egejfas Ege Journal of Fisheries and Aquatic Sciences 2148-3140 Ege Üniversitesi 10.12714/egejfas.2017.34.3.16 Distribution dynamics of ichthyoplankton and recruitment hypotheses İhtiyoplanktonun dağılım dinamikleri ve stoka katılım hipotezleri Mavruk Sinan ÇUKUROVA ÜNİVERSİTESİ, SU ÜRÜNLERİ FAKÜLTESİ, SU ÜRÜNLERİ TEMEL BİLİMLERİ BÖLÜMÜ, DENİZ BİYOLOJİSİ ANABİLİM DALI Avşar Dursun ÇUKUROVA ÜNİVERSİTESİ, SU ÜRÜNLERİ FAKÜLTESİ, SU ÜRÜNLERİ TEMEL BİLİMLERİ BÖLÜMÜ, DENİZ BİYOLOJİSİ ANABİLİM DALI 09 26 2017 34 3 355 361 01 17 2017 03 10 2017 Copyright © 1984, Su Ürünleri Dergisi 1984 Su Ürünleri Dergisi

Planktonic eggs and larvae of marine teleost fishes are considered asichthyoplankton until they improve active locomotion. These fishes usuallyproduce a large number of propagules however, the great majority of them diebefore recruitment due to the extrinsic conditions such as predation,starvation and aberrant drift. In this period, small variations in survivalrates may cause important differences in recruitment success. On the otherhand, the presence of the ideal habitats which can sustain maximal survival forpropagules, can significantly change in space and time. Therefore, it iscritically important that emergence of propagules should match with theappearance of ideal habitats. To ensure this match, fishes have advanceddifferent spawning strategies. In this review, intrinsic (spawning strategies)and extrinsic (environmental factors) conditions affecting the spatio-temporaldistribution of ichthyoplankton have been evaluated on a theoretical basis bydiscussing match-mismatch dynamics and recruitment hypotheses.

Denizelkemikli balıkların çoğunda yumurta ve larval aşamalar planktonik özellikgöstermektedir. Bu formlar aktif hareket kabiliyeti kazanıncaya dek balıkplanktonu anlamına gelen ihtiyoplankton kapsamında değerlendirilmektedir.Kemikli balıklar genellikle çok sayıda yumurta üretmekte; bu yumurtalardanönemli bir kısmı, açlık, predasyon, anormal sürüklenmeler ve saçılmalar gibinedenlerle stoka katılım öncesinde ölmektedir. Bu süreçte, yaşam oranlarındakiküçük değişimler stoka katılımda önemli farklılıklar yaratabilmektedir. Diğertaraftan, maksimum sayıda yavruyu hayatta tutabilecek ideal habitatlarınvarlığı alan ve zamansal açıdan değişkenlik sergilemekte; bu nedenle,yavruların ideal çevresel koşullarla buluşturulması kritik önem arz etmektedir.Balıklar, bu eşleştirmeyi sağlamak amacıyla çeşitli üreme stratejilerigeliştirmişlerdir. Bu derleme çalışmasında, ihtiyoplanktonun alansal vezamansal dağılımını etkileyen iç (yumurtlama stratejisi) ve dış (çevreselkoşullar) faktörler teorik bir çerçevede ele alınmış, planktonik evrelerinstoka katılım başarısındaki rollerini vurgulayan hipotezlerle birliktetartışılmıştır.

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