排序方式: 共有2条查询结果,搜索用时 125 毫秒
1
1.
Bioaccumulation Factors (BAFs) and Biota to Sediment Accumulation Factors (BSAFs) for PCBs in pike and eels 总被引:1,自引:0,他引:1
Stuart J. Harrad David J. T. Smith 《Environmental science and pollution research international》1997,4(4):189-193
“Freely-dissolved” aqueous concentrations of 9 trichlorothrough heptachlorobiphenyls are reported, alongside those in sediments
and fish from the R. Severn. For most congeners, BSAFs and lipid-normalised BAFs for pike exceed those for eels. Whilst R.
Severn BSAFs are comparable with those for L. Ontario trout and New Bedford Harbour flounder, R. Severn BAFs are 1–2 orders
of magnitude lower. This discrepancy may be due to inter-species variability, as well as inter-laboratory differences between
operational definitions of “freely-dissolved” aqueous PCB, underlining that the same operational definition must be employed
if R. Severn BAFs are extrapolated elsewhere. For eels, correlation of Log Kow with Log BAF is better (R2 = 0.66) than with BSAF (R2 = 0.13), whilst similar correlation coefficients (R2 = 0.81 and 0.82) were observed for pike. When Log Kow is plotted against BSAF and Log BAF for both species combined, better correlation is observed for Log BAF (R2 = 0.65), than BSAF (R2 = 0.36). For both species combined, the observed relationship between Log BAF and Log Kow for trichloro-through heptachlorobiphenyls is: Log BAF = 0.96 * Log Kow −0.24. 相似文献
2.
Seasonality of spawning by tropical anguillid eels around Sulawesi Island, Indonesia 总被引:1,自引:0,他引:1
Wouthuyzen S Aoyama J Sugeha HY Miller MJ Kuroki M Minegishi Y Suharti SR Tsukamoto K 《Die Naturwissenschaften》2009,96(1):153-158
Remarkably little is known about the life histories of the many tropical anguillid eels distributed across the Indo-Pacific region, and since the Danish expedition to study eels in the region in 1928 and 1929, research on these eels has only begun again in recent years. Sampling for anguillid leptocephali in the Indonesian Seas has been carried out recently to learn about the spawning ecology and larval distributions of tropical eels there. The leptocephali of Anguilla marmorata, Anguilla bicolor pacifica, Anguilla borneensis, Anguilla interioris, and Anguilla celebesensis were collected around Sulawesi Island both in May 2001 and October of 2002. The development of genetic identification techniques has enabled these leptocephali to be identified to species, and their distributions and sizes during different seasons indicated that there are differing life history patterns among sympatric species in the region. A. celebesensis was found to have been spawning in Tomini Bay of northeastern Sulawesi Island in March and April 2001, but apparently, no spawning had occurred in the late summer and fall of 2002. Studies on anguillid glass eels have suggested that tropical anguillids may spawn throughout much of year, but our research on leptocephali in Tomini Bay and data on the downstream migration of tropical anguillids in the major tributary to Tomini Bay indicate that A. celebesensis may have a distinct seasonal pattern of spawning possibly related to the regional monsoon cycles. This is the first evidence of seasonality of spawning in tropical anguillid eels whose life histories are only just beginning to be revealed. 相似文献
1