the effect of dietary supplementation of l-carnitine on resistance to temperature and salinity stresses in sobaity seabream sparidentex hasta

Authors

ام البنین طاهری کندر

دانشجوی کارشناسی ارشد، گروه شیلات، دانشکدة کشاورزی و منابع طبیعی، دانشگاه هرمزگان، ایران میر مسعود سجادی

دانشیار گروه شیلات، دانشکدۀ منابع طبیعی، دانشگاه هرمزگان، ایران ایمان سوری نژاد

استادیار گروه شیلات، دانشکدة علوم و فنون دریایی و جوی، دانشگاه هرمزگان، ایران عبدالرسول دریایی

دکتری تغذیة دام و آبزیان، مربی پژوهشی، سازمان تحقیقات کشاورزی، هرمزگان، ایران فرشته خادمی

abstract

to investigate the effect of dietary supplementation of l-carnitine on resistance to temperature and salinity stresses in sobaity fry, an experiment was carried out with 240 pieces of fish with average initial weight of 3.01±0.03 g for 10 weeks. experimental treatments were consisted of four levels of 0, 500, 1000 and 1800 (respectively control, lc500, lc1000 and lc1800) mg l-carnitine per kg of diet, each with three replicates in a completely randomized design. during the experimental period, feeding was performed by hand and the fish were daily fed to satiation at three intervals. at the end of the experimental period, fish were exposed to two temperatures of 15 and 37°c for 30 minutes for thermal stress test and to two salinity levels of 12 and 70 ppt for one hour for salinity stress test. the results showed that in lc1000 and lc1800 treatments, the resistance to high temperature, low temperature and high salinity stresses increased significantly compared to control group (p0.05). the results of present research revealed that the dietary supplementation of l-carnitine could favorably affect the resistance to temperature and salinity stresses in sobaity fry. between the different levels of l-carnitine used, the most effective dose on resistance to temperature and salinity stresses in sobaity seabream fry was the level of 1000 mg l-carnitine per kg of diet.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

The effect of dietary supplementation of L-carnitine on growth indices and survival rate in Sobaity seabream Sparidentex hasta

One of the major issues in aquaculture is to keep balance between growth rate of fish and optimal use of consumed food. L-carnitine is considered an effective food supplement for fish growth. Sobaity seabream is one of the commercially important species in the Persian Gulf that is highly considered in aquaculture too. Growth indices and survival rate of 240 Sobaity fingerlings with mean weight ...

full text

Effects of dietary soybean lecithin on growth performance, feed utilization and hematological parameters of juvenile sobaity seabream (Sparidentex hasta)

The current study aimed to evaluate effects of four levels (0, 2, 4 and 6 % of diet) of soybean lecithin in the isoproteic and isoenergitic (50% protein and 18.5 kj/g) diets on growth performance, feed utilization and hematological parameters of juvenile sobaity seabream (Sparidentex hasta) with initial weight of 37.9±0.16 g. At the end of 56 days of feeding trial, results showed that growth pe...

full text

the effect of dietary supplementation of probiotic "protexin" on growth performance and survival rate in sobaity seabream (sparidentex hasta)

the effect of a commercial probiotic (protexin) on growth performance and survival rate in sobaity sparidentex hasta was investigated. 240 fish with average weight of 2.99±0.87g were treated for 10 weeks. this study was carried out in a completely random design with 12 experimental groups, in 4 treatments each with 3 replicates. experimental groups were consisted of four levels of 0.0, 0.5, 1.0...

full text

the washback effect of discretepoint vs. integrative tests on the retention of content in knowledge tests

در این پایان نامه تاثیر دو نوع تست جزیی نگر و کلی نگر بر به یادسپاری محتوا ارزیابی شده که نتایج نشان دهندهکارایی تستهای کلی نگر بیشتر از سایر آزمونها است

15 صفحه اول

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

My Resources

Save resource for easier access later


Journal title:
شیلات

جلد ۶۷، شماره ۴، صفحات ۵۸۵-۵۹۷

Keywords
[ ' t o i n v e s t i g a t e t h e e f f e c t o f d i e t a r y s u p p l e m e n t a t i o n o f l ' , ' c a r n i t i n e o n r e s i s t a n c e t o t e m p e r a t u r e a n d s a l i n i t y s t r e s s e s i n s o b a i t y f r y ' , ' a n e x p e r i m e n t w a s c a r r i e d o u t w i t h 2 4 0 p i e c e s o f f i s h w i t h a v e r a g e i n i t i a l w e i g h t o f 3 . 0 1 ± 0 . 0 3 g f o r 1 0 w e e k s . e x p e r i m e n t a l t r e a t m e n t s w e r e c o n s i s t e d o f f o u r l e v e l s o f 0 ' , 5 0 0 , ' 1 0 0 0 a n d 1 8 0 0 ( r e s p e c t i v e l y c o n t r o l ' , ' l c 5 0 0 ' , ' l c 1 0 0 0 a n d l c 1 8 0 0 ) m g l ' , ' c a r n i t i n e p e r k g o f d i e t ' , ' e a c h w i t h t h r e e r e p l i c a t e s i n a c o m p l e t e l y r a n d o m i z e d d e s i g n . d u r i n g t h e e x p e r i m e n t a l p e r i o d ' , ' f e e d i n g w a s p e r f o r m e d b y h a n d a n d t h e f i s h w e r e d a i l y f e d t o s a t i a t i o n a t t h r e e i n t e r v a l s . a t t h e e n d o f t h e e x p e r i m e n t a l p e r i o d ' , ' f i s h w e r e e x p o s e d t o t w o t e m p e r a t u r e s o f 1 5 a n d 3 7 ° c f o r 3 0 m i n u t e s f o r t h e r m a l s t r e s s t e s t a n d t o t w o s a l i n i t y l e v e l s o f 1 2 a n d 7 0 p p t f o r o n e h o u r f o r s a l i n i t y s t r e s s t e s t . t h e r e s u l t s s h o w e d t h a t i n l c 1 0 0 0 a n d l c 1 8 0 0 t r e a t m e n t s ' , ' t h e r e s i s t a n c e t o h i g h t e m p e r a t u r e ' , ' l o w t e m p e r a t u r e a n d h i g h s a l i n i t y s t r e s s e s i n c r e a s e d s i g n i f i c a n t l y c o m p a r e d t o c o n t r o l g r o u p ( p 0 . 0 5 ) . t h e r e s u l t s o f p r e s e n t r e s e a r c h r e v e a l e d t h a t t h e d i e t a r y s u p p l e m e n t a t i o n o f l ' , ' c a r n i t i n e c o u l d f a v o r a b l y a f f e c t t h e r e s i s t a n c e t o t e m p e r a t u r e a n d s a l i n i t y s t r e s s e s i n s o b a i t y f r y . b e t w e e n t h e d i f f e r e n t l e v e l s o f l ' , ' c a r n i t i n e u s e d ' , ' t h e m o s t e f f e c t i v e d o s e o n r e s i s t a n c e t o t e m p e r a t u r e a n d s a l i n i t y s t r e s s e s i n s o b a i t y s e a b r e a m f r y w a s t h e l e v e l o f 1 0 0 0 m g l ' , ' c a r n i t i n e p e r k g o f d i e t . ' ]

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023