Results 61 to 70 of about 38,723 (312)
Hematology in ornamental discus fish Symphysodon discus from Amazonian, Brazil [PDF]
Brazilian Journal of BiologySymphysodon discus is known in the world of aquariums for its market value, beauty, and behavior. However, more substantial information about its physiology and biology must be available, which can hinder its development and maintenance in breeding ...
M. W. S. Ribeiro +2 more
doaj +1 more source
Mapping epigenetic divergence in the massive radiation of Lake Malawi cichlid fishes
Nature Communications, 2020 Epigenetic variation modulates gene expression and can be heritable. However, knowledge of the contribution of epigenetic divergence to adaptive diversification in nature remains limited.
G. Vernaz +9 more
semanticscholar +1 more source
The Influence of Body Size and Hemoglobin Multiplicity on Critical Oxygen Threshold in Red Drum (Sciaenops ocellatus) [PDF]
, 2016 Hypoxia is common in marine environments and fishes use a suite of cardiorespiratory adjustments to defend aerobic metabolism, including reducing standard metabolic rate (SMR), the minimum metabolic rate needed to sustain life at a specified temperature,
Pan, Yihang
core +1 more source
Frontiers in Ecology and EvolutionMale-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 +4 more
doaj +1 more source
Movement of transposable elements contributes to cichlid diversity
bioRxiv, 2020 African cichlid fishes are a prime model for studying the mechanisms of speciation. Despite the development of extensive genomic resources, it has been difficult to determine which sources of genetic variation are responsible for variation in cichlid ...
K. Carleton +8 more
semanticscholar +1 more source
The Midas cichlid species complex: incipient sympatric speciation in Nicaraguan cichlid fishes? [PDF]
Molecular Ecology, 2004 AbstractSympatric speciation is a contentious concept, although theoretical models as well as empirical evidence support its relevance in evolutionary biology. The Midas cichlid species complex (Amphilophus citrinellus,labiatus,zaliosus) from several crater lakes in Nicaragua fits several of the key characteristics of a sympatric speciation model.
Barluenga, Marta, Meyer, Axel
openaire +3 more sources
Decoupled jaws promote trophic diversity in cichlid fishes
Evolution; international journal of organic evolution, 2020 Functional decoupling of oral and pharyngeal jaws is widely considered to have expanded the ecological repertoire of cichlid fishes. But, the degree to which the evolution of these jaw systems is decoupled and whether decoupling has impacted trophic ...
E. Burress +2 more
semanticscholar +1 more source
Acta Scientiarum: Animal Sciences, 2011 This study evaluated the apparent protein and energy digestibility of common feed ingredients (soybean meal, fish meal, wheat meal and corn) by juvenile oscars using two different sampling intervals (30 min. and 12h).
Thiago Matias Torres do Nascimento +4 more
doaj +1 more source
Evolutionary dynamics of pre- and postzygotic reproductive isolation in cichlid fishes
Philosophical Transactions of the Royal Society of London. Biological Sciences, 2020 Cichlid fishes are exceptionally species-rich, speciated at explosive rates and, hence, are a model system in speciation research. Yet, their reproductive isolating barriers have, so far, not been comprehensively studied.
Sina J. Rometsch +2 more
semanticscholar +1 more source
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 +3 more
wiley +1 more source