Sexual selection in Japanese macaques I: female mate choice or male sexual coercion?

1997 ◽  
Vol 54 (3) ◽  
pp. 725-736 ◽  
Author(s):  
JOSEPH SOLTIS ◽  
FUSAKO MITSUNAGA ◽  
KEIKO SHIMIZU ◽  
YOSHIMI YANAGIHARA ◽  
MASUMI NOZAKI
1997 ◽  
Vol 54 (3) ◽  
pp. 737-746 ◽  
Author(s):  
JOSEPH SOLTIS ◽  
FUSAKO MITSUNAGA ◽  
KEIKO SHIMIZU ◽  
MASUMI NOZAKI ◽  
YOSHIMI YANAGIHARA ◽  
...  

2020 ◽  
pp. 305-331
Author(s):  
Rickey Cothran

Research using crustaceans has improved the understanding of sexual selection and sexual conflict. This is particularly true for understanding the biology of male weaponry and sexual conflict over mate guarding. Male crustaceans often are equipped with exaggerated claws that they use to monopolize access to females or resources that females use for reproduction. However, these weapons are often used in other contexts, e.g. mate choice and coercion of females, and understanding their evolution requires a broader perspective of how these traits are built and the fitness consequences of their use for both the bearer and interacting individuals. Although less well studied than male weaponry, crustaceans also provide excellent examples of elaborate sensory structures that are used in scramble competition among males for females. In addition to studies on male-male competition, crustaceans have been well represented in research on intrasexual selection (for the most part, female mate choice). Crustacean females use a variety of sensory channels to assess mates, and a challenge is to better understand what is being conveyed by signaling males and the fitness consequences of mate choice for females. In some cases the female’s sensory system appears to be exploited by males, and this could lead to sexual conflict over mating. Research on crustaceans has also informed the understanding of sexual conflict over mate guarding, including the evolution of traits used to resolve conflict and how the ecological context shapes the costs and benefits of guarding for both sexes.


2001 ◽  
Vol 12 (1) ◽  
pp. 59-64 ◽  
Author(s):  
Angelo Bisazza ◽  
Giorgio Vaccari ◽  
Andrea Pilastro

2010 ◽  
Vol 6 (3) ◽  
pp. 322-324 ◽  
Author(s):  
Bas Bruning ◽  
Benjamin L. Phillips ◽  
Richard Shine

In many anuran species, males vocalize to attract females but will grasp any female that comes within reach and retain their hold unless displaced by a rival male. Thus, female anurans may face strong selection to repel unwanted suitors, but no mechanism is known for doing so. We suggest that a defensive trait (the ability to inflate the body to ward off attack) has been co-opted for this role: by inflating their bodies, females are more difficult for males to grasp and hence, it is easier for another male to displace an already amplexed rival. Inflating a model female cane toad ( Bufo marinus ) strongly reduced a male's ability to maintain amplexus; and females who were experimentally prevented from inflating their bodies experienced no successful takeovers from rival males, in contrast to control females. Thus, the ability of a female cane toad to inflate her body may allow her to manipulate the outcome of male–male competition. This overlooked mechanism of anuran mate choice may reflect a common evolutionary pattern, whereby females co-opt defensive traits for use in sexual selection.


2016 ◽  
Vol 3 (5) ◽  
pp. 150720 ◽  
Author(s):  
Shin-ya Ohba ◽  
Noboru Okuda ◽  
Shin-ichi Kudo

Paternal care can be maintained under sexual selection, if it helps in attracting more mates. We tested the hypothesis in two giant water bug species, Appasus major and Appasus japonicus , that male parental care is sexually selected through female preference for caring males. Females were given an opportunity to choose between two males. In the first test of female mate choice, one male carried eggs on its back, while the other did not. The egg status was switched between these two males in the second test. The experiment revealed that females of both species preferred caring males (i.e. egg-bearing) to non-caring males. Nonetheless, the female mate preference for egg-bearing males was stronger in A. major than in A. japonicus . Our results suggest that sexual selection plays an important role in maintaining elaborate paternal care in giant water bugs, but the importance of egg-bearing by males in female mate choice varies among species.


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