A Review on gyrodactylidae and dactylogyridae (Monogeneans) and their importance in aquaculture

Monogenea'lar parazitik olarak genelde balıklarda; Agnatha, Chondrichthyes, and OsteichthyesTerde görülürler. Monogenea'larin konakçı balığa karşı olan yüksek derecedeki seçiciliği ve yasam ömrünün kısa olmasına bağlı olarak, her" biri yüzlerce türe sahip olan önemli en az iki üst cins (Dactylogyrus ve Gyrodacylm) içerir. Bunlar tatlı ve deniz sularında çok yaygın olarak bulunur ve bugüne kadar 4000' i aşkın türü tanımlanmıştır. Genelde konakçı balığa çok az yada hiç zarar vermezler, ama balıkların stres faktörleri ile yüz yüze geldikleri yapay kültür ortamlarında hastalıklara ve ölümlere yol açarlar. Örneğin, uzun zamandan beri bilinmeleriyle birlikte, son yıllarda Gyrodacylus salaries' in Norveç'teki salmon populasyonunu yok edecek bir patonsiyele sahip olduğu görülmüştür. Akuakültüriin hızla gelişmesi ile birlikte yeni balık türlerinin kültür edilmesi sonucu, monogeneanlardan kaynaklanacak balık ölümlerininde artması beklenmektedir.

Gyrodactylidae ve daclogyridae (Monogeneanlar) ve bunların akuakültürdeki önemi

Monogeneans are parasitic worms, primarily on fishes, including, the Agnatha, the Chondrichthyes, and Osteichthyes. The monogenea includes at least two super-genera (Dactylogyrus and Gyrodactylus) each of which has hundreds of species, possible reason for this include their high host specificity and short generation time. They are widespread throughout freshwater and marine habitats and about 4000 species have been described so far. Usually little or no harm is done to the host, but on occasion these flukes contribute to disease of the host in artificial system where fish are subject to number of stress factors. Besides being long recognized parasites, potentially severe pathogens have appeared, quite recently such as Gyrodactylus salaris which has destroyed salmon population in Norway. As more species of fishes became cultivable -with the development of aquaculture, the chances offish losses caused by monogeneans will increase.

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