Çanakkale Sığ Sularında Genç Mırmır, Lithognathus mormyrus (Linnaeus, 1758), Bireylerinin Beslenme Alışkanlıkları

Yıl 2011, Cilt: 1 Sayı: 3, 93 - 98, 30.09.2011

Hakan Ayyıldız , Özcan Özen Aytaç Altın Alkan Öztekin

Öz

Çanakkale sığ sularında (<2m) yapılan bu çalışmanın ana amacı, genç mırmır, Lithognathus mormyrus (Linneaus, 1758), bireylerinin beslenme alışkanlıklarının tespit edilmesidir. Bu amaçla, Ocak ile Aralık 2007 tarihleri arasında ığrıp örneklemeleri ile 6 farklı istasyondan elde edilen toplam boyları 33–125 ± 0.18 mm arasında olan 113 adet genç mırmır bireylerinin mide içerikleri incelenmiştir. Bu bireylerin 16 (%14.16) adetinin midesinde besinsel organizmaya rastlanılmamıştır. Toplam IRI değerlerine göre, genç mırmır bireylerinin ana besinlerinin copepod (%IRI = 91.19) olduğu ve diğer başlıca besin kaynaklarının da sırasıyla foraminifera (%IRI = %1.98), peracaridea (%IRI = %1.60), cumacea (%IRI = %1.50), amphipoda (%IRI = %0.75) ve mollusca (%IRI = %0.11) olduğu belirlenmiştir. Besin tercihlerinin mevsimsel olarak değişip değişmediğini tespit etmek amacıyla ANOSIM istatistik testi uygulanmış ve önemli derecede fark bulunamamıştır (ANOSIM: R = 0.24, P > 0.05).

Anahtar Kelimeler

Mırmır, beslenme, Çanakkale, genç bireyler, Lithognathus mormyrus

Feeding Habits of Young of the Year Striped Sea Bream, Lithognathus mormyrus (Linnaeus, 1758), from Canakkale Shallow Waters

Öz

The main purpose of this study was to determine feeding habits of young of the year striped sea bream, Lithognathus mormyrus (Linnaeus, 1758) from Canakkale shallow waters (<2m). With this purpose, stomach contents of 113 specimens, total length from 33 to 125 ± 0.18 mm, collected by beach seine from January to December 2007, from 6 different sampling locations, were analyzed. The overall percentages of empty stomachs were 14.16%. Based on the IRI analysis, among the main prey categories copepod (%IRI = 91.19) was the most preferred food group, followed by foraminifera (%IRI = %1.98), peracaridea (%IRI = %1.60), cumacea (%IRI = %1.50), amphipoda (%IRI = %0.75) and mollusca (%IRI = %0.11). No significant differences were found among the seasons (ANOSIM: R = 0.24, P > 0.05) in terms of nutrient preference.

Anahtar Kelimeler

Striped sea bream, nutrient, Çanakkale, young of the year, Lithognathus mormyrus

Kaynakça

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