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    Effects of Exogenous Enzyme Supplementation in Diets on Growth and Feed Utilization in African Catfish, Clarias gariepinus
    (Medwell Online, 2010) Yildirim, Yasemin Bircan; Turan, Funda
    The effects of various supplemental exogenous enzyme on the growth performance in African catfish Clarias gariepinus (initial mean weight 46.32+/-0.29 g) were examined for 12 weeks feeding trial. A multi enzyme complex (containing fungal xylanase, beta-glucanase, pentosonase, beta-amilase, fungal beta-glucanase, hemicellulase, pectinase, cellulase, cellubiase), was included at the level of 0.0 (control group), 0.25, 0.5 and 0.75 g enzyme complex kg(-1) diet in four test diets. Each of the four experimental diets was randomly assigned to triplicate groups of fish and accidentally stocked into 100 L aquaria at a density of 10 fish per aquarium. After 90 days of rearing, the survival rate was ranged from 86.67-93.33% and there was no statistical difference between experimental and control groups. Growth rate significantly increased in fish fed with enzyme complex supplemented diets in comparison with the control groups (p<0.001). Specific growth rate was ranged from 1.09+/-0.03 (control group) to 1.23+/-0.01(0.75 g kg(-1) enzyme complex supplemented group). The best specific growth rate was observed at the group receiving 0.75 g kg(-1) enzyme complex group. Also, food conversion ratio, protein efficiency ratio and apparent net protein utilization were significantly higher in. all enzyme complex groups than that with control (p<0.01). The highest value of protein content (21.75%) was observed at 0.75 g kg(-1) enzyme complex group. The results suggested that enzyme supplementation can significantly improve growth performance and feed utilization in African catfish.
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    Growth and Feed Utilization of Tilapia (Oreochromis aureus) Fed Diets containing Supplementary Enzymes
    (Israeli Journal Of Aquaculture-Bamidgeh, 2010) Yildirim, Yasemin Bircan; Turan, Funda
    A 90-day feeding trial was conducted to investigate the effects of supplemental exogenous enzymes on growth performance in juvenile tilapia Oreochromis aureus (0.22 +/- 0.01 g). A multienzyme complex containing fungal xylanase, beta-glucanase, pentosonase, alpha-amilase, fungal beta-glucanase, hemicellulase, pectinase, cellulase, and cellubiase was included at levels of 0.0 (control), 0.25, 0.5, and 0.75 g/kg diet in four test diets. After 90 days, survival ranged 94.44-97.22%, with no statistical differences between groups. The growth rate was significantly higher in fish fed supplemented diets than in the control. Tilapia fed the 0.75 g/kg diet had a significantly higher growth rate than those fed the control or 0.25 g/kg diet while the best specific growth rate was observed in the group fed the 0.5 g/kg diet. Likewise, the food conversion ratio, protein efficiency ratio, and apparent net protein utilization were significantly better in the 0.5 and 0.75 g/kg groups than in the control and 0.25 g/kg groups. Protein contents in fish fed the 0.5 and 0.75 g/kg diets were significantly higher than in fish fed the control or 0.25 g/kg diet. The highest protein content (20.08%) was in the 0.75 g/kg group. Results suggest that enzyme supplementation can significantly improve growth performance and feed utilization in juvenile tilapia.
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    Parasitological Investigation on Commercially Important Fish and Crustacean Species Collected from the TIGEM (Dortyol Turkey) Ponds
    (Medwell Online, 2010) Yildirim, Yasemin Bircan; Zeren, Alaeddin; Genc, Ercumet; Erol, Cavit; Konas, Egemen
    This study has been conducted in Dortyol TIGEM (General Directorate of Agricultural Enterprises) ponds where Mustafa Kemal University, Faculty of Fisheries, Dortyol-Yeniyurt,Turkey, Fishery Products Research and Application Unit is established. In this field which has a potential for fishery product farming, no pervious study has been detected on parasite existence. In order to determine the existence of parasite organisms in. the fishery products living in TIGEM ponds in Dortyol district where local fishing activities are being conducted within the borders of Hatay province and it is expected to project and implement advanced level of farming activities in the near future, 550 fish and 32 arthropod samples (167 gray mullets (Mugil cephalus Linnaeus, 1758), 188 tilapias (Tilapia zilli Gervais, 1848), 70 sea bass (Dicentrarchus labrax Linnaeus, 1758), 125 marmid (Acanthabrama marmid Heckel, 1843), 32 blue crab (Callinectes sapidus Rathbun, 1896)) have been taken and examined during the year between April 16th, 2007 and March 17th, 2008. In this study, from Dortyol TIGEM ponds, Diplozoon paradoxum (Nordman, 1832) and Tetraonchus sp. (Diesing; 1858) have been detected in Tilapia zilli (Gervais, 1848) and Diplozoon paradoxum (Nordman, 1832) and Tetraonchus sp. (Diesing, 1858), which is a Monogenean parasite has been detected in Acanthobrama marmid (Heckel, 1843) as a new host and is being reported for the first time.
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    Parasitological investigation on commercially important fish and crustacean species collected from the TIGEM (Dortyol Turkey) ponds
    (2010) Yildirim, Yasemin Bircan; Zeren, Alaeddin; Gene, Ercumet; Erol, Cavit; Konas, Egemen
    This study has been conducted in Dortyol TIGEM (General Directorate of Agricultural Enterprises) ponds where Mustafa Kemal University, Faculty of Fisheries, Dortyol-Yeniyurt,Turkey, Fishery Products Research and Application Unit is established. In this field which has a potential for fishery product farming, no pervious study has been detected on parasite existence. In order to determine the existence of parasite organisms in the fishery products living in TIGEM ponds in Dortyol district where local fishing activities are being conducted within the borders of Hatay province and it is expected to project and implement advanced level of farming activities in the near future, 550 fish and 32 arthropod samples (167 gray mullets (Mugil cephalus Linnaeus, 1758), 188 tilapias {Tilapia zilli Gervais, 1848), 70 sea bass (Dicentrarchus labrax Linnaeus, 1758), 125 marmid (Acanthabrama marmid Heckel, 1843), 32 blue crab (Callinectes sapidus Rathbun, 1896)) have been taken and examined during the year between April 16th, 2007 and March 17th, 2008. In this study, from Dortyol TIGEM ponds, Diplozoon paradoxum (Nordman, 1832) and Tetraonchus sp. (Diesing, 1858) have been detected in Tilapia zilli (Gervais, 1848) said Diplozoon paradoxum (Nordman, 1832) and Tetraonchus sp. (Diesing, 1858), which is a Monogenean parasite has been detected in Acanthobrama marmid (Heckel, 1843) as a new host and is being reported for the first time. © Medwell Journals, 2010.
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    Use of Dietary Pelargonium sidoides Extract to Improve Growth and Body Composition of Narrow-Clawed Crayfish Astacus leptodactylus Eschscholtz, 1823 Juveniles
    (Central Fisheries Research Inst, 2012) Turan, Funda; Mazlum, Yavuz; Yildirim, Yasemin Bircan; Gezer, Armagan
    The effects of the Pelargonium sidoides extract on survival, growth, and body composition of juvenile freshwater crayfish (Astacus leptodactylus) were investigated. Newly hatched third instars of A. leptodactylus were fed with experimental diets prepared by using supplementation of P. sidoides extract (0, 0.5, 1 and 2 ml 100 g(-1)) for 105 days. Growth rate was increased significantly in crayfish fed with 2 ml P. sidoides extract 100 g(-1) diet in comparison to the control groups (P<0.05). Feed conversion ratio, protein efficiency ratio and apparent net protein utilization were also significantly improved in group fed diet with 2 ml 100 g(-1) P. sidoides extract than that with control and the other groups. After 105 days of rearing the survival rate was found highest in 2 ml P. sidoides extract 100 g(-1) diet supplemented group (80.0%). Protein content (16.5%) of the 2 ml 100 g(-1) P. sidoides extract-supplemented group was significantly higher than the control and other dietary groups (P<0.05). The lipid contents were decreased in P. sidoides extract-supplementation. These results indicated that the P. sidoides extract is useful to improve growth, feed utilization and survival rate in freshwater crayfish, juvenile diets.