Lecture 23: Mating systems
... • EPCs within a socially monogamous mating system – Benefits & costs for males and females ...
... • EPCs within a socially monogamous mating system – Benefits & costs for males and females ...
lecture 21 – mating systems ii
... How these systems have evolved remains mysterious. The sandpipers are a good example. 15 species are monogamous, 3 are polyandrous, and 3 are polygynous. Linking these differences to species differences in ecology, length of breeding season, predictability of food, etc. have not been convincing..... ...
... How these systems have evolved remains mysterious. The sandpipers are a good example. 15 species are monogamous, 3 are polyandrous, and 3 are polygynous. Linking these differences to species differences in ecology, length of breeding season, predictability of food, etc. have not been convincing..... ...
Document
... 1. You are studying two populations of rats – one in New York and the other in Florida. Adult New York rats seem to prefer Swiss cheese and Florida rats seems to prefer cheddar. Design an experiment to determine the extent to which this behavior may be genetically controlled versus environmentally i ...
... 1. You are studying two populations of rats – one in New York and the other in Florida. Adult New York rats seem to prefer Swiss cheese and Florida rats seems to prefer cheddar. Design an experiment to determine the extent to which this behavior may be genetically controlled versus environmentally i ...
beh ecol apr 15 02 - Faculty Web Sites at the University of Virginia
... High variance in reproductive output correlates with high fitness variance, which drives intense sexual selection One corollary of this evolutionary fact is that dimorphic secondary sexual traits, the consequences of sexual selection, should be most exaggerated in polygynous species, and that tend ...
... High variance in reproductive output correlates with high fitness variance, which drives intense sexual selection One corollary of this evolutionary fact is that dimorphic secondary sexual traits, the consequences of sexual selection, should be most exaggerated in polygynous species, and that tend ...
Intersexual selection
... sex ratios Nest predation is high, only one parent stays at nest to decrease visibility Females selected for multiple mating (replacement clutches) which apparently decreased parental care Why don’t all species have male care? Most species have NEITHER male nor female care Lactating mammals ...
... sex ratios Nest predation is high, only one parent stays at nest to decrease visibility Females selected for multiple mating (replacement clutches) which apparently decreased parental care Why don’t all species have male care? Most species have NEITHER male nor female care Lactating mammals ...
23_MatingSystems
... Females may mate with another male so monogamy may serve to guard the female. If males help rear young, fitness increases through increased young survival. The evolution mating systems is driven by the distribution of resources in the environment for both the male and the female. ...
... Females may mate with another male so monogamy may serve to guard the female. If males help rear young, fitness increases through increased young survival. The evolution mating systems is driven by the distribution of resources in the environment for both the male and the female. ...
chapter 55 behavioral ecology
... traits that will increase an organism's mating success 2 forms Intersexual – member of one sex chooses mate based on particular characteristics Intrasexual – members of one sex compete over partners with the winner performing most of the matings ...
... traits that will increase an organism's mating success 2 forms Intersexual – member of one sex chooses mate based on particular characteristics Intrasexual – members of one sex compete over partners with the winner performing most of the matings ...
File - Mrs. LeCompte
... Foraging results in more energy for the animal (and makes them more likely to reproduce), but puts the animal at risk (and less likely to reproduce) Animals often have to make trade-offs when foraging Reproductive Strategies and Fitness Polygamous = when a single male mates with multiple females ...
... Foraging results in more energy for the animal (and makes them more likely to reproduce), but puts the animal at risk (and less likely to reproduce) Animals often have to make trade-offs when foraging Reproductive Strategies and Fitness Polygamous = when a single male mates with multiple females ...
PRIMATE MATING MAMMALS: reproduce sexually
... A) males try to drive other males away B) sperm quantity INTER SEX: Females are looking for: traits A) increase female fitness B) good genes: increase offspring fitness C) conspicuous traits - may be non adaptive, but get males noticed ...
... A) males try to drive other males away B) sperm quantity INTER SEX: Females are looking for: traits A) increase female fitness B) good genes: increase offspring fitness C) conspicuous traits - may be non adaptive, but get males noticed ...
File
... Polyandry: When 1 female mates with more than 1 male. Do this to ensure survival of their offspring. There are also lots of examples of this found in ...
... Polyandry: When 1 female mates with more than 1 male. Do this to ensure survival of their offspring. There are also lots of examples of this found in ...
chapter 6 - life.illinois.edu.
... A) Males have more weaned pups than females; B) Females have more weaned pups than males; C) Most females do not wean pups; D) Most males do not wean pups. ...
... A) Males have more weaned pups than females; B) Females have more weaned pups than males; C) Most females do not wean pups; D) Most males do not wean pups. ...
25_ParentalCare2
... Occurs when resources are variable or in short supply? Offspring compete for resources (they only share 50% of genes) ...
... Occurs when resources are variable or in short supply? Offspring compete for resources (they only share 50% of genes) ...
Mating Systems in Mammals
... 4. Several features of mammalian reproduction further promote differences in reproductive behavior between the sexes. a. Fertilization occurs in the oviducts, so it is certain that the female is the biological parent of offspring born to her, but paternity is not as certain. b. Only female mammals g ...
... 4. Several features of mammalian reproduction further promote differences in reproductive behavior between the sexes. a. Fertilization occurs in the oviducts, so it is certain that the female is the biological parent of offspring born to her, but paternity is not as certain. b. Only female mammals g ...
Chapters 10-14 Abbreviated
... Debate on whether the evolutionary analaysis of HUMAN behavior is warrented. ...
... Debate on whether the evolutionary analaysis of HUMAN behavior is warrented. ...
Exam3 KEY 2007 - life.illinois.edu
... d. A male’s territory quality will be related to his mating success 5. (40)Which of the following statements describes the lek paradox? a. Although males congregate in leks to attract mates, most of the females will choose to mate with just a few of the males, leaving many unsuccessful males. b. Fem ...
... d. A male’s territory quality will be related to his mating success 5. (40)Which of the following statements describes the lek paradox? a. Although males congregate in leks to attract mates, most of the females will choose to mate with just a few of the males, leaving many unsuccessful males. b. Fem ...
Evolution of Mating Systems
... Invest more in the first larva so at least some will fully mature: burying beetles Females with abundant foods more likely to produce males: humans, red deer. Why? ...
... Invest more in the first larva so at least some will fully mature: burying beetles Females with abundant foods more likely to produce males: humans, red deer. Why? ...
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.