摘要
对塘堰鲢、鳙、草鱼的体形系数研究得出:鲢、鳙、草鱼的体长系数K_1分别为0.166,0.168和0.145;肥瘦系数K_2分别为6.36,6.40和5.50。直接采用体重公式α=K_2·G^(1/3)的计算结果来设计网具的网目大小。对所研究的三层拖刺网和革新地曳网经1984、1985两年的8个不同塘堰面积,近100网次的试验,证明它们是塘堰轮捕轮放的新型网具。
A great number of experiments were carried out in 1984 and 1985 intesting the newly designed fishing gear for alternate fishing recruitment in eightkinds of ponds and weirs in aquaculture station, animal husbandry station, YoungPeople station and Huazhong Agricultural University. The results are summarizedas follows: 1. The cubic number coefficient (K_2) of silver carp, grass carp and bigheadcarp is 6.36, 5.50 and 6.40 respectively. 2. Trinal pulling gill net and reformatory shore landing seine are new fishinggear for alternate fishing-recruitment in ponds and weirs. Their mesh size appliesdirectly weight equation (a=K_2 3√G) and not decreasing 20-50% any more. 3. When web size (2a) are designed as 10cm, fishing size of silver carp, big-head carp are over 500 gram. 4. Fishing size were not selected by fisherman and fish remained in pondsgrew very good. 5. Output per ha pond may increase by 10% more. 6. The quality of the new fishing gear are light, simple and lower cost. 7. These fishing gear may be applied to all ponds and weirs over the country.
出处
《水产学报》
CAS
CSCD
北大核心
1989年第1期42-51,共10页
Journal of Fisheries of China
关键词
塘堰
轮捕轮放
拖刺网
pond and weir
alternate fishing--recruitment
trinal pulling gill net
reformatory shore landing seine
