Gökçeada (Kuzey Ege Denizi) Sığ Sularında Barbun (Mullus barbatus)'nın Büyüme, Günlük Yaş ve Yumurtadan Çıkma Frekansları

Öz

Barbun, Mullus barbatus'un erken yaşam tarihi, büyüme oranları ve yumurtadan çıkış dinamiklerinin beslenme habitatlarında anlaşılması, etkili balıkçılık yönetimi için gereklidir. Gökçeada (Kuzey Ege Denizi)'ndan Temmuz-Kasım 2013 tarihleri arasında toplanan 60 juvenil bireyin otolit günlük yaş okumalarından yararlanılarak, günlük yaş yapısı, bireysel büyüme oranları ve yumurtadan çıkış paterni belirlenmiştir. Otolit halka analizi, 71 ile 200 gün arasında değişen yaşları ve 4,7 ile 13,2 cm arasında vücut boylarını ortaya koymuştur. Büyüme, en iyi lineer model ile tanımlanmıştır (ortalama günlük büyüme oranı: 0,64 mm·gün⁻¹, R² = 0,87). Tahmin edilen yumurtadan çıkış tarihleri, ilkbaharda (Mart-Nisan) belirgin bir yoğunlaşma göstermiş ve bu durum senkronize üremenin ve beslenme habitatlarında hızlı juvenil büyümenin göstergesi olmuştur. Burada geliştirilen yaş-boy anahtarı, arazide basit boy ölçümlerinden yaş yapısının tahmin edilmesini mümkün kılmaktadır. Bu bulgular, Akdeniz'de M. barbatus için yayınlanmış üreme ve büyüme oranları ile uyumludur ve yerel stokların gelecekteki izlenmesi ve yönetimi için sağlam bir temel sağlamaktadır.

Anahtar Kelimeler

• Mullus barbatus
• otolit mikroyapısı
• günlük yaş
• günlük büyüme
• yumurtadan çıkma frekansı
• beslenme alanı
• Ege Denizi

Destekleyen Kurum

Bu çalışma Türkiye Bilimsel ve Teknolojik Araştırma Kurumu (TÜBİTAK) tarafından desteklenmiştir (proje no.: 112Y062).

Proje Numarası

This study was funded by The Scientific and Technological Research Council of Turkey (project no.: 112Y062).

Etik Beyan

Deney hayvanlarının bakımı ve kullanımı, Çanakkale Onsekiz Mart Üniversitesi Hayvan Deneyleri Yerel Etik Kurulu tarafından 2012/01-08 sayılı karar ile onaylanan hayvan refahı yasaları, yönergeleri ve politikalarına uygun olarak gerçekleştirilmiştir.

Growth, daily age, and hatching phenology of Red mullet (Mullus barbatus) in the shallow nursery grounds of Gökçeada Island (Northern Aegean Sea)

Öz

Understanding the early life history, growth dynamics, and hatching phenology of the red mullet (Mullus barbatus) within nursery habitats is essential for developing effective fisheries management strategies. In this study, daily age structure, individual growth rates, and hatching patterns were determined using otolith daily age measurements of 60 out of 63 juvenile fish collected from Gökçeada Island (North Aegean Sea) between July and November 2013. Otolith microstructure readings indicated that individuals ranged from 71 to 198 days old, corresponding to total lengths of 4.7-9.2 cm. Growth patterns were best described by a linear model, yielding a mean daily growth rate of 0.37 mm·day^-1 (R² = 0.91). Estimated hatching dates showed a clear spring concentration, with the majority of individuals (85%) hatching between March and May, and peak hatching occurring during March-April (67%). Overall, the findings are consistent with previously reported growth rates and phenology patterns for M. barbatus in the Mediterranean and provide a solid basis for future monitoring and management of local stocks.

Anahtar Kelimeler

• Mullus barbatus
• otolith microstructure
• daily age
• early growth
• hatching phenology
• nursery area
• Aegean Sea

Destekleyen Kurum

This study was funded by The Scientific and Technological Research Council of Turkey (project no.: 112Y062).

Proje Numarası

This study was funded by The Scientific and Technological Research Council of Turkey (project no.: 112Y062).

Etik Beyan

The care and use of experimental animals complied with Çanakkale Onsekiz Mart University, Animal Experiments Local Ethics Committee animal welfare laws, guidelines and policies as approved by 2012/01-08.

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