鱼男性的替代生殖策略取决于出生日期
Shota Hosono1, Yoshio Masuda2, Shun Tokioka3
1Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba 277-0882, Japan.
Proceedings. Biological sciences
|April 24, 2024
概括
在日本长矛中,替代繁殖策略 (ARTs) 取决于化日期,而不是早期生长. 早的雄性成为配偶,而晚的雄性成为运动鞋.
科学领域:
- 海洋生物学 海洋生物学
- 动物行为 动物行为
- 进化生物学 进化生物学
背景情况:
- 在许多物种中观察到替代繁殖策略 (ART),雄性通常采用主导 (伴侣) 或附属 (运动员) 策略.
- "出生日期假说"表明,一个人的出生日期会影响其生殖策略,但这主要是在鱼类上进行测试的.
研究的目的:
- 为了测试日本长矛鱼 (Heterololigo bleekeri) 的出生日期假设.
- 调查化日期或早期生长是否决定了该物种的繁殖策略.
主要方法:
- 分析状态石的增长步骤,以确定个体鱼的化日期.
- 配偶和运动鞋男性之间的化日期和早期生长模式的比较.
- 在生殖季节对不成熟的雄性进行检查,以推断其生命历史路径.
主要成果:
- 在配偶 (早期化) 和运动鞋 (晚期化) 男性之间发现了出生日期的显著差异.
- 在两种策略之间,在化后长达100天的生长史中没有发现任何显著差异.
- 在繁殖季节捕获的不成熟雄性表现出与配偶相似的化日期,这表明它们处于配偶生命历史路径上.
结论:
- 出生日期假设在日本长矛鱼中得到了支持,表明化日期是ART的关键决定因素.
- 这项研究为水生无脊椎动物的出生日期假设提供了第一个证据.
- 出生日期影响表型的机制可能比以前理解的更广泛.
相关概念视频
01:06Fixed Action Patterns
16.0K
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.
16.0K
01:20Mate Choice
8.0K
Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
8.0K
01:29Life Histories
17.9K
Overview
17.9K
00:51Energy Budgets
9.2K
Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
9.2K
00:55Parental Care
11.7K
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.
11.7K
01:06Natural Selection and Mating Preferences
101
The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
Females, due to their biological roles in conception, pregnancy, and nursing,...
Females, due to their biological roles in conception, pregnancy, and nursing,...
101