Biological Data Derived from Sturgeon (Acipenser stellatus, Acipenser gueldenstaedtii and Huso huso) by-Catch along the Coasts of the Southern Black Sea (Turkey)

Year 2013, Volume: 13 Issue: 4, - , 01.08.2013

Mustafa Zengin Aysun Gümüş Murat Dağtekin Şirin Firidin

https://doi.org/10.4194/1303-2712-v13_4_20

Abstract

In this study, some basic bio-ecological features such as growth, reproduction and feeding of three sturgeon species (Acipenser stellatus, Acipenser gueldenstaedtii and Huso huso) are presented. The mean and range of total length were recorded as 57.3 (17.0–143.0) cm for A. stellatus, 58.9 (29.0–200.0) cm for A. gueldenstaedtii and 82.2 (33.0–359.0) cm for Huso huso. The mean and range of total weight were 2121.4 (42–16,000) g, 4073.8 (100–35,000) g and 49,090.4 (128–353,000) g for the three species, respectively. The value ‘b’, a basic parameter of the length-weight relationship was estimated as 2.09 for A. stellatus, 2.95 for A. gueldenstaedtii and 3.51 for Huso huso. Analysis of stomach contents revealed that the sturgeons fed mostly on benthic and benthopelagic macrofauna along the southeastern Black Sea. Catches in the rivers as well as gonad development of fish caught in the vicinity of the estuaries indicated remaining fish still enter Yesilirmak and Sakarya for spawning. The spawning migration especially in the Yesilirmak occurs mainly in the period from April to June.

Keywords

Sturgeon species, bio-ecology, Southern Black Sea coasts.

Biological Data Derived from Sturgeon (Acipenser stellatus, Acipenser gueldenstaedtii and Huso huso) by-Catch along the Coasts of the Southern Black Sea (Turkey)

Abstract

Bu araştırmada; üç farklı mersin türünün (Acipenser stellatus, Acipenser gueldenstaedtii ve Huso huso) büyüme, üreme ve beslenme gibi bazı temel biyo-ekolojik özellikleri sunulmuştur. Ortalama boy ve dağılım aralığı sırasıyla; A. stellatus için 57,3 (17,0-143,0) cm, A. gueldenstaedtii için 58,9 (29,0-200,0) cm ve Huso huso için 82,2 (33,0-359,0) cm, olarak kaydedilmiştir. Bu üç tür için ortalama ağırlık ve dağılım aralığı ise türler için sırasıyla 2121,4 (42-16000) g, 4073,8 (10035000) g ve 49090,4 (128-353000) g olarak bulunmuştur. Boy-ağırlık ilişkisinin temel parametrelerinden olan ‘b katsayısı’ A. stellatus populasyonu için 2,09, A. gueldenstaedtii için 2,95 ve H. huso için ise 3,51 olarak hesaplanmıştır. Mide içeriği analizi, Güney Karadeniz sahili boyunca mersin balığı türlerinin büyük ölçüde bentik ve bentopelajik makrofauna üzerinden beslendiğini göstermektedir. Hem nehir ağızlarında yakalanan bireylerin gonad gelişimleri hem de nehirlerde elde edilen örnekler popülasyonun halen Yeşilırmak ve Sakarya nehirlerine yumurtlamak için girdiğini göstermektedir. Üreme göçleri, özellikle de Yeşilırmak üzerindeki, yoğun olarak Nisan-Haziran döneminde gerçekleşmektedir.

Keywords

Mersin balığı türleri, biyo-ekoloji, Güney Karadeniz kıyıları.

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