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Dynamics of Intraguild Predation Systems with Intraspecific Competition
Bulletin of Mathematical Biology, 2018This paper considers intraguild predation (IGP) systems where species in the same community kill and eat each other and there is intraspecific competition in each species. The IGP systems are characterized by a lattice gas model, in which reaction between sites on the lattice occurs in a random and independent way. Global dynamics of the model with two
Wang, Yuanshi +3 more
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Intraspecific competition in a social spider
Ecological Modelling, 1999An individual-based model was developed to investigate the population dynamics of a permanently-social spider, Stegodyphus dumicola (Eresidae), in relation to intraspecific competition for food. This further develops our initial model that demonstrated that individual variability in body mass causes contest competition and is based on it.
Karin Ulbrich, JohannesR. Henschel
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Understanding intraspecific and apparent competition
2022AbstractInterspecific competition shares the same dependence on consumer–resource interactions as intraspecific competition and apparent competition. These two related interactions are the subject of this chapter. Both interactions are present in most, if not all, systems in which interspecific competition occurs.
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Nigerian Weed Species: Intraspecific Competition
Weed Science, 1978Four weed species, eragrostis (Eragrostis tenella Roem. and Schult), cogongrass [Imperata cylindrica (L.) Beauv.], synedrella (Synedrella nodiflora Gaertn.) and tridax (Tridax procumbens L.) were planted at 5, 10, 15, 20 or 25 plants per pot. Competition affected shoot and root dry weights, height, and leaf number of all species and the reproductive ...
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T6SS intraspecific competition orchestrates Vibrio cholerae genotypic diversity.
International microbiology : the official journal of the Spanish Society for Microbiology, 2017Vibrio cholerae is a diverse species that inhabits a wide range of environments from copepods in brackish water to the intestines of humans. In order to remain competitive, V. cholerae uses the versatile type-VI secretion system (T6SS) to secrete anti-prokaryotic and anti-eukaryotic effectors.
Kostiuk, Benjamin +3 more
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Intraspecific Competitive Divergence and Convergence under Assortative Mating
The American Naturalist, 2006Ecologically driven sympatric speciation has received much attention recently. We investigate a multilocus model of a quantitative trait that is under frequency-dependent selection caused by intraspecific competition and acts as mating character for assortment.
Bürger, Reinhard, Schneider, Kristan
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Effects of Temperature on Intraspecific Competition in Ectotherms
The American Naturalist, 2014Understanding how temperature influences population regulation through its effects on intraspecific competition is an important question for which there is currently little theory or data. Here we develop a theoretical framework for elucidating temperature effects on competition that integrates mechanistic descriptions of life-history trait responses ...
Amarasekare, Priyanga +1 more
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Evolution of dominance under frequency-dependent intraspecific competition
Journal of Theoretical Biology, 2008A population-genetic analysis is performed of a two-locus two-allele model, in which the primary locus has a major effect on a quantitative trait that is under frequency-dependent disruptive selection caused by intraspecific competition for a continuum of resources. The modifier locus determines the degree of dominance at the trait level.
Peischl, Stephan, Bürger, Reinhard
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Intraspecific Competition and Evolution
1988Adaptation through natural selection is one of the key elements of the Darwinian theory of evolution. This process has been the focus of much attention, partly because of its importance in the understanding of biological evolution, and partly because it appears as a nice directed deterministic process.
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Intraspecific Competition of Hydrilla verticillata
Weed Science, 1980Studies in outdoor, circular pools have shown that one shoot tip of hydrilla (Hydrilla verticillata Royle) produced as much plant dry weight during a 16-week period as 16 tips planted under the same conditions. Dry weight of plants 16 weeks after planting was as high as 1,561 times that of the shoot tips planted.
David L. Sutton +2 more
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