-The development rate of Labidocera euchaeta Giesbrecht in the Xiamen Harbor was studied in laboratory. The results showed that the development times of egg and larval stages ( D ) were significantly correlated with t...-The development rate of Labidocera euchaeta Giesbrecht in the Xiamen Harbor was studied in laboratory. The results showed that the development times of egg and larval stages ( D ) were significantly correlated with temperature ( T ), following the Belehradek function, D = α( T -7. 5)-1.0634. The development time from egg to larval stages and adult, as well as generation time can be predicted from the equation for egg development ( α=411/24) by appropriately multipling the constant (α) with a proportion. The development was not isochronal over the whole larval period. Durations of naupliar stages were short and quasi-isochronal, which favored their non-feeding development. In contrast, durations of copepodid stages (C) were long. CV had the longest duration followed by CI, both of which are considered as the critical stages in the larval development. The acclimation effect of the seasonal temperature on the development rate was also observed.展开更多
The concentration of PAHs in the surface seawater of the western Xiamen Harbor has been analysed in the paper. The PAHs concnetration at 9 station locations varies greatly within the range of 106.1ng/L ~ 4365ng/L. But...The concentration of PAHs in the surface seawater of the western Xiamen Harbor has been analysed in the paper. The PAHs concnetration at 9 station locations varies greatly within the range of 106.1ng/L ~ 4365ng/L. But PAHs pollution is slight as compared with that in similar areas in other parts of the world. PAHs stem mainly from oil pollution, urban and industrial discharges, and combustion of fuels.展开更多
文摘-The development rate of Labidocera euchaeta Giesbrecht in the Xiamen Harbor was studied in laboratory. The results showed that the development times of egg and larval stages ( D ) were significantly correlated with temperature ( T ), following the Belehradek function, D = α( T -7. 5)-1.0634. The development time from egg to larval stages and adult, as well as generation time can be predicted from the equation for egg development ( α=411/24) by appropriately multipling the constant (α) with a proportion. The development was not isochronal over the whole larval period. Durations of naupliar stages were short and quasi-isochronal, which favored their non-feeding development. In contrast, durations of copepodid stages (C) were long. CV had the longest duration followed by CI, both of which are considered as the critical stages in the larval development. The acclimation effect of the seasonal temperature on the development rate was also observed.
文摘The concentration of PAHs in the surface seawater of the western Xiamen Harbor has been analysed in the paper. The PAHs concnetration at 9 station locations varies greatly within the range of 106.1ng/L ~ 4365ng/L. But PAHs pollution is slight as compared with that in similar areas in other parts of the world. PAHs stem mainly from oil pollution, urban and industrial discharges, and combustion of fuels.
