伴侣在爱达荷州作为父亲保险守护地面松鼠
1Section of Neurobiology and Behavior, Cornell University, Ithaca, New York 14853.
Nature
|March 30, 1989
概括
雄性爱达荷州地面松鼠在交配后保护伴侣,增加了他们的父权. 这种伴侣守护是爱达荷地松鼠的进化稳定策略,与贝尔丁的地松鼠不同.
科学领域:
- 行为生态学 行为生态学
- 进化生物学 进化生物学
- 生殖策略 生殖策略
背景情况:
- 在许多物种中观察到交配后的伴侣守护,通过减少精子竞争来潜在地确保父权.
- 虽然在各种种类中很常见,但伴侣守护对男性生殖成功的遗传影响在很大程度上仍未确定.
- 在哺乳动物 (包括动物) 中记录了伴侣守护,但其进化稳定性因物种而异.
研究的目的:
- 为了研究伴侣守护对爱达荷州地面松鼠 (Spermophilus brunneus) 的男性父权的影响.
- 为了确定伴侣保护是否代表雄性爱达荷州地面松鼠的进化稳定策略 (ESS).
- 为了比较爱达荷州地面松鼠与贝尔丁的地面松鼠 (S. beldingi) 的伴侣守护的进化稳定性.
主要方法:
- 在交配后对爱达荷州地面松鼠的雄性进行观察研究.
- 父亲身份分析,以评估守护雄性的生殖成功.
- 游戏理论分析来评估保护伴侣作为一种进化稳定的策略.
主要成果:
- 由雄性爱达荷州地面松鼠守护的伴侣显著增加了它们的父权概率.
- 游戏理论分析表明,保护伴侣是雄性S. brunneus.的一个进化稳定的策略.
- 对雄性S. beldingi来说,守护伴侣并不是一种进化稳定的策略,它们在交配后恢复寻找伴侣.
结论:
- 交配后的伴侣守护是爱达荷州雄性松鼠的成功生殖策略,直接增加了父权.
- 保护伴侣的进化动态在密切相关的地松鼠物种之间有所不同.
- 了解特定物种的繁殖策略对于进化生物学研究至关重要.
相关概念视频
01:22Imprinting
Behavioral imprinting is observed in some newborn animals and occurs when they develop strong and specific attachments to another animal (usually a parent) following brief, early-life exposures. Offspring imprint onto parents within a brief period after birth or hatching; this time window is called the critical period. Once imprinting occurs, the bond established between the parents and their offspring is usually long-lasting.
01:06Fixed Action Patterns
A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
00:55Parental Care
Many animals exhibit parental care behavior, including feeding, grooming, and protecting young offspring. Parental care is universal in mammals and birds, which often have young that are born relatively helpless. Several species of insects and fish, as well as some amphibians, also care for their young.