Kim Sin-Yeon, Álvarez-Quintero Náyade, Metcalfe Neil B
Grupo Ecoloxía Animal Torre CACTI Centro de Investigación Mariña Universidade de Vigo Vigo Spain.
Institute of Biodiversity, Animal Health and Comparative Medicine University of Glasgow Glasgow UK.
Ecol Evol. 2022 Feb 14;12(2):e8581. doi: 10.1002/ece3.8581. eCollection 2022 Feb.
In animals living in groups, the social environment is fundamental to shaping the behaviors and life histories of an individual. A mismatch between individual and group behavior patterns may have disadvantages if the individual is incapable of flexibly changing its state in response to the social environment that influences its energy gain and expenditure. We used different social groups of juvenile three-spined sticklebacks () with experimentally manipulated compositions of individual sociability to study the feedback between individual and group behaviors and to test how the social environment shapes behavior, metabolic rate, and growth. Experimentally created unsociable groups, containing a high proportion of less sociable fish, showed bolder collective behaviors during feeding than did corresponding sociable groups. Fish within groups where the majority of members had a level of sociability similar to their own gained more mass than did those within mismatched groups. Less sociable individuals within sociable groups tended to have a relatively low mass but a high standard metabolic rate. A mismatch between the sociability of an individual and that of the majority of the group in which it is living confers a growth disadvantage probably due to the expression of nonadaptive behaviors that increase energetic costs.
在群居动物中，社会环境对于塑造个体的行为和生活史至关重要。如果个体无法根据影响其能量获取和消耗的社会环境灵活改变自身状态，那么个体与群体行为模式之间的不匹配可能会带来不利影响。我们使用了不同社会群体的幼年三刺鱼（），通过实验操纵个体社交性的组成，来研究个体与群体行为之间的反馈，并测试社会环境如何塑造行为、代谢率和生长。实验创建的不合群群体，其中包含高比例社交性较低的鱼类，在进食期间表现出比相应合群群体更大胆的集体行为。群体中大多数成员的社交性水平与其自身相似的鱼类比不匹配群体中的鱼类体重增加更多。合群群体中社交性较低的个体往往体重相对较低，但标准代谢率较高。个体的社交性与其所生活群体中大多数成员的社交性不匹配可能会导致生长劣势，这可能是由于表达了增加能量消耗的非适应性行为。
