Rapid evolution of adaptive niche construction
... evolutionary changes are small, then evolved niche construction might be a doubly small product of small changes in environmental modification and small changes in the fitness response to such modifications. We know that adaptive niche construction can evolve because it is found throughout the tree ...
... evolutionary changes are small, then evolved niche construction might be a doubly small product of small changes in environmental modification and small changes in the fitness response to such modifications. We know that adaptive niche construction can evolve because it is found throughout the tree ...
Lack of Assortative Mating Between Incipient Species of Stickleback
... intersexual competition for resources may all contribute towards positive assortative mating. Studies of contact zones between divergent populations can provide important insight into the strength of premating reproductive isolation and speciation (McMillan et al., 1997; Bailey et al., 2004; Cruz et ...
... intersexual competition for resources may all contribute towards positive assortative mating. Studies of contact zones between divergent populations can provide important insight into the strength of premating reproductive isolation and speciation (McMillan et al., 1997; Bailey et al., 2004; Cruz et ...
20150302120910
... geologic processes have not changed throughout Earth’s history Conclusion: Earth must be much older than 6,000 years ...
... geologic processes have not changed throughout Earth’s history Conclusion: Earth must be much older than 6,000 years ...
Mallet (2012) "The struggle..."
... both have been subject to extensive discussion over the last century or so. Related debates were about ‘r-’ versus ‘K-selection’, and its relevance for life-history strategies in what is broadly considered part of ‘ecology’, as well as frequency- and density-dependent selection, and speciation, topi ...
... both have been subject to extensive discussion over the last century or so. Related debates were about ‘r-’ versus ‘K-selection’, and its relevance for life-history strategies in what is broadly considered part of ‘ecology’, as well as frequency- and density-dependent selection, and speciation, topi ...
Why do individuals 4 and 5 have G rather than B
... 2. The composition of a population at a particular point in time (Sober, 1995, p. 384), e.g. the fact that 90% of the population are G-individuals and 10% are B-individuals (individuals with trait G or B, respectively); 3. The origin of traits in a population, in addition to their spread and mainte ...
... 2. The composition of a population at a particular point in time (Sober, 1995, p. 384), e.g. the fact that 90% of the population are G-individuals and 10% are B-individuals (individuals with trait G or B, respectively); 3. The origin of traits in a population, in addition to their spread and mainte ...
Asexual but not clonal: evolutionary processes in
... mechanism of automixis is gamete duplication. Here, the egg undergoes either a round of chromosome replication without nuclear division or a mitosis followed by fusion of the resulting two nuclei. In both cases, the result is a diploid zygote that is completely homozygous at all loci. Gamete duplica ...
... mechanism of automixis is gamete duplication. Here, the egg undergoes either a round of chromosome replication without nuclear division or a mitosis followed by fusion of the resulting two nuclei. In both cases, the result is a diploid zygote that is completely homozygous at all loci. Gamete duplica ...
Fig. 22-12 - Kirchner-WHS
... Lamarck (species can change) Malthus (population limits) Cuvier (fossils, extinction) Lyell (modern geology) Darwin (evolution, natural selection) Wallace (evolution, natural selection) ...
... Lamarck (species can change) Malthus (population limits) Cuvier (fossils, extinction) Lyell (modern geology) Darwin (evolution, natural selection) Wallace (evolution, natural selection) ...
The danger of applying the breeder`s equation in observational
... and the genetics of a trait jointly to predict evolution. Expanding the h2 term in eqn 1 and setting the righthand sides of eqns 1 and 2 to be equal, as their lefthand sides are identical, we obtain ...
... and the genetics of a trait jointly to predict evolution. Expanding the h2 term in eqn 1 and setting the righthand sides of eqns 1 and 2 to be equal, as their lefthand sides are identical, we obtain ...
Selection experiments: an under-utilized tool in
... 1993). They allow one to study evolution in action, but under more controlled and reproducible circumstances than are possible in the wild, and they allow one to project into the future. If extended for enough generations, they may allow one to observe fundamental changes in both phenotypic and gene ...
... 1993). They allow one to study evolution in action, but under more controlled and reproducible circumstances than are possible in the wild, and they allow one to project into the future. If extended for enough generations, they may allow one to observe fundamental changes in both phenotypic and gene ...
Parasitism and the evolutionary ecology of animal personality
... In common with other phenotypic characteristics, behavioural traits show considerable inter-individual and heritable variation (Stirling et al. 2002; Réale et al. 2007; Bell et al. 2009). Yet, despite their widespread existence, individual differences in behaviour have typically been treated as ‘no ...
... In common with other phenotypic characteristics, behavioural traits show considerable inter-individual and heritable variation (Stirling et al. 2002; Réale et al. 2007; Bell et al. 2009). Yet, despite their widespread existence, individual differences in behaviour have typically been treated as ‘no ...
Unifying Within- and Between-Generation Bet
... generation variation in the offspring number, equation (2) is the appropriate long-term fitness metric. As the wetspecialist genotype has both the highest mean and the lowest variance, natural selection favors this specialist at all population sizes. Next, imagine that the source of environmental het ...
... generation variation in the offspring number, equation (2) is the appropriate long-term fitness metric. As the wetspecialist genotype has both the highest mean and the lowest variance, natural selection favors this specialist at all population sizes. Next, imagine that the source of environmental het ...
Rajon, E. and Masel, J. (2013)
... edges represent single mutational steps (Wagner, 2005, see Fig. 1). The number of new phenotypes accessible by a single mutation has two components (Masel and Trotter, 2010; Wagner, 2011). First, a population that occupies many nodes on the network of possible genotypes – i.e. that has high genetic ...
... edges represent single mutational steps (Wagner, 2005, see Fig. 1). The number of new phenotypes accessible by a single mutation has two components (Masel and Trotter, 2010; Wagner, 2011). First, a population that occupies many nodes on the network of possible genotypes – i.e. that has high genetic ...
The Evolution of Darwinism: Selection, Adaptation, and Progress in
... he meant by this claim, how later biologists have treated the issues it addresses, and whether (or in what sense) this claim might be true, are the subjects of this book. Part I focuses on natural selection, the central theoretical principle of Darwinism. Selection explains why living things display ...
... he meant by this claim, how later biologists have treated the issues it addresses, and whether (or in what sense) this claim might be true, are the subjects of this book. Part I focuses on natural selection, the central theoretical principle of Darwinism. Selection explains why living things display ...
Leap of Faith: Intelligent Design`s Trajectory after Dover
... modeled loosely on outdated Baconian principles, these writers argued that a proper, literal reading of the inerrant Bible demonstrated that humans could not be related to primates,8 a concept widely accepted among ...
... modeled loosely on outdated Baconian principles, these writers argued that a proper, literal reading of the inerrant Bible demonstrated that humans could not be related to primates,8 a concept widely accepted among ...
Space, sympatry and speciation
... speciation to be rare, as well as making it nearly impossible to demonstrate in nature. Yet some authors have recently favoured the m = 0.5 criterion of sympatry when discussing speciation in nature (e.g. Coyne & Orr, 2004), and for this reason alone it is not surprising that they regard sympatric s ...
... speciation to be rare, as well as making it nearly impossible to demonstrate in nature. Yet some authors have recently favoured the m = 0.5 criterion of sympatry when discussing speciation in nature (e.g. Coyne & Orr, 2004), and for this reason alone it is not surprising that they regard sympatric s ...
- Wiley Online Library
... understanding of growth trade-offs will benefit from investigations of the underlying neuroendocrine processes. Significant advances in this direction are currently being made in some model systems (references in Zera & Harshman 2001). Finally, it would be important to address experimentally the imp ...
... understanding of growth trade-offs will benefit from investigations of the underlying neuroendocrine processes. Significant advances in this direction are currently being made in some model systems (references in Zera & Harshman 2001). Finally, it would be important to address experimentally the imp ...
Ever Since Darwin - A Website About Stephen Jay Gould`s Essays
... reproduce – and even if it were, more than a rhetorical claim of analogy would be required to prove it. The underlying importance of natural selection in the Darwinist paradigm, Bethell notes (and Gould agrees), is that it is responsible for the creation of new species. Variation is present and very ...
... reproduce – and even if it were, more than a rhetorical claim of analogy would be required to prove it. The underlying importance of natural selection in the Darwinist paradigm, Bethell notes (and Gould agrees), is that it is responsible for the creation of new species. Variation is present and very ...
Pre-adaptation, exaptation and technology speciation: a comment
... of the basic principles of evolutionary theory, that the process of natural selection involves no foresight. It also contradicts the intended meaning advocates want to give to pre-adaptation, as I understand it. As a result of these contradictions, evolutionary biologists struggled for many years wi ...
... of the basic principles of evolutionary theory, that the process of natural selection involves no foresight. It also contradicts the intended meaning advocates want to give to pre-adaptation, as I understand it. As a result of these contradictions, evolutionary biologists struggled for many years wi ...
PatMat6_MW_2015_02_06_arc
... preconditions required for natural selection to act. The first of these – over-reproduction leading to a struggle for existence – is well described both in the passage above and elsewhere. The second – the need for variation as the raw ingredient for natural selection – is described, for example, i ...
... preconditions required for natural selection to act. The first of these – over-reproduction leading to a struggle for existence – is well described both in the passage above and elsewhere. The second – the need for variation as the raw ingredient for natural selection – is described, for example, i ...
The Living World - McGraw Hill Higher Education
... Encompasses the origins of new species and major episodes of extinction Microevolution Evolutionary change on a small scale Encompasses the genetic changes that occur within a species over time These changes are the result of changes in gene frequencies Copyright ©The McGraw-Hill Companies, Inc. Per ...
... Encompasses the origins of new species and major episodes of extinction Microevolution Evolutionary change on a small scale Encompasses the genetic changes that occur within a species over time These changes are the result of changes in gene frequencies Copyright ©The McGraw-Hill Companies, Inc. Per ...
Chapter 13
... Encompasses the origins of new species and major episodes of extinction Microevolution Evolutionary change on a small scale Encompasses the genetic changes that occur within a species over time These changes are the result of changes in gene frequencies Copyright ©The McGraw-Hill Companies, Inc. Per ...
... Encompasses the origins of new species and major episodes of extinction Microevolution Evolutionary change on a small scale Encompasses the genetic changes that occur within a species over time These changes are the result of changes in gene frequencies Copyright ©The McGraw-Hill Companies, Inc. Per ...
The Living World
... Encompasses the origins of new species and major episodes of extinction Microevolution Evolutionary change on a small scale Encompasses the genetic changes that occur within a species over time These changes are the result of changes in gene frequencies Copyright ©The McGraw-Hill Companies, Inc. Per ...
... Encompasses the origins of new species and major episodes of extinction Microevolution Evolutionary change on a small scale Encompasses the genetic changes that occur within a species over time These changes are the result of changes in gene frequencies Copyright ©The McGraw-Hill Companies, Inc. Per ...
Mechanisms of constraints: the contributions of selection and
... Although naturalists, quantitative geneticists, and developmental biologists have long noted that plants frequently have abnormal numbers of cotyledons, this phenomenon is poorly understood. Our results strongly suggest that cotyledon numbers less than two are selected against. Some of this selectio ...
... Although naturalists, quantitative geneticists, and developmental biologists have long noted that plants frequently have abnormal numbers of cotyledons, this phenomenon is poorly understood. Our results strongly suggest that cotyledon numbers less than two are selected against. Some of this selectio ...
Homology and hierarchies - Duke University | Center for Philosophy
... replication of gross phenotypic characteristics within individual organisms that results in iterative homologues, to the replication of individuals to form a population that persists (in replication through successive generations) in evolutionary time. In replication, biological information may pers ...
... replication of gross phenotypic characteristics within individual organisms that results in iterative homologues, to the replication of individuals to form a population that persists (in replication through successive generations) in evolutionary time. In replication, biological information may pers ...