Behavioural type affects dominance and growth in staged encounters of cooperatively breeding cichlids
Behavioural type affects dominance and growth in staged encounters of cooperatively breeding cichlids
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行为类型影响合作繁殖慈鲷的阶段性遭遇中的优势和生长
DOI：
10.1016/j.anbehav.2010.11.001
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发表时间：
2011
期刊：
影响因子：
2.5
通讯作者：
D. Heg
中科院分区：
文献类型：
--
作者：
Thomas Riebli;Batur Avgan;Anna;Caroline Duc;M. Taborsky;D. Heg
在动物中，行为特性，如攻击倾向，往往是一致的，在整个生命周期，他们可能会形成一个行为综合征的一部分。研究了攻击倾向对协同繁殖丽鲷的优势度、竞争行为和生长的影响。我们测试了内在攻击倾向（1）是否影响配对比赛中的优势，（2）与攻击倾向匹配的伙伴相比，与不匹配的伙伴相比，在比赛中导致不同的攻击水平，以及（3）它如何影响攻击倾向匹配或不匹配的群体的增长率。内在攻击倾向首先用镜像测试进行评分，并分为高，中或低。此后，我们测试鱼与高或低的侵略性倾向与合作伙伴匹配的大小和匹配或不匹配的侵略性类型的配对比赛的住房。我们的得分是支配性，攻击性和服从性。正如所预测的那样，（1）优势地位在不匹配的比赛中比在匹配的比赛中更清楚地建立起来，（2）具有高攻击倾向的个体比具有低内在攻击性的鱼发起更多的攻击，这表明更高的升级倾向独立于赢或输的配对比赛。然而，与预期相反的是，（3）在非配对组中，低攻击性个体的生长速度比攻击性个体快，而在配对组中则相反。这表明，具有低攻击倾向的个体可能从冲突逃避中受益，这可能使他们在未来由于更大的体型而获得统治地位。
In animals, behavioural properties such as aggressive propensity are often consistent over a life span, and they may form part of a behavioural syndrome. We studied how aggressive propensity influences dominance, contest behaviour and growth in the cooperatively breeding cichlid fish Neolamprologus pulcher. We tested whether intrinsic aggressive propensity (1) influences dominance in paired contests, (2) causes different aggression levels in contests with partners matched for aggressive propensity compared to unmatched partners, and how it (3) affects growth rate in groups that were either matched or unmatched for aggressive propensity. Intrinsic aggressive propensity was first scored with a mirror test and classified as high, medium or low. Thereafter we tested fish with either high or low aggressive propensity with partners matched for size and either matched or unmatched for aggressive type in a paired contest for a shelter. We scored dominance, aggression and submission. As predicted, (1) dominance was more clearly established in unmatched than in matched contests and (2) individuals with high aggressive propensity launched more attacks overall than fish with low intrinsic aggressiveness, suggesting a higher propensity to escalate independently of winning or losing the paired contest. However, contrary to expectation, (3) individuals with low aggressiveness grew faster than aggressive ones in unmatched groups, whereas the opposite occurred in matched groups. This suggests that individuals with low aggressive propensity may benefit from conflict evasion, which might allow them to gain dominance in the future owing to larger body size.