Kırmızı-Mavi Karides Aristeus antennatus’un (Risso, 1816) Antalya Körfezi’ndeki Stok Dinamiği Üzerine Gözlemler

Year 2023, , 88 - 108, 01.06.2023

Coşkun Menderes Aydın , Eyüp Mümtaz Tıraşın

https://doi.org/10.22392/actaquatr.1192961

Cited By: 1

Abstract

Bu çalışmada değerlendirilen Aristeus antennatus örnekleri, Antalya Körfezi'nde Temmuz 2016 ile Temmuz 2017 arasında aylık olarak balıkçılıktan bağımsız ve MEDITS (International Bottom Trawl Survey in the Mediterranean) protokolüne uygun olarak yapılan trol sörveyleri ile toplanmıştır. Biyokütle indeksi 13,6 kg/km2 ve bolluk indeksi 794 birey/km2 olarak hesaplanmıştır. Toplam vücut ağırlığı (TW) ile karapaks boyu (CL) arasındaki ilişki, TW=0,0029×CL2,433 (r2=0.99) olarak tahmin edilmiştir. von Bertalanffy büyüme parametreleri, dişiler için CL∞=62,47 mm, K=0,293 yıl-1, tçapa=0,795 yıl ve erkekler için CL∞=34,19 mm, K=0,614 yıl-1, tçapa=0,287 yıl olarak bulunmuştur. Üreme dönemi yaz mevsimi olarak belirlenmiş olup stoka katılım ilkbahar ve sonbahar aylarında gerçekleşmektedir. Dişi:erkek oranı, 1:0,14 olarak bulunmuştur. İlk üreme boyu, dişiler için 26,15 mm CL, erkekler için de 20,53 mm CL olarak tahmin edilmiştir. Dişiler ve erkekler için yıllık toplam ölüm oranı (Z) sırasıyla 1,38 ve 1,56, yıllık doğal ölüm oranı (M) 0,55 ve 0,59, yıllık sömürü oranı (E) da 0,60 ve 0,62 olarak bulunmuştur. Yürürlükte olan mevzuat gereğince Antalya Körfezi'nin 15 Nisan-15 Eylül tarihleri arasında trol balıkçılığına kapalı olması yerinde bir uygulama olup türün sürdürülebilir balıkçılığı için büyük önem taşımaktadır.

Keywords

Antalya Körfezi, Aristeus antennatus, ELEFAN, MEDITS, CPUE

Supporting Institution

Tarımsal Araştırmalar ve Politikalar Genel Müdürlüğü

Project Number

TAGEM/HAYSUD/2015/A11/P02/2

Thanks

Yazarlar, arazi çalışmalarında yardımlarından dolayı Dr. Öğretim Üyesi Aydın ÜNLÜOĞLU (Dokuz Eylül Üniversitesi, Deniz Bilimleri ve Teknolojisi Enstitüsü) ve Y. Müh. İsmail DAL’a (Akdeniz Su Ürünleri Araştırma, Üretme ve Eğitim Enstitüsü) içtenlikle teşekkür etmektedir.

Observations on the Stock Dynamics of Red-Blue Shrimp Aristeus antennatus (Risso, 1816) in Antalya Bay

Abstract

The samples of Aristeus antennatus used in the present investigation were collected from Antalya Bay (northeastern Mediterranean Sea) during the experimental trawl surveys carried out monthly between July 2016 and July 2017 in accordance with the MEDITS (International Bottom Trawl Survey in the Mediterranean) protocol. The biomass index and the abundance index were calculated as 13.6 kg/km2 and 794 n/km2, respectively. The relationship between total weight (TW) and carapace length (CL) was estimated to be TW=0.0029×CL2.433 (r2=0.99) for both sexes combined. The von Bertalanffy growth parameter estimates were CL∞=62.47 mm, K=0.293 year-1, tanchor=0.795 year for females, and CL∞=34.19 mm, K=0.614 year-1, tanchor=0.287 year for males. The summer season was determined as the reproduction period. Recruitment took place in spring and autumn, and the sex ratio was found to be 1:0.14 in favor of females. The median CL at first maturity was estimated as 26.15 mm for females and 20.53 mm for males. The annual total mortality rate (Z) was 1.38 and 1.56, the annual natural mortality rate (M) 0.55 and 0.59, and the exploitation rate (E) 0.60 and 0.62 for females and males, respectively. The temporal closure of Antalya Bay between 15 April and 15 September for commercial trawl fisheries in accordance with the national fishery regulations in effect is of great importance for the sustainable fisheries of this species.

Keywords

Aristeus antennatus, Antalya Bay, ELEFAN, CPUE, MEDITS

Project Number

TAGEM/HAYSUD/2015/A11/P02/2

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