Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)
- Volume 15 Issue 1
- /
- Pages.47-51
- /
- 1982
- /
- 0374-8111(pISSN)
- /
- 2287-8815(eISSN)
The Growth of Tilapia in a Closed Water Recirculating System without Filter Bed
무여과조 순환수 사육장치내에서의 Tilapia의 성장
- KIM In-Bae (Department of Aquaculture, National Fisheries University of Busan) ;
- KHANG Seokjoong (Department of Aquaculture, National Fisheries University of Busan)
- Published : 1982.01.01
Abstract
Red tilapia fingerlings were tested for 45 days on the growth rate in a closed recirculating water system omitting filter bed and was compared with common carp fingerlings grown together in the same tank and also with red tilapia fingerlings grown in a well conditioned conventional pond. The tank water was kept in deepgreen colour by heavy phytoplankton bloom during the most of the experimental period and duckweeds, Lemna sp. and water hyacinth, Eichhornia crassipes were put to grow in the parts of the water system. Total ammonia level in the tank was mostly kept at about 5 to 7 ppm, with a fluctuation between 3.4 and 11.2 ppm. Average daily growth rate of the tilapia in the experimental tank was
1981년 여름 폐쇄식 순환사육 장치에서 붉은 Tilapia정어를 잉어정어와 혼합하여 45일간 사육 실험을 행하여 그 성신 결과를 비교 검토하고 또한 호적조건의 노지에서 성장한 붉은 Tilapia정어의 성장과도 비교하여 보았다. 탱크는 대 부분의 실험기각동안 심한 식물성 Plank-ton의 대량 번식으로 수색이 짙은 녹색으로 유가되었으며, 사육장치 일부에는 개구리밥 (Lemma Sp.)과 배옥잠 (Water hyacinth, Eichhornia crassipes)을 번식시켰다. 실험기간 동안 탱크내에서의 총암모니아농도는 최저 3.4ppm에서 최고 11.2ppm까지 나타났으나 대개
Keywords