2014年4月至2015年3月间的春、夏、秋、冬季,在安徽境内淮河流域的阜阳市阜南县曹集镇、淮南市潘集区平圩镇、滁州市凤阳县枣巷乡鲜活野生黄鳝收购点采集体长17.1~67.6cm,体质量23~327g的黄鳝338尾,调查黄鳝寄生虫的流行病学。结果共检...2014年4月至2015年3月间的春、夏、秋、冬季,在安徽境内淮河流域的阜阳市阜南县曹集镇、淮南市潘集区平圩镇、滁州市凤阳县枣巷乡鲜活野生黄鳝收购点采集体长17.1~67.6cm,体质量23~327g的黄鳝338尾,调查黄鳝寄生虫的流行病学。结果共检出4种寄生虫,其中隐藏新棘虫Pallisentis celatus感染率最高18.9%,大型多构槽绦虫Polyonchobothrium magnum 3.0%,幼旋尾线虫Polyoncobothrium magnum 3.0%,鳗鲡独孤吸虫Azygia anguillae 0.9%。隐藏新棘虫的感染率随体长增长而增加,随季节变化而异,即春季最高,秋季最低。黄鳝体长小于32.5cm时,无隐藏新棘虫感染;体长大于52.5cm时,隐藏新棘虫感染率最高32.26%。3个采样点黄鳝感染的寄生虫种类、感染率、平均丰度均不同。两种寄生虫同时感染黄鳝的比例较低。展开更多
Ecosystem accounting has become one of the key components in the revision of international statistical standards.Expansion of the System of Environmental-Economic Accounting for ecosystem services follows the rapid pr...Ecosystem accounting has become one of the key components in the revision of international statistical standards.Expansion of the System of Environmental-Economic Accounting for ecosystem services follows the rapid progress of science in this area as well as expanding applications to sustainability challenges.In this contribution,we discuss approaches to accounting of ecosystem assets as a natural capital basis that is critical for ecosystem service delivery.Based on examples from the Czech Republic,a Central European country,we illustrate the construction of ecosystem extent accounts based on the methodology of Land and Ecosystem Accounting.This analysis is complemented by monetary ecosystem asset accounting through quantification of the present value of future ecosystem service flows.Ecosystem condition is represented by the Mean Species Abundance indicator,which gauges the direction of ecosystem naturalness.Based on the demonstration of approaches to ecosystem asset accounting,we discuss selected aspects of ecosystem condition measurements,valuation,and policy implications of ecosystem asset accounting at the national level.展开更多
文摘2014年4月至2015年3月间的春、夏、秋、冬季,在安徽境内淮河流域的阜阳市阜南县曹集镇、淮南市潘集区平圩镇、滁州市凤阳县枣巷乡鲜活野生黄鳝收购点采集体长17.1~67.6cm,体质量23~327g的黄鳝338尾,调查黄鳝寄生虫的流行病学。结果共检出4种寄生虫,其中隐藏新棘虫Pallisentis celatus感染率最高18.9%,大型多构槽绦虫Polyonchobothrium magnum 3.0%,幼旋尾线虫Polyoncobothrium magnum 3.0%,鳗鲡独孤吸虫Azygia anguillae 0.9%。隐藏新棘虫的感染率随体长增长而增加,随季节变化而异,即春季最高,秋季最低。黄鳝体长小于32.5cm时,无隐藏新棘虫感染;体长大于52.5cm时,隐藏新棘虫感染率最高32.26%。3个采样点黄鳝感染的寄生虫种类、感染率、平均丰度均不同。两种寄生虫同时感染黄鳝的比例较低。
基金This work was supported by the Technology Agency of the Czech Republic,Omega program,under grant number[TD03000051]the Ministry of Education,Youth and Sport of the Czech Republic,National Sustainability Program I(NPU I),under grant number[LO1415].
文摘Ecosystem accounting has become one of the key components in the revision of international statistical standards.Expansion of the System of Environmental-Economic Accounting for ecosystem services follows the rapid progress of science in this area as well as expanding applications to sustainability challenges.In this contribution,we discuss approaches to accounting of ecosystem assets as a natural capital basis that is critical for ecosystem service delivery.Based on examples from the Czech Republic,a Central European country,we illustrate the construction of ecosystem extent accounts based on the methodology of Land and Ecosystem Accounting.This analysis is complemented by monetary ecosystem asset accounting through quantification of the present value of future ecosystem service flows.Ecosystem condition is represented by the Mean Species Abundance indicator,which gauges the direction of ecosystem naturalness.Based on the demonstration of approaches to ecosystem asset accounting,we discuss selected aspects of ecosystem condition measurements,valuation,and policy implications of ecosystem asset accounting at the national level.
