2005年暴雨对大伙房水库鲢、鳙产量的影响

根据1980-1987年大伙房水库用网箱不投饵养殖鲢Hypophthalmichthys molitrix、鳙Aristichthys nobilis 的平均生长规格或产量与该库区的水文条件进行回归分析,得出14个复回归方程.6年之后(1988-1993年),用6年来网箱养殖鲢、鳙鱼种的实际产量和生长验证了这14个复回归方程,发现其中用公式(11)(y1 =6.5792+7.5754x5-4.0407 x6,式中:y1 为鲢、鳙体重(g); x5为7-8月入库水量与同期平均库容之比;x6为7-8月出库水量与同期平均库容之比)计算出的鲢、鳙鱼种产量,有5年特别接近实际数据,计算的规格与生产实际规格呈极显著正相关(r=0.948,P<0.01).本研究中,作者根据1999-2006年该库区有关水文资料,用公式(11)计算了各年用网箱不投饵养殖鲢、鳙的预期数据,并与实际鲢、鳙成鱼的捕捞量进行了比较.结果发现,2005年大水造成了严重的水质浑浊,但并没有影响2005年当年的渔获量,仅对2006年的鲢、鳙产量造成一定程度的减产.文中还对减产的原因进行了分析和讨论.

Influence of the torrential rain in 2005 on yields of silver carp and bighead carp in Dahuofang Reservoir

The 14 regression equations based on the data of silver carp Hypophthalmichthys molitrix and bighead carp Aristichthys nobilis fingerlings cultivated in net cages and the aquatic environment in Dahuofang Reservoir from 1980 to 1987 were examined here using the related data from 1988 to 1993.The good results were found by the Equation(11),the expected production being similar to actual data of 5 years among 6 years,indicating that there was a significant relationship(r=0.948,P<0.01) between the forecasted fi...