The feeding strategy of Rainbow trout escaped from sea cages on the coast of Mazandaran
The present study was conducted to determine the exotic fish food strategy of rainbow trout escaped from cultivating cages located in the coast of Mazandaran.
A total of 90 specimens of this species were collected during the period from September 2017 to May 2018 from bony fish from west to central coast of Mazandaran. Samples were biomediated and the age was determined by scales.
The relative frequency of food items were Balanus glandula, Clupeonella cultriventris, Cerastoderma lamarcki, Neogobius fluviatilis, Atherina caspia, Chelon saliens, Chinavia hilaris, Taxiphyllum barbieri, Rutilus kutum, Cumacea, Syngnathus caspius and Gasterosreus aculeatus, respectively. The result showed that a wide range of food was more central than the west, the fullness index in the female was more than male and in age groups older than 2 and 3 is more than 1 (p>0.05). The fullness index, especially in the spring, increased significantly, the presence of B. glandula more than C. cultriventris, but its relative importance was less than C. cultriventris (p> 0.05).
This fish has a carnivorous behavior and uses a wide range of foods, so it is possible to compete with many species of Caspian Sea fish such as Salmo caspius. The effects of the adaptations and behavioral, physiological and ecological mechanisms, C. cultriventri and B. glandula were more important in fish feeding.
پرداخت حق اشتراک به معنای پذیرش "شرایط خدمات" پایگاه مگیران از سوی شماست.
اگر عضو مگیران هستید:
اگر مقاله ای از شما در مگیران نمایه شده، برای استفاده از اعتبار اهدایی سامانه نویسندگان با ایمیل منتشرشده ثبت نام کنید. ثبت نام
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.