نوع مقاله : مقاله کامل
نویسندگان
1 دانشکده علوم دریایی ، گروه شیلات ، دانشگاه دریانوردی و علوم دریایی چابهار
2 واحد بهداشت و بیماریهای آبزیان، دانشکده دامپزشکی شیراز، دانشگاه شیراز
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The present study investigated the effects of Myrtus communis and Ferula assafoetida extracts on percentage of hatching and survival rate in the early growth stages of rainbow trout (Oncorhynchus mykiss) larvae compared with malachite green (MG). This study was carried out in Dalkhan propagation and cultivation farm, in Sepidan, Shiraz. To assess the percentage of hatching and survival rate in the early growth stage, Myrtus communis was used at 400 mg/L and Ferula assafoetida at 40 mg/L for 30 minutes per day and MG as the positive control at 2 mg/L for 20 minutes per day. Normal control without any treatment was also included. Each treatment trial was provided in three replicates. The obtained results showed that the mortality level in normal control was significantly higher than other groups in the hatching stage (p<0.05). Also, the mortality rate in eggs treated with Myrtus communis was significantly lower than both MG and Ferula assafoetida groups (p<0.05). No significant different was seen between MG and Ferula assafoetida groups (p>0.05). In addition, the mortality rate of the produced larvae was significantly higher in both Ferula assafoetida group and normal control groups than other two groups (p<0.05). The results showed that use of Myrtus communis at 400 mg/L is able to significantly improve the rate of rainbow trout eggs and larvae survival during incubation period. It can be compatibe with MG.
کلیدواژهها [English]