Shelter competition between resident male red swamp crayfish Procambarus clarkii (Girard) and conspecific intruders varying by sex and reproductive status
Shelter competition between resident male red swamp crayfish Procambarus clarkii (Girard) and conspecific intruders varying by sex and reproductive status
复制标题
雄性红沼泽小龙虾克氏原螯虾（Girard）与不同性别和繁殖状态的同种入侵者之间的住所竞争
DOI：
10.1080/10236240500376477
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发表时间：
2005
影响因子：
1
通讯作者：
H. V. Peeke
中科院分区：
文献类型：
--
作者：
M. Figler;G. Blank;H. V. Peeke
研究了繁殖活跃的雄性克氏原虾(Procambarus clarkii(Girard))在栖息1天后，通过雄性、母体和非母体雌性个体的一系列入侵，研究了它们的掩体防御动态。男性居民只对非母体女性表现出直接的竞争优势，并且在与非母体女性的遭遇中赢得的比例显著高于对男性或母体女性侵入者的遭遇。然而，对于男性或女性入侵者的成功率没有显著差异。针对男性入侵者的进一步实验表明，将男性先前居住的时间增加到2天或4天并不能显著提高居民成功遭遇的比例。最后的一项实验显示，雄性克氏松鼠的避难所保真度极低，这很可能是雄性对同种雄性和母体雌性的避难所防御不成功的原因。这些结果与过去的研究结果相结合，表明非母体雌性、幼体和最近蜕皮的同种最容易受到捕食和同类相食，因为雄性和母体雌性很容易在争夺避难所方面胜过非母体雌性，而成年雌性在竞争中胜过幼体。这些发现可能对克氏对虾水产养殖和一般管理具有一定的指导意义。
The shelter defense dynamics of reproductively active (Form I) male red swamp crayfish Procambarus clarkii (Girard) were investigated by staging serial intrusions by male, maternal or non-maternal female conspecifics after one day of residence. The male residents showed a direct contest advantage only against non-maternal females, and won a significantly higher proportion of the encounters against non-maternal females than against either male or maternal female intruders. However, there was no significant difference in success against male or maternal female intruders. Further experiments against male intruders showed that increasing male prior residence to either 2 or 4 days did not significantly improve the residents’ proportion of successful encounters. A final experiment revealed extremely low shelter fidelity in male P. clarkii, the most likely reason why male shelter defense against conspecific males and maternal females is not successful. These results, combined with those of past research, suggest that non-maternal females, juveniles and recently molted conspecifics are most vulnerable to predation and cannibalism, since males and maternal females easily out-compete non-maternal females for shelter, and adults out-compete juveniles. These findings may have implications for P. clarkii aquaculture and general management.