtar Kelimeler

lagoon fishery, marine invasion, invasive species, Callinectes sapidus, fisheries management, local ecological knowledge

Destekleyen Kurum

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Proje Numarası

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Teşekkür

We would like to thank all participants of the questionnaire study. We also thank to Mrs Holly Aymelek and Dr Murat Aymelek for the language editing.

Balıkçıların Lokal Ekolojik Bilgilerine Göre İstilacı Mavi Yengecin (Callinectes sapidus) Türkiye’deki Dağılımı ve Balıkçılığı

Öz

Bu çalışma, Callinectes sapidus’un Türkiye’deki dağılımı, ekolojisi, uzatma ağlarındaki (fanyalı ve sade ağlar) günlük maksimum avı ve dalyanlardaki ticari balıkçılığı hakkında bilgi sağlamaktadır. Veriler, 2020 yılında yapılan telefon anketleri ile toplanmıştır. Dalyanlarda balıkçılık yapan 6 balıkçı ve Türkiye’nin Akdeniz, Ege, Marmara ve Karadeniz kıyılarını kapsayan toplam 28 ildeki su ürünleri kooperatifi başkanları ya da kooperatif üyeleri (örneklem sayısı = 104) anketleri cevaplamıştır. Bulgular, C. sapidus türünün Türkiye’nin Akdeniz ve Güney Ege kıyılarında yaygın olduğunu, Marmara ve Karadeniz kıyılarında ise nadiren gözlemlendiğini göstermiştir. Bu türün Karadeniz’de son 10 yıldır görüldüğü balıkçılar tarafından rapor edilmiştir. Uzatma ağlarındaki günlük maksimum yengeç avı Akdeniz ve Ege Denizi’nde anlamlı fark göstermiştir. Çoğu kıyı balıkçısı (%79), C. sapidus türünün ağları parçaladığını ve ekonomik kayba neden olduğunu belirtmiştir. Yumurtalı yengeçler Mart ve Ekim ayları arasında gözlemlenmiş olup, mevcut balıkçılık sezonu dâhil olmak üzere yönetim ile ilgili konular değerlendirilmiştir.

Anahtar Kelimeler

dalyan balıkçılığı, denizel istila, istilacı türler, Callinectes sapidus, balıkçılık yönetimi, local ekolojik bilgi

Proje Numarası

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Kaynakça

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