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    Effects of dietbome copper on accumulation hi the tissues and organs, growth and feed utilization of rainbow trout (Oncorhynchus mykiss, Walbaum, 1792) Juvenile
    (2009) Gundogdu, Ayse; Harmantepe, F. Burcu; Dogan, Gaye; Karsli, Zafer; Asci, Mehtap Yagan
    The present experiment was conducted to study effects of elevated dietary Cu and establish upper limits of Cu in fish feed. Accumulation and growth of dietbome copper in the gill, muscle tissue, digestive system and whole body of rainbow trout (Oncorhynchus mykiss, Walbaum). Four experimental isonitrogenic (460 g kg-1) and isolipidic (200 g kg-1) diets were formulated. Diets were prepared by adding 0 (control), 0.1, 0.4 or 1.6 g kg-1 CuSO4.5H2O feed, respectively. Each diet was randomly assigned to triplicate groups of 576 juvenile fish whose average weight 19.97±0.048 g. Fish were fed to satiation for experimental period. After 15, 30, 45 and 60 days, the fish were sampled and Cu accumulation in the gill, muscle tissue and the digestive system were determined. The data were presented in ug of sample Dry Weight (DW). At the end of the trial, with increasing dietary Cu concentration, Cu accumulation of gill, muscle tissue, liver and the digestive system were increased. However, accumulation of gill were not significant (p>0.05) in the fish fed with 0.4 (D 3) and 1.6 (D 4) g kg-1 CuSO4.5H2O diets. Accumulation of muscle tissue were not significant (p>0.05) in the fish fed with 0 (D 1) and 0.1 (D 2) g kg-1 CuSO4.5H2O diets. The accumulation of Cu in the digestive system increased with increasing dietary Cu concentration and at periyot were significant (p<0.05) in group fed with the highest Cu concentration diet. © Medwell Journals, 2009.
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    Effects of Dietborne Copper on Accumulation in the Tissues and Organs, Growth and Feed Utilization of Rainbow Trout (Oncorhynchus mykiss, Walbaum, 1792) Juvenile
    (Journal of Animal and Veterinary Advances, 2009) Gündoğdu, Ayşe; Harmantepe, F. Burcu; Doğan, Gaye; Karslı, Zafer; Aşcı, Mehtap Yağan
    The present experiment was conducted to study effects of elevated dietary Cu and establish upper limits of Cu in fish feed. Accumulation and growth of dietborne copper in the gill, muscle tissue, digestive system and whole body of rainbow trout (Oncorhynchus mykiss, Walbaum). Four experimental isonitrogenic (460 g kg-1) and isolipidic (200 g kg-1) diets were formulated. Diets were prepared by adding 0 (control), 0.1, 0.4 or 1.6 g kg-1 CuSO4.5H2O feed, respectively. Each diet was randomly assigned to triplicate groups of 576 juvenile fish whose average weight 19.97±0.048 g. Fish were fed to satiation for experimental period. After 15, 30, 45 and 60 days, the fish were sampled and Cu accumulation in the gill, muscle tissue and the digestive system were determined. The data were presented in ?g of sample Dry Weight (DW). At the end of the trial, with increasing dietary Cu concentration, Cu accumulation of gill, muscle tissue, liver and the digestive system were increased. However, accumulation of gill were not significant (p>0.05) in the fish fed with 0.4 (D 3) and 1.6 (D 4) g kg-1 CuSO4.5H2O diets. Accumulation of muscle tissue were not significant (p>0.05) in the fish fed with 0 (D 1) and 0.1 (D 2) g kg-1 CuSO4.5H2O diets. The accumulation of Cu in the digestive system increased with increasing dietary Cu concentration and at periyot were significant (p<0.05) in group fed with the highest Cu concentration diet
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    Elimination of copper in tissues and organs of rainbow trout (Oncorhynchus mykiss, Walbaum, 1792) following dietary exposure
    (Taylor & Francis Ltd, 2011) Gundogdu, Ayse; Harmantepe, F. Burcu; Karsli, Zafer; Dogan, Gaye
    Copper (Cu) elimination was investigated in the tissue and organs of rainbow trout (Oncorhynchus mykiss, Walbaum, 1792), after Cu-free diets exposure. In the current study, fish were fed to satiation on diets containing 0.022 (Group 1; Control), 0.043 (Group 2), 0.123 (Group 3), 0.424 (Group 4) g Cu*kg(-1) diet for 60 days before elimination experiment. A total of 288 fish (mean weight 84.28 +/- 1.05 g) were randomly transferred to 12 fibreglass tanks. The fish were fed the Cu-free diet twice daily, until apparent satiation, during 60 days. Subsequently, the experiment was established for a period of elimination, during which samples were taken at days 15, 30, 45 and 60. Cu concentration in the muscle, gill tissue, digestive system, liver and whole body of fish were determined after 60 days depuration. Cu concentrations in tissues of rainbow trout decreased during depuration period, and the order of Cu elimination in tissue and organs of rainbow trout was: digestive system (73.1 %), then gill (41.1 %), muscle (31.5 %) and liver (17.2 %) for group 2; digestive system (74.1%), then muscle (65.8%), gill (60.0%) and liver (34.6%) for group 3; and digestive system (85.8%), then muscle (80.8%), liver (50.5%) and less/equal in gill (50.2%) for group 4. In statistical analysis, both groups and time were significant factors (P<0.05) on elimination rate. Moreover, significant interaction between groups and time were identified on elimination rate. Digestive system showed the fastest elimination rates of Cu at all groups compared with other tissues.