Adaptation of pelage color and pigment variations in Israeli subterranean blind mole rats, Spalax ehrenbergi [corrected]

Concealing coloration in rodents is well established. However, only a few studies examined how soil color, pelage color, hair-melanin content, and genetics (i.e., the causal chain) synergize to configure it. This study investigates the causal chain of dorsal coloration in Israeli subterranean blind...

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Veröffentlicht in:PloS one 2013-07, Vol.8 (7), p.e69346-e69346
Hauptverfasser: Singaravelan, Natarajan, Raz, Shmuel, Tzur, Shay, Belifante, Shirli, Pavlicek, Tomas, Beiles, Avigdor, Ito, Shosuke, Wakamatsu, Kazumasa, Nevo, Eviatar
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container_title PloS one
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creator Singaravelan, Natarajan
Raz, Shmuel
Tzur, Shay
Belifante, Shirli
Pavlicek, Tomas
Beiles, Avigdor
Ito, Shosuke
Wakamatsu, Kazumasa
Nevo, Eviatar
description Concealing coloration in rodents is well established. However, only a few studies examined how soil color, pelage color, hair-melanin content, and genetics (i.e., the causal chain) synergize to configure it. This study investigates the causal chain of dorsal coloration in Israeli subterranean blind mole rats, Spalax ehrenbergi. We examined pelage coloration of 128 adult animals from 11 populations belonging to four species of Spalax ehrenbergi superspecies (Spalax galili, Spalax golani, Spalax carmeli, and Spalax judaei) and the corresponding coloration of soil samples from the collection sites using a digital colorimeter. Additionally, we quantified hair-melanin contents of 67 animals using HPLC and sequenced the MC1R gene in 68 individuals from all four mole rat species. Due to high variability of soil colors, the correlation between soil and pelage color coordinates was weak and significant only between soil hue and pelage lightness. Multiple stepwise forward regression revealed that soil lightness was significantly associated with all pelage color variables. Pelage color lightness among the four species increased with the higher southward aridity in accordance to Gloger's rule (darker in humid habitats and lighter in arid habitats). Darker and lighter pelage colors are associated with darker basalt and terra rossa, and lighter rendzina soils, respectively. Despite soil lightness varying significantly, pelage lightness and eumelanin converged among populations living in similar soil types. Partial sequencing of the MC1R gene identified three allelic variants, two of which were predominant in northern species (S. galili and S. golani), and the third was exclusive to southern species (S. carmeli and S. judaei), which might have caused the differences found in pheomelanin/eumelanin ratio. Darker dorsal pelage in darker basalt and terra rossa soils in the north and lighter pelage in rendzina and loess soils in the south reflect the combined results of crypsis and thermoregulatory function following Gloger's rule.
doi_str_mv 10.1371/journal.pone.0069346
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However, only a few studies examined how soil color, pelage color, hair-melanin content, and genetics (i.e., the causal chain) synergize to configure it. This study investigates the causal chain of dorsal coloration in Israeli subterranean blind mole rats, Spalax ehrenbergi. We examined pelage coloration of 128 adult animals from 11 populations belonging to four species of Spalax ehrenbergi superspecies (Spalax galili, Spalax golani, Spalax carmeli, and Spalax judaei) and the corresponding coloration of soil samples from the collection sites using a digital colorimeter. Additionally, we quantified hair-melanin contents of 67 animals using HPLC and sequenced the MC1R gene in 68 individuals from all four mole rat species. Due to high variability of soil colors, the correlation between soil and pelage color coordinates was weak and significant only between soil hue and pelage lightness. 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However, only a few studies examined how soil color, pelage color, hair-melanin content, and genetics (i.e., the causal chain) synergize to configure it. This study investigates the causal chain of dorsal coloration in Israeli subterranean blind mole rats, Spalax ehrenbergi. We examined pelage coloration of 128 adult animals from 11 populations belonging to four species of Spalax ehrenbergi superspecies (Spalax galili, Spalax golani, Spalax carmeli, and Spalax judaei) and the corresponding coloration of soil samples from the collection sites using a digital colorimeter. Additionally, we quantified hair-melanin contents of 67 animals using HPLC and sequenced the MC1R gene in 68 individuals from all four mole rat species. Due to high variability of soil colors, the correlation between soil and pelage color coordinates was weak and significant only between soil hue and pelage lightness. 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Academic</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>PloS one</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Singaravelan, Natarajan</au><au>Raz, Shmuel</au><au>Tzur, Shay</au><au>Belifante, Shirli</au><au>Pavlicek, Tomas</au><au>Beiles, Avigdor</au><au>Ito, Shosuke</au><au>Wakamatsu, Kazumasa</au><au>Nevo, Eviatar</au><au>Roulin, Alexandre</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Adaptation of pelage color and pigment variations in Israeli subterranean blind mole rats, Spalax ehrenbergi [corrected]</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2013-07-25</date><risdate>2013</risdate><volume>8</volume><issue>7</issue><spage>e69346</spage><epage>e69346</epage><pages>e69346-e69346</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>Concealing coloration in rodents is well established. However, only a few studies examined how soil color, pelage color, hair-melanin content, and genetics (i.e., the causal chain) synergize to configure it. This study investigates the causal chain of dorsal coloration in Israeli subterranean blind mole rats, Spalax ehrenbergi. We examined pelage coloration of 128 adult animals from 11 populations belonging to four species of Spalax ehrenbergi superspecies (Spalax galili, Spalax golani, Spalax carmeli, and Spalax judaei) and the corresponding coloration of soil samples from the collection sites using a digital colorimeter. Additionally, we quantified hair-melanin contents of 67 animals using HPLC and sequenced the MC1R gene in 68 individuals from all four mole rat species. Due to high variability of soil colors, the correlation between soil and pelage color coordinates was weak and significant only between soil hue and pelage lightness. Multiple stepwise forward regression revealed that soil lightness was significantly associated with all pelage color variables. Pelage color lightness among the four species increased with the higher southward aridity in accordance to Gloger's rule (darker in humid habitats and lighter in arid habitats). Darker and lighter pelage colors are associated with darker basalt and terra rossa, and lighter rendzina soils, respectively. Despite soil lightness varying significantly, pelage lightness and eumelanin converged among populations living in similar soil types. Partial sequencing of the MC1R gene identified three allelic variants, two of which were predominant in northern species (S. galili and S. golani), and the third was exclusive to southern species (S. carmeli and S. judaei), which might have caused the differences found in pheomelanin/eumelanin ratio. Darker dorsal pelage in darker basalt and terra rossa soils in the north and lighter pelage in rendzina and loess soils in the south reflect the combined results of crypsis and thermoregulatory function following Gloger's rule.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>23935991</pmid><doi>10.1371/journal.pone.0069346</doi><tpages>e69346</tpages><oa>free_for_read</oa></addata></record>
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identifier ISSN: 1932-6203
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1932-6203
language eng
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subjects Adaptation
Adaptation, Physiological - genetics
Agriculture
Analytical chemistry
Animals
Aridity
Basalt
Biology
Chains
Color
Coloration
Colorimetry
Crypsis
Evolution
Female
Free radicals
Gene Expression
Gene sequencing
Gene-Environment Interaction
Genetic Variation
Genetics
Geomyidae
Geomys bursarius
Habitats
Hair
Health sciences
High-performance liquid chromatography
Israel
Liquid chromatography
Loess
Male
MC1R gene
Melanin
Melanins - biosynthesis
Melanins - genetics
Melanoma
Pelage
Pheomelanin
Pigments, Biological - genetics
Pigments, Biological - metabolism
Populations
Predation
Receptor, Melanocortin, Type 1 - genetics
Receptor, Melanocortin, Type 1 - metabolism
Rodents
Soil - chemistry
Soil types
Spalax
Spalax - genetics
Spalax - metabolism
Species
Studies
Synergism
title Adaptation of pelage color and pigment variations in Israeli subterranean blind mole rats, Spalax ehrenbergi [corrected]
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