TY  - JOUR
T1  - Fecundity, condition, and ovarian histology of the Lessepsian migrant fish Siganus luridus (Rüppell, 1829) inhabiting the Southern Aegean Sea
TT  - Güney Ege Denizi’nde yaşayan Lessepsiyen göçmen balık Siganus luridus (Rüppell, 1829)’un fekonditesi, kondisyonu ve ovaryum histolojisi
AU  - Soykan, Ozan
AU  - Engin, Serhat
AU  - Cerim, Hasan
PY  - 2026
DA  - June
Y2  - 2026
DO  - 10.12714/egejfas.43.3.03
JF  - Ege Journal of Fisheries and Aquatic Sciences
JO  - EgeJFAS
PB  - Ege University
WT  - DergiPark
SN  - 2148-3140
SP  - 207
EP  - 215
VL  - 43
IS  - 3
LA  - en
AB  - In recent years, one of the lessepsian migrant, Siganus luridus (Rüppell, 1829) extended its dispersal towards the Aegean Sea. Because of lacking data on the reproduction of the species along the Turkish coast, the aim of the present study was to determine some reproductive characters of dusky spinefoot Siganus luridus such as the reproductive cycle, fecundity and condition factor. A total of 181 female fish were sampled from Gökova Bay in the southern Aegean Sea using small-scale fisheries (trammel nets) and recreational fishing methods (angling and trap fisheries) between July 2019 and June 2020. Variations in the gonadosomatic index (GSI) and gonadal histological changes indicated that reproduction of S. luridus started in May, peaked in August and gradually decreased in September. Individuals ready to spawn were mostly observed between May and September, with the highest occurrence in August. The highest K value was found in April (1.67 ± 0.11) and the lowest in September (1.39 ± 0.11). Spawning females ranged from 14.8 to 25.6 cm total length. Absolute fecundity varied between 98,607 and 801,460 oocytes per female within a total length range of 12.2–25.6 cm. Relative fecundity ranged from 1,107 to 2,952 oocytes g⁻¹, with an average value of 1,734 ± 747 oocytes g⁻¹. Length at maturity value was calculated to be 16.19 cm. Findings of the present work are useful for fisheries management and may serve as the fundamental source for aquaculture of the species.
KW  - Rabbitfish
KW  - gonadosomatic index (GSI)
KW  - spawning season
KW  - reproductive biology
KW  - lessepsian migration
N2  - Son yıllarda, Lessepsiyen göçmen türlerden biri olan Siganus luridus Ege Denizi’ne doğru dağılımını genişletmiştir. Türün Türkiye kıyılarındaki üremesine ilişkin verilerin yetersizliği nedeniyle, bu çalışmanın amacı, esmer sokar balığı (Siganus luridus)’nun üreme döngüsü, fekonditesi ve kondisyon faktörü gibi bazı üreme özelliklerini belirlemektir. Temmuz 2019 ile Haziran 2020 tarihleri arasında, Gökova Körfezi (Güney Ege Denizi)’nden küçük ölçekli (gırgır ağları) ve amatör (olta ve tuzak balıkçılığı) avcılıkla aylık olarak toplam 181 dişi birey örneği toplanmıştır. Gonadosomatik indeks (GSI) değişimleri ve gonad histolojik incelemeleri, üremenin Mayıs ayında başladığını, Ağustos ayında zirveye ulaştığını ve Eylül ayında kademeli olarak azaldığını göstermiştir. Yüksek GSI değerleri Temmuz ve Ağustos aylarında saptanmıştır, ancak yumurtlamaya hazır bireyler esas olarak Mayıs–Eylül arasında gözlenmiş, en yoğun dönem Ağustos olmuştur. En yüksek K değeri Nisan ayında (1,67 ± 0,11), en düşük değer ise Eylül ayında (1,39 ± 0,11) bulunmuştur. Yumurtlayan dişilerin toplam boyları 14,8–25,6 cm arasında değişmiştir. Mutlak fekondite dişi başına 98.607 ile 801.460 oosit arasında (12,2–25,6 cm LT), relatif fekondite ise 1.107 ile 2.952 oosit g⁻¹ arasında olup ortalama 1.734 ± 747 oosit g⁻¹ olarak hesaplanmıştır. İlk eşeysel olgunluk boyu 16,19 cm olarak belirlenmiştir. Elde edilen bulgular, balıkçılık yönetimi için yararlı olmanın yanı sıra türün yetiştiriciliği için temel kaynak niteliği taşımaktadır.
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UR  - https://doi.org/10.12714/egejfas.43.3.03
L1  - https://dergipark.org.tr/en/download/article-file/5284094
ER  -