Sığacık Körfezi'ndeki (Ege Denizi) Plesionika heterocarpus'un (Decapoda: Pandalidae) bazı morfometrik özellikleri
Ege Denizi (Doğu Akdeniz)'de, derin su pandalid karidesi Plesionika heterocarpus (A. Costa, l871)'un üreme, büyüme ve populasyon dinamikleri çalışılmıştır. Bireyler aylık olarak, Mayıs 2008 ve Nisan 2009 arasında Sığacık Körfezi'nden 128-550 m derinlikler arasından toplanmıştır. Araştırma sürecinde, toplam 2749 P. heterocarpus bireyi (1112 erkek ve 1637 dişi) toplanmıştır. Karapaks boyu (CL), erkek bireyler için 11,30 mm ve 12,30 mm arasında dişi bireyler için 11,50 mm ve 13,00 mm arasında ölçülmüştür. Yıl boyunca, dişilerin ortalama boy (CL) ve ağırlığı (W) erkeklerin ortalama boy ve ağırlığından sürekli olarak yüksek çıkmıştır. Yumurtalı dişiler yıl boyunca gözlenmiştir. Ana üreme dönemleri Mart ve Ağustos ayları olarak belirlenmiştir. Mevsimsel olarak incelenen tüm gruplarda allometrik katsayısı (b) 3'ten az bulunmuştur. Von Bertalanffy büyüme parametreleri dişilerde L?: 26,25 mm, k: 0,38 yıl-l, erkeklerde L?: 23,63 mm, k:0,49 yıl-l olarak hesaplanmıştır
Some morphometric features of Plesionika heterocarpus (Decapoda: Pandalidae) in Sığacık Bay, Aegean Sea
Reproduction growth and population dynamics of the deep-water pandalid shrimp Plesionika heterocarpus (A. Costa, 1871) were studied in the Aegean Sea (Eastern Mediterranean). Individuals were collected monthly between May 2008 and April 2009 from 128 to 550 m of depth in Sığacık Bay. A total of 2749 individuals (1112 males and 1637 females) of P. heterocarpus were collected during the surveys. Males ranged from 11.30 mm to 12.30 mm CL, and females ranged between 11.50 mm and 13.00 mm CL. The mean size (CL) and weight (W) values of females were consistently exceeding that of males throughout the year. Ovigerous females were observed throughout the year. Main reproductive months can be defined in March and August. In all the groups examined seasonally, the values of allometric coefficient b were less than 3. Estimates of the Von Bertalanffy growth parameters are: L: 26.25 mm, k: 0.38 year-l in females, L: 23.63 mm, k: 0.49 year-1 in males
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