Now consider the illustration above that shows data on how often white fronted bee eater birds will feed the offspring of other birds as a function of the relatedness to those birds. 100 80 60 40 Merops bullockoides 20 0 Unrelated Cousin (-12%) Half sib (25%) Full sib (50%) (0%) Relationship to nestlings Do these data support the conclusion that altruistic behavior, specifically kin selection, is occurring here? Specifically do the data satisfy Hamilton's rule for altruistic behavior and what specifically in the data would represent the terms C and r in Hamilton's equation? Edit View Insert Format Tools Table Percentage of individuals that help

Now consider the illustration above that shows data on how often white fronted bee eater birds will feed the offspring of other birds as a function of the relatedness to those birds. 100 80 60 40 Merops bullockoides 20 0 Unrelated Cousin (-12%) Half sib (25%) Full sib (50%) (0%) Relationship to nestlings Do these data support the conclusion that altruistic behavior, specifically kin selection, is occurring here? Specifically do the data satisfy Hamilton's rule for altruistic behavior and what specifically in the data would represent the terms C and r in Hamilton's equation? Edit View Insert Format Tools Table Percentage of individuals that help

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter56: Animal Behavior

Section: Chapter Questions

Problem 1ITD

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Acorn woodpeckers (Melanerpes formicivorus) stash acornsin storage holes they drill in trees. When these woodpeckersbreed, the offspring from previous years often help withparental duties. Activities of these nonbreeding helpers includeincubating eggs and defending stashed acorns. Propose somequestions about the proximate and ultimate causation of thesebehaviors that a behavioral biologist could ask.
There are three chief ideas of the handicap principle: 1) Animals communicate with éach other throughn sigi must be honest, and 3) honest signals are expensive. Stotting behavior (up and down jumps gazelles exhibit when they spot a predator before the gazelle runs away) often results in the predator leaving before it attacks, presumably because the predator knows it won't easily catch that gazelle. This clearly is an example of the handicap principle based on the three ideas. True False
Much of animal behaviour theory is rooted in optimality, using this theory and thinking about territory size, construct a well-labeled graph below: sketch two lines (one for costs, one for benefits), with an asterisk (or symbol of your choosing) indicate the theoretical optimal territory size and in one sentence, explain why that particular territory size is optimal . Territory Size Costs/benefits
A breeding pair of birds receives help raising their young from an unrelated male bird. This behavior is termed cooperative breeding and in some ways this seems like an evolutionary paradox since helpers seem to be acting in ways that increase the fitness of others at their own cost. .How might providing this assistance improve the fitness of the unrelated male bird? Increasing the fitness of the unrelated offspring directly increases the unrelated bird's fitness O The cooperative relationship helps the unrelated male survive until he can find a mate and produce offspring of his own Rearing unrelated offspring delays sexual maturity in the helper bird so he has fewer offspring over the course of his life. Because he does not ever produce offspring of his own, the helper bird has a longer and healthier life.
Earlier explanations of altruistic behavior as a form of group selec-tion have been supplanted by Hamilton’s hypothesis of kin selection. What distinguishes kin selection and how does it accord with the no-tion of inclusive fitness, the relative number of an individual’s alleles that pass to the next generation?
DRAW IT You are considering two optimal foraging models forthe behavior of a mussel-feeding shorebird, the oystercatcher. Inmodel A, the energetic reward increases solely with mussel size.In model B, you take into consideration that larger mussels aremore difficult to open. Draw a graph of reward (energy benefiton a scale of 0–10) versus mussel length (scale of 0–70 mm) foreach model. Assume that mussels under 10 mm provide nobenefit and are ignored by the birds. Also assume that musselsstart becoming difficult to open when they reach 40 mm inlength and impossible to open when 70 mm long. Consideringthe graphs you have drawn, indicate what observations andmeasurements you would want to make in this shorebird’shabitat to help determine which model is more accurate.
How does reciprocal altruism contrast with kin selection as an expla-nation of apparently altruistic behavior? What evidence from vam-pire bats supports reciprocal altruism?
Female parasitoid wasps search for insect hosts in which to lay eggs, and they can often discriminate among individual hosts that are more or less suitable for their offspring. Behavioral ecologists have asked whether or not the wasps’ willingness to lay eggs in less suitable hosts varies with the female’s age. On the basis of life history theory, what pattern of change would you predict? Does life history theory make any other predictions about animal behavior?
In a species of birds, males court females by dancing and subordinate males are seen to join a dominant male and help in his dancing displays, though the subordinate receives no mating opportunities. If the subordinate male DOES NOT inherit the dominant male's territory upon its death, how would you explain this cooperative behavior? O Altruism, because the subordinate is receiving direct benefits O Mutualism, because the subordinate is receiving direct benefits O Altruism, because the subordinate is receiving indirect benefits O Mutualism, because the subordinate is receiving indirect benefits
Consider the following argument: Altruistic behavior in groups of related individuals is most likely driven by kin selection since related individuals would share DNA. Which of the following pieces of evidence would be most likely to weaken this argument? Data showing that only distantly related individuals are most likely to perform altruistic behaviors in order to protect each other Data showing that food gifts are given more common among family members than between unrelated individuals in a group Data showing that individuals that share a higher percentage of DNA in a group tend to show the most altruistic behavior between themselves Data showing that the more frequent an allele of a gene occurs in a population, the more likely that population performs altruistic behaviors
You document altruism in an animal species that you are studying: female zebras running at the back of the group, closest to the pursuing predator, as the group runs to escape a predator. Both kin selection and reciprocal altruism can explain this behavior. What piece of evidence would support the hypothesis that it's kin selection?
In 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…