Physiological Correlates of Differential Dehydration Tolerance in Anuran Amphibians

Copeia ◽  
1980 ◽  
Vol 1980 (1) ◽  
pp. 125 ◽  
Author(s):  
Stanley S. Hillman
Keyword(s):  
Dehydration Tolerance ◽  
Anuran Amphibians

scholarly journals Independent pseudogenizations and losses of sox15 during amniote diversification following asymmetric ohnolog evolution

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Yusaku Ogita ◽  
Kei Tamura ◽  
Shuuji Mawaribuchi ◽  
Nobuhiko Takamatsu ◽  
Michihiko Ito
Keyword(s):  
Sequence Similarity ◽  
The Other ◽  
Vertebrate Evolution ◽  
Skeletal Muscle Regeneration ◽  
Cns Development ◽  
Placental Development ◽  
Relaxed Selection ◽  
Significant Sequence Similarity ◽  
Anuran Amphibians ◽  
Divergent Gene

Abstract Background Four ohnologous genes (sox1, sox2, sox3, and sox15) were generated by two rounds of whole-genome duplication in a vertebrate ancestor. In eutherian mammals, Sox1, Sox2, and Sox3 participate in central nervous system (CNS) development. Sox15 has a function in skeletal muscle regeneration and has little functional overlap with the other three ohnologs. In contrast, the frog Xenopus laevis and zebrafish orthologs of sox15 as well as sox1-3 function in CNS development. We previously reported that Sox15 is involved in mouse placental development as neofunctionalization, but is pseudogenized in the marsupial opossum. These findings suggest that sox15 might have evolved with divergent gene fates during vertebrate evolution. However, knowledge concerning sox15 in other vertebrate lineages than therian mammals, anuran amphibians, and teleost fish is scarce. Our purpose in this study was to clarify the fate and molecular evolution of sox15 during vertebrate evolution. Results We searched for sox15 orthologs in all vertebrate classes from agnathans to mammals by significant sequence similarity and synteny analyses using vertebrate genome databases. Interestingly, sox15 was independently pseudogenized at least twice during diversification of the marsupial mammals. Moreover, we observed independent gene loss of sox15 at least twice during reptile evolution in squamates and crocodile-bird diversification. Codon-based phylogenetic tree and selective analyses revealed an increased dN/dS ratio for sox15 compared to the other three ohnologs during jawed vertebrate evolution. Conclusions The findings revealed an asymmetric evolution of sox15 among the four ohnologs during vertebrate evolution, which was supported by the increased dN/dS values in cartilaginous fishes, anuran amphibians, and amniotes. The increased dN/dS value of sox15 may have been caused mainly by relaxed selection. Notably, independent pseudogenizations and losses of sox15 were observed during marsupial and reptile evolution, respectively. Both might have been caused by strong relaxed selection. The drastic gene fates of sox15, including neofunctionalization and pseudogenizations/losses during amniote diversification, might be caused by a release from evolutionary constraints.

scholarly journals Correction to: Eye‐body allometry across biphasic ontogeny in anuran amphibians

2021 ◽  
Author(s):  
Samuel J. Shrimpton ◽  
Jeffrey W. Streicher ◽  
David J. Gower ◽  
Rayna C. Bell ◽  
Matthew K. Fujita ◽  
...  
Keyword(s):  
Anuran Amphibians

A correction to this paper has been published: https://doi.org/10.1007/s10682-021-10109-w

scholarly journals Slow desiccation improves dehydration tolerance and accumulation of compatible osmolytes in earthworm cocoons (Dendrobaena octaedra Savigny)

2008 ◽  
Vol 211 (12) ◽  
pp. 1903-1910 ◽  
Author(s):  
C. R. Petersen ◽  
M. Holmstrup ◽  
A. Malmendal ◽  
M. Bayley ◽  
J. Overgaard
Keyword(s):  
Dehydration Tolerance ◽  
Dendrobaena Octaedra ◽  
Compatible Osmolytes

The jugular body in anuran amphibians: Role in immunity

1981 ◽  
Vol 5 ◽  
pp. 129-135 ◽  
Author(s):  
A. Zapata ◽  
A. Villena ◽  
B. Razquin ◽  
E.L. Cooper
Keyword(s):  
Anuran Amphibians

scholarly journals Amphibia, Anura, Parque Natural Municipal da Taquara, municipality of Duque de Caxias, state of Rio de Janeiro, southeastern Brazil

Check List ◽  
2009 ◽  
Vol 5 (4) ◽  
pp. 840 ◽  
Author(s):  
Rodrigo De Oliveira Lula Salles ◽  
Luiz Norberto Weber ◽  
Thiago Silva-Soares
Keyword(s):  
Rio De Janeiro ◽  
Atlantic Rainforest ◽  
Southeastern Brazil ◽  
Conservation Area ◽  
Anuran Amphibians ◽  
Amphibian Communities

Herein is presented a list of the amphibians from the Parque Natural Municipal da Taquara (22°35'S, 43°14'W), an area of Atlantic Rainforest at municipality of Duque de Caxias, state of Rio de Janeiro, southeastern Brazil. The work was carried out from September 2006 to October 2008. Expeditions were made three times a week during the day, and once a month at night. We recorded 50 species of anuran amphibians distributed in 13 families: Amphignathodontidae (1 species), Brachycephalidae (2), Bufonidae (2), Centrolenidae (1), Craugastoridae (1), Cycloramphidae (3), Hylidae (29), Hylodidae (3), Leiuperidae (1), Leptodactylidae (4), Microhylidae (1), Strabomantidae (1), and Ranidae (1). Some species had their range extended. The present study demonstrates that the Parque Natural Municipal da Taquara is a conservation area of huge importance to the preservation of the amphibian communities that inhabit this Atlantic Rainforest lowland environment.

Scaling of Jumping Performance in Anuran Amphibians

2000 ◽  
Vol 34 (2) ◽  
pp. 222 ◽  
Author(s):  
In-Ho Choi ◽  
Jae Han Shim ◽  
Youn Sun Lee ◽  
Robert E. Ricklefs
Keyword(s):  
Jumping Performance ◽  
Anuran Amphibians

scholarly journals Anuran amphibians' diversity in a northwestern area of the Brazilian Pantanal

2011 ◽  
Vol 11 (4) ◽  
pp. 77-86 ◽  
Author(s):  
André Pansonato ◽  
Tamí Mott ◽  
Christine Strüssmann
Keyword(s):  
Field Trips ◽  
Water Bodies ◽  
Aquatic Habitats ◽  
Mato Grosso ◽  
Anuran Amphibians ◽  
Flooded Area ◽  
Species Richness And Abundance ◽  
Seasonally Flooded ◽  
Brazilian Pantanal ◽  
Northwestern Area

In the Pantanal, the largest continuous floodplain in the world, the diversity and distribution of anuran amphibians vary in and across distinct subregions and distinct habitats occurring along inundation gradients. Permanent and natural aquatic habitats are relatively scarce in the Pantanal, and occurrence of temporary aquatic habitats varies seasonally, depending on rains. We here present results of evaluations of anuran's species richness and abundance in a seasonally flooded area in the northwestern section of the Pantanal (Fazenda Baía de Pedra, Cáceres municipality, state of Mato Grosso, Brazil), comparing values obtained in 10 plots systematically distributed over 5 km² with those obtained in additional aquatic plots in the study area. Data were obtained in five field trips, from February 2008 to March 2009. In addition to the plots, 36 water bodies (20 permanent and 16 temporary) were also sampled for the presence of anurans. In total, 3,983 individuals from 34 anuran species distributed in five families were recorded: Hylidae (14 species), Leptodactylidae (8), Leiuperidae (6), Microhylidae (4), and Bufonidae (2). Local richness represents 77.3% of the anuran diversity already recorded for the Brazilian Pantanal. The number of species recorded exclusively in systematically distributed terrestrial plots and in water bodies was 28 and 32, respectively. Sampling methods used at Fazenda Baía da Pedra were efficient in determining anuran richness, abundance, composition and distribution. Evaluations of anuran richness and abundance by using permanent sampling plots in the Pantanal may benefit from additional sampling sites, particularly permanent and temporary water bodies.

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