TY  - JOUR
T1  - Gillnet selectivity for non target fish species caught by red mullet gillnets north Aegean Sea
TT  - Kuzey Ege Denizi’nde barbun uzatma ağlarında yakalanılan hedef dışı türlerin seçiciliği
AU  - Daban, İsmail Burak
AU  - Kocabaş, Engin
AU  - Öztekin, Alkan
AU  - Ayaz, Adnan
PY  - 2018
DA  - September
DO  - 10.12714/egejfas.2018.35.3.12
JF  - Ege Journal of Fisheries and Aquatic Sciences
JO  - EgeJFAS
PB  - Ege University
WT  - DergiPark
SN  - 2148-3140
SP  - 319
EP  - 326
VL  - 35
IS  - 3
LA  - en
AB  - The aim of thisstudy is to determine the effects of red mullet gillnets that commonly used inTurkish waters on sustainability of non target fish species. For these purpose,surveys were realized with 18 - 20 - 22 mm nominal bar length red mullet gillnetsbetweenDecember 2008 and May 2010 along the north Aegean Sea coasts (5-30 m). SELECTmethod was used with five different model (Normal location, normal scale,log-normal, gamma and bi-modal) for evaluating selectivity parameters of nontarget fish species. Selectivity models were determined as bi-modal for Serranus scriba and Symphodus tinca, log normal for Scorpaenaporcus and Spicara maena andgamma for Pagellus acarne. Optimumcatch lengths and spread values and selectivity curves were given for 5 species.Results showed that use of a largermesh size over the 22 mm mesh is important for ensuring stock sustainability ofthe non target fish species.
KW  - Gillnet
KW  - selectivity
KW  - optimum catch length
KW  - non target fish species
N2  - Bu çalışmada yaygınolarak kullanılan barbun uzatma ağlarının hedef dışı balık türlerininsürdürülebilirliğine olan etkisinin belirlenmesi amaçlanmıştır. Bu amaçla,kuzey Ege Denizi kıyılarında (5-30 m.) Aralık 2008 – Mayıs 2010 tarihleriarasında 18 – 20 – 22 mm göz genişliğine sahip barbun uzatma ağları iledenemeler gerçekleştirilmiştir. Hedef dışı türlerin seçicilik parametrelerinintespitinde 5 farklı model ile (normal location, normal scale, gamma, log-normalve bi-modal) SELECT tahmin metodu kullanılmıştır. Yakalanan çizgili hani veçırçır için bi-modal, iskorpit ve izmarit için log-normal, yabani mercan içinise gamma en uygun seçicilik modeli olarak belirlenmiştir. 5 tür için optimumyakalama boyları ve yayılım değerleri ile seçicilik eğrileri verilmiştir.Çalışma sonucunda barbun avcılığında kullanılan uzatma ağlarında ağ gözgenişliğinin 22 mm’nin üzerine çıkarılmasının ilgili türlerin stoksürdürülebilirliği bakımından önemli olduğu tespit edilmiştir.
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UR  - https://doi.org/10.12714/egejfas.2018.35.3.12
L1  - https://dergipark.org.tr/en/download/article-file/543853
ER  -