Güneydoğu Karadeniz’de Flexopecten glaber’in Mekânsal-Zamansal Dağılımı ve Popülasyon Yapısı

Abstract

ÖZET Bu çalışma, Türkiye’nin Güney Karadeniz kıyıları boyunca dağılım gösteren deniz tarağı (Flexopecten glaber) türünün popülasyon dinamiklerini, ekolojik rolünü ve yetiştiricilik potansiyelini incelemektedir. Yerel paydaşlardan artan bildirimler, türün mekânsal dağılımının, morfometrik ilişkilerinin ve popülasyon yapısının araştırılmasını gerekli kılmıştır. Arazi örneklemesi, üç derinlik tabakasında (5–35 m) yer alan 84 istasyonda gerçekleştirilmiş ve toplam 1.009 birey elde edilmiştir. Morfometrik analizler, kabuk boyutları arasında güçlü doğrusal korelasyonlar ortaya koymuş; Boy ağırlık ilişkisi analizleri ise negatif allometrik bir büyüme modeli (W = 0,0004 SL²,⁶⁵⁸⁹) göstermiştir. Von Bertalanffy büyüme parametresi ile yapılan büyüme modellemesi, ılıman bölgelerde yaşayan yavaş büyüyen çift kabuklularla uyumlu parametreler (H∞ = 118,82 mm, K = 0,09, t₀ = –0,67) üretmiştir. Çok değişkenli analizler (ANOSIM, SIMPER, MDS), bazı istasyonlarda küçük farklılıklar olsa da yapısal olarak düzenli bir dağılım göstermiştir; daha derin tabakalarda daha istikrarlı popülasyonların bulunduğu belirlenmiştir. Birden fazla boy kohortunun tespit edilmesi ve düşük antropojenik etkiye sahip alanlarda daha yüksek biyokütle gözlenmesi, türün üreme ve hayatta kalma için elverişli çevresel koşullar bulduğunu göstermektedir. Tarihsel olarak Karadeniz’de varlık gösteren F. glaber üzerine, özellikle üreme biyolojisi ve habitat bazlı tepkiler açısından yapılan araştırmalar sınırlıdır. Bu çalışma, gelecekteki izleme ve yönetim çalışmalarına temel oluşturacak önemli başlangıç verilerini sunmaktadır. Ekolojik esnekliği, filtre beslenme özelliği ve ekonomik değeri göz önüne alındığında, F. glaber sürdürülebilir su ürünleri yetiştiriciliği için umut verici bir adaydır. Bulgular ayrıca, türün uzun vadeli sürdürülebilirliğini sağlamak amacıyla ihtiyatlı avcılık yaklaşımlarının ve hedefe yönelik habitat koruma önlemlerinin benimsenmesini desteklemektedir. Anahtar Kelimeler: Flexopecten glaber, Popülasyon Dinamikleri, Karadeniz, Sürdürülebilir Balıkçılık.

Keywords

• Flexopecten glaber
• Popülasyon Dinamikleri
• Karadeniz
• Sürdürülebilir Balıkçılık

Spatio-Temporal Distribution and Population Structure of Flexopecten glaber in the Eastern Southern Black Sea

Abstract

ABSTRACT This study investigates the population dynamics of the smooth scallop (Flexopecten glaber) along the southern Black Sea coast of Türkiye, with a focus on its ecological role and aquaculture potential. Increasing reports from local stakeholders have highlighted the need to examine its spatial distribution, morphometric relationships, and population structure. Field sampling was conducted at 84 stations across three depth strata (5–35 m), yielding 1,009 specimens. Morphometric analyses revealed strong linear correlations among shell dimensions, and Length–Weight Relationship (LWR) analysis indicated a negative allometric growth pattern (W = 0.0004 SL²·⁶⁵⁸⁹). Growth modeling using the von Bertalanffy Growth Function produced parameters (H∞ = 118.82 mm, K = 0.09, t₀ = –0.67) consistent with slow-growing bivalves in temperate environments. Multivariate analyses (ANOSIM, SIMPER, MDS) demonstrated patchy yet structured distributions, with deeper strata supporting more stable populations. The detection of multiple size cohorts and elevated biomass in areas with low anthropogenic impact suggests favorable environmental conditions for recruitment and survival. Although historically present in the Black Sea, F. glaber has remained understudied, particularly regarding reproductive biology and habitat-specific responses. This study provides essential baseline data for future monitoring and management. Given its ecological plasticity, filter-feeding role, and market value, F. glaber emerges as a promising candidate for sustainable aquaculture. The findings further support the adoption of precautionary exploitation measures and targeted habitat protection to ensure the long-term viability of this ecologically valuable bivalve. Keywords: Flexopecten glaber, Population Dynamics, Black Sea, Sustainable Fisheries.

Keywords

• Flexopecten glaber
• Population Dynamics
• Black Sea
• Sustainable Fisheries

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