几种影响紫贻贝幼贝足丝分泌的环境因素分析OA北大核心

To study the effects of environmental factors such as temperature,salinity,light,starvation,exposure to air,and ammonia-nitrogen on the productivity of byssus in Mytilus galloprovincialis,the juvenile blue mussels ob-tained from the cultivation rafts of Rizhao,Shandong Province were selected as research subjects.The two-factor interaction experiments between different temperatures(17℃,22℃,and 27℃),salinity concentrations(20‰,25‰,and 30‰),light intensities(10 000,and 10 000 lx),starvation times(0,24,48 h),air-exposure durations(0,24,48 h),and ammonia-nitrogen levels(0,15,and 30 mg/L)were conducted using block design.Both temperature and salinity significantly impacted productivity(P<0.01).Byssus production in the 27℃and 30%salinity group was markedly lower than other groups at all time points(P<0.05).Within the experimental ranges,temperature and salinity showed a significant weak negative correlation(r=-0.11/-0.16,P<0.05)with byssus production.The light had a remarkable impact on byssus production(P<0.01),whereas short-term starvation had no significant effect(P>0.05).The dark group(10 lx)demonstrated a markedly elevated production of byssus than other groups;there was a weak correlation between light and byssus production(r=0.14,P<0.01).Air exposure and ammo-nia-nitrogen remarkably negatively influenced byssus production(P<0.05).High ammonia-nitrogen(30 mg/L)and prolonged air exposure(48 h)significantly constricted productivity(r=-0.09,P<0.05).These results can provide useful references for the practices of seedling transportation,clamping,and healthy cultivation of blue mussels.