[Objective] The paper was to explore the species composition, number distribution and seasonal dynamics of fish eggs and larvae in Liaodong Bay in 2008. The protection and exploitation status of spawning ground in Lia...[Objective] The paper was to explore the species composition, number distribution and seasonal dynamics of fish eggs and larvae in Liaodong Bay in 2008. The protection and exploitation status of spawning ground in Liaodong Bay was analyzed, and the corresponding protection measures were put forward. [Methods] The species composition of fish eggs and larvae in spawning ground of Liaodong Bay was investigated by horizontal trawling associated with vertical trawling with zooplankton net in May, July, September and October in 2008. [Result] It was found that 7 724 eggs and 229 larvae of fishes belonging to 32 taxa were collected, in which 29 taxa were identified as species, belonging to 9 genera, 21 families and 28 orders, 2 taxa were identified to only family level, and one failed to be identified. The main spawning groups were Cynoglossus joyneri, Engraulis japonicus, Johnius belengerii, Larimichthys polyactis, Konosirus punctatus, Sardinella zunasi, and Scomberomorus niphonius, and the main spawning ground was found in northern waters and Changxing Island waters in Liaodao Bay. There was slightly less spawning species in 2008 compared with 1998, especially the number of fish eggs and larvae decreased greatly. [Conclusion] The effective measures for protection of spawning grounds in Liaodong Bay are suggested, including control of fishing intensity, development of artificial reefs, establishment of germplasm resources reserves, and standardization of compensation standards for marine ecological damage.展开更多
目的探讨超声微血流成像联合剪切波弹性成像在鉴别甲状腺超声影像报告和数据系统(thyroid imaging reporting and data system,TI-RADS)4类结节良恶性的应用价值。方法回顾性选取2021年11月至2022年12月在杭州市中医院诊断为美国放射学...目的探讨超声微血流成像联合剪切波弹性成像在鉴别甲状腺超声影像报告和数据系统(thyroid imaging reporting and data system,TI-RADS)4类结节良恶性的应用价值。方法回顾性选取2021年11月至2022年12月在杭州市中医院诊断为美国放射学会(American College of Radiology,ACR)TI-RADS 4类的114个甲状腺结节,所有结节均行超声微血流成像及剪切波弹性成像检查,并与手术病理结果对比,评估微血流成像、剪切波弹性成像及二者联合应用的诊断效能。结果114例甲状腺TI-RADS 4类结节中,良性结节35例,恶性结节79例,恶性结节微血流成像模式多为聚集中断征及穿支血管征,剪切波弹性成像Emax值对鉴别良恶性差异有统计学意义(P<0.05),并且恶性结节SWE Emax≥41.6 kPa;超声微血流成像联合剪切波弹性成像诊断甲状腺TI-RADS 4类结节的敏感度、特异性和准确性分别为96.20%、65.72%、86.84%,曲线下面积为0.810,敏感度、准确性均高于单一诊断模式,差异有统计学意义(P<0.05)。结论超声微血流成像联合剪切波弹性成像能提高甲状腺TI-RADS 4类结节的良恶性诊断效能,具有较高的诊断敏感度及准确性,有助于此类结节的无创性鉴别诊断,避免不必要的穿刺活检。展开更多
基金Supported by Special Fund for Scientific Research(Marine)in the Public Interest(201405010)
文摘[Objective] The paper was to explore the species composition, number distribution and seasonal dynamics of fish eggs and larvae in Liaodong Bay in 2008. The protection and exploitation status of spawning ground in Liaodong Bay was analyzed, and the corresponding protection measures were put forward. [Methods] The species composition of fish eggs and larvae in spawning ground of Liaodong Bay was investigated by horizontal trawling associated with vertical trawling with zooplankton net in May, July, September and October in 2008. [Result] It was found that 7 724 eggs and 229 larvae of fishes belonging to 32 taxa were collected, in which 29 taxa were identified as species, belonging to 9 genera, 21 families and 28 orders, 2 taxa were identified to only family level, and one failed to be identified. The main spawning groups were Cynoglossus joyneri, Engraulis japonicus, Johnius belengerii, Larimichthys polyactis, Konosirus punctatus, Sardinella zunasi, and Scomberomorus niphonius, and the main spawning ground was found in northern waters and Changxing Island waters in Liaodao Bay. There was slightly less spawning species in 2008 compared with 1998, especially the number of fish eggs and larvae decreased greatly. [Conclusion] The effective measures for protection of spawning grounds in Liaodong Bay are suggested, including control of fishing intensity, development of artificial reefs, establishment of germplasm resources reserves, and standardization of compensation standards for marine ecological damage.
文摘目的探讨超声微血流成像联合剪切波弹性成像在鉴别甲状腺超声影像报告和数据系统(thyroid imaging reporting and data system,TI-RADS)4类结节良恶性的应用价值。方法回顾性选取2021年11月至2022年12月在杭州市中医院诊断为美国放射学会(American College of Radiology,ACR)TI-RADS 4类的114个甲状腺结节,所有结节均行超声微血流成像及剪切波弹性成像检查,并与手术病理结果对比,评估微血流成像、剪切波弹性成像及二者联合应用的诊断效能。结果114例甲状腺TI-RADS 4类结节中,良性结节35例,恶性结节79例,恶性结节微血流成像模式多为聚集中断征及穿支血管征,剪切波弹性成像Emax值对鉴别良恶性差异有统计学意义(P<0.05),并且恶性结节SWE Emax≥41.6 kPa;超声微血流成像联合剪切波弹性成像诊断甲状腺TI-RADS 4类结节的敏感度、特异性和准确性分别为96.20%、65.72%、86.84%,曲线下面积为0.810,敏感度、准确性均高于单一诊断模式,差异有统计学意义(P<0.05)。结论超声微血流成像联合剪切波弹性成像能提高甲状腺TI-RADS 4类结节的良恶性诊断效能,具有较高的诊断敏感度及准确性,有助于此类结节的无创性鉴别诊断,避免不必要的穿刺活检。
