Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleYalnız künye2025Scopus SJRQ4The profile of fatty acids in the gametes of brook trout (Salvelinus fontinalis) ofduring the spawning period under culture conditions
Kocabas, Mehmet; Kutluyer-Kocabas, Filiz; Basçinar, Nadir; Özçiçek, Esin; Kirmizikaya-Özmen, Gorkem; Yilmaz, Okkes
The fertilization and subsequently embryo and larvae development are linked to gamete quality and FA (fatty acid) content is one of the specific factors affecting egg or sperm quality. Hence, FA profile of gametes (egg and sperm) was documented in brook trout (Salvelinus fontinalis) under cultivation. FAs were detected and measured using gas chromatography. These results indicated that a total of 26 and 22 FAs were determined in egg and sperm, respectively. The levels of PUFAs were determined in nearly identical quantities in both egg (47.57%) and sperm (47.53%). DHA (Docosahexaenoic acid), LA (Linoleic acid), EPA (Eicosapentaenoic acid) and ARA (Arachidonic acid) were predominant PUFAs for egg and sperm. Interestingly, vaccenic acid (C18:1 n-11) (24.07%) was major FAs in egg. In conclusion, the analysis of fatty acids in broodstock gametes contributes valuable insights into the dietary requirements necessary for effective aquaculture breeding programs.
- MakaleYalnız künye2013Scopus SJRQ3The Effect of Different Feeding Protocols on Compensatory Growth of Black Sea Trout Salmo trutta labrax
Kocabas, Mehmet; Basçinar, Nadir; Kayim, Murathan; Er, Halil; Sahin, Halit
The objective of this study was to determine the effects of different feeding protocols on compensatory growth, feeding rate, and feed conversion efficiency of Black Sea Trout Salmo trutta labrax. To our knowledge, no previous feeding experiments with Black Sea Trout have incorporated a fasting period to simulate the handling and acclimation conditions experienced by farmed fish. Fifteen fish per tank (10.69 +/- 0.06cm and 13.22 +/- 0.14g, mean +/- SE) were stocked into 40-L fiberglass tanks. Fish were fed with different fasting-feeding regimes for 95 d and were equally allotted to four treatments (T-cont: control; T5-10: 5 d fasting, 10days feeding; T10-10: 10 d fasting, 10 d feeding; and T15-10: 15 d fasting, 10 d feeding) with three replicates per treatment. The results indicated that length (P = 0.0005), weight (P = 0.000), condition factor (P = 0.013), and specific growth rate (P = 0.014) were significantly affected by the interaction between feeding and time. All fasting treatments showed partial compensation during refeeding. There was an increase in daily feeding rate and feed conversion efficiency in fasting treatments compared with the control treatment. In contrast, at the end of the experiment specific growth rate, condition factor, and body weight in fasting treatments were significantly lower compared with the control treatment. We concluded that there was partial compensation of growth with regular refeeding after periods of feed deprivation (e.g., 5, 10, or 15 d) over a long term and a shorter fasting period may be preferred in order to achieve compensatory growth. Received November 9, 2012; accepted April 9, 2013
AtıfWoS6OpenAlex7
İncele - MakaleYalnız künye2010Scopus SJRQ3Comparison of Hatching Performances and Yolk Sac Absorptions of Black Sea Trout (Salmo trutta labrax Pallas, 1811), Brook Trout (Salvelinus fontinalis Mitchill, 1814) and Their Hybrid
Basçinar, Nadir; Kocabas, Mehmet; Sahin, Sebnem Atasaral; Okumus, Ibrahim
The aims of this study were to determine hatching performance, body and yolk weight at hatching, the growth rate during the yolk absorption and yolk conversion efficiency of Black Sea trout, brook trout and their hybrid larvae, and to compare the relationships between length, total wet weight, dry yolk body weights of alevins and degree-days. The Black Sea trout egg has shorter incubation duration than brook trout and their hybrid. Survival from fertilization to swim-up of brook trout, Black Sea trout, and hybrid were 45.8%, 54.3% and 30.7%, respectively. Length, total wet weight, dry larva weights, and dry yolk weights of brook trout, Black Sea trout and hybrid exhibited a linear relationship with degree-days; dry yolk weight decreased, while length, total wet weight and dry body weight increased with degree-days. The linear regression parameters excluding length slope were significantly different. Length and weight increase as well as growth rates, daily yolk sac consumption and yolk sac efficiency values were calculated as 0.21 mm/day, 0.63 mg/day, 0.30 mg/day, and 0.61 for brook trout; 0.19 mm/day, 0.87 mg/day, 0.60 mg/day, and 0.76 for Black Sea trout, and 0.20 mm/day, 0.45 mg/day, 0.28 mg/day, and 0.46 for hybrid, respectively.
AtıfWoS5İncele - MakaleYalnız künye2010Scopus SJRQ3Effect of Duo-Culture on Growth Performance of Brook Trout (Salvelinus fontinalis Mitchill, 1814) and Black Sea Trout (Salmo trutta labrax Pallas, 1811) in Tank Reared Condition
Basçinar, Nadir; Sahin, Sebnem Atasaral; Kocabas, Mehmet
The objectives of the present study were to compare growth performance and feed conversion ratios of brook trout (Salvelinus fontinalis) and Black Sea trout (Salmo trutta labrax) in monoculture and duo-culture tank reared conditions. The fish were about 9-month-old hatchery reared brook trout and Black Sea trout with initial weights of 24.18 +/- 0.64 (n=60) and 23.87 +/- 1.11 (n=60) g, respectively. Fish were kept in 0.2 m(3) fiberglass tanks. Nine tanks were used and the fish were equally allotted to 3 groups with tree replicates and fed for 240 days. Each tank contained 20 fish from each species for monoculture and 10+10 fish from each species for duo-culture. At the end of the study, mean live weights of brook trout and Black Sea trout increased to 265.47 +/- 17.25 g and 206.18 +/- 2.95 g in monoculture. 235.53 +/- 10.25 g and 222.47 +/- 1429 g in duo-culture, respectively, and significant differences were found among the groups (P<0.01). The highest and lowest specific growth rates were found in brook trout and Black Sea trout in monoculture (P<0.01), respectively. The highest and lowest final condition factors were calculated in duo-culture for brook trout and in monoculture for Black Sea trout (P<0.01), respectively. The feed conversion ratio (FCR) for Black Sea trout was higher than it was for the other groups (P < 0.01).
AtıfWoS11İncele