Food, feeding habits and biochemical composition of Scatophagus argus

Scatophagus argus, benekli argus balığı, Pasifik havzası boyunca geniş bir alana dağılmıştır. Bu tür, acı su akvaryum balığı olarak değerlidir ve kendi doğal ortamında önemli bir yem balığıdır. Çalışmada bu türün beslenme alışkanlıkları, kondüsyon faktörü ve kas biyokimyasal kompozisyonu değerlendirilmiştir. Balığın yem tercihi ve beslenmesi konusunda alglerin ve taş döküntülerinin balığın bağırsak içeriğinde baskınlık oluşturduğu belirlenmiştir. Benekli argus, avının bolluğuna bağlı olarak beslenme ekolojisinde ve yem seçiciliğinde esneklik göstermektedir. Bağırsak içeriği, boyda artış ile birlikte diyette ontogenetik değişim göstermektedir. Sonuçlar, bağırsak bağıl boyunun omnivor bir balık için normal sayılabilecek ortak bir görüş olan 3,1 (2,14 ile 3,96 arasında dağılım göstermektedir) olduğunu göstermiştir. S. argus’un kasının biyokimyasal kompozisyonu çalışılmıştır. Mevsimlere bağlı olarak proksimal kompozisyonda çeşitlilikler tespit edilmiştir.

Anahtar Kelimeler:

biyokimya, balık beslenmesi, beslenme alışkanlığı, Scathophaga

Scatophagus argus‘un yem, beslenme alışkanlıkları ve biyokimyasal kompozisyonu

The spotted scat (Scatophagus argus) is widely distributed throughout Indo Pacific basin. This species is valuable brackish water aquarium fish and an important food fish in parts of its range. A study on the feeding habits, condition factor and muscle biochemical composition was carried out. The present study on the food and feeding revealed that algae and detritus dominated the gut contents of the fish. Spotted scat showed flexibility in their feeding ecology and food selection was based on relative abundance of prey. The gut contents showed an ontogenetic shift in diet with an increase in length. The results showed that the relative length of gut is 3.1 (ranging from 2.14 to 3.96) which is commonly considered normal for an omnivorous fish. The muscle biochemical composition of the fish, S. argus was studied. It showed variation with season in its proximal composition.

Keywords:

biochemistry, fish feeding, feeding habits, Scathophaga,

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