نوع مقاله : مقاله کامل علمی - پژوهشی
نویسندگان
1 دانشگاه علوم کشاورزی و منابع طبیعی گرگان
2 استاد گروه تکثیر و پرورش آبزیان، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.
3 دانشگاه عوم کشاورزی و منابع طبیعی گرگان
4 دانشگاه گرگان
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This evaluation was done with the aim of determining the level of activity of liver enzymes ALT and AST in the whole-body extract of the juvenile Caspian Roach (Rutilus caspicus) at the time of release during acclimation at different salinity levels, so as to be able to better evaluate their fate. In this study, juvenile fish were placed in two experimental groups including sudden and gradual changes in exposure to salinity. In the gradual transfer, first, the juvenile fish were acclimated and sampled from fresh water to water with a salinity of 8.5 grams per liter within 1, 24, 48, 72, 96 and 168 hours. Then the juvenile fish were transferred to 17 grams per liter water (Caspian sea salinity) and kept and sampled within 24, 48, 72, 96 and 168 hours. In sudden transfer, juvenile fish were directly transferred from fresh water to Caspian sea water and were kept and sampled within 24, 48, 72, 96 and 168 hours. The results showed that with the increase of acclimation time, the amount of changes of transaminases decreases after release in sea water, but it was not significant. The significant increase in ALT and AST of juvenile fish in sudden transfer within the first 24 hours of acclimation compared to gradual transfer shows the better ability of them to adapt to changes in salinity at the time of release.
کلیدواژهها [English]