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    Effect of supplemented algal carotenoid diets on skin color of tomato clownfsh, amphiprion frenatus
    (University of Punjab (new Campus), 2017) Hekimoglu M.A.; Firat K.; Saka S.; Süzer C.; Kop A.; Durmaz Y.
    This study analyzes the effect of Nannochloropsis oculata and Porphyridium cruentum as natural pigment sources on skin color of tomato clownfsh, Amphiprion frenatus. Two groups, each of 6 fsh were fed on feed containing (69.8±9.158 mg.g-1) N. oculata (Group A), and 67.21±7.068 mg.g-1 of P. cruentum (Group B). The third group (Group C) was fed on control basal diet (34.93±29.07 mg.g-1). Total carotenoid content of fsh skin was determined at 30-day intervals. At the end of the experiment the highest weight gain was found to be 1.73±0.37g in Group B, whereas the lowest performance (1.29±0.38 g) was received in Group C. The best feed conversion ratio was found in at Group B. The total carotenoid content of skin of fsh were found to be 0.77±0.61 µg.g-1 on the initial day in the experimental group. As a result of the measurements performed on the 120th day, the pigment values were determined as 30.39±0.39 µg.g-1 in Group A, 39.07±1.12 µg.g-1 in Group B and 35.68±10.69 µg.g-1 in the Group C. Group B pigment source is more effective on the color of tomato clownfsh A. frenatus. © 2017 Zoological Society of Pakistan.
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    Enzymatic characteristics and growth parameters of ornamental koi carp (Cyprinus carpio var. koi) larvae fed by artemia nauplii and cysts [Artemia Nauplii ve kisti ile beslenen koi (Cyprinus carpio var. koi) larvalari{dotless}nda enzimatik özellikler ve büyüme parametrelerinin İncelenmesi]
    (Central Fisheries Research Inst, 2014) Hekimoglu M.A.; Suzer C.; Saka Ş.; Firat K.
    The purpose of this study was to compare the larval growth and digestive enzyme activities of koi carp (Cyprinus carpio var. Koi) larvae fed on Artemia nauplii (AN) and decapsulated cyst (ADC). The experiment was carried out in triplicate and lasted 27 days. Specific growth and survival rates, specific activities of total protease, lipase, amylase and chitinase were examined in experimental groups. At the end of the experiment for group fed with AN total length, weight and SGR were 20.56±3.23 mm, 0.9±0.05 g and 2.03 % d-1, respectively and for group fed with ADC it was 28.16±4.81 mm, 0.28±0.16 g and 6.02 d-1 (P<0.05). However, survival rates in the group fed on ADC was 98.88 % while in the group fed on AN was 97.77 % (P>0.05). Besides, there were significant differences on specific enzyme activities (total protease, amylase, chitinase, lipase) (P<0.05). Obtained results suggested that koi larvae fed by ADC presented relatively higher growth parameters. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey.