16Insect Evolutionary
... In sympatric speciation, divergent selection on its own must lead to reproductive isolation. It has long been realized that recombination rapidly breaks down associations between genes under selection and genes for mate choice, making sympatric speciation difficult (Felsenstein, 1981). Unsurprisingl ...
... In sympatric speciation, divergent selection on its own must lead to reproductive isolation. It has long been realized that recombination rapidly breaks down associations between genes under selection and genes for mate choice, making sympatric speciation difficult (Felsenstein, 1981). Unsurprisingl ...
The mating system of the brown bear Ursus arctos
... & Oring 1977). Mating systems and strategies are driven by the strength of sexual selection, which in turn is determined by male-male competition and female mate choice (Shuster & Wade 2003, Shuster 2009). Over 90% of mammalian species are polygynous, and the energetic investments in gametes and rea ...
... & Oring 1977). Mating systems and strategies are driven by the strength of sexual selection, which in turn is determined by male-male competition and female mate choice (Shuster & Wade 2003, Shuster 2009). Over 90% of mammalian species are polygynous, and the energetic investments in gametes and rea ...
PopGen4: Assortative mating
... Positive assortative mating and the process of speciation We do not cover the topic of speciation in this course. However, it is worth noting the potentially important role that positive assortative mating could have in the process of speciation. There are many hypotheses about the causes of specia ...
... Positive assortative mating and the process of speciation We do not cover the topic of speciation in this course. However, it is worth noting the potentially important role that positive assortative mating could have in the process of speciation. There are many hypotheses about the causes of specia ...
Can sexual selection theory inform genetic management of captive
... was emphasized that the zoo community carefully considers mate choice implications for captive breeding (Asa et al. 2011). The zoo community is becoming increasingly interested in this discussion, especially when faced with reproductive failure of breeding pairs due to mate incompatibility or aggres ...
... was emphasized that the zoo community carefully considers mate choice implications for captive breeding (Asa et al. 2011). The zoo community is becoming increasingly interested in this discussion, especially when faced with reproductive failure of breeding pairs due to mate incompatibility or aggres ...
The term sexual selection was suggested by Darwin to explain the
... suggestion supports Darwin’s intuition that there are two different selection mechanisms that operate in nature. But the differentiation between them is not the same as that proposed by Darwin. 16.2 FISHER'S MODEL 16.2.1 Introduction Before discussing the handicap principle and its broad implication ...
... suggestion supports Darwin’s intuition that there are two different selection mechanisms that operate in nature. But the differentiation between them is not the same as that proposed by Darwin. 16.2 FISHER'S MODEL 16.2.1 Introduction Before discussing the handicap principle and its broad implication ...
Adaptive Behavior - Psychology Today
... we developed a simple evolutionary computer simulation based on the ‘fitness matching’ model by Miller (2000, pp. 196–203). Miller (2000) proposed that the expression of preferences for high-quality mates in a monogamous mating system can give rise to positive assortment, or a correlation between th ...
... we developed a simple evolutionary computer simulation based on the ‘fitness matching’ model by Miller (2000, pp. 196–203). Miller (2000) proposed that the expression of preferences for high-quality mates in a monogamous mating system can give rise to positive assortment, or a correlation between th ...
Colour pattern evolution in butterflies: a phylogenetic
... should be subject to rapid and changing rates of evolution (Iwasa and Pomiankowski, 1995). A putatively sexually selected trait, such as UV reflectance, would be expected to appear and disappear relatively frequently through evolutionary time, thus leading to a contemporary distribution that appears ...
... should be subject to rapid and changing rates of evolution (Iwasa and Pomiankowski, 1995). A putatively sexually selected trait, such as UV reflectance, would be expected to appear and disappear relatively frequently through evolutionary time, thus leading to a contemporary distribution that appears ...
The evolution of animal genitalia: distinguishing between
... genitalic evolution. However, since this program focuses on current evolutionary processes rather than the results of past evolutionary events, it should be viewed as a necessary complement, rather as an alternative, to other approaches. In other words, the program is primarily concerned with the ma ...
... genitalic evolution. However, since this program focuses on current evolutionary processes rather than the results of past evolutionary events, it should be viewed as a necessary complement, rather as an alternative, to other approaches. In other words, the program is primarily concerned with the ma ...
Microsoft Word 97
... Courtship behaviors often arise as a result of certain hormone levels. Largely inherited or innate, these behaviors can be used to find possible mates at a reproductive stage where breedings can occur. Songs of male birds are not only intended to warn other rivals, but are used to attract females. ...
... Courtship behaviors often arise as a result of certain hormone levels. Largely inherited or innate, these behaviors can be used to find possible mates at a reproductive stage where breedings can occur. Songs of male birds are not only intended to warn other rivals, but are used to attract females. ...
Suffix Meaning Example - Colchester Public Schools
... servant, immigrant, assistant, merchant, regent, superintendent, resident ...
... servant, immigrant, assistant, merchant, regent, superintendent, resident ...
Sexual Size Dimorphism, Diet, and Reproduction in the Mexican
... Abstract.—In this study we examined diet, reproduction, and sexual dimorphism in body size of adult Thamnophis eques. We measured 307 adult snakes within the hydrologic system of High Lerma. Prey was obtained by forced regurgitation when snakes were collected, and gravid females were housed in the l ...
... Abstract.—In this study we examined diet, reproduction, and sexual dimorphism in body size of adult Thamnophis eques. We measured 307 adult snakes within the hydrologic system of High Lerma. Prey was obtained by forced regurgitation when snakes were collected, and gravid females were housed in the l ...
Johnson, K. P. 1999. The evolution of bill coloration and plumage
... 1980; Møller, 1994). Typically, colored bills are duller in females than in males ( Johnson KP, personal observation). In contrast, in species with markedly bright plumage, only the males possess this coloration in the plumage. Females of dimorphic species are typically mottled brown, presumably an ...
... 1980; Møller, 1994). Typically, colored bills are duller in females than in males ( Johnson KP, personal observation). In contrast, in species with markedly bright plumage, only the males possess this coloration in the plumage. Females of dimorphic species are typically mottled brown, presumably an ...
File
... 5.2.U5 Individuals that are better adapted tend to survive and produce more offspring while the less well adapted tend to die or produce fewer offspring. ...
... 5.2.U5 Individuals that are better adapted tend to survive and produce more offspring while the less well adapted tend to die or produce fewer offspring. ...
Role of reproductive hormones
... tube, by peristaltic contractions, until after 1 week it reaches the uterus and implantation occurs (day 7). The zygote first becomes a morulla (solid ball of 32 cells). Eventually it forms into a hollow ball, the blastocyst, with a fluid-filled cavity and an inner cell mass that will become the emb ...
... tube, by peristaltic contractions, until after 1 week it reaches the uterus and implantation occurs (day 7). The zygote first becomes a morulla (solid ball of 32 cells). Eventually it forms into a hollow ball, the blastocyst, with a fluid-filled cavity and an inner cell mass that will become the emb ...
Postcopulatory sexual selection
... sperm allocation is the allocation of ejaculates that contain more sperm in the presence of sperm competition, as occurs in crabs28 and birds29–30 (T. Pizzari et al., unpublished data). More is not always better, however, and theory predicts that, once the intensity of sperm competition becomes very ...
... sperm allocation is the allocation of ejaculates that contain more sperm in the presence of sperm competition, as occurs in crabs28 and birds29–30 (T. Pizzari et al., unpublished data). More is not always better, however, and theory predicts that, once the intensity of sperm competition becomes very ...
September 2005 Newsletter - Transvaal Herpetological Association
... Salmon Type and Super Salmon Type described above. Thus, it is viable to conclude that the offspring produced by “BCI03CFU” on April 8, 2005 were likely the exclusive product of sperm retained from a breeding in February 2003 with “WT Male”, and ovulation was induced by the “SS Male” in November of ...
... Salmon Type and Super Salmon Type described above. Thus, it is viable to conclude that the offspring produced by “BCI03CFU” on April 8, 2005 were likely the exclusive product of sperm retained from a breeding in February 2003 with “WT Male”, and ovulation was induced by the “SS Male” in November of ...
Lack of Assortative Mating Between Incipient Species of Stickleback
... possibility of reinforcement (Dobzhansky, 1951) driving divergence in mate choice, but it makes the assumption that mating behaviour is independent of the environment individual’s experience. Furthermore, the strength of assortative mating displayed by individuals from allopatric populations may not ...
... possibility of reinforcement (Dobzhansky, 1951) driving divergence in mate choice, but it makes the assumption that mating behaviour is independent of the environment individual’s experience. Furthermore, the strength of assortative mating displayed by individuals from allopatric populations may not ...
6 - BHU
... the process of evolution since it favours and encourages efficient genes and gene combinations. The phenomenon of natural selection has been demonstrated in artificial population containing chromosomal or genetic variants. Selection operates in only one direction, towards the elimination of deleteri ...
... the process of evolution since it favours and encourages efficient genes and gene combinations. The phenomenon of natural selection has been demonstrated in artificial population containing chromosomal or genetic variants. Selection operates in only one direction, towards the elimination of deleteri ...
Sexual size dimorphism lacking in small mammals
... Soricomorpha) from published literatures. The sexual difference in size between the sexes is not-significant either in 33 little female-biased SSD or in 62 little male-biased SSD species. The non-significant difference in body size of 62 little male-biased SSD species showed that sexual selection di ...
... Soricomorpha) from published literatures. The sexual difference in size between the sexes is not-significant either in 33 little female-biased SSD or in 62 little male-biased SSD species. The non-significant difference in body size of 62 little male-biased SSD species showed that sexual selection di ...
Growth, Survival, and Reproduction in a Northern Illinois Population
... observed for some snakes. This implies an error of up to 7% in measures of SVL and so both positive and negative growth increments of less than 7% were omitted for within-season captures. Other authors have omitted negative growth increments from analyses of growth rate (e.g., Brown and Weatherhead, ...
... observed for some snakes. This implies an error of up to 7% in measures of SVL and so both positive and negative growth increments of less than 7% were omitted for within-season captures. Other authors have omitted negative growth increments from analyses of growth rate (e.g., Brown and Weatherhead, ...
Costs of reproduction and the evolution of sexual dimorphism in a
... Life-history models suggest that `costs of reproduction' can in¯uence the evolution of sexual dimorphism, but empirical data on this effect are scarce. We tested the idea using `¯ying lizards' (Asian agamids of the genus Draco), because the evolution of `¯ight' (gliding) is likely to have increased ...
... Life-history models suggest that `costs of reproduction' can in¯uence the evolution of sexual dimorphism, but empirical data on this effect are scarce. We tested the idea using `¯ying lizards' (Asian agamids of the genus Draco), because the evolution of `¯ight' (gliding) is likely to have increased ...
Host-shift effects on mating behavior and
... nutritional larval experience. These crosses were needed for all calculations of RI parameters and behavioral comparisons because they served as a standard for the observed/expected mating ratio. In the second group of crosses, labeled as “homo-selection/hetero-treatment,” mating partners originated ...
... nutritional larval experience. These crosses were needed for all calculations of RI parameters and behavioral comparisons because they served as a standard for the observed/expected mating ratio. In the second group of crosses, labeled as “homo-selection/hetero-treatment,” mating partners originated ...
Chapter 51 Presentation
... imprint on their parents and learn the basic behaviors of their species. This is also the period of time where the parents learn the appearance of their offspring. travismulthaupt.com ...
... imprint on their parents and learn the basic behaviors of their species. This is also the period of time where the parents learn the appearance of their offspring. travismulthaupt.com ...
Omtentafråga - Studentportalen
... selective regimes during periods in allopatry or because they have been exposed to strong competition in sympatry and therefore diverged in one or several ecologically important trait (e.g. the example of beak size in the finches I showed on the black board). Hybrids typically have an intermediate p ...
... selective regimes during periods in allopatry or because they have been exposed to strong competition in sympatry and therefore diverged in one or several ecologically important trait (e.g. the example of beak size in the finches I showed on the black board). Hybrids typically have an intermediate p ...
File
... could be explained by individual differences in reproductive success (number of offspring). Darwin's term for this was "natural selection," parallel to the already accepted term of "artificial selection" used to describe breeding programs for domesticated plants and animals. For populations to evolv ...
... could be explained by individual differences in reproductive success (number of offspring). Darwin's term for this was "natural selection," parallel to the already accepted term of "artificial selection" used to describe breeding programs for domesticated plants and animals. For populations to evolv ...