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Astudillo-Clavijo V, Varella H, Mankis T, López-Fernández H. Historical Field Records Reveal Habitat as an Ecological Correlate of Locomotor Phenotypic Diversity in the Radiation of Neotropical Geophagini Fishes. Am Nat 2024; 204:147-164. [PMID: 39008839 DOI: 10.1086/730783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
AbstractPhenotypic macroevolutionary studies provide insight into how ecological processes shape biodiversity. However, the complexity of phenotype-ecology relationships underscores the importance of also validating phenotype-based ecological inference with direct evidence of resource use. Unfortunately, macroevolutionary-scale ecological studies are often hindered by the challenges of acquiring taxonomically and spatially representative ecological data for large and widely distributed clades. The South American cichlid fish tribe Geophagini represents a continentally distributed radiation whose early locomotor morphological divergence suggests habitat as one ecological correlate of diversification, but an association between locomotor traits and habitat preference has not been corroborated. Field notes accumulated over decades of collecting across South America provide firsthand environmental records that can be mined for habitat data in support of macroevolutionary ecological research. In this study, we applied a newly developed method to transform descriptive field note information into quantitative habitat data and used it to assess habitat preference and its relationship to locomotor morphology in Geophagini. Field note-derived data shed light on geophagine habitat use patterns and reinforced habitat as an ecological correlate of locomotor morphological diversity. Our work emphasizes the rich data potential of museum collections, including often-overlooked material such as field notes, for evolutionary and ecological research.
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Edgley DE, Carruthers M, Gabagambi NP, Saxon AD, Smith AM, Joyce DA, Vernaz G, Santos ME, Turner GF, Genner MJ. Lateral line system diversification during the early stages of ecological speciation in cichlid fish. BMC Ecol Evol 2024; 24:24. [PMID: 38378480 PMCID: PMC10877828 DOI: 10.1186/s12862-024-02214-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 02/09/2024] [Indexed: 02/22/2024] Open
Abstract
BACKGROUND The mechanosensory lateral line system is an important sensory modality in fishes, informing multiple behaviours related to survival including finding food and navigating in dark environments. Given its ecological importance, we may expect lateral line morphology to be under disruptive selection early in the ecological speciation process. Here we quantify the lateral line system morphology of two ecomorphs of the cichlid fish Astatotilapia calliptera in crater Lake Masoko that have diverged from common ancestry within the past 1,000 years. RESULTS Based on geometric morphometric analyses of CT scans, we show that the zooplanktivorous benthic ecomorph that dominates the deeper waters of the lake has large cranial lateral line canal pores, relative to those of the nearshore invertebrate-feeding littoral ecomorph found in the shallower waters. In contrast, fluorescence imaging revealed no evidence for divergence between ecomorphs in the number of either superficial or canal neuromasts. We illustrate the magnitude of the variation we observe in Lake Masoko A. calliptera in the context of the neighbouring Lake Malawi mega-radiation that comprises over 700 species. CONCLUSIONS These results provide the first evidence of divergence in this often-overlooked sensory modality in the early stages of ecological speciation, suggesting that it may have a role in the broader adaptive radiation process.
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Affiliation(s)
- Duncan E Edgley
- School of Biological Sciences, University of Bristol, Bristol, UK.
| | - Madeleine Carruthers
- School of Biological Sciences, University of Bristol, Bristol, UK
- School of Biological and Behavioural Sciences, Queen Mary University of London, London, UK
| | - Nestory P Gabagambi
- Tanzania Fisheries Research Institute, Kyela Centre, P.O. Box 98, Kyela, Mbeya, Tanzania
| | - Andrew D Saxon
- School of Biological Sciences, University of Bristol, Bristol, UK
| | - Alan M Smith
- School of Natural Sciences, University of Hull, Hull, UK
| | - Domino A Joyce
- School of Natural Sciences, University of Hull, Hull, UK
| | - Grégoire Vernaz
- Department of Genetics, University of Cambridge, Downing Street, Cambridge, UK
- Wellcome/Cancer Research UK, Gurdon Institute, University of Cambridge, Cambridge, UK
| | - M Emília Santos
- Department of Zoology, University of Cambridge, Cambridge, UK
| | | | - Martin J Genner
- School of Biological Sciences, University of Bristol, Bristol, UK.
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3
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Sakamoto S, Matsushita Y, Itoigawa A, Ezawa T, Fujitani T, Takakura K, Zhou Y, Zhang G, Grutzner F, Kawamura S, Hayakawa T. Color vision evolution in egg-laying mammals: insights from visual photoreceptors and daily activities of Australian echidnas. ZOOLOGICAL LETTERS 2024; 10:2. [PMID: 38167154 PMCID: PMC10759620 DOI: 10.1186/s40851-023-00224-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 11/29/2023] [Indexed: 01/05/2024]
Abstract
Egg-laying mammals (monotremes) are considered "primitive" due to traits such as oviparity, cloaca, and incomplete homeothermy, all of which they share with reptiles. Two groups of monotremes, the terrestrial echidna (Tachyglossidae) and semiaquatic platypus (Ornithorhynchidae), have evolved highly divergent characters since their emergence in the Cenozoic era. These evolutionary differences, notably including distinct electrosensory and chemosensory systems, result from adaptations to species-specific habitat conditions. To date, very few studies have examined the visual adaptation of echidna and platypus. In the present study, we show that echidna and platypus have different light absorption spectra in their dichromatic visual sensory systems at the molecular level. We analyzed absorption spectra of monotreme color opsins, long-wavelength sensitive opsin (LWS) and short-wavelength sensitive opsin 2 (SWS2). The wavelength of maximum absorbance (λmax) in LWS was 570.2 in short-beaked echidna (Tachyglossus aculeatus) and 560.6 nm in platypus (Ornithorhynchus anatinus); in SWS2, λmax was 451.7 and 442.6 nm, respectively. Thus, the spectral range in echidna color vision is ~ 10 nm longer overall than in platypus. Natural selection analysis showed that the molecular evolution of monotreme color opsins is generally functionally conserved, suggesting that these taxa rely on species-specific color vision. In order to understand the usage of color vision in monotremes, we made 24-h behavioral observations of captive echidnas at warm temperatures and analyzed the resultant ethograms. Echidnas showed cathemeral activity and various behavioral repertoires such as feeding, traveling, digging, and self-grooming without light/dark environment selectivity. Halting (careful) behavior is more frequent in dark conditions, which suggests that echidnas may be more dependent on vision during the day and olfaction at night. Color vision functions have contributed to dynamic adaptations and dramatic ecological changes during the ~ 60 million years of divergent monotreme evolution. The ethogram of various day and night behaviors in captive echidnas also contributes information relevant to habitat conservation and animal welfare in this iconic species, which is locally endangered.
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Affiliation(s)
- Shiina Sakamoto
- Graduate School of Environmental Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yuka Matsushita
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, Japan
| | - Akihiro Itoigawa
- Department of Agricultural Chemistry, School of Agriculture, Meiji University, Kawasaki, Kanagawa, Japan
- Japan Society for the Promotion of Science, Tokyo, Japan
| | - Takumi Ezawa
- Graduate School of Environmental Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | | | | | - Yang Zhou
- BGI Research, Shenzhen, China
- BGI Research, Wuhan, China
| | - Guojie Zhang
- Center of Evolutionary & Organismal Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Frank Grutzner
- The Environment Institute, University of Adelaide, Adelaide, SA, Australia
| | - Shoji Kawamura
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, Japan.
| | - Takashi Hayakawa
- Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Hokkaido, Japan.
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4
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Ricci V, Ronco F, Boileau N, Salzburger W. Visual opsin gene expression evolution in the adaptive radiation of cichlid fishes of Lake Tanganyika. SCIENCE ADVANCES 2023; 9:eadg6568. [PMID: 37672578 PMCID: PMC10482347 DOI: 10.1126/sciadv.adg6568] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 08/07/2023] [Indexed: 09/08/2023]
Abstract
Tuning the visual sensory system to the ambient light is essential for survival in many animal species. This is often achieved through duplication, functional diversification, and/or differential expression of visual opsin genes. Here, we examined 753 new retinal transcriptomes from 112 species of cichlid fishes from Lake Tanganyika to unravel adaptive changes in gene expression at the macro-evolutionary and ecosystem level of one of the largest vertebrate adaptive radiations. We found that, across the radiation, all seven cone opsins-but not the rhodopsin-rank among the most differentially expressed genes in the retina, together with other vision-, circadian rhythm-, and hemoglobin-related genes. We propose two visual palettes characteristic of very shallow- and deep-water living species, respectively, and show that visual system adaptations along two major ecological axes, macro-habitat and diet, occur primarily via gene expression variation in a subset of cone opsin genes.
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Affiliation(s)
- Virginie Ricci
- Zoological Institute, Department of Environmental Sciences, University of Basel, Basel, Switzerland
| | - Fabrizia Ronco
- Zoological Institute, Department of Environmental Sciences, University of Basel, Basel, Switzerland
- Natural History Museum, University of Oslo, Oslo, Norway
| | - Nicolas Boileau
- Zoological Institute, Department of Environmental Sciences, University of Basel, Basel, Switzerland
| | - Walter Salzburger
- Zoological Institute, Department of Environmental Sciences, University of Basel, Basel, Switzerland
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Wilwert E, Etienne RS, van de Zande L, Maan ME. Contribution of opsins and chromophores to cone pigment variation across populations of Lake Victoria cichlids. JOURNAL OF FISH BIOLOGY 2022; 101:365-377. [PMID: 34860424 PMCID: PMC9543281 DOI: 10.1111/jfb.14969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 09/24/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
Adaptation to heterogeneous sensory environments has been implicated as a key parameter in speciation. Cichlid fish are a textbook example of divergent visual adaptation, mediated by variation in the sequences and expression levels of cone opsin genes (encoding the protein component of visual pigments). In some vertebrates including fish, visual sensitivity is also tuned by the ratio of vitamin A1 /A2 -derived chromophores (i.e., the light-sensitive component of the visual pigment bound to the opsin protein), where higher proportions of A2 cause a more red-shifted wavelength absorbance. This study explores the variation in chromophore ratios across multiple cichlid populations in Lake Victoria, using as a proxy the expression of the gene Cyp27c1, which has been shown to regulate the conversion of vitamin A1 into vitamin A2 in several vertebrates. This study focuses on sympatric Pundamilia cichlids, where species with blue or red male coloration co-occur at multiple islands but occupy different depths and consequently different visual habitats. In the red species, we found higher cyp27c1 expression in populations from turbid waters than from clear waters, but there was no such pattern in the blue species. Across populations, differences between the sympatric species in cyp27c1 expression had a consistent relationship with species differences in opsin expression patterns, but the red/blue identity reversed between clear and turbid waters. To assess the contribution of heritable vs. environmental causes of variation, we tested whether light manipulations induce a change in cyp27c1 expression in the laboratory. We found that cyp27c1 expression was not influenced by experimental light conditions, suggesting that the observed variation in the wild is due to genetic differences. Nonetheless, compared to other cichlid species, cyp27c1 is expressed at very low levels in Pundamilia, suggesting that it may not be relevant for visual adaptation in this species. Conclusively, establishing the biological importance of this variation requires testing of actual A1 /A2 ratios in the eye, as well as its consequences for visual performance.
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Affiliation(s)
- Elodie Wilwert
- Groningen Institute for Evolutionary Life Sciences (GELIFES)GroningenThe Netherlands
| | - Rampal S. Etienne
- Groningen Institute for Evolutionary Life Sciences (GELIFES)GroningenThe Netherlands
| | - Louis van de Zande
- Groningen Institute for Evolutionary Life Sciences (GELIFES)GroningenThe Netherlands
| | - Martine E. Maan
- Groningen Institute for Evolutionary Life Sciences (GELIFES)GroningenThe Netherlands
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6
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Chang CH. Correlated Expression of the Opsin Retrogene LWS-R and its Host Gene in Two Poeciliid Fishes. Zool Stud 2022; 61:e16. [PMID: 36330033 PMCID: PMC9579955 DOI: 10.6620/zs.2022.61-16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 02/22/2022] [Indexed: 06/16/2023]
Abstract
The important role of retrogenes in genome evolution and species differentiation is becoming increasingly accepted. One synapomorphy among cyprinodontoid fish is a retrotransposed version of a long-wavelength sensitive (LWS) opsin gene, LWS-R, within an intron of the gephyrin (GPHN) gene. These two genes display opposing orientations. It had been speculated that LWS-R hijacks the cis-regulatory elements of GPHN for transcription, but whether their expression is correlated had remained unclear. Here, in silico predictions identified putative promoters upstream of the translation start site of LWS-R, indicating that its transcription is driven by its own promoter rather than by the GPHN promoter. However, consistent expression ratios of LWS-R:GPHN in the eyeball and brain of fishes indicate that the respective gene transcriptions are correlated. Co-expression is potentially modulated by histone exchange during GPHN transcription. Two isoforms were detected in this study, i.e., intron-free and intron-retaining. Intron-free LWS-R was only expressed in the eyeball of fishes, whereas intron-retaining LWS-R occurred in both eyeball and brain. Expression of vision-associated LWS-R beyond the eyeball supports that it is co-expressed with more ubiquitous GPHN.
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Affiliation(s)
- Chia-Hao Chang
- Department of Science Education, National Taipei University of Education, No.134, Sec.2, Heping E. Rd., Da'an District, Taipei City 10671, Taiwan. E-mail: (Chang)
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7
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Ricci V, Ronco F, Musilova Z, Salzburger W. Molecular evolution and depth-related adaptations of rhodopsin in the adaptive radiation of cichlid fishes in Lake Tanganyika. Mol Ecol 2022; 31:2882-2897. [PMID: 35302684 PMCID: PMC9314932 DOI: 10.1111/mec.16429] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 02/11/2022] [Accepted: 03/04/2022] [Indexed: 11/29/2022]
Abstract
The visual sensory system is essential for animals to perceive their environment and is thus under strong selection. In aquatic environments, light intensity and spectrum differ primarily along a depth gradient. Rhodopsin (RH1) is the only opsin responsible for dim‐light vision in vertebrates and has been shown to evolve in response to the respective light conditions, including along a water depth gradient in fishes. In this study, we examined the diversity and sequence evolution of RH1 in virtually the entire adaptive radiation of cichlid fishes in Lake Tanganyika, focusing on adaptations to the environmental light with respect to depth. We show that Tanganyikan cichlid genomes contain a single copy of RH1. The 76 variable amino acid sites detected in RH1 across the radiation were not uniformly distributed along the protein sequence, and 31 of these variable sites show signals of positive selection. Moreover, the amino acid substitutions at 15 positively selected sites appeared to be depth‐related, including three key tuning sites that directly mediate shifts in the peak spectral sensitivity, one site involved in protein stability and 11 sites that may be functionally important on the basis of their physicochemical properties. Among the strongest candidate sites for deep‐water adaptations are two known key tuning sites (positions 292 and 299) and three newly identified variable sites (37, 104 and 290). Our study, which is the first comprehensive analysis of RH1 evolution in a massive adaptive radiation of cichlid fishes, provides novel insights into the evolution of RH1 in a freshwater environment.
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Affiliation(s)
- Virginie Ricci
- Zoological Institute, Department of Environmental Sciences, University of Basel, Basel, Switzerland
| | - Fabrizia Ronco
- Zoological Institute, Department of Environmental Sciences, University of Basel, Basel, Switzerland
| | - Zuzana Musilova
- Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Walter Salzburger
- Zoological Institute, Department of Environmental Sciences, University of Basel, Basel, Switzerland
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8
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Pavlova NS, Gizatulina AR, Neretina TV, Smirnova OV. Expression of Opsin Genes in the Retina of Female and Male Three-Spined Sticklebacks Gasterosteus aculeatus L.: Effect of Freshwater Adaptation and Prolactin Administration. BIOCHEMISTRY. BIOKHIMIIA 2022; 87:215-224. [PMID: 35526850 DOI: 10.1134/s0006297922030038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Revised: 01/24/2022] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
Color vision sensitivity is crucial for fish adaptation during migration and reproduction. Prolactin and prolactin-like hormone are important regulators in both these processes. We hypothesized that prolactin influences the color vision sensitivity during freshwater migrations in fish. We studied the effects of prolactin and freshwater adaptation during the spawning period on the expression of opsin genes (SWS1, SWS2, RH2, LWS) in the retina of female and male three-spined sticklebacks Gasterosteus aculeatus L. Expression of the prolactin gene increased in the brain of females, but not males, while expression of the prolactin-like hormone decreased in the brain of both male and female sticklebacks during freshwater adaptation. Expression of the SWS2 gene decreased in the retina of females and males during freshwater adaptation and after prolactin administration. Expression of the SWS1 gene decreased in the retina of male sticklebacks after prolactin administration, but not during freshwater adaptation. Expression of the RH2 and LWS genes did not depend on prolactin administration in male and female sticklebacks. We conclude that expression of some opsin genes in the retina of sticklebacks is regulated by prolactin and depends on sex and freshwater adaptation. This expands our knowledge of the adaptive effects of prolactin on fish during freshwater migrations.
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Affiliation(s)
- Nadezhda S Pavlova
- Department of Human and Animal Physiology, Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia.
| | - Albina R Gizatulina
- Department of Physiology and General Pathology, Faculty of Fundamental Medicine, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Tatyana V Neretina
- Pertsov White Sea Biological Station, Moscow State University, 186671 Loukhsky District, Republic of Karelia, Russia
| | - Olga V Smirnova
- Department of Human and Animal Physiology, Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia
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9
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Musilova Z, Salzburger W, Cortesi F. The Visual Opsin Gene Repertoires of Teleost Fishes: Evolution, Ecology, and Function. Annu Rev Cell Dev Biol 2021; 37:441-468. [PMID: 34351785 DOI: 10.1146/annurev-cellbio-120219-024915] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Visual opsin genes expressed in the rod and cone photoreceptor cells of the retina are core components of the visual sensory system of vertebrates. Here, we provide an overview of the dynamic evolution of visual opsin genes in the most species-rich group of vertebrates, teleost fishes. The examination of the rich genomic resources now available for this group reveals that fish genomes contain more copies of visual opsin genes than are present in the genomes of amphibians, reptiles, birds, and mammals. The expansion of opsin genes in fishes is due primarily to a combination of ancestral and lineage-specific gene duplications. Following their duplication, the visual opsin genes of fishes repeatedly diversified at the same key spectral-tuning sites, generating arrays of visual pigments sensitive from the ultraviolet to the red spectrum of the light. Species-specific opsin gene repertoires correlate strongly with underwater light habitats, ecology, and color-based sexual selection. Expected final online publication date for the Annual Review of Cell and Developmental Biology, Volume 37 is October 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Zuzana Musilova
- Department of Zoology, Charles University, Prague 128 44, Czech Republic;
| | | | - Fabio Cortesi
- Queensland Brain Institute, The University of Queensland, Brisbane 4072, Queensland, Australia;
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Lloyd E, Chhouk B, Conith AJ, Keene AC, Albertson RC. Diversity in rest-activity patterns among Lake Malawi cichlid fishes suggests a novel axis of habitat partitioning. J Exp Biol 2021; 224:238727. [PMID: 33658242 PMCID: PMC8077532 DOI: 10.1242/jeb.242186] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 02/11/2021] [Indexed: 12/04/2022]
Abstract
Animals display remarkable diversity in rest and activity patterns that are regulated by endogenous foraging strategies, social behaviors and predator avoidance. Alteration in the circadian timing of activity or the duration of rest–wake cycles provide a central mechanism for animals to exploit novel niches. The diversity of the >3000 cichlid species throughout the world provides a unique opportunity to examine variation in locomotor activity and rest. Lake Malawi alone is home to over 500 species of cichlids that display divergent behaviors and inhabit well-defined niches throughout the lake. These species are presumed to be diurnal, though this has never been tested systematically. Here, we measured locomotor activity across the circadian cycle in 11 Lake Malawi cichlid species. We documented surprising variability in the circadian time of locomotor activity and the duration of rest. In particular, we identified a single species, Tropheops sp. ‘red cheek’, that is nocturnal. Nocturnal behavior was maintained when fish were provided shelter, but not under constant darkness, suggesting that it results from acute response to light rather than an endogenous circadian rhythm. Finally, we showed that nocturnality is associated with increased eye size after correcting for evolutionary history, suggesting a link between visual processing and nighttime activity. Together, these findings identify diversity of locomotor behavior in Lake Malawi cichlids and provide a system for investigating the molecular and neural basis underlying variation in nocturnal activity. Summary: Cichlids show a remarkable diversity in morphology and behavior. Cichlid species exhibit differences in strength and polarity of activity rhythms, revealing a new axis of habitat partitioning.
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Affiliation(s)
- Evan Lloyd
- Department of Biological Science, Florida Atlantic University, Jupiter, FL 33401, USA
| | - Brian Chhouk
- Department of Biology, University of Massachusetts, Amherst, MA 01003, USA
| | - Andrew J Conith
- Department of Biology, University of Massachusetts, Amherst, MA 01003, USA
| | - Alex C Keene
- Department of Biological Science, Florida Atlantic University, Jupiter, FL 33401, USA
| | - R Craig Albertson
- Department of Biology, University of Massachusetts, Amherst, MA 01003, USA
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11
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Nakamura H, Aibara M, Kajitani R, Mrosso HDJ, Mzighani SI, Toyoda A, Itoh T, Okada N, Nikaido M. Genomic Signatures for Species-Specific Adaptation in Lake Victoria Cichlids Derived from Large-Scale Standing Genetic Variation. Mol Biol Evol 2021; 38:3111-3125. [PMID: 33744961 PMCID: PMC8321545 DOI: 10.1093/molbev/msab084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The cichlids of Lake Victoria are a textbook example of adaptive radiation, as >500 endemic species arose in just 14,600 years. The degree of genetic differentiation among species is very low due to the short period of time after the radiation, which allows us to ascertain highly differentiated genes that are strong candidates for driving speciation and adaptation. Previous studies have revealed the critical contribution of vision to speciation by showing the existence of highly differentiated alleles in the visual opsin gene among species with different habitat depths. In contrast, the processes of species-specific adaptation to different ecological backgrounds remain to be investigated. Here, we used genome-wide comparative analyses of three species of Lake Victoria cichlids that inhabit different environments-Haplochromis chilotes, H. sauvagei, and Lithochromis rufus-to elucidate the processes of adaptation by estimating population history and by searching for candidate genes that contribute to adaptation. The patterns of changes in population size were quite distinct among the species according to their habitats. We identified many novel adaptive candidate genes, some of which had surprisingly long divergent haplotypes between species, thus showing the footprint of selective sweep events. Molecular phylogenetic analyses revealed that a large fraction of the allelic diversity among Lake Victoria cichlids was derived from standing genetic variation that originated before the adaptive radiation. Our analyses uncovered the processes of species-specific adaptation of Lake Victoria cichlids and the complexity of the genomic substrate that facilitated this adaptation.
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Affiliation(s)
- Haruna Nakamura
- School of Life Science and Technology, Tokyo Institute of Technology, Tokyo, Japan
| | - Mitsuto Aibara
- School of Life Science and Technology, Tokyo Institute of Technology, Tokyo, Japan
| | - Rei Kajitani
- School of Life Science and Technology, Tokyo Institute of Technology, Tokyo, Japan
| | - Hillary D J Mrosso
- Tanzania Fisheries Research Institute (TAFIRI), Mwanza Fisheries Research Center, Mwanza, Tanzania
| | - Semvua I Mzighani
- Tanzania Fisheries Research Institute (TAFIRI), Headquarters, Dar es Salaam, Tanzania.,Fisheries Education and Training Agency, Dar es Salaam, Tanzania
| | - Atsushi Toyoda
- Comparative Genomics Laboratory, National Institute of Genetics, Mishima, Shizuoka, Japan
| | - Takehiko Itoh
- School of Life Science and Technology, Tokyo Institute of Technology, Tokyo, Japan
| | - Norihiro Okada
- School of Pharmacy, Kitasato University, Kanagawa, Japan
| | - Masato Nikaido
- School of Life Science and Technology, Tokyo Institute of Technology, Tokyo, Japan
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12
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Corbo JC. Vitamin A 1/A 2 chromophore exchange: Its role in spectral tuning and visual plasticity. Dev Biol 2021; 475:145-155. [PMID: 33684435 DOI: 10.1016/j.ydbio.2021.03.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 03/01/2021] [Indexed: 01/20/2023]
Abstract
Vertebrate rod and cone photoreceptors detect light via a specialized organelle called the outer segment. This structure is packed with light-sensitive molecules known as visual pigments that consist of a G-protein-coupled, seven-transmembrane protein known as opsin, and a chromophore prosthetic group, either 11-cis retinal ('A1') or 11-cis 3,4-didehydroretinal ('A2'). The enzyme cyp27c1 converts A1 into A2 in the retinal pigment epithelium. Replacing A1 with A2 in a visual pigment red-shifts its spectral sensitivity and broadens its bandwidth of absorption at the expense of decreased photosensitivity and increased thermal noise. The use of vitamin A2-based visual pigments is strongly associated with the occupation of aquatic habitats in which the ambient light is red-shifted. By modulating the A1/A2 ratio in the retina, an organism can dynamically tune the spectral sensitivity of the visual system to better match the predominant wavelengths of light in its environment. As many as a quarter of all vertebrate species utilize A2, at least during a part of their life cycle or under certain environmental conditions. A2 utilization therefore represents an important and widespread mechanism of sensory plasticity. This review provides an up-to-date account of the A1/A2 chromophore exchange system.
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Affiliation(s)
- Joseph C Corbo
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, 63110, United States.
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13
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Casas L, Saenz-Agudelo P, Villegas-Ríos D, Irigoien X, Saborido-Rey F. Genomic landscape of geographically structured colour polymorphism in a temperate marine fish. Mol Ecol 2021; 30:1281-1296. [PMID: 33455028 PMCID: PMC7986630 DOI: 10.1111/mec.15805] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 01/06/2021] [Accepted: 01/08/2021] [Indexed: 12/14/2022]
Abstract
The study of phenotypic variation patterns among populations is fundamental to elucidate the drivers of evolutionary processes. Empirical evidence that supports ongoing genetic divergence associated with phenotypic variation remains very limited for marine species where larval dispersal is a common homogenizing force. We present a genome‐wide analysis of a marine fish, Labrus bergylta, comprising 144 samples distributed from Norway to Spain, a large geographical area that harbours a gradient of phenotypic differentiation. We analysed 39,602 biallelic single nucleotide polymorphisms and found a clear latitudinal gradient of genomic differentiation strongly correlated with the variation in phenotypic morph frequencies observed across the North Atlantic. We also detected a strong association between the latitude and the number of loci that appear to be under divergent selection, which increased with differences in coloration but not with overall genetic differentiation. Our results demonstrate that strong reproductive isolation is occurring between sympatric colour morphs of L. bergylta found at the southern areas and provide important new insights into the genomic changes shaping early stages of differentiation that might precede speciation with gene flow.
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Affiliation(s)
- Laura Casas
- Institute of Marine Research (IIM-CSIC), Vigo, Spain
| | - Pablo Saenz-Agudelo
- Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia, Chile
| | - David Villegas-Ríos
- Institute of Marine Research (IIM-CSIC), Vigo, Spain.,Instituto Mediterráneo de Estudios Avanzados (IMEDEA-CSIC-UiB), Esporles, Mallorca, Spain
| | - Xabier Irigoien
- AZTI - Marine Research, Herrera Kaia, Pasaia (Gipuzkoa), Spain.,IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
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14
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Simões BF, Gower DJ, Rasmussen AR, Sarker MAR, Fry GC, Casewell NR, Harrison RA, Hart NS, Partridge JC, Hunt DM, Chang BS, Pisani D, Sanders KL. Spectral Diversification and Trans-Species Allelic Polymorphism during the Land-to-Sea Transition in Snakes. Curr Biol 2020; 30:2608-2615.e4. [PMID: 32470360 DOI: 10.1016/j.cub.2020.04.061] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 03/05/2020] [Accepted: 04/23/2020] [Indexed: 11/16/2022]
Abstract
Snakes are descended from highly visual lizards [1] but have limited (probably dichromatic) color vision attributed to a dim-light lifestyle of early snakes [2-4]. The living species of front-fanged elapids, however, are ecologically very diverse, with ∼300 terrestrial species (cobras, taipans, etc.) and ∼60 fully marine sea snakes, plus eight independently marine, amphibious sea kraits [1]. Here, we investigate the evolution of spectral sensitivity in elapids by analyzing their opsin genes (which are responsible for sensitivity to UV and visible light), retinal photoreceptors, and ocular lenses. We found that sea snakes underwent rapid adaptive diversification of their visual pigments when compared with their terrestrial and amphibious relatives. The three opsins present in snakes (SWS1, LWS, and RH1) have evolved under positive selection in elapids, and in sea snakes they have undergone multiple shifts in spectral sensitivity toward the longer wavelengths that dominate below the sea surface. Several relatively distantly related Hydrophis sea snakes are polymorphic for shortwave sensitive visual pigment encoded by alleles of SWS1. This spectral site polymorphism is expected to confer expanded "UV-blue" spectral sensitivity and is estimated to have persisted twice as long as the predicted survival time for selectively neutral nuclear alleles. We suggest that this polymorphism is adaptively maintained across Hydrophis species via balancing selection, similarly to the LWS polymorphism that confers allelic trichromacy in some primates. Diving sea snakes thus appear to share parallel mechanisms of color vision diversification with fruit-eating primates.
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Affiliation(s)
- Bruno F Simões
- University of Plymouth, School of Biological and Marine Sciences, Drake Circus, Plymouth PL4 8AA, United Kingdom; University of Bristol, School of Biological Sciences and School of Earth Sciences, Tyndall Avenue, Bristol BS8 1TG, United Kingdom; The University of Adelaide, School of Biological Sciences, North Terrace, Adelaide, South Australia 5005, Australia.
| | - David J Gower
- Department of Life Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom
| | - Arne R Rasmussen
- The Royal Danish Academy of Fine Arts, School of Architecture, Design and Conservation, Philip de Langes Allé, 1435 Copenhagen K, Denmark
| | - Mohammad A R Sarker
- University of Dhaka, Department of Zoology, Curzon Hall Campus, Dhaka 1000, Bangladesh
| | - Gary C Fry
- CSIRO Oceans and Atmosphere, Queensland Biosciences Precinct, St Lucia, Queensland 4072, Australia
| | - Nicholas R Casewell
- Liverpool School of Tropical Medicine, Centre for Snakebite Research & Interventions, Pembroke Place, Liverpool L3 5QA, United Kingdom
| | - Robert A Harrison
- Liverpool School of Tropical Medicine, Centre for Snakebite Research & Interventions, Pembroke Place, Liverpool L3 5QA, United Kingdom
| | - Nathan S Hart
- Macquarie University, Department of Biological Sciences, North Ryde, Sydney, New South Wales 2109, Australia
| | - Julian C Partridge
- The University of Western Australia, Oceans Institute, Crawley, Perth, Western Australia 6009, Australia
| | - David M Hunt
- The University of Western Australia, School of Biological Sciences, Crawley, Perth, Western Australia 6009, Australia; The Lions Eye Institute, Centre for Ophthalmology and Visual Science, Nedlands, Perth, Western Australia 6009, Australia
| | - Belinda S Chang
- University of Toronto, Departments of Ecology & Evolutionary, Cell & Systems Biology, Willcocks Street, Toronto M5S 3G5, Canada
| | - Davide Pisani
- University of Bristol, School of Biological Sciences and School of Earth Sciences, Tyndall Avenue, Bristol BS8 1TG, United Kingdom
| | - Kate L Sanders
- The University of Adelaide, School of Biological Sciences, North Terrace, Adelaide, South Australia 5005, Australia; Department of Life Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom
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15
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Escobar-Camacho D, Carleton KL, Narain DW, Pierotti MER. Visual pigment evolution in Characiformes: The dynamic interplay of teleost whole-genome duplication, surviving opsins and spectral tuning. Mol Ecol 2020; 29:2234-2253. [PMID: 32421918 DOI: 10.1111/mec.15474] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 05/09/2020] [Accepted: 05/11/2020] [Indexed: 01/06/2023]
Abstract
Vision represents an excellent model for studying adaptation, given the genotype-to-phenotype map that has been characterized in a number of taxa. Fish possess a diverse range of visual sensitivities and adaptations to underwater light, making them an excellent group to study visual system evolution. In particular, some speciose but understudied lineages can provide a unique opportunity to better understand aspects of visual system evolution such as opsin gene duplication and neofunctionalization. In this study, we showcase the visual system evolution of neotropical Characiformes and the spectral tuning mechanisms they exhibit to modulate their visual sensitivities. Such mechanisms include gene duplications and losses, gene conversion, opsin amino acid sequence and expression variation, and A1 /A2 -chromophore shifts. The Characiforms we studied utilize three cone opsin classes (SWS2, RH2, LWS) and a rod opsin (RH1). However, the characiform's entire opsin gene repertoire is a product of dynamic evolution by opsin gene loss (SWS1, RH2) and duplication (LWS, RH1). The LWS- and RH1-duplicates originated from a teleost specific whole-genome duplication as well as characiform-specific duplication events. Both LWS-opsins exhibit gene conversion and, through substitutions in key tuning sites, one of the LWS-paralogues has acquired spectral sensitivity to green light. These sequence changes suggest reversion and parallel evolution of key tuning sites. Furthermore, characiforms' colour vision is based on the expression of both LWS-paralogues and SWS2. Finally, we found interspecific and intraspecific variation in A1 /A2 -chromophores proportions, correlating with the light environment. These multiple mechanisms may be a result of the diverse visual environments where Characiformes have evolved.
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Affiliation(s)
| | - Karen L Carleton
- Department of Biology, University of Maryland, College Park, MD, USA
| | - Devika W Narain
- Environmental Sciences, Anton de Kom University of Suriname, Paramaribo, Suriname
| | - Michele E R Pierotti
- Naos Marine Laboratories, Smithsonian Tropical Research Institute, Panama, Republic of Panama
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16
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Carleton KL, Yourick MR. Axes of visual adaptation in the ecologically diverse family Cichlidae. Semin Cell Dev Biol 2020; 106:43-52. [PMID: 32439270 DOI: 10.1016/j.semcdb.2020.04.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 04/21/2020] [Accepted: 04/21/2020] [Indexed: 02/07/2023]
Abstract
The family Cichlidae contains approximately 2000 species that live in diverse freshwater habitats including murky lakes, turbid rivers, and clear lakes from both the Old and New Worlds. Their visual systems are similarly diverse and have evolved specific sensitivities that differ along several axes of variation. Variation in cornea and lens transmission affect which wavelengths reach the retina. Variation in photoreceptor number and distribution affect brightness sensitivity, spectral sensitivity and resolution. Probably their most dynamic characteristic is the variation in visual pigment peak sensitivities. Visual pigments can be altered through changes in chromophore, opsin sequence and opsin expression. Opsin expression varies by altering which of the seven available cone opsins in their genomes are turned on. These opsins can even be coexpressed to produce seemingly infinitely tunable cone sensitivities. Both chromophore and opsin expression can vary on either rapid (hours or days), slower (seasonal or ontogenetic) or evolutionary timescales. Such visual system shifts have enabled cichlids to adapt to different habitats and foraging styles. Through both short term plasticity and longer evolutionary adaptations, cichlids have proven to be ecologically successful and an excellent model for studying organismal adaptation.
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Affiliation(s)
- Karen L Carleton
- Department of Biology, University of Maryland, College Park, MD, 20742, USA.
| | - Miranda R Yourick
- Department of Biology, University of Maryland, College Park, MD, 20742, USA
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17
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Carleton KL, Escobar-Camacho D, Stieb SM, Cortesi F, Marshall NJ. Seeing the rainbow: mechanisms underlying spectral sensitivity in teleost fishes. J Exp Biol 2020; 223:jeb193334. [PMID: 32327561 PMCID: PMC7188444 DOI: 10.1242/jeb.193334] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Among vertebrates, teleost eye diversity exceeds that found in all other groups. Their spectral sensitivities range from ultraviolet to red, and the number of visual pigments varies from 1 to over 40. This variation is correlated with the different ecologies and life histories of fish species, including their variable aquatic habitats: murky lakes, clear oceans, deep seas and turbulent rivers. These ecotopes often change with the season, but fish may also migrate between ecotopes diurnally, seasonally or ontogenetically. To survive in these variable light habitats, fish visual systems have evolved a suite of mechanisms that modulate spectral sensitivities on a range of timescales. These mechanisms include: (1) optical media that filter light, (2) variations in photoreceptor type and size to vary absorbance and sensitivity, and (3) changes in photoreceptor visual pigments to optimize peak sensitivity. The visual pigment changes can result from changes in chromophore or changes to the opsin. Opsin variation results from changes in opsin sequence, opsin expression or co-expression, and opsin gene duplications and losses. Here, we review visual diversity in a number of teleost groups where the structural and molecular mechanisms underlying their spectral sensitivities have been relatively well determined. Although we document considerable variability, this alone does not imply functional difference per se. We therefore highlight the need for more studies that examine species with known sensitivity differences, emphasizing behavioral experiments to test whether such differences actually matter in the execution of visual tasks that are relevant to the fish.
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Affiliation(s)
- Karen L Carleton
- Department of Biology, University of Maryland, College Park, MD 20742, USA
| | | | - Sara M Stieb
- Centre of Ecology, Evolution and Biogeochemistry, EAWAG Swiss Federal Institute of Aquatic Science and Technology, 6047 Kastanienbaum, Switzerland
- Institute of Ecology and Evolution, University of Bern, 3012 Bern, Switzerland
- Queensland Brain Institute, University of Queensland, Brisbane 4072 QLD, Australia
| | - Fabio Cortesi
- Queensland Brain Institute, University of Queensland, Brisbane 4072 QLD, Australia
| | - N Justin Marshall
- Queensland Brain Institute, University of Queensland, Brisbane 4072 QLD, Australia
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18
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Luehrmann M, Carleton KL, Cortesi F, Cheney KL, Marshall NJ. Cardinalfishes (Apogonidae) show visual system adaptations typical of nocturnally and diurnally active fish. Mol Ecol 2019; 28:3025-3041. [DOI: 10.1111/mec.15102] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Revised: 03/20/2019] [Accepted: 03/25/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Martin Luehrmann
- Sensory Neurobiology Group, Queensland Brain Institute The University of Queensland Brisbane Queensland Australia
| | | | - Fabio Cortesi
- Sensory Neurobiology Group, Queensland Brain Institute The University of Queensland Brisbane Queensland Australia
| | - Karen L. Cheney
- Sensory Neurobiology Group, Queensland Brain Institute The University of Queensland Brisbane Queensland Australia
- School of Biological Sciences The University of Queensland Brisbane Queensland Australia
| | - N. Justin Marshall
- Sensory Neurobiology Group, Queensland Brain Institute The University of Queensland Brisbane Queensland Australia
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19
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Takuno S, Miyagi R, Onami JI, Takahashi-Kariyazono S, Sato A, Tichy H, Nikaido M, Aibara M, Mizoiri S, Mrosso HDJ, Mzighani SI, Okada N, Terai Y. Patterns of genomic differentiation between two Lake Victoria cichlid species, Haplochromis pyrrhocephalus and H. sp. 'macula'. BMC Evol Biol 2019; 19:68. [PMID: 30832572 PMCID: PMC6399900 DOI: 10.1186/s12862-019-1387-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 02/12/2019] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND The molecular basis of the incipient stage of speciation is still poorly understood. Cichlid fish species in Lake Victoria are a prime example of recent speciation events and a suitable system to study the adaptation and reproductive isolation of species. RESULTS Here, we report the pattern of genomic differentiation between two Lake Victoria cichlid species collected in sympatry, Haplochromis pyrrhocephalus and H. sp. 'macula,' based on the pooled genome sequences of 20 individuals of each species. Despite their ecological differences, population genomics analyses demonstrate that the two species are very close to a single panmictic population due to extensive gene flow. However, we identified 21 highly differentiated short genomic regions with fixed nucleotide differences. At least 15 of these regions contained genes with predicted roles in adaptation and reproductive isolation, such as visual adaptation, circadian clock, developmental processes, adaptation to hypoxia, and sexual selection. The nonsynonymous fixed differences in one of these genes, LWS, were reported as substitutions causing shift in absorption spectra of LWS pigments. Fixed differences were found in the promoter regions of four other differentially expressed genes, indicating that these substitutions may alter gene expression levels. CONCLUSIONS These diverged short genomic regions may have contributed to the differentiation of two ecologically different species. Moreover, the origins of adaptive variants within the differentiated regions predate the geological formation of Lake Victoria; thus Lake Victoria cichlid species diversified via selection on standing genetic variation.
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Affiliation(s)
- Shohei Takuno
- Department of Evolutionary Studies of Biosystems, SOKENDAI (The Graduate University for Advanced Studies), Shonan Village, Hayama, Kanagawa, 240-0193 Japan
| | - Ryutaro Miyagi
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501 Japan
- Department of Biological sciences, Tokyo Metropolitan University, 1-1 Minamiosawa, Hachioji, Tokyo, 197-0397 Japan
| | - Jun-ichi Onami
- JST (Japan Science and Technology Agency), NBDC (National Bioscience Database Center), 5-3, Yonbancho, Chiyoda-ku, Tokyo, 102-0081 Japan
| | - Shiho Takahashi-Kariyazono
- Department of Evolutionary Studies of Biosystems, SOKENDAI (The Graduate University for Advanced Studies), Shonan Village, Hayama, Kanagawa, 240-0193 Japan
| | - Akie Sato
- Department of Anatomy and Cytohistology, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, 230-8501 Japan
| | - Herbert Tichy
- Max-Planck-Institut für Biologie, Abteilung Immungenetik, Corrensstrasse 42, D-72076 Tübingen, Germany
| | - Masato Nikaido
- School of Life Science and Technology, Department of Life Science and Technology, Tokyo Institute of Technology (Tokyo Tech), 2-12-1, Ookayama, Meguro ward, Tokyo, Japan
| | - Mitsuto Aibara
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501 Japan
| | - Shinji Mizoiri
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501 Japan
| | | | - Semvua I. Mzighani
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501 Japan
- Tanzania Fisheries Research Institute (TAFIRI), Mwanza, Tanzania
| | - Norihiro Okada
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501 Japan
- Department of Life Sciences, National Cheng Kung University, 701 Tainan, Taiwan
- Foundation for Advancement of International Science (FAIS), Tsukuba, Japan
| | - Yohey Terai
- Department of Evolutionary Studies of Biosystems, SOKENDAI (The Graduate University for Advanced Studies), Shonan Village, Hayama, Kanagawa, 240-0193 Japan
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501 Japan
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20
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Sandkam B, Dalton B, Breden F, Carleton K. Reviewing guppy color vision: integrating the molecular and physiological variation in visual tuning of a classic system for sensory drive. Curr Zool 2018; 64:535-545. [PMID: 30108634 PMCID: PMC6084590 DOI: 10.1093/cz/zoy047] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 06/02/2018] [Indexed: 12/11/2022] Open
Abstract
Sensory drive predicts coevolution of mate choice signals with the sensory systems detecting those signals. Guppies are a classic model for sensory drive as mate preferences based on coloration differ across individuals and populations. A large body of work has identified variation in color vision, yet we lack a direct tie between how such variation in color vision influences variation in color preference. Here we bring together studies that have investigated guppy vision over the past 40 years to: (1) highlight our current understanding of where variation occurs in the guppy color vision pathway and (2) suggest future avenues of research into sources of visual system variation that could influence guppy color preference. This will allow researchers to design careful studies that couple measures of color preference with measures of visual system variation from the same individual or population. Such studies will finally provide important answers as to what sets the direction and speed of mate preference evolution via sensory drive.
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Affiliation(s)
- Benjamin Sandkam
- Department of Biology, University of Maryland, College Park, College Park, MD, USA
| | - Brian Dalton
- Department of Biology, University of Maryland, College Park, College Park, MD, USA
| | - Felix Breden
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - Karen Carleton
- Department of Biology, University of Maryland, College Park, College Park, MD, USA
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