Effect of red algal bloom on growth and production of carps

  • Ram Bhajan Mandal Agriculture and Forestry University, Rampur, Chitwan
  • Sunila Rai Agriculture and Forestry University, Rampur, Chitwan
  • Madhav Kumar Shrestha Agriculture and Forestry University, Rampur, Chitwan
  • Dilip Kumar Jha Agriculture and Forestry University, Rampur, Chitwan
  • Narayan Prasad Pandit Agriculture and Forestry University, Rampur, Chitwan
Keywords: Euglenophytes, Red pond, Carp polyculture, Water quality

Abstract

An experiment was carried to assess the effect of red algal bloom on growth and production of carp, water quality and profit from carp for 120 days at Aquaculture Farm of Agriculture and Forestry University, Chitwan. The experiment included two treatments: carp polyculture in non-red pond and carp polyculture in red pond with algal bloom each with three replicates. Carp fingerlings were stocked at 1 fish/m2 and fed with pellet containing 24% CP at 3% body weight. Net yield of rohu was found significantly higher (p<0.05) in non-red ponds (0.38±0.01 t ha-1) than red ponds (0.24±0.05 t ha-1). Survival of rohu (84.9±1.4%), bighead (95.2±2.0%) and mrigal (88.1±14.4%) were also significantly higher (p<0.05) in non-red ponds than red ponds. Red algal bloom affected DO, nitrate and chlorophyll-a, nitrite, total nitrogen, total phosphorus, total dissolved solids and conductivity. However, overall carp production and profit from carp remained unaffected.

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Abstract
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Published
2018-12-31
How to Cite
Mandal, R., Rai, S., Shrestha, M., Jha, D., & Pandit, N. (2018). Effect of red algal bloom on growth and production of carps. Our Nature, 16(1), 48-54. https://doi.org/10.3126/on.v16i1.22122
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Articles