Bu çalışmada, rotifer Brachionus plicatilis kültüründe 2 formüle emülsiyon (Emülsiyon-I ve Emülsiyon-II) 3 farklı ticari ürün (Olio w-3, Red Pepper (n-3) Top Rich) kullanımının popülasyon artışı üzerine etkisi araştırılmıştır. Rotiferler için oluşturulan deneme grupları sırasıyla; DHA-Gold (Kontrol), + Emülsiyon-I (1. Grup), Emülsiyon-II (2. Olio w-3 (3. (4. Rich (5. Grup) olarak belirlenmiştir...

In the later years increased interest in the use of Labrus bergylta (ballan wrasse) as a cleaner fish on Salmo salar (Atlantic salmon) has caused the emergence of commercial farming of L. bergylta. In order to cultivate such a species, knowledge about its digestive physiology and its nutritional requirements is important, especially in larvae. It has therefore been suggested that a thorough inv...

Trophic relationships, such as those between predator and prey or between pathogen and host, are key interactions linking species in ecological food webs. The structure of these links and their strengths have major consequences for the dynamics and stability of food webs. The existence and strength of particular trophic links has often been assessed using observational data on changes in specie...

Live feed is the basic food source and nutrient security for successful seed production of any commercially important aquaculture species fishes, mollusks crustaceans. Both plant animal originated aquatic microscopic organisms are generally termed as live food. They items in early stages (larval stage) life cycle due to small sizes, easy digestibility enriched nutrients. The Nannochloropsis sp....

Co-occurrence of cryptic species raises theoretically relevant questions regarding their coexistence and ecological similarity. Given their great morphological similitude and close phylogenetic relationship (i.e., niche retention), these species will have similar ecological requirements and are expected to have strong competitive interactions. This raises the problem of finding the mechanisms t...

Current knowledge of the principles of population dynamics is unsatisfactory on both empirical and theoretical grounds. The main problems are a weak empirical base, overly simple models with but vague links to real systems, and little effective interplay between theory and experiment. We therefore believe there is a need for renewed emphasis on carefully controlled laboratory studies of populat...

17 The SS-type rotifer Brachionus rotundiformis is a common initial food for rearing fish 18 larvae with small mouth. However, there are commercially important fish species whose mouth 19 sizes are too small to feed on SS-type rotifers. In 2004, we isolated a small (body length= 82.7 20 ±10.9 μm; body width 40.5±6.4 μm), flexible, and iloricate rotifer, Proales similis from an 21 estuary in Oki...

Several aspects of the response to toxicants using a standardized toxicity test with the freshwater rotifer Brachionus calyciflorus are described. Test animals are obtained by hatching cysts which produce animals of similar age and physiological condition. The acute toxicity of 28 compounds is described with 24-hr LC50's. The LC50's span five orders of magnitude, from silver at 0.008 mg.liter-1...

Ž . Ž . Inputs of either napier grass NG or diammonium phosphate plus urea NP containing similar Ž y1 y1. Ž y1 y1. amounts of nitrogen 17 kg N ha week and phosphorus 1.2 kg P ha week were made to Tilapia rendalli ponds from which offspring were either partially removed or left to grow. After Ž . 364 days, average weight of stocked fish in NG ponds 74.3 g was significantly higher Ž . Ž . P-0.05 ...