Apparent Nutrient Digestibility of Balanced Diets with Soy Bean Extract or Meat and Bone Meal in the Nile Tilapia (Oreochromis niloticus L.) Infected with Vibrio anguillarum
ENGİN, KENAN | YILMAZ, FERBAL ÖZKAN
Nile tilapia, Oreochromis niloticus L., infected with Vibrio anguillarum or not infected were fed balanced diets containing vegetal (solvent extracted soy bean meal (SBM)) or animal (meat and bone meal (MBM)) protein sources in order to demonstrate the apparent nutrient and energy digestibility. Regardless of protein sources in the diets, feed intake was lower in the infected group. Apparent nutrient (AD_{DM} and AD_{CP}) and energy digestibility (AD_{kJ}) values of Nile tilapia fed the SBM diet were significantly better (P < 0.05) than those fed the CONT and MBM diets and changed little between the measurement days in both groups (non-infected and infected). Although no visible symptoms associated with vibriosis were evident on either the skin or internal organs, the significantly lower (...
Seasonal variation of Hysterothylacium aduncum Nematoda Raphidascarididae infestation in sparid fishes in the Northeast Mediterranean Sea
Kalay Mustafa | Dönmez Ahmet Erdem | Koyuncu Cafer Erkin
The presence of a Raphidascarid parasitic nematode Hysterothylacium aduncum (Rudolphi, 1802) in the sparid fish Sparus aurata and Diplodus vulgaris was investigated in this study. A total of 471 individuals (208 Sparus aurata and 263 Diplodus vulgaris) collected for this purpose from the Gulf of Mersin between May 2003 and April 2004 were examined. Seasonal variation in the intensity (MI: mean ± SD) and prevalence (P: %) of the parasite were also determined and the highest P and MI values were found in June 2003 (3.5 ± 0.71 and 8.70%) for S. aurata and March 2004 (4.0 ± 0 and 19.5%) for D. vulgaris.