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... Produce large numbers of offspring or breed more frequently Parents put little or no care into their offspring High fecundity = High number of eggs produced annually Eggs produced in larger numbers but have higher mortality rates few survive to adulthood ...
... Produce large numbers of offspring or breed more frequently Parents put little or no care into their offspring High fecundity = High number of eggs produced annually Eggs produced in larger numbers but have higher mortality rates few survive to adulthood ...
Lecture_31_Mar 26_ sex
... parthenogenetic female passes twice as many of her genes to progeny as a sexually reproducing female. Why are not all organism parthenogenetic? How can we explain sex persisting in populations? Are these explanations powerful enough relative to individual ...
... parthenogenetic female passes twice as many of her genes to progeny as a sexually reproducing female. Why are not all organism parthenogenetic? How can we explain sex persisting in populations? Are these explanations powerful enough relative to individual ...
A characteristic feature of parasites is their high reproductive output
... parthenogenetic female passes twice as many of her genes to progeny as a sexually reproducing female. Why are not all organism parthenogenetic? How can we explain sex persisting in populations? Are these explanations powerful enough relative to individual ...
... parthenogenetic female passes twice as many of her genes to progeny as a sexually reproducing female. Why are not all organism parthenogenetic? How can we explain sex persisting in populations? Are these explanations powerful enough relative to individual ...
Animal relationships
... Check out this for some information on different interactions (from page 54 onwards). Also remember some of the stuff from 2A... ...
... Check out this for some information on different interactions (from page 54 onwards). Also remember some of the stuff from 2A... ...
18th_Lecture
... evidence for a conviction, and, having separated both prisoners, each of them is offered the same deal: if one testifies for the prosecution against the other and the other remains silent, the betrayer goes free and the silent accomplice receives the full 10-year sentence. If both stay silent, the p ...
... evidence for a conviction, and, having separated both prisoners, each of them is offered the same deal: if one testifies for the prosecution against the other and the other remains silent, the betrayer goes free and the silent accomplice receives the full 10-year sentence. If both stay silent, the p ...
Sexual conflict and the evolutionary ecology of mating patterns
... frequencyzl. Similarly, in Get-r-isodontoguster, females were less reluctant to mate in conditions with either a more male-biased sex ratio or a higher overall densityz3. An observational study suggests that a more complicated relationship between harassment rate and female reluctance may occur in A ...
... frequencyzl. Similarly, in Get-r-isodontoguster, females were less reluctant to mate in conditions with either a more male-biased sex ratio or a higher overall densityz3. An observational study suggests that a more complicated relationship between harassment rate and female reluctance may occur in A ...
Dryas iulia (Flambeau Butterfly)
... competitor. Femalesy behave slightly different to the males, they are not found mud-puddling. Instead they are typically close to the nectar source they have to feed on for nutrients, essential for egg production. They are also close to the Passiflora plant species so that they will be able to maxim ...
... competitor. Femalesy behave slightly different to the males, they are not found mud-puddling. Instead they are typically close to the nectar source they have to feed on for nutrients, essential for egg production. They are also close to the Passiflora plant species so that they will be able to maxim ...
Intersexual conflict in spiders
... eggs can be costly and the greater the cost to the female, the more vigorous will be the rejection of additional males. Females may reduce receptivity after one mating (Elgar 1998 and references therein), they may respond aggressively towards male approaches or evolve structures that enhance their ...
... eggs can be costly and the greater the cost to the female, the more vigorous will be the rejection of additional males. Females may reduce receptivity after one mating (Elgar 1998 and references therein), they may respond aggressively towards male approaches or evolve structures that enhance their ...
The mating systems of pinnipeds and marine iguanas: convergent
... prevents males from monopolizing females by means of feeding territoriality in the intertidal or in shallow water close to the coast since they cool down rapidly when in the water (Bartholomew, 1966) and a cold marine iguana is too sluggish to fight and perhaps even to copulate. I n pinnipeds and ma ...
... prevents males from monopolizing females by means of feeding territoriality in the intertidal or in shallow water close to the coast since they cool down rapidly when in the water (Bartholomew, 1966) and a cold marine iguana is too sluggish to fight and perhaps even to copulate. I n pinnipeds and ma ...
Natural selection lecture
... http://images.google.com/imgres?imgurl=http://biology.kenyon.edu/courses/biol114/Chap05/trna-1.gif&imgrefurl=http://biology.kenyon.edu/courses/biol114/Chap05/Chapter05.html&h=382&w=283&sz=37&tbnid=G8z7JoxTdy0J:&tbnh=119&tbnw=88&hl=en&start=5&prev=/images%3Fq%3DtRNA%26svnum%3D50%26hl%3Den%26lr%3D%26 ...
... http://images.google.com/imgres?imgurl=http://biology.kenyon.edu/courses/biol114/Chap05/trna-1.gif&imgrefurl=http://biology.kenyon.edu/courses/biol114/Chap05/Chapter05.html&h=382&w=283&sz=37&tbnid=G8z7JoxTdy0J:&tbnh=119&tbnw=88&hl=en&start=5&prev=/images%3Fq%3DtRNA%26svnum%3D50%26hl%3Den%26lr%3D%26 ...
Behavior of four species of fiddler crabs, genus Uca, in southeast
... male was standing on a pile of mud balls so he was more visible, and sometimes he waved a few times (over 5–10 s) during this period. Other sexual interactions included males pushing females by backing against them, in some cases into burrows. Females generally avoided males. We saw one mating, but ...
... male was standing on a pile of mud balls so he was more visible, and sometimes he waved a few times (over 5–10 s) during this period. Other sexual interactions included males pushing females by backing against them, in some cases into burrows. Females generally avoided males. We saw one mating, but ...
PPT - Wildlife Ecology and Conservation
... – males can breed as young as 6 months – females produce 1 lamb (twins uncommon) • fertility decreases with age • gustation around 175 days ( 6 months) ...
... – males can breed as young as 6 months – females produce 1 lamb (twins uncommon) • fertility decreases with age • gustation around 175 days ( 6 months) ...
Population Density • Population – the members of a species living
... their many offspring K-strategists are species that: o Are more protected against their environments (type I) o Reproduce in smaller numbers Since there is such a low mortality rate o Are able to offer parental care to their few offspring ...
... their many offspring K-strategists are species that: o Are more protected against their environments (type I) o Reproduce in smaller numbers Since there is such a low mortality rate o Are able to offer parental care to their few offspring ...
26-NaturalSelection
... Adaptive traits confer evolutionary advantages in different ways Some behaviors reduce predation ...
... Adaptive traits confer evolutionary advantages in different ways Some behaviors reduce predation ...
WEST INDIAN IGUANAS OF THE GENUS Cyclura
... leaves, flowers and fruits of as many as 58 different native plants on a single island. They also consume a very small amount of animal matter in the form of very easily attainable items such as insects, land crabs and carrion, which can include dead seabirds, fish and, rarely, other iguanas. Iguana ...
... leaves, flowers and fruits of as many as 58 different native plants on a single island. They also consume a very small amount of animal matter in the form of very easily attainable items such as insects, land crabs and carrion, which can include dead seabirds, fish and, rarely, other iguanas. Iguana ...
Quick Links
... A sex difference in vulnerability to parasites, and therefore mortality, is thought to be a viability cost associated with sexual selection (Moore & Wilson, 2002). Thus, the population sex ratio is expected to vary temporally within species that possess sexually selected traits (Andersson, 1994). Th ...
... A sex difference in vulnerability to parasites, and therefore mortality, is thought to be a viability cost associated with sexual selection (Moore & Wilson, 2002). Thus, the population sex ratio is expected to vary temporally within species that possess sexually selected traits (Andersson, 1994). Th ...
Big times for dwarfs: Social organization, sexual selection, and
... male sharing a territory with two females would likely suffer decreased foraging efficiency, leaving him with an unbalanced energy budget. The second problem that males encounter when defending two female territories against rivals is related to mating success and its reproductive consequences. The s ...
... male sharing a territory with two females would likely suffer decreased foraging efficiency, leaving him with an unbalanced energy budget. The second problem that males encounter when defending two female territories against rivals is related to mating success and its reproductive consequences. The s ...
Numbat - Department of Parks and Wildlife
... Consists almost exclusively of termites. Numbats make characteristic small shallow excavations in the soil to reach underground termite galleries and then extract termites with the aid of their sticky tongue. No preference for any particular species of termite is shown. ...
... Consists almost exclusively of termites. Numbats make characteristic small shallow excavations in the soil to reach underground termite galleries and then extract termites with the aid of their sticky tongue. No preference for any particular species of termite is shown. ...
Eastern Spiny Softshell Turtle
... • Main food items include snails, aquatic insects and vegetation at the edge of a wetland. Breeding • Females reach maturity in 12-20 years; • Breeding occurs throughout the season and females are capable of storing sperm until it is needed for fertilizing the eggs; • Nests are dug in May or June, u ...
... • Main food items include snails, aquatic insects and vegetation at the edge of a wetland. Breeding • Females reach maturity in 12-20 years; • Breeding occurs throughout the season and females are capable of storing sperm until it is needed for fertilizing the eggs; • Nests are dug in May or June, u ...
Haplodiploidy seems to facilitate queen re
... Virtually every place on earth capable of sustaining living organisms is occupied by species exploiting those niches. Furthermore, places are constantly contested by new colonizers, trying to establish themselves. In social insects, one can visualize two different, opposing strategies for starting a ...
... Virtually every place on earth capable of sustaining living organisms is occupied by species exploiting those niches. Furthermore, places are constantly contested by new colonizers, trying to establish themselves. In social insects, one can visualize two different, opposing strategies for starting a ...
Reproductive Biology of Elasmobranchs
... developing oocytes and embryos at the same time – Reproductive cycles >3.5 yrs have been postulated ...
... developing oocytes and embryos at the same time – Reproductive cycles >3.5 yrs have been postulated ...
Practicals (19.5h) Exercises (13h)
... Pied flycatcher birds. Only one parent heard a taped begging call at the nest. The other heard no call. The parent who heard the call, whether male or female, responded by bringing back more food. Thus, on the left the female brings back more food when she hears begging (upper inverted triangle) tha ...
... Pied flycatcher birds. Only one parent heard a taped begging call at the nest. The other heard no call. The parent who heard the call, whether male or female, responded by bringing back more food. Thus, on the left the female brings back more food when she hears begging (upper inverted triangle) tha ...
Natural selection lecture 12-12
... 1. If all offspring were able to reproduce successfully populations size would exponentially increase over a few generations 2. In natures populations sizes are relatively stable ...
... 1. If all offspring were able to reproduce successfully populations size would exponentially increase over a few generations 2. In natures populations sizes are relatively stable ...
Document
... too low 2. Some snow geese die on the nest when weight drops too low 3. Clutch sizes are smaller for waterfowl in poor ...
... too low 2. Some snow geese die on the nest when weight drops too low 3. Clutch sizes are smaller for waterfowl in poor ...
Behavioral ecology
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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.