为落实胡锦涛总书记关于加强未成年人思想道德教育和加强网络文化建设的重要讲话精神,中国中学生作文大赛的冒万网站"我 i 作文网"(www.wi zw.cn)随着中国中学生作文大赛正式启动也于9月21日正式开网。"我 i 作文网"...为落实胡锦涛总书记关于加强未成年人思想道德教育和加强网络文化建设的重要讲话精神,中国中学生作文大赛的冒万网站"我 i 作文网"(www.wi zw.cn)随着中国中学生作文大赛正式启动也于9月21日正式开网。"我 i 作文网"设有:大赛介绍、最新动态、获奖作文、命题辅导、历届回顾等栏目。"我 i 作文网"除了报道作文大赛的主要活动情况外,还开设了各赛区的联动网,详尽介绍全国19个赛区(包括香港、台湾)的最新情况报道。展开更多
Prey choice is often evaluated at the species or population level. Here, we analyzed the diet of octopuses of different populations with the aim to assess the importance of individual feeding habits as a factor affect...Prey choice is often evaluated at the species or population level. Here, we analyzed the diet of octopuses of different populations with the aim to assess the importance of individual feeding habits as a factor affecting prey choice. Two methods were used, an assessment of the extent to which an individual octopus made choices of species representative of those population （PSi and IS） and 25% cutoff values for number of choices and percentage intake of individual on their prey. In one population of Octopus cfvulgaris in Bermuda individuals were generalist by IS=0.77, but most chose many prey of the same species, and were specialists on it by 〉75% intake. Another population had a wider prey selection, still generalist with PSi=0.66, but two individuals specialized by choices. In Bonaire, there was a wide range of prey species chosen, and the population was specialists by IS=0.42. Individual choices revealed seven specialists and four generalists. A population of Octopus cyanea in Hawaii all had similar choices of crustaceans, so the population was generalist by IS with 0.74. But by individual choices, three were considered a spe-cialist. A population of Enteroctopus dofleini from Puget Sound had a wide range of preferences, in which seven were also spe-cialists, IS=0.53, By individual choices, thirteen were also specialists. Given the octopus specialty of learning during foraging, we hypothesize that both localized prey availability and individual personality differences could influence the exploration for prey and this translates into different prey choices across individuals and populations showed in this study.展开更多
文摘为落实胡锦涛总书记关于加强未成年人思想道德教育和加强网络文化建设的重要讲话精神,中国中学生作文大赛的冒万网站"我 i 作文网"(www.wi zw.cn)随着中国中学生作文大赛正式启动也于9月21日正式开网。"我 i 作文网"设有:大赛介绍、最新动态、获奖作文、命题辅导、历届回顾等栏目。"我 i 作文网"除了报道作文大赛的主要活动情况外,还开设了各赛区的联动网,详尽介绍全国19个赛区(包括香港、台湾)的最新情况报道。
文摘Prey choice is often evaluated at the species or population level. Here, we analyzed the diet of octopuses of different populations with the aim to assess the importance of individual feeding habits as a factor affecting prey choice. Two methods were used, an assessment of the extent to which an individual octopus made choices of species representative of those population （PSi and IS） and 25% cutoff values for number of choices and percentage intake of individual on their prey. In one population of Octopus cfvulgaris in Bermuda individuals were generalist by IS=0.77, but most chose many prey of the same species, and were specialists on it by 〉75% intake. Another population had a wider prey selection, still generalist with PSi=0.66, but two individuals specialized by choices. In Bonaire, there was a wide range of prey species chosen, and the population was specialists by IS=0.42. Individual choices revealed seven specialists and four generalists. A population of Octopus cyanea in Hawaii all had similar choices of crustaceans, so the population was generalist by IS with 0.74. But by individual choices, three were considered a spe-cialist. A population of Enteroctopus dofleini from Puget Sound had a wide range of preferences, in which seven were also spe-cialists, IS=0.53, By individual choices, thirteen were also specialists. Given the octopus specialty of learning during foraging, we hypothesize that both localized prey availability and individual personality differences could influence the exploration for prey and this translates into different prey choices across individuals and populations showed in this study.
