对虾综合养殖围隔中浮游细菌生产力的研究

A study on bacterioplankton productivity of experimental shrimp polyculture enclosures

用5个养虾实验围隔研究了对虾综合养殖生态系浮游细菌的生产力。结果表明,生产量(μgC/L·d)变动在90～909之间,平均为292±141。对虾-罗非鱼-缢蛏混养及对虾-扇贝混养生态系细菌生产量相对稳定;对虾单养及对虾-缢蛏、对虾-罗非鱼混养生态系细菌生产量却变化较大。细菌生产量与水温、细菌生物量及浮游生物群落呼吸量均呈现显著相关性。细菌的日P/B系数变化在0.22～1.67(d-1)之间,平均为0.93±0.37(d-1)。细菌生产量与浮游植物毛生产量比值平均为0.15。

Bacterial productivity of shrimp polycultural ecosystems was studied with five experimental enclosures.The results showed that the bacterial production fluctuated from 90 to 909 μgC/L·d,with an average of 292±141 μgC/L·d.The bacterial productivity was stable in the enclosures stocked with a combination of shrimp( Penaeus chinensis ) tilapia( Oreochromis mossambicus O.niloticus ) tagelus( Sinonovacula constricta ),and those of shrimp scallop( Argopecten irradians ),while is was more changeable in the enclosures stocked only with shrimp or with a combination of shrimp tagelus and of shrimp tilapia.Bacterial production correlated significantly with water temperature,bacterial biomass and the rates of plankton community respiration.The bacterial daily P/B coefficient fluctuated from 0.22 to 1.67(d\+ -1 ),with an average of 0.93±0.37 (d -1 ).The average ratio of bacterial production to phytoplankton gross production was measured as 0.15.