Length-weight relationships, growth parameters, and condition factor of Sarda sarda from the Southern Black Sea

Year 2025, In Press Articles, 1 - 13

Yaşar Genç , Murat Dağtekin , Nimet Selda Başçınar , Elvan Tercan

https://doi.org/10.52998/trjmms.1528911

Abstract

The small tuna known as the Atlantic bonito (Sarda sarda) is one of the most important fishery species of the Black Sea coast of Türkiye. In this study, we sought to define some population parameters of Atlantic bonito based on indirect ageing using length frequency distributions. The aim of this study is to provide data that will serve the management of bonito fishery. For analysis, the ELEFAN routine in the LFDA and FiSAT programs was utilized. During the migration period, we collected 2110 samples from purse seine and gillnet fishing in the Black Sea waters of Türkiye. The fork length varied between 13.1 and 60 cm, and the female to male ratio was 1:0.79. The length-weight relationships (LWRs) were calculated W=0.0037FL3.3784 and Fulton’s K:1.01±0.001. The growth was found to be positive allometic (Student’s t-test, p < 0.05). von Bertalanffy Growth Parameters (VBGP) were computed as L∞:71.59 cm, K:0.56 year-1, t0:-0.18 year. The seasonal oscillation in growth rate was calculated (C: 0.98) and winter point (WP): 0.54, growth performance index of Ø’: 3.46, natural mortality (M: 0.74 yr-1), fishing mortality (F: 2.81 yr-1), total mortality (Z: 3.55 yr-1) and exploitation coefficient (E: 0.79 yr-1). As a result of it was found that the exploitation rate on the S.sarda along the Black Sea

Keywords

Sarda sarda, Black Sea, LFDA, ELEFAN, condition factor, growth parameters

Supporting Institution

TAGEM

Project Number

TAGEM/HAYSÜD/2006/09/02/02

Thanks

The General Directorate of Agricultural Research and Policies (GDAR) TAGEM/HAYSÜD/2006/09/02/02) provided funding for this work

Güney Karadeniz'de yayılış gösteren Sarda sarda'nın boy-ağırlık ilişkileri, büyüme parametreleri ve kondisyon faktörü

Abstract

Atlantik palamudu olarak bilinen küçük orkinoslardan Sarda sarda, Türkiye'nin Karadeniz kıyılarının en önemli balıkçılık türlerinden biridir. Bu çalışmada, boy frekans dağılımları kullanılarak boya dayalı olarak palamut balığının bazı popülasyon parametrelerini tanımlamaya çalışıldı. Bu çalışmanın amacı palamut balıkçılığının yönetimine hizmet edecek sonuçlar sağlamaktır. Çalışmada verilerin analizi için LFDA ve FiSAT programlarındaki ELEFAN rutini kullanıldı. Palamut balığının Türkiye'nin Karadeniz sularında göçü boyunca gırgır ve uzatma ağlarıyla avlanan 2110 örnek toplanıldı. Örneklenen bireylerin çatal boyu 13,1 ile 60 cm arasında değişmekte olup, dişi/erkek oranı 1:0,79'dur. Boy-ağırlık ilişkileri (LWRs) W=0,0037FL3.3784 ve Fulton's K:1,01±0,001 olarak hesaplanmıştır. Çalışma sonucunda büyümenin pozitif allometik olduğu bulunmuştur (Student's t-test, p < 0,05). von Bertalanffy Büyüme Parametreleri (VBGP) L∞:71,59 cm, K:0,56 yıl-1, t0:-0,18 yıl olarak hesaplanmıştır. Büyüme oranındaki mevsimsel salınım (C: 0,98) ve kış noktası (WP): 0,54, Ø' büyüme performansı indeksi 3,46 olarak hesaplanmıştır. Doğal ölüm (M: 0.74 yr-1), balıkçılık ölüm (F: 2,81 yr-1), toplam ölüm (Z: 3,55 yr-1) ve sömürü katsayısı (E: 0,79 yr-1) olarak hesaplanmıştır. Çalışma sonucunda Karadeniz boyunca S.sarda'da işletme oranının yüksek olduğu tespit edilmiştir.

Keywords

Sarda sarda, Karadeniz, LFDA, ELEFAN, kondisyon faktörü, büyüme parametreleri

Project Number

TAGEM/HAYSÜD/2006/09/02/02

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