The brightness of color in male Blue-footed boobies correlates with higher mating success. Why is the color of the feet considered an ‘honest signal’?
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The brightness of color in male Blue-footed boobies correlates with higher mating success. Why is the color of the feet considered an ‘honest signal’?
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- Which of the following statements is NOT the reason why females are choosy? By being choosy, she can acquire advantageous genotypes for her offspring from her mates. By being choosy, she can acquire resource for her offspring from her mates. By being choosy, she can ensure that her male offspring can attract more females as well. Her seeming choosiness is a by-product of her stereotypical behaviors exploited by the males for mating gains. All listed above are reasons why she is choosyMale California sea lion mating success is determined by the number of mates they can acquire. Larger males are more successful at maintain larger territories. Females remain in one territory for the duration of the mating season and larger territories support more females than smaller territories. Additionally, the most successful males will fast during mating season to remain present in their territory at all times. If they leave to hunt they risk loss of their territory and access to all the females present in it. Which of the following best describes sexual selection in this species? a. Males likely engage in male-male combat to maintain territories. b. Intersexual selection is likely stronger than intrasexual selection. c. Sexual selection on the females is stronger than on the males. d. Females will mate with smaller males at a higher frequency than larger malesIn 1983 a population of dark-eyed junco birds became established on the campus of the University of California, San Diego (UCSD), which is located many miles from the junco's normal habitat in the mixed-coniferous temperate forests in the mountains. Juncos have white outer tail feathers that the males display during aggressive interactions and during courtship displays. Males with more white in their tail are more likely to win aggressive interactions, and females prefer to mate with males with more white in their tails. Females have less white in their tails than do males, and display it less often. (Pamela J. Yeh. 2004. Rapid evolution of a sexually selected trait following population establishment in a novel habitat. Evolution 58[1]:166-74.) Refer to the paragraph on dark-eyed junco birds. The UCSD campus male junco population tails are about 36% white, whereas the tails of males from nearby mountain populations are about 40-45% white. The founding stock of UCSD birds was likely…
- High testosterone is often associated with shorter lifespan in mammals. However, you find a new species of mouse in which males live longer than females under field conditions. Which of the possible explanations below would NOT predict this pattern? Male-male competition often injures the participants. Females suffer costs of reproduction caused by the burden of milk production. Males, but not females, provide territorial guarding that improves the survival of their grandchildren. Females enter menopause and stop reproducing at age five, while males can reproduce until death.Regarding mating behavior, choose the false statement from the list: Some aspects of courtship behavior may have evolved from agonistic interactions. Courtship interactions ensure that the participating individuals are nonthreatening and of the proper species, sex, and physiological condition for mating. The mating relationship in most mammals is monogamous, to ensure the reproductive success of the pair. Polygamous relationships most often involve a single male and many females, but in some species this is reversed. Salmon swimming against the stream to lay eggs is an example of taxis. tropism. kinesis. cognitive mapping spatial learning Female Apanteles wasps lay their eggs in caterpillars of the genus Pieris. The site of the caterpillar initiates the egg laying behavior. This is an example of a fixed action pattern. problem solving behavior. habituation.…Polygyny is a common mating system in nature. Which one of the following scenarios is LEAST likely to result in a polygynous mating system? Male stalk-eyed flies form leks where receptive females come visit Male Neotropical giant damselfly defend water-filled tree holes, which are the oviposition sites for females. Suitable tree holes for oviposition are rare and females must mate with the resident male in exchange for access to the oviposition sites. Male Bengal tigers defend large territories that contain food sources. Female Bengal tigers visit male territories to mate. The density of the Bengal tiger is extremely low that male tigers rarely encounter more than one female in their lifetime. In the bumblebee-wolf Philanthus bicinctus, females are unreceptive until they finish constructing the long underground burrow as nest sites. Males search for locations containing a number of newly constructed burrows and attempt to control these sites against the intruders. Your cousin Peter…
- What fitness benefits might a crayfish that exhibits dominance behaviors gain?(either male or female)Female mimicry by males occurs in many species. For example, in the Broadley’s flat lizard (Platysaurus broadleyi), some males have the brown coloration of females while others are far more colorful (Whiting et al. 2009). Female mimics do secure some matings in the territories of their larger, more colorful rivals. Why are the bigger males (and those of the marine isopod Paracerceis sculpta) ever fooled into tolerating a female mimic? Why do female mimics occur in any species if the mating success of these individuals is lower than that of the bigger territorial males? Don't write from any online source..Describe and give an example of a dominance hierarchy. What role does it play in social behavior? Give a human parallel, and describe its role in human society. Are the two roles similar? Why or why not? Repeat this exercise for territorial behavior in humans and in another animal.
- In the initial encounter with the male intruder, resident male Cray fish showed extreme aggressive behaviors towards the intruder but after getting injected with octopamine, the resident male showed less aggression towards intruder males compared to their initial encounter. Based on what you know about serotonin an octopamine function, does the above situation of the injection octopamine makes sense? What might explain this and why do you say so? Also, what fitness benefits might a crayfish that shows dominance behaviors and a crayfish that shows subordinate behaviors gain?Intrasexual selection involves competition among one sex (typically males) for mating access to the other sex. Intersexual selection involves mate choice in which individuals from one sex (typically females) choose their mates from among individuals of the other sex. Imagine a group of males that is engaged in agonistic behavior, from which Male A emerges triumphant. Now imagine a female that is assessing all of the males that were involved in the fights, and chooses Male A. Explain why this situation shows how intrasexual and intersexual selection pressures are likely both at play in the trait selection.describe how signals function in aggression, courtship, and mating?