Aynur LOK, Gülnur METİN, Sefa ACARLI, Philippe GOULLETQUER

Harmful algal blooms (HABs) and black mussel mytilus galloprovincialis (Linnaeus, 1758) Culture in Izmir Bay (Iskele-Urla)-Turkey: preliminary results on the annual feeding cycle using a qualitative approach

Bu çalışma midyelerin filtrasyon kapasitesi dikkate alınarak partikül seleksiyonunun kalitatif belirlenmesi amacıyla yapılmıştır. Bu amaçla yıl boyunca su örneklemesi yapılmaksızın farklı boy gruplarındaki midyelerin mide içerikleri incelenerek tüketilmiş türler saptanmıştır. Farklı boy midyeler (1, 2, 3, 4, 5 cm) Urla-İzmir’deki balık kafeslerinin yüzdürücülerinden aylık olarak toplanmıştır. Mide içerikleri mikroskop altında incelenmiş ve farklı plankton türleri taksonomik olarak gruplanmıştır. Mide içeriğinde fitoplankton olarak Bacillariophycea, Dinophyceae, Oxyphceae, Euglenophyceae, zooplankton olarak Ciliata, Cladocera, Copepod, bivalve ve gastropod larvaları tespit edilmiştir. Bray-Curtis benzerlik testine göre örnekleme boyunca tüm farklı boy gruplarındaki midyelerin mide içerikleri, Ağustos ve Ekim ayı hariç benzerlik gösterdiği saptanmıştır.

Anahtar Kelimeler:

deniz suyu, mide, taksonomi, Türkiye, plankton

Zararlı alg patlamaları ve İzmir Körfezi’nde (İskele-Urla) kara midye mytilus galloprovincialis (Linnaeus, 1758) kültürü: kalitatif yaklaşımla yıllık beslenme döngüsü üzerine ilk sonuçlar

Considering the filtration capacity of mussels to qualitative particle selection, our study focused directly on ingested species by assessing mussel stomach content of various size classes (1-5 cm) over a year (August 97-June 98) rather than monitoring seawater samples. Different size of mussels (1, 2, 3, 4, 5 cm in length) was sampled monthly from the sides of fish cage floats in Urla-Izmir. Stomach contents were analyzed under microscope and different plankton species were grouped taxonomically. Bacillariophycea, Dinophyceae, Oxyphceae, Euglenophyceae as phytoplanktonic species were observed in the stomach contents of mussels as well as zooplanktonic species including Ciliata, Cladocera, Copepod, bivalve and gastropod larvae. Over the sampling period, according to the Bray-Curtis similarity test mussels’ stomach for all sizes was of similar content except in August and October.

Keywords:

sea water, stomach, taxonomy, Turkey, plankton,

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