Exam2key - life.illinois.edu
... A. Sneaker males usually acquire higher reproductive success than territorial males B. Sneaker males save energy because they do not need to maintain and defend territories C. Sneaker males mate more than territorial males, and therefore fertilize more of the female’s offspring due to “last male pre ...
... A. Sneaker males usually acquire higher reproductive success than territorial males B. Sneaker males save energy because they do not need to maintain and defend territories C. Sneaker males mate more than territorial males, and therefore fertilize more of the female’s offspring due to “last male pre ...
Document
... • In lekking species, males only pass sperm. Therefore, only indirect benefits are possible. • If males differ in genetic quality, then females should always prefer the male of highest quality. • Over time, such intense selection will deplete and possibly eliminate genetic variation. • What then do ...
... • In lekking species, males only pass sperm. Therefore, only indirect benefits are possible. • If males differ in genetic quality, then females should always prefer the male of highest quality. • Over time, such intense selection will deplete and possibly eliminate genetic variation. • What then do ...
Evolutionary Genetics
... Theories for the existence of female preferences & exaggerated male secondary sexual traits: 1. Female choice and male traits co-evolve (Fisher's Runaway Process) 2. Choosy females gain benefits from their mates. These can be Direct benefits Genetic benefits 3. Female are choosy because of a s ...
... Theories for the existence of female preferences & exaggerated male secondary sexual traits: 1. Female choice and male traits co-evolve (Fisher's Runaway Process) 2. Choosy females gain benefits from their mates. These can be Direct benefits Genetic benefits 3. Female are choosy because of a s ...
Chapter 51 - Plattsburgh State Faculty and Research Web Sites
... Male display and male quality Considerable evidence that male’s ability to grow attractive plumage and engage in vigorous displays are indicators of males genetic resistance to disease and parasites. By choosing such males, females ensure their young will receive high quality genes. ...
... Male display and male quality Considerable evidence that male’s ability to grow attractive plumage and engage in vigorous displays are indicators of males genetic resistance to disease and parasites. By choosing such males, females ensure their young will receive high quality genes. ...
File - Social Sciences @ Groby
... • Sexual dimorphism is maintained by the counteracting pressures of natural selection and sexual selection. • Presumably, increased sexual dimorphism means males are brighter and more conspicuous, leading to increased predation. • So long as the reproductive benefits of the trait due to sexual selec ...
... • Sexual dimorphism is maintained by the counteracting pressures of natural selection and sexual selection. • Presumably, increased sexual dimorphism means males are brighter and more conspicuous, leading to increased predation. • So long as the reproductive benefits of the trait due to sexual selec ...
GK-12 Pre-Workshop Assignment
... their habitat (classroom, gymnasium, courtyard, etc.) to wait for the males to come in. When the males go into the habitat, they will approach the females and attempt to “mate”. The females will either accept or reject the mating offer. If the female accepts the male, she will give him her “love car ...
... their habitat (classroom, gymnasium, courtyard, etc.) to wait for the males to come in. When the males go into the habitat, they will approach the females and attempt to “mate”. The females will either accept or reject the mating offer. If the female accepts the male, she will give him her “love car ...
Sexual Selection
... PHASE 2: Once female preferences exist, males with the trait are even more fit (both a natural and a sexual selection advantage). There will then be an ever increasing selective force favoring stronger preferences and more extreme traits (Fisher's runaway process). ...the further development of the ...
... PHASE 2: Once female preferences exist, males with the trait are even more fit (both a natural and a sexual selection advantage). There will then be an ever increasing selective force favoring stronger preferences and more extreme traits (Fisher's runaway process). ...the further development of the ...
Bio%20281%202011%20lecture%2016%20
... Polygyny threshold Polygyny threshold = point at which it’s better to be polygynous on a good territory ...
... Polygyny threshold Polygyny threshold = point at which it’s better to be polygynous on a good territory ...
SEXUAL SELECTION In this class we have discussed how natural
... between preference and trait. Since T2 males have higher mating success, on average, trait increases in frequency in population. Preference increases in population b/c of genetic correlation. Other genes affecting trait and preference behave similarly. This process can lead to elaboration of trait a ...
... between preference and trait. Since T2 males have higher mating success, on average, trait increases in frequency in population. Preference increases in population b/c of genetic correlation. Other genes affecting trait and preference behave similarly. This process can lead to elaboration of trait a ...
Introduction to Behaviors
... Fitness – reproductive success, or the number of your genes that get passed on to future generations is the criteria used to measure biological success. ...
... Fitness – reproductive success, or the number of your genes that get passed on to future generations is the criteria used to measure biological success. ...
24_ParentalCare
... -cost / benefit ratio for parenting different between sexes Cost of parental care is greater for males. ...
... -cost / benefit ratio for parenting different between sexes Cost of parental care is greater for males. ...
Review of Survival, Reproduction, and Behavior by J.R. Krebs and
... Females may be discriminating,but this says nothing about whether they are passionate. Mating systems are discussed twice, first in circumstanceswithout parentalcare and then with it; in addition to being confusing,this division leads to polygynybeingdiscussedtwiceandmonogamyandpolyandry once. Polya ...
... Females may be discriminating,but this says nothing about whether they are passionate. Mating systems are discussed twice, first in circumstanceswithout parentalcare and then with it; in addition to being confusing,this division leads to polygynybeingdiscussedtwiceandmonogamyandpolyandry once. Polya ...
Pros and Cons of Group Living
... • Young are better protected (increased passing of genes) • Reduced chance of predation • Increased survival • Increased rate of reproduction ...
... • Young are better protected (increased passing of genes) • Reduced chance of predation • Increased survival • Increased rate of reproduction ...
Chapter 13
... impressed by the fact that qualities of sexual attractiveness were often the reverse of qualities leading to individual survival. He thought that gaining a higher chance to win mates was worth the risk conferred by such characters. Bright colors, long tails, plumes, antlers and horns threaten the su ...
... impressed by the fact that qualities of sexual attractiveness were often the reverse of qualities leading to individual survival. He thought that gaining a higher chance to win mates was worth the risk conferred by such characters. Bright colors, long tails, plumes, antlers and horns threaten the su ...
5 Reproduction, Dispersal, and Migration
... What are the advantages? • can mate with anyone you run in to. What are the costs? ...
... What are the advantages? • can mate with anyone you run in to. What are the costs? ...
Selection in Relation to Sex—to this topic).
... that seem clearly to reduce some aspects of fitness. For example, in social insects, many individuals are sterile workers, and they feed and rear the offspring of other individuals. Another example occurs in many animals in which individuals of one sex have conspicuous traits or behaviors that make ...
... that seem clearly to reduce some aspects of fitness. For example, in social insects, many individuals are sterile workers, and they feed and rear the offspring of other individuals. Another example occurs in many animals in which individuals of one sex have conspicuous traits or behaviors that make ...
INTRODUCTION
... compete among themselves for mates. • Intersexual Selection: Individuals of one sex consistently choose mates among members of opposite sex based on a particular trait. ...
... compete among themselves for mates. • Intersexual Selection: Individuals of one sex consistently choose mates among members of opposite sex based on a particular trait. ...
Ecology Mini-Exam #1 Name
... 10. Compare and contrast the life histories of Panamint kangaroo rats and Pinyon mice. They are the same in that both species try to maximize inclusive fitness. They differ in that Pinyon mice have short lives, produce large litters, exhibit little parental care, and reproduce at every opportunity. ...
... 10. Compare and contrast the life histories of Panamint kangaroo rats and Pinyon mice. They are the same in that both species try to maximize inclusive fitness. They differ in that Pinyon mice have short lives, produce large litters, exhibit little parental care, and reproduce at every opportunity. ...
chapter39_Animal Behavior(5
... • Sexual selection occurs when males or females of a species compete for access to mates, or when they are choosy about their mates • Parenting behaviors can also reflect different selective pressures operating on males and females ...
... • Sexual selection occurs when males or females of a species compete for access to mates, or when they are choosy about their mates • Parenting behaviors can also reflect different selective pressures operating on males and females ...
Introduction - Milan Area Schools
... Inbreeding—the mating of individuals who are genetically related—could help explain the evolution of eusociality among many hymenopteran species in which queens mate with many males, and among termites and naked mole-rats, in which both sexes are diploid. ...
... Inbreeding—the mating of individuals who are genetically related—could help explain the evolution of eusociality among many hymenopteran species in which queens mate with many males, and among termites and naked mole-rats, in which both sexes are diploid. ...
LifeHistories Multiple Choice Identify the letter of the choice that best
... 1. A marine hydra reproducing by budding would most likely would show a high level of fitness in and quickly colonize a habitat modified by introduction of acid waste leaching from surface mining activity. a. true b. false 2. During sexual reproduction genetic variation develops during gamete produc ...
... 1. A marine hydra reproducing by budding would most likely would show a high level of fitness in and quickly colonize a habitat modified by introduction of acid waste leaching from surface mining activity. a. true b. false 2. During sexual reproduction genetic variation develops during gamete produc ...
The Ecology of Finding a Place to Live
... Defendable given the number of competitors. Concentrated or rich resource Benefit is greater than cost of defending ...
... Defendable given the number of competitors. Concentrated or rich resource Benefit is greater than cost of defending ...
Ecology Lecture 11
... Polygyny: One male mates with several females Polyandry: One female mates with several males ...
... Polygyny: One male mates with several females Polyandry: One female mates with several males ...
Behavioral ecology
Behavioral ecology is the study of the evolutionary basis for animal behavior due to ecological pressures. Behavioral ecology emerged from ethology after Niko Tinbergen outlined four questions to address when studying animal behavior which are the proximate causes, ontogeny, survival value, and phylogeny of behavior.If an organism has a trait which provides them with a selective advantage (i.e. has an adaptive significance) in a new environment natural selection will likely favor it. This was originally proposed as the theory of natural selection by Charles Darwin. Adaptive significance therefore refers to the beneficial qualities, in terms of increased survival and reproduction, a trait conveys. Genetic differences in individuals lead to behavioral differences that in turn drive differences in adaptation, reproductive success, and ultimately evolution.Individuals are always in competition with others for limited resources, including food, territories, and mates. Conflict will occur between predators and prey, between rivals for mates, between siblings, mates, and even between parents and their offspring.