PLANKTONIC FLORA AND THE ROLE OF ITS ON YIELD OF SILVER CARP (HYPOPHTHALMICHTHYS MOLITRIX) IN WARM WATER FISH POND

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GHELICHI A.; JAFARI M.; KAMALI SANZIGHI M.

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Journal: Journal of Aquaculture Development Year:2017 | Volume:10 | Issue:4 Page(s): 91-102

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Title

PLANKTONIC FLORA AND THE ROLE OF ITS ON YIELD OF SILVER CARP (HYPOPHTHALMICHTHYS MOLITRIX) IN WARM WATER FISH POND

Author(s)

GHELICHI A. | JAFARI M. | KAMALI SANZIGHI M. | Issue Writer Certificate

Keywords

EAST OF GOLESTAN PROVINCEQ2

PLANKTONIC FLORAQ2

SILVER CARP (HYPOPHTHALMICHTHYS MOLITRIX)Q2

WARM WATER FARMQ2

Abstract

The present study was formulated to determine PLANKTONIC FLORA of WARM WATER FARMs following introduction of fertilizers as well as specify silver carp growth in terms of phytoplankton composition and some physicochemical factors in water in such farms. For this, 4 WARM WATER FARMs each 12 ha were selected and 2400 silver carp fingerlings (120 gr) were introduced after preparation and water filling.7 tons/ha bovine fertilizer was used in the ponds. Urea (46% N active material), ammonium nitrate (35% N active material), and superphosphate triple (46% P2O5 active material) chemical fertilizers were adopted in order to provide nitrogen and phosphorus for phytoplankton. Fertilizer consumption was determined based upon Secchi depth and nitrogen and phosphorus in water. In order to determine planktonic composition of ponds, 5 water samples were drawn from 5 points of each pond; then, the samples were mixed and planktons were recognized in each sample via optical microscopy and planktonic predominance were recorded. Water sampling was performed once from mid-June to mid-September. Fish samples were drawn from each pond monthly and length and weight of the samples were recorded. According to the results obtained from the present study, 9 classes and 53 genera of phytoplankton were recognized. The classes Bacillariophyceae and Chlorophyceae had the most variable genera with 18 and 10 genera, respectively. The fish with predominant Cryptomonas had a rather high correlation (0.71). Furthermore, predominance of this phytoplankton increased with higher consumption of phosphate fertilizer. There was a high correlation between predominance of Cryptomonas and higher consumption of phosphate fertilizers (0.61). According to the results between different groups of phytoplankton, Cryptomonas can be considered as the best plankton for silver carp growth; silver carp growth in the ponds with predominance of Cryptomonas was significantly higher than others.

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APA: Copy

GHELICHI, A., JAFARI, M., & KAMALI SANZIGHI, M.. (2017). PLANKTONIC FLORA AND THE ROLE OF ITS ON YIELD OF SILVER CARP (HYPOPHTHALMICHTHYS MOLITRIX) IN WARM WATER FISH POND. JOURNAL OF AQUACULTURE DEVELOPMENT, 10(4), 91-102. SID. https://sid.ir/paper/241950/en

Vancouver: Copy

GHELICHI A., JAFARI M., KAMALI SANZIGHI M.. PLANKTONIC FLORA AND THE ROLE OF ITS ON YIELD OF SILVER CARP (HYPOPHTHALMICHTHYS MOLITRIX) IN WARM WATER FISH POND. JOURNAL OF AQUACULTURE DEVELOPMENT[Internet]. 2017;10(4):91-102. Available from: https://sid.ir/paper/241950/en

IEEE: Copy

A. GHELICHI, M. JAFARI, and M. KAMALI SANZIGHI, “PLANKTONIC FLORA AND THE ROLE OF ITS ON YIELD OF SILVER CARP (HYPOPHTHALMICHTHYS MOLITRIX) IN WARM WATER FISH POND,” JOURNAL OF AQUACULTURE DEVELOPMENT, vol. 10, no. 4, pp. 91–102, 2017, [Online]. Available: https://sid.ir/paper/241950/en

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