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我都同意你的说法:但事实并不是这么简单;我只是想看你的看法.(收入时按：小豹子当时差点晕过去:P
Nathan C. Koeniger
5351 South Garland Way
Littleton, CO 80123, USA
natek@holly.colostate.edu
Colonies can be separated into two groups: single foundress (monogyny) and multiple foundress (polygyny). Moreover, some queens are accompanied in nest founding by workers from the mother colony, while others do it on their own but later rely on their first offspring to help out (Tschinkel 209). Monogyny is often associated with queens who found a colony without the help of workers from the mother colony (Tsuji 84). Conversely, polygyny is often associated with queens that require the help of workers from the mother colony (Tsuji 84). This begs the question: what factors favor each of these different strategies (Tsuji 84)? Which system is more efficient? Which system yields a larger number of offspring?
One could conclude that polygyny is less advantageous than monogyny for individual queens; due to the fact that the degree of genetic relatedness of a queen to a worker is less in colonies that exhibit polygyny (Tsuji 83). Obviously, queens want their offspring to be as genetically similar to themselves as possible. Another disadvantage to polygyny is that queens may be aggressive toward one another after the first workers have hatched and some if not all less dominant queens may be killed by the workers (Sommer 287). This is the case in the ant Lasius niger (Sommer 287). Furthermore, polygynous queens reproductive period is shorter than that of monogynous queens (Tsuji 84). Monogynous queens produce more progeny over the course of their life span; which is also longer than that of polygynous queens (Tsuji 84).
On the other hand, polygyny must offer some advantage over monogyny or ants would not exhibit this behavior. For instance: "Polygyny is widespread in ants...(Ito 83)." In fact: "Sometimes polygynous and monogynous biotypes coexist, even within the same species... (Tsuji 84)."
[ 此消息由 蚁司令 在 2003-02-05.20:25:58 编辑过 ] | 最初发表时间：2005-1-12 |  | | 未填 |
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