Results 71 to 80 of about 17,678 (274)

Habitat light sets the boundaries for the rapid evolution of cichlid fish vision, while sexual selection can tune it within those limits

Molecular Ecology, 2020
Cichlid fishes' famous diversity in body coloration is accompanied by a highly diverse and complex visual system. Although cichlids possess an unusually high number of seven cone opsin genes, they express only a subset of these during their ontogeny ...
Ralph F. Schneider, Sina J. Rometsch, Julián Torres‐Dowdall, A. Meyer   +3 more
semanticscholar   +1 more source

The effect of social context and learning on aggression biases: consequences for the role of male-male competition in speciation and a field study in cichlid fish

Frontiers in Ecology and Evolution
Male-male competition and female-female competition can play important roles in the origin and maintenance of phenotypic polymorphism and speciation. If territory owners bias aggression towards others of their own phenotype, rare male phenotypes will be ...
Peter D. Dijkstra, Peter D. Dijkstra, Peter D. Dijkstra, Ole Seehausen, Ole Seehausen   +4 more
doaj   +1 more source

Early stages of sympatric homoploid hybrid speciation in crater lake cichlid fishes

Nature Communications, 2022
Here, the authors present a rare example of sympatric homoploid hybrid speciation, without ploidy changes, in the Midas cichlid fishes from Nicaragua. Midas cichlid hybrids occupy a different ecological niche, likely facilitated by body shape adaptations.
Melisa Olave, Alexander Nater, Andreas F. Kautt, Axel Meyer   +3 more
doaj   +1 more source

Molecular clocks, biogeography and species diversity in Herichthys with evaluation of the role of Punta del Morro as a vicariant brake along the Mexican Transition Zone in the context of local and global time frame of cichlid diversification [PDF]

PeerJ, 2020
Using molecular dated phylogenies and biogeographic reconstructions, the species diversity, biogeography and time frame of evolution of the genus Herichthys were evaluated.
Fabian Pérez-Miranda, Omar Mejia, Benjamín López, Oldřich Říčan   +3 more
doaj   +2 more sources

Functional morphology of the pharyngeal teeth of the ocean sunfish, Mola mola

The Anatomical Record, EarlyView.
Abstract Many fish use a set of pharyngeal jaws in their throat to aid in prey capture and processing, particularly of large or complex prey. In this study—combining dissection, CT scanning, histology, and performance testing—we demonstrate a novel use of pharyngeal teeth in the ocean sunfish (Mola mola), a species for which pharyngeal jaw anatomy had ...
Benjamin Flaum, Michael J. Blumer, Mason N. Dean, Laura J. Ekstrom   +3 more
wiley   +1 more source

Temporal diversification of Central American cichlids [PDF]

BMC Evolutionary Biology, 2010
Cichlid fishes are classic examples of adaptive radiation because of their putative tendency to explosively diversify after invading novel environments. To examine whether ecological opportunity increased diversification (speciation minus extinction) early in a species-rich cichlid radiation, we determined if Heroine cichlids experienced a burst of ...
Phillip R. Hollingsworth, C. Darrin Hulsey, James A. Fordyce   +2 more
openaire   +4 more sources

Cichlid Evolution: Lessons in Diversification 2012 [PDF]

International Journal of Evolutionary Biology, 2012
This is the second special issue on cichlid evolution hosted by the International Journal of Evolutionary Biology. Once more, we are overwhelmed by the vivid responses to our call for contributions, and thank the authors for their great work. The thirteen papers in this issue, including two reviews, span geographically from Africa to South America and ...
Koblmuller, Stephan, Albertson, R Craig, Genner, Martin J, Sefc, Kristina M, Takahashi, Tetsumi   +4 more
openaire   +4 more sources

Land Cover, Land Use, and Climate Change Impacts on Endemic Cichlid Habitats in Northern Tanzania

Remote Sensing, 2017
Freshwater ecosystems are among the most threatened on Earth, facing environmental and anthropogenic pressures often surpassing their terrestrial counterparts. Land use and land cover change (LUCC) such as degradation and fragmentation of the terrestrial
Margaret Kalacska, J. Pablo Arroyo-Mora, Oliver Lucanus, Mary A. Kishe-Machumu   +3 more
doaj   +1 more source

Implementing Large Genomic SNP Datasets in Phylogenetic Network Reconstructions: A Case Study of Particularly Rapid Radiations of Cichlid Fish.

Systematic Biology, 2020
The Midas cichlids of the Amphilophus citrinellus spp. species complex from Nicaragua (13 species) are an extraordinary example of adaptive and rapid radiation (< 24,000 years old).
M. Olave, A. Meyer
semanticscholar   +1 more source

Behavior of Rio Sao Francisco Piranhas in Response to Changes in Space and Density

Zoo Biology, EarlyView.
ABSTRACT Previous observations of Rio Sao Francisco piranhas (Pygocentrus piraya) at Cleveland Metroparks Zoo revealed frequent aggressive interactions, which were associated with the injury and death of some individuals. Fishes are known to increase aggressive behavior when available space is limited.
Ronald G. Oldfield, Josie E. Thal, Nick J. Zarlinga, Kristen E. Lukas, Jason D. Wark   +4 more
wiley   +1 more source