Longitudinal changes and consistency in male physical and behavioural traits have implications for mating success in the grey seal (Halichoerus grypus)
Longitudinal changes and consistency in male physical and behavioural traits have implications for mating success in the grey seal (Halichoerus grypus)
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雄性身体和行为特征的纵向变化和一致性对灰海豹（Halichoerus grypus）的交配成功具有影响
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
D. Boness
中科院分区：
文献类型：
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作者：
D. Lidgard;W. Bowen;D. Boness
我们研究了20只雄性灰海豹（Hali- choerus grypus（Fabricius，1791））的身体和行为特征的年龄相关变化和一致性，以及在加拿大Sable岛连续四个繁殖季节中交配成功率（参加发情雌性的数量）的代表意义。在整个研究中，年轻男性（10-15岁）的体重增加，而老年男性（23-31岁）的体重减少。体长是一个重要的决定因素的任期（在一个网站之间的女性花费的时间）和所有年龄段的男性表现出高度的一致性，在任期内（r = 0.40-0.50）。在年轻男性中，我们的成功代理表现出了很强的关系与到达体重，也表现出了高水平的一致性（r = 0.50）。没有测量的物理特性解释的变化，成功表现出交配策略，不涉及任期，这可能是由于这些策略的机会主义性质。年轻的雄性灰海豹由于身体状态的变化而表现出与年龄相关的成功改善，而在以后的生活中，身体特征的影响力较小，这表明非身体特征可能会弥补身体状态恶化及其对雄性成功的影响。
We examined age-related changes and consistency in physical and behavioural traits of 20 male grey seals (Hali- choerus grypus (Fabricius, 1791)) and implications for a proxy of mating success (number of oestrous females attended) over four successive breeding seasons on Sable Island, Canada. Across the study, young males (10-15 years) gained body mass, while old males (23-31 years) lost body mass. Body length was an important determinant of tenure (time spent at a site among females) and males of all ages exhibited a high level of consistency in duration of tenure (r = 0.40-0.50). In young males, our proxy of success showed a strong relationship with arrival body mass and also exhibited a high level of consistency (r = 0.50). None of the physical traits measured explained variation in success by exhibiting mating tactics that did not involve tenure, which is likely due to the opportunistic nature of those tactics. Whereas young male grey seals ex- hibited age-dependent improvements in success owing to changes in their physical state, later in life physical traits were less influential and suggest that nonphysical traits may compensate for a deteriorating physical state and its impact on male suc- cess.