Factors Affecting Interspecific Aggression in a Year-Round Territorial Species, the Jewel Damselfish
Factors Affecting Interspecific Aggression in a Year-Round Territorial Species, the Jewel Damselfish
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DOI：
10.1111/j.1439-0310.2012.02063.x
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发表时间：
2012-08-01
期刊：
影响因子：
1.7
通讯作者：
Ros, Albert F. H.
中科院分区：
文献类型：
--
作者：
Di Paola, Valentina;Vullioud, Philippe;Ros, Albert F. H.
脊椎动物生活在复杂的物种网络中，种间的相互作用是常见的。在某些情况下，这些种间相互作用中表现出的攻击行为与种内相互作用中表现出的攻击行为非常相似。种内攻击和种间攻击是否具有共同的因果关系，这仍然是一个悬而未决的问题。我们研究了一个全年的领土物种的宝石雀鲷，（Plectroglyphidodon lacrymatus），其中培养藻类，他们的饲料.领土持有人积极捍卫这些藻类是一个有吸引力的资源，许多其他物种.在这项研究中，我们记录了自由生活的个人的领土侵略，并记录了一个标准化的领土入侵测试圈养的个人的侵略性反应。实地观察表明，领土侵略有选择地针对食物竞争者。独立的大小的物种，侵略更频繁地对共同的物种在其领土。通过让宝石雀鲷面对一些新奇的物体（受试者经常或很少接触这些物体），实验证实了这种关系。我们认为，宝石雀鲷必须了解哪些物种是竞争对手，因此应该追逐。在一个标准化的入侵测试与圈养的个人，没有显着差异被发现在领土内或种间入侵者的反应。领土侵略和入侵都与血浆雄激素水平没有任何关系。总之，这些数据表明，经验可能是更重要的非季节性的领土侵略比循环荷尔蒙因素。
Vertebrates live in complex species networks in which interspecific interactions are common. In some contexts, the aggressive behaviours shown in these interspecific interactions are very similar to those shown in intraspecific interactions. It is still an open question whether intra- and interspecific aggression share common causality. We studied a year-round territorial species the jewel damselfish, (Plectroglyphidodon lacrymatus), which cultivate algae they feed on. Territory holders aggressively defend these algae that are an attractive resource for many other species. In this study, we recorded territorial aggression in free-living individuals and recorded aggressive responses to a standardized territorial intrusion test in captive individuals. Field observations indicated that territorial aggression was selectively targeted towards food competitors. Independent of the size of the species, aggression was more frequent towards common species around their territories. This relationship was confirmed experimentally by confronting the jewel damselfish with novel objects to which the subjects were exposed either frequently or rarely. We suggest that jewel damselfish have to learn which species are competitors and therefore should be chased. In a standardized intrusion test with captive individuals, no significant differences were found in territorial responses towards intra- or interspecific intruders. Neither territorial aggression nor the intrusion showed any relationship with plasma androgen levels. Together, these data suggest that experience might be more important in non-seasonal territorial aggression than circulating hormonal factors.