کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5539106 1552806 2018 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Growth and metabolic parameters of common snook juveniles raised in freshwater with different water hardness
ترجمه فارسی عنوان
پارامترهای رشد و پارامترهای متابولیسم نوجوانان معمولی اسنووک در آب شیرین با سختی آب مختلف
کلمات کلیدی
کلسیم؛ متابولیسم انرژی؛ Centropomus undecimalis
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
چکیده انگلیسی


- Usually there is mortality when common snook are transferred from seawater to freshwater.
- Transference of common snook to water with hardness of 100 mg CaCO3 L− 1 or higher increases survival.
- Plasma osmolality was not affected by transference to freshwater at any hardness tested.
- Common snook presented best growth at hardness of 100 mg CaCO3 L− 1 in freshwater.

The adaptation of common snook Centropomus undecimalis to low salinities and freshwater has being widely studied, but the definition of the best water hardness levels may facilitate the adaptation and growth of this species in freshwater. Consequently, the aim of this study was to evaluate survival, growth and metabolic parameters (blood glucose and osmolality and lactate in plasma and tissues) of common snooks raised in freshwater with different water hardness levels. In an acute experiment, juveniles were transferred from seawater 35 ppt to seawater 35 ppt (control) and freshwater at 20, 100, 250, 500 or 1000 mg CaCO3 L− 1. Mortality after 96 h was 100, 79.17, 58.33, 4,17 and 50%, respectively. In another experiment juveniles (initial weight 10.9 ± 1.5 g) were maintained for 60 days in water hardness of 100, 500 or 1000 mg CaCO3 L− 1 or seawater (control). No mortality was observed in this experiment. The best weight gain, specific growth rate and feed intake in freshwater (values not significantly different from seawater) was observed in common snooks kept at 100 mg CaCO3 L− 1. Blood and hepatic glucose did not differ significantly between treatments. Muscle glucose levels were significantly lower in fish kept at 100 and 1000 mg CaCO3 L− 1 than the other treatments. However, lactate levels were higher in the muscle of common snooks kept at 100 to 500 CaCO3 mg L− 1 and lactate in plasma was higher in those maintained at 1000 mg CaCO3 L− 1. Plasma osmolality was not affected significantly by treatments. In conclusion, 100 mg CaCO3 L− 1 is the best water hardness to raise common snooks in freshwater.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquaculture - Volume 482, 1 January 2018, Pages 31-35
نویسندگان
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