| Autor: |
Vanza, J. G., Solanki, H. G., Patel, P. P., Borichangar, R. V., Patel, M. R., Vala, R. B. |
| Předmět: |
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| Zdroj: |
Journal of Experimental Zoology India; Jul2022, Vol. 25 Issue 2, p2133-2139, 7p |
| Abstrakt: |
The present study evaluated the effect of different levels of salinities on growth and survival of Sillago sihama fish fry, commonly known as lady fish. Sillago fish fry were stocked at seven different salinities levels i.e., 0, 10, 20, 30, 40 50 and 60 ppt (T1, T2, T3 T4, T5, T6 and T7, respectively) and reared for a period of 60 days. Fish weighing 2.11 ± 0.02 g were stocked into twenty one 50-litres rectangular crates (triplicates) with 10 fish/crate. Filtered and disinfected rainwater was added to seawater in order to achieve different treatment salinities. During the experimental period, the fish were fed twice daily with a formulated diet (30% crude protein (CP) diet) @ 10% body weight. Growth in terms of body weight (g) and length (cm) were monitored fortnightly and survival (%) was estimated by counting fish from individual crate. A significant (p<0.05) decrease in growth and survival rates relative to the higher and lower salinities level was observed. Increase in salinity levels led to a significant reduction (p<0.05) in body weight and survival of the fish fry. At the end of the experimental period, treatment T4 and T3 recorded higher mean body weight (5.080 and 4.693 g) and higher periodical mean survival rate (96.67% and 93.33%), as compared to rest of the treatments. Similar trend was observed for fish body length, which was positively correlated (r2 = 0.993) with fish body weight. Lowest survival was observed in treatment T1 (0 ppt) and T7 (60 ppt). Fish reared in 20-30 ppt showed better growth and survival which might be due to improved osmoregulation. Results of the study also indicate that rearing of fish is not viable at lower salinities and higher salinities. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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