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Svensson EI, Waller JT. Ecology and Sexual Selection: Evolution of Wing Pigmentation in Calopterygid Damselflies in Relation to Latitude, Sexual Dimorphism, and Speciation. Am Nat 2013; 182:E174-95. [DOI: 10.1086/673206] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Plesnar-Bielak A, Skrzynecka AM, Prokop ZM, Kolasa M, Działo M, Radwan J. No evidence for reproductive isolation through sexual conflict in the bulb mite Rhizoglyphus robini. PLoS One 2013; 8:e74971. [PMID: 24069369 PMCID: PMC3777893 DOI: 10.1371/journal.pone.0074971] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 08/09/2013] [Indexed: 11/18/2022] Open
Abstract
Sexual conflict leading to sexual antagonistic coevolution has been hypothesized to drive reproductive isolation in allopatric populations and hence lead to speciation. However, the generality of this speciation mechanism is under debate. We used experimental evolution in the bulb mite Rhizoglyphusrobini to investigate whether sexual conflict promotes reproductive isolation measured comprehensively to include all possible pre- and post-zygotic mechanisms. We established replicate populations in which we either enforced monogamy, and hence removed sexual conflict by making male and female evolutionary interests congruent, or allowed promiscuity. After 35 and 45 generations of experimental evolution, we found no evidence of reproductive isolation between the populations in any of the mating systems. Our results indicate that sexual conflict does not necessarily drive fast reproductive isolation and it may not be a ubiquitous mechanism leading to speciation.
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Labonne J, Vignon M, Prévost E, Lecomte F, Dodson JJ, Kaeuffer R, Aymes JC, Jarry M, Gaudin P, Davaine P, Beall E. Invasion dynamics of a fish-free landscape by brown trout (Salmo trutta). PLoS One 2013; 8:e71052. [PMID: 23990925 PMCID: PMC3749212 DOI: 10.1371/journal.pone.0071052] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 06/25/2013] [Indexed: 11/21/2022] Open
Abstract
Metapopulation dynamics over the course of an invasion are usually difficult to grasp because they require large and reliable data collection, often unavailable. The invasion of the fish-free freshwater ecosystems of the remote sub-Antarctic Kerguelen Islands following man-made introductions of brown trout (Salmo trutta) in the 1950's is an exception to this rule. Benefiting from a full long term environmental research monitoring of the invasion, we built a Bayesian dynamic metapopulation model to analyze the invasion dynamics of 85 river systems over 51 years. The model accounted for patch size (river length and connections to lakes), alternative dispersal pathways between rivers, temporal trends in dynamics, and uncertainty in colonization date. The results show that the model correctly represents the observed pattern of invasion, especially if we assume a coastal dispersal pathway between patches. Landscape attributes such as patch size influenced the colonization function, but had no effect on propagule pressure. Independently from patch size and distance between patches, propagule pressure and colonization function were not constant through time. Propagule pressure increased over the course of colonization, whereas the colonization function decreased, conditional on propagule pressure. The resulting pattern of this antagonistic interplay is an initial rapid invasion phase followed by a strong decrease in the invasion rate. These temporal trends may be due to either adaptive processes or environmental gradients encountered along the colonization front. It was not possible to distinguish these two hypotheses. Because invasibility of Kerguelen Is. freshwater ecosystems is very high due to the lack of a pre-existing fish fauna and minimal human interference, our estimates of invasion dynamics represent a blueprint for the potential of brown trout invasiveness in pristine environments. Our conclusions shed light on the future of polar regions where, because of climate change, fish-free ecosystems become increasingly accessible to invasion by fish species.
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Affiliation(s)
- Jacques Labonne
- INRA, UMR 1224, ECOBIOP, Pôle d'Hydrobiologie, Saint-Pée sur Nivelle, France
- * E-mail:
| | - Matthias Vignon
- UPPA, UMR 1224, ECOBIOP, Pôle d'Hydrobiologie, Saint-Pée sur Nivelle, France
| | - Etienne Prévost
- INRA, UMR 1224, ECOBIOP, Pôle d'Hydrobiologie, Saint-Pée sur Nivelle, France
| | - Frédéric Lecomte
- Ministère des Ressources naturelles et de la Faune du Québec, Québec, Canada
| | - Julian J. Dodson
- Université Laval, Département de Biologie, Pavillon Vachon, Québec, Canada
| | - Renaud Kaeuffer
- Redpath Museum and Department of Biology, McGill University, Montreal, Quebec, Canada
| | | | - Marc Jarry
- UPPA, UMR 1224, ECOBIOP, Pôle d'Hydrobiologie, Saint-Pée sur Nivelle, France
| | - Philippe Gaudin
- INRA, UMR 1224, ECOBIOP, Pôle d'Hydrobiologie, Saint-Pée sur Nivelle, France
| | - Patrick Davaine
- INRA, UMR 1224, ECOBIOP, Pôle d'Hydrobiologie, Saint-Pée sur Nivelle, France
| | - Edward Beall
- INRA, UMR 1224, ECOBIOP, Pôle d'Hydrobiologie, Saint-Pée sur Nivelle, France
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Potti J, Canal D, Serrano D. Lifetime fitness and age-related female ornament signalling: evidence for survival and fecundity selection in the pied flycatcher. J Evol Biol 2013; 26:1445-57. [DOI: 10.1111/jeb.12145] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 02/14/2013] [Accepted: 02/17/2013] [Indexed: 11/28/2022]
Affiliation(s)
- J. Potti
- Department of Evolutionary Ecology; Estación Biológica de Doñana - CSIC; Seville Spain
| | - D. Canal
- Department of Evolutionary Ecology; Estación Biológica de Doñana - CSIC; Seville Spain
| | - D. Serrano
- Department of Conservation Biology; Estación Biológica de Doñana - CSIC; Seville Spain
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Holman L, Kokko H. The consequences of polyandry for population viability, extinction risk and conservation. Philos Trans R Soc Lond B Biol Sci 2013; 368:20120053. [PMID: 23339244 DOI: 10.1098/rstb.2012.0053] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Polyandry, by elevating sexual conflict and selecting for reduced male care relative to monandry, may exacerbate the cost of sex and thereby seriously impact population fitness. On the other hand, polyandry has a number of possible population-level benefits over monandry, such as increased sexual selection leading to faster adaptation and a reduced mutation load. Here, we review existing information on how female fitness evolves under polyandry and how this influences population dynamics. In balance, it is far from clear whether polyandry has a net positive or negative effect on female fitness, but we also stress that its effects on individuals may not have visible demographic consequences. In populations that produce many more offspring than can possibly survive and breed, offspring gained or lost as a result of polyandry may not affect population size. Such ecological 'masking' of changes in population fitness could hide a response that only manifests under adverse environmental conditions (e.g. anthropogenic change). Surprisingly few studies have attempted to link mating system variation to population dynamics, and in general we urge researchers to consider the ecological consequences of evolutionary processes.
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Affiliation(s)
- Luke Holman
- Centre of Excellence in Biological Interactions, Division of Ecology, Evolution and Genetics, Research School of Biology, Australian National University, Canberra, Australian Capital Territory 0200, Australia.
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Knell RJ, Naish D, Tomkins JL, Hone DW. Sexual selection in prehistoric animals: detection and implications. Trends Ecol Evol 2013; 28:38-47. [DOI: 10.1016/j.tree.2012.07.015] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 07/19/2012] [Accepted: 07/25/2012] [Indexed: 11/16/2022]
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Moser D, Roesti M, Berner D. Repeated lake-stream divergence in stickleback life history within a Central European lake basin. PLoS One 2012; 7:e50620. [PMID: 23226528 PMCID: PMC3514289 DOI: 10.1371/journal.pone.0050620] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 10/23/2012] [Indexed: 11/19/2022] Open
Abstract
Life history divergence between populations inhabiting ecologically distinct habitats might be a potent source of reproductive isolation, but has received little attention in the context of speciation. We here test for life history divergence between threespine stickleback inhabiting Lake Constance (Central Europe) and multiple tributary streams. Otolith analysis shows that lake fish generally reproduce at two years of age, while their conspecifics in all streams have shifted to a primarily annual life cycle. This divergence is paralleled by a striking and consistent reduction in body size and fecundity in stream fish relative to lake fish. Stomach content analysis suggests that life history divergence might reflect a genetic or plastic response to pelagic versus benthic foraging modes in the lake and the streams. Microsatellite and mitochondrial markers further reveal that life history shifts in the different streams have occurred independently following the colonization by Lake Constance stickleback, and indicate the presence of strong barriers to gene flow across at least some of the lake-stream habitat transitions. Given that body size is known to strongly influence stickleback mating behavior, these barriers might well be related to life history divergence.
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Affiliation(s)
- Dario Moser
- Zoological Institute, University of Basel, Vesalgasse 1, Basel, Switzerland
| | - Marius Roesti
- Zoological Institute, University of Basel, Vesalgasse 1, Basel, Switzerland
| | - Daniel Berner
- Zoological Institute, University of Basel, Vesalgasse 1, Basel, Switzerland
- * E-mail:
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Wilkins MR, Seddon N, Safran RJ. Evolutionary divergence in acoustic signals: causes and consequences. Trends Ecol Evol 2012; 28:156-66. [PMID: 23141110 DOI: 10.1016/j.tree.2012.10.002] [Citation(s) in RCA: 261] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 09/19/2012] [Accepted: 10/04/2012] [Indexed: 12/24/2022]
Abstract
Acoustic signals mediate mate choice, resource defense, and species recognition in a broad range of taxa. It has been proposed, therefore, that divergence in acoustic signals plays a key role in speciation. Nonetheless, the processes driving divergence of acoustic traits and their consequences in terms of speciation are poorly understood. A review of empirical and comparative studies reveals strong support for a role of sexual selection in acoustic divergence, but the possible concomitant influences of ecological context are rarely examined. We summarize a conceptual framework for testing the relative significance of both adaptive and neutral mechanisms leading to acoustic divergence, predictions for cases where these processes lead to speciation, and how their relative importance plays out over evolutionary time.
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Affiliation(s)
- Matthew R Wilkins
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO 80309-0334, USA.
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