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Roggero A, Alù D, Laini A, Rolando A, Palestrini C. Color polymorphism and mating trends in a population of the alpine leaf beetle Oreina gloriosa. PLoS One 2024; 19:e0298330. [PMID: 38530852 DOI: 10.1371/journal.pone.0298330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 01/18/2024] [Indexed: 03/28/2024] Open
Abstract
The bright colors of Alpine leaf beetles (Coleoptera, Chrysomelidae) are thought to act as aposematic signals against predation. Within the European Alps, at least six species display a basal color of either blue or green, likely configuring a classic case of müllerian mimicry. In this context, intra-population color polymorphism is paradoxical as the existence of numerous color morphs might hamper the establishment of a search image in visual predators. Assortative mating may be one of the main factors contributing to the maintenance of polymorphic populations. Due to the marked iridescence of these leaf beetles, the perceived color may change as the viewing or illumination angle changes. The present study, conducted over three years, involved intensive sampling of a population of Oreina gloriosa from the Italian Alps and applied colorimetry and a decision tree method to identify the color morphs in an objective manner. The tertiary sex ratio of the population was biased in favor of males, suggesting that viviparous females hide to give birth. Seven color morphs were identified, and their frequencies varied significantly over the course of the study. Three different analyses of mating (JMating, QInfomating, and Montecarlo simulations) recognized a general trend for random mating which coexists with some instances of positive and negative assortative mating. This could help explain the pre-eminence of one morph (which would be favored because of positive selection due to positive assortative mating) in parallel with the persistence of six other morphs (maintained due to negative assortative mating).
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Affiliation(s)
- Angela Roggero
- Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy
| | - Daniele Alù
- Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy
| | - Alex Laini
- Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy
| | - Antonio Rolando
- Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy
| | - Claudia Palestrini
- Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy
- NBFC, National Biodiversity Future Center, Palermo, Italy
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Gefaell J, Galindo J, Rolán-Alvarez E. Shell color polymorphism in marine gastropods. Evol Appl 2023; 16:202-222. [PMID: 36793692 PMCID: PMC9923496 DOI: 10.1111/eva.13416] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 04/21/2022] [Accepted: 04/28/2022] [Indexed: 12/01/2022] Open
Abstract
Marine gastropods are characterized by an incredible variation in shell color. In this review, we aim to introduce researchers to previous studies of shell color polymorphism in this group of animals, trying to provide an overview of the topic and highlighting some potential avenues for future research. For this, we tackle the different aspects of shell color polymorphism in marine gastropods: its biochemical and genetic basis, its patterns of spatial and temporal distribution, as well as its potential evolutionary causes. In particular, we put special emphasis on the evolutionary studies that have been conducted so far to reveal the evolutionary mechanisms responsible for the maintenance of shell color polymorphism in this group of animals, as it constitutes the least addressed aspect in existing literature reviews. Several general conclusions can be drawn from our review: First, natural selection is commonly involved in the maintenance of gastropod color polymorphism; second, although the contribution of neutral forces (gene flow-genetic drift equilibrium) to shell color polymorphism maintenance do not seem to be particularly important, it has rarely been studied systematically; third, a relationship between shell color polymorphism and mode of larval development (related to dispersal capability) may exist. As for future studies, we suggest that a combination of both classical laboratory crossing experiments and -Omics approaches may yield interesting results on the molecular basis of color polymorphism. We believe that understanding the various causes of shell color polymorphism in marine gastropods is of great importance not only to understand how biodiversity works, but also for protecting such biodiversity, as knowledge of its evolutionary causes may help implement conservation measures in those species or ecosystems that are threatened.
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Affiliation(s)
- Juan Gefaell
- Departamento de Bioquímica Genética e Inmunología Centro de Investigación Mariña Universidade de Vigo Vigo Spain
| | - Juan Galindo
- Departamento de Bioquímica Genética e Inmunología Centro de Investigación Mariña Universidade de Vigo Vigo Spain
| | - Emilio Rolán-Alvarez
- Departamento de Bioquímica Genética e Inmunología Centro de Investigación Mariña Universidade de Vigo Vigo Spain
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McMahon O, Smyth T, Davies TW. Broad spectrum artificial light at night increases the conspicuousness of camouflaged prey. J Appl Ecol 2022. [DOI: 10.1111/1365-2664.14146] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Oak McMahon
- School of Biological and Marine Sciences University of Plymouth Plymouth UK
| | - Tim Smyth
- Plymouth Marine Laboratory Plymouth UK
| | - Thomas W. Davies
- School of Biological and Marine Sciences University of Plymouth Plymouth UK
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Garba M, Loiseau A, Tatard C, Benoit L, Gauthier N. Patterns and drivers of genetic diversity and structure in the biological control parasitoid Habrobracon hebetor in Niger. BULLETIN OF ENTOMOLOGICAL RESEARCH 2019; 109:794-811. [PMID: 30968790 DOI: 10.1017/s0007485319000142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
When a promising natural enemy of a key pest exists locally, it is a common practice in biological control (BC) to rear and release it for supplementary control in the targeted agroecosystem even though significant knowledge gaps concerning pre/post release may still exist. Incorporating genetic information into BC research fills some of these gaps. Habrobracon hebetor, a parasitoid of many economically important moths that infest stored and field crops worldwide is commonly used, particularly against the millet head miner (MHM), a key pest of millet in Sahelian countries. To advance our knowledge on how H. hebetor that occurs naturally in open-field cropping systems and grain stores as well as being mass-produced and released for MHM control, performs in millet agroecosystems in Niger we evaluated its population genetics using two mitochondrial and 21 microsatellite markers. The field samples were genetically more diverse and displayed heterozygote excess. Very few field samples had faced significant recent demographic bottlenecks. The mating system (i.e. nonrandom mating with complementary sex determination) of this species may be the major driver of these findings rather than bottlenecks caused by the small number of individuals released and the scarcity of hosts during the longlasting dry season in Niger. H. hebetor population structure was represented by several small patches and genetically distinct individuals. Gene flow occurred at local and regional scales through human-mediated and natural short-distance dispersal. These findings highlight the importance of the mating system in the genetic diversity and structure of H. hebetor populations, and contribute to our understanding of its reported efficacy against MHM in pearl millet fields.
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Affiliation(s)
- M Garba
- Direction Générale de la Protection des Végétaux, Ministère de l'Agriculture, BP323, Niamey, Niger
| | - A Loiseau
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier, Montpellier, France
| | - C Tatard
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier, Montpellier, France
| | - L Benoit
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier, Montpellier, France
| | - N Gauthier
- CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, Univ. Montpellier, Montpellier, France
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Robertson JM, Nava R, Vega A, Kaiser K. Uniformity in premating reproductive isolation along an intraspecific cline. Curr Zool 2018; 64:641-652. [PMID: 30323843 PMCID: PMC6178793 DOI: 10.1093/cz/zox066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 11/10/2017] [Indexed: 11/17/2022] Open
Abstract
Premating reproductive isolation (RI) may reduce gene flow across populations that have differentiated in traits important for mate choice. Examining RI across genetic and phenotypic clines can inform the fundamental evolutionary processes that underlie population and lineage differentiation. We conducted female mate-choice studies across an intraspecific red-eyed treefrog cline in Costa Rica and Panama with 2 specific aims: (1) to characterize RI across the cline and examine the relationship between premating RI and genetic and phenotypic distance and (2) to evaluate our results within a broader evolutionary and taxonomic perspective through examination of other RI studies. We found that female red-eyed treefrogs prefer local males relative to non-local males, indicating that some premating RI has evolved in this system, but that preference strength is not associated with phenotypic or geographic distance. Our analysis of 65 other studies revealed no clear pattern between the strength of RI and geographic distribution (allopatry, parapatry, cline) or phenotypic distance, but revealed extreme variation and overlap in levels of intra- and interspecific levels of RI. This work contributes to a growing body of literature that examines intraspecific RI across a cline to understand the selective processes that shape evolutionary patterns at the earliest stages of divergence.
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Affiliation(s)
- Jeanne Marie Robertson
- Department of Biology, California State University, Northridge, 18111 Nordhoff Street, Northridge, CA, USA.,Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA, USA
| | - Roman Nava
- Department of Biology, California State University, Northridge, 18111 Nordhoff Street, Northridge, CA, USA.,Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA, USA
| | - Andrés Vega
- AMBICOR, 400 E., 75 S., 75 E. de la Municipalidad de Tibas, Tibas, Costa Rica
| | - Kristine Kaiser
- Department of Biology, California State University, Northridge, 18111 Nordhoff Street, Northridge, CA, USA.,Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA, USA
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Chang CH, Schult JE, Sanders J, Liu SH, Fuller RC. The vertical distributions and spawning site choices of red and yellow bluefin killifish Lucania goodei colour morphs. JOURNAL OF FISH BIOLOGY 2018; 93:396-400. [PMID: 30241110 DOI: 10.1111/jfb.13661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 05/27/2018] [Indexed: 06/08/2023]
Abstract
A genetic colour polymorphism is present in bluefin killifish Lucania goodei, where red and yellow anal-fin morphs coexist in clear springs, but the source of balancing selection is unknown. In a field study, vertical distributions did not differ between the morphs and there was little evidence that light environments differed qualitatively over the 200 cm at which fish were collected. A greenhouse study showed that both morphs preferred to spawn at shallow depths and hence vertical distribution and spawning site choice are unlikely to explain the maintenance of the colour polymorphism.
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Affiliation(s)
- Chia-Hao Chang
- Department of Animal Biology, School of Integrative Biology, University of Illinois, Champaign, Illinois
| | - Jessica E Schult
- College of Veterinary Medicine, University of Illinois, Champaign, Illinois
| | - Jonathan Sanders
- School of Integrative Biology, University of Illinois, Champaign, Illinois
| | - Shih-Hui Liu
- Biodiversity Research Center, Academia Sinica, Taipei City, Taiwan
| | - Rebecca C Fuller
- Department of Animal Biology, School of Integrative Biology, University of Illinois, Champaign, Illinois
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Ravinet M. Notes from a snail island: Littorinid evolution and adaptation. Mol Ecol 2018; 27:2781-2789. [PMID: 29802775 DOI: 10.1111/mec.14730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/01/2018] [Accepted: 05/06/2018] [Indexed: 12/20/2022]
Abstract
The most successful study systems are built on a foundation of decades of research on the basic biology, ecology and life history of the organisms in question. Combined with new technologies, this can provide a formidable means to address important issues in evolutionary biology and molecular ecology. Littorinid marine snails are a good example of this, with a rich literature on their taxonomy, speciation, thermal tolerance and behavioural adaptations. In August 2017, an international meeting on Littorinid evolution was held at the Tjärnö Marine Research Laboratory in Western Sweden. In this meeting review, I provide a summary of some of the exciting work on parallel evolution, sexual selection and adaptation to environmental stress presented there. I argue that newly available genomic resources present an opportunity for integrating the traditionally divergent fields of speciation and environmental adaptation in Littorinid research.
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Affiliation(s)
- Mark Ravinet
- Centre for Ecological and Evolutionary Synthesis, University of Oslo, Oslo, Norway
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Rolán-Alvarez E, Carvajal-Rodríguez A, de Coo A, Cortés B, Estévez D, Ferreira M, González R, Briscoe AD. The scale-of-choice effect and how estimates of assortative mating in the wild can be biased due to heterogeneous samples. Evolution 2015; 69:1845-57. [DOI: 10.1111/evo.12691] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Accepted: 05/13/2015] [Indexed: 01/30/2023]
Affiliation(s)
- Emilio Rolán-Alvarez
- Departamento de Bioquímica, Xenética e Inmunoloxía, Facultade de Bioloxía; Universidad de Vigo; 36310 Vigo Spain
- Department of Ecology and Evolutionary Biology; University of California; Irvine California 92697
| | - Antonio Carvajal-Rodríguez
- Departamento de Bioquímica, Xenética e Inmunoloxía, Facultade de Bioloxía; Universidad de Vigo; 36310 Vigo Spain
| | - Alicia de Coo
- Departamento de Bioquímica, Xenética e Inmunoloxía, Facultade de Bioloxía; Universidad de Vigo; 36310 Vigo Spain
| | - Beatriz Cortés
- Departamento de Bioquímica, Xenética e Inmunoloxía, Facultade de Bioloxía; Universidad de Vigo; 36310 Vigo Spain
| | - Daniel Estévez
- Departamento de Bioquímica, Xenética e Inmunoloxía, Facultade de Bioloxía; Universidad de Vigo; 36310 Vigo Spain
| | - Mar Ferreira
- Departamento de Bioquímica, Xenética e Inmunoloxía, Facultade de Bioloxía; Universidad de Vigo; 36310 Vigo Spain
| | - Rubén González
- Departamento de Bioquímica, Xenética e Inmunoloxía, Facultade de Bioloxía; Universidad de Vigo; 36310 Vigo Spain
| | - Adriana D. Briscoe
- Department of Ecology and Evolutionary Biology; University of California; Irvine California 92697
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Lancaster LT, McAdam AG, Hipsley CA, Sinervo BR. Frequency-dependent and correlational selection pressures have conflicting consequences for assortative mating in a color-polymorphic lizard, Uta stansburiana. Am Nat 2014; 184:188-97. [PMID: 25058279 DOI: 10.1086/676645] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Genetically determined polymorphisms incorporating multiple traits can persist in nature under chronic, fluctuating, and sometimes conflicting selection pressures. Balancing selection among morphs preserves equilibrium frequencies, while correlational selection maintains favorable trait combinations within each morph. Under negative frequency-dependent selection, females should mate (often disassortatively) with rare male morphotypes to produce conditionally fit offspring. Conversely, under correlational selection, females should mate assortatively to preserve coadapted gene complexes and avoid ontogenetic conflict. Using controlled breeding designs, we evaluated consequences of assortative mating patterns in color-polymorphic side-blotched lizards (Uta stansburiana), to identify conflict between these sources of selection. Females who mated disassortatively, and to conditionally high-quality males in the context of frequency-dependent selection, experienced highest fertility rates. In contrast, assortatively mated females experienced higher fetal viability rates. The trade-off between fertility and egg viability resulted in no overall fitness benefit to either assortative or disassortative mating patterns. These results suggest that ongoing conflict between correlational and frequency dependent selection in polymorphic populations may generate a trade-off between rare-morph advantage and phenotypic integration and between assortative and disassortative mating decisions. More generally, interactions among multiple sources of diversity-promoting selection can alter adaptations and dynamics predicted to arise under any of these regimes alone.
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Affiliation(s)
- Lesley T Lancaster
- Institute of Biological and Environmental Sciences, Zoology Building, Tillydrone Avenue, Aberdeen AB24 2TZ, United Kingdom
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Culumber ZW, Rosenthal GG. Mating preferences do not maintain the tailspot polymorphism in the platyfish, Xiphophorus variatus. Behav Ecol 2013. [DOI: 10.1093/beheco/art063] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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