Familiarity with adults, but not relatedness, affects the growth of juvenile red-backed salamanders (Plethodon cinereus)
Familiarity with adults, but not relatedness, affects the growth of juvenile red-backed salamanders (Plethodon cinereus)
复制标题
与成年红背蝾螈的熟悉程度（而非亲缘关系）会影响幼年红背蝾螈（Plethodon cinereus）的生长
DOI：
10.1007/s00265-008-0659-4
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发表时间：
2008
影响因子：
2.3
通讯作者：
P. Cabe
中科院分区：
文献类型：
--
作者：
E. Liebgold;P. Cabe
亲属关系和熟悉程度在影响个人成长和健康方面的相对作用并不容易解开。一个人不仅更有可能与邻近的同种动物有先前的行为互动，而且还可能与附近的同种动物有亲属关系。虽然一些研究推断，亲属歧视影响健身相关，但其他研究发现，熟悉程度本身可以减少攻击性互动，从而增加健身。这些研究都集中在同一年龄段的班级或团体。然而，许多动物与来自不同群体的同种动物相互作用。在许多种群中，灰背原齿鲨的成虫会在领地上保卫岩石和原木，以保持水分和食物资源。我们调查了P. cinereus的青少年是否在亲属或熟悉的成年人的存在下生长得更快。我们收集了在森林中相同的覆盖物下发现的成对的青少年和成年人（熟悉），以及在不同的覆盖物下发现的成对的青少年和成年人，相距约10米（不熟悉）。我们确定亲子关系和相关的成年少年对，然后将这些对半自然围隔17天。我们发现，青少年居住在熟悉的成年人有显着更大的增长质量和口鼻通风长度比青少年居住在2006年，但不是在2007年不熟悉的成年人。相关性对生长没有影响。此外，与成年人同居的青少年并不更有可能是他们的后代。至少在一定的环境条件下，与成年蝾螈的熟悉程度，独立于亲缘关系或亲子关系，促进了幼年蝾螈的生长。
The relative roles of kinship and familiarity in affecting an individual’s growth and fitness are not easy to disentangle. Not only is an individual more likely to have prior behavioral interactions with conspecifics in close proximity, it may also be related (in terms of kinship) to those nearby conspecifics. While some studies have inferred that kin discrimination affects fitness correlates, other studies found that familiarity alone can reduce aggressive interactions, thus increasing fitness. These studies have all focused on intra-age class pairs or groups. However, many animals interact with conspecifics from different cohorts. In many populations, adults of Plethodon cinereus territorially defend rocks and logs that retain moisture and food resources. We investigated whether juveniles of P. cinereus grew more in the presence of adults that were relatives or familiar. We collected pairs of juveniles and adults found under the same cover objects in the forest (familiar) and pairs of juveniles and adults found under different cover objects, approximately 10 m apart (unfamiliar). We determined parentage and relatedness of the adult–juvenile pairs and then placed these pairs in semi-natural mesocosms for 17 days. We found that juveniles housed with familiar adults had significantly greater increases in mass and snout–vent length than juveniles housed with unfamiliar adults in 2006 but not in 2007. Relatedness had no effect on growth. In addition, juveniles cohabitating with adults were not more likely to be their offspring. At least under certain environmental conditions, familiarity with adults, independent of relatedness or parentage, increased the growth of juvenile salamanders.