Prey selection by African catfish Clarias gariepinus (Burchell, 1822) larvae fed different feeding regimes
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Tarih
2006
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info:eu-repo/semantics/openAccess
Özet
Mevcut çalışmada karabalık, Clarias gariepinus, larvalarının canlı yem seçimi laboratuar koşullarında incelenmiştir. Dış beslenmeye geçen larvalara 7 gün boyunca plankton, plankton + alabalık başlangıç yemi ve plankton + betain ilaveli alabalık başlangıç yemi verildi. Yemlemeden 15 dakika sonra her muameleden 5 larva mide içeriklerini ve seçicilik indekslerini tespit etmek için örneklendi. Kuru yemlerin larvaların canlı yem seçimlerini etkilememesine rağmen, büyümelerini önemli derecede iyileştirdiği gözlendi (P < 0,05). Tüm yemleme rejimlerinde de karabalık larvalarının diğer zooplankton türlerinden çok Kopepod ve Rotaria türlerini tercih ettiği belirlenmiştir.
Live prey selection by African catfish, Clarias gariepinus, larvae was examined under laboratory conditions. Larvae were offered plankton, plankton + trout starter (TS) and plankton + betaine supplemented trout diet (BTS) for 7 days after exogenous feeding. Five larvae were sampled to determine their gut contents and selectivity index for each treatment 15 min after the feeding. It was observed that dry diets (TS and BTS) improved the growth (P < 0.05), but did not significantly influence the prey selection of the larvae. It was determined that African catfish larvae preferred Copepods and Rotaria sp. to other zooplankton species for all feeding regimes.
Live prey selection by African catfish, Clarias gariepinus, larvae was examined under laboratory conditions. Larvae were offered plankton, plankton + trout starter (TS) and plankton + betaine supplemented trout diet (BTS) for 7 days after exogenous feeding. Five larvae were sampled to determine their gut contents and selectivity index for each treatment 15 min after the feeding. It was observed that dry diets (TS and BTS) improved the growth (P < 0.05), but did not significantly influence the prey selection of the larvae. It was determined that African catfish larvae preferred Copepods and Rotaria sp. to other zooplankton species for all feeding regimes.
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Turkish Journal of Zoology
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Cilt
30
Sayı
1
