Publication Date:
2021-05-19
Description:
The use correct of non-agricultural land due to saline and waternon fresh for rearing of aquatic animals, especially fish, in good seasons, can generate for employment and provide fertile ground .
This study aimed to assess the ability of Rainbow Trout reared in earthen ponds potential using brackish water stub area south of North Khorasan province in cold seasons (autumn and winter) have been conducted. Farming operations in three earthen ponds, each with an area of 3,000 square meters and two water wells within 160 days of the initial electric Bahdayt 8400 and 18100 µs was conducted. Average initial weight of juveniles when introduced into soil ponds 32.0±1.0 and 22.7±1/7 grams and density drop in the of ponds 5 and 7 number per cubic meters . Feeding on pond done recipes nutrition standards Related to fish size and water temperature was during the period culture . To help improve the water quality during the breeding ponds of cyclic change in volume of pond water (20-15%) and two aeration SPLASH with errive fresh water to form rain fall in each pond was used.
The results obtained during the period of measurement water physico-chemical parameters (temperature, electrical conductivity, dissolved oxygen, nutrients, total dissolved substances, acidity) shows changes in the mean amplitude of these factors has been tolerated for raising trout The results showed that children reared trout have been introduced since the introduction of nteroperability with brackish water in the pond also grown to over 14 thousand have salt and water changes physical and chemical factors have endured.
The results showed that fish farming in addition to works by adapting the environment had to foster the growth of the pond water . So in 5 months, with a mean survival of 87 percent hindrance develop marketable size with an average weight of 340±12-390±13and 470 ±17grams and have a total production of more than 20 tonnes.
All of it has been confirmed, the study area (SFRAIEN)is very suitable for the breeding Rainbow trout of pond during the fall and winter seasons .
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Physico-chemical
;
Rainbow Trout
;
Adaptation
;
Culture
;
Brackish Water
;
Earthen ponds
;
Oncorhynchus mykiss
;
Saline water
;
Aquatic
;
Density
;
Survival
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
44pp.
