İzmir Körfezi (Ege Denizi)’nde Dağılım Gösteren Scomber (Actinopteri: Scombridae) Türlerinin Fekonditesi

İzmir Körfezi’nden 2020-2021 yılı avcılık periyodunda gırgır avcılığı yapan ticari balıkçılardan toplamda 46 adet Scomber colias Gmelin, 1789 (Kolyoz) ve 23 adet Scomber scombrus Linnaeus, 1758 (Uskumru) örneği elde edilmiştir. Laboratuvarda disekte edilen örneklerde olgun dişilere ait 15’er adet ovaryum alınarak fekondite tespit edilmiştir. Scomber scombrus örneklerinde total boy ve fekonditenin minimum-maksimum ve ortalama değerleri sırasıyla; 26,9-31 cm (ort: 28,89±1,44), 150 420-454 260 (ort: 259 300±97 369)’dır. Uskumruda total boy fekondite arasındaki doğrusal bir ilişki tespit edilmiş olup bu değer TL=25,396+0,000013×F (R2=0,83) şeklindedir. Oosit çapı; 1,1- 2 (ort:1,16±0,10) mm’dir. Scomber colias örneklerinde total boy ve fekondite minimum-maksimum ve ortalama değerleri; 25,1-25,9 cm (ort: 25,59±0,26), fekondite 134 853-417 500 (ort: 322 381±84 172)’dır. Kolyozda total boy ile fekondite arasındaki doğrusal bir ilişki tespit edilmiş olup bu değer TL=24,682+0,000003×F (R2=0,80) şeklindedir. Oosit çapı; 0,99-1 (ort:1,02±0,06) mm’dir.

Fecundity of Scomber (Actinopteri: Scombridae) Species Distributed in Izmir Bay (Aegean Sea)

A total of 46 chub mackerel and 23 Atlantic mackerel samples were taken from the commercial fishermen engaged in purse seine fishing from the Izmir Bay during the fishing period of 2020-2021. The samples were dissected in the laboratory, 15 ovaries from mature females were taken and fecundity was determined. The minimum, maximum and mean values of total length of Scomber scombrus respectively; It is 26.9-31 cm (mean: 28.89±1.44), 150 420-454 260 (mean: 259 300±97 369). A linear relationship was determined between total length fecundity in mackerel and this value was TL=25.396+0.000013×F (R2=0.83). Oocyte diameter; It is 1.1-.2 (mean: 1.16±0.10) mm. The minimum, maximum and mean values of total length of Scomber colias respectively; it is 25.1-25.9 cm (mean: 25.59±0.26), fecundity 134 853-417 500 (mean: 322 381±84 172). A linear relationship was found between total length fecundity in lichen and this value was TL=24.682+0.000003×F (R2=0.80). Oocyte diameter; It is 0.99-1 (mean:1.02±0.06) mm.

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