Results 61 to 70 of about 38,423 (309)

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, C. M. Martinez, P. Wainwright   +2 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

Hematology in ornamental discus fish Symphysodon discus from Amazonian, Brazil [PDF]

Brazilian Journal of Biology
Symphysodon 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, A. R. S. Liebl, A. T. Oliveira   +2 more
doaj   +1 more source

Within-guild dietary discrimination from 3-D textural analysis of tooth microwear in insectivorous mammals [PDF]

, 2013
Resource exploitation and competition for food are important selective pressures in animal evolution. A number of recent investigations have focused on linkages between diversification, trophic morphology and diet in bats, partly because their roosting ...
Crumpton, Nicholas, Gill, Pamela G, Jones, Gareth, Purnell, Mark A, Rayfield, Emily J   +4 more
core   +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, Julián Torres‐Dowdall, A. Meyer   +2 more
semanticscholar   +1 more source

Effects of different sampling intervals on apparent protein and energy digestibility of common feed ingredients by juvenile oscar fish (Astronotus ocellatus) - doi: 10.4025/actascianimsci.v34i2.10541

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, Thiago El Hadi Perez Fabregat, Laurindo André Rodrigues, Nilva Kazue Sakomura, João Batista Kochenborger Fernandes   +4 more
doaj   +1 more source

Chromosome-scale assemblies reveal the structural evolution of African cichlid genomes

bioRxiv, 2018
Background African cichlid fishes are well known for their rapid radiations and are a model system for studying evolutionary processes. Here we compare multiple, high-quality, chromosome-scale genome assemblies to understand the genetic mechanisms ...
Matthew A. Conte, R. Joshi, Emily C. Moore, Sri Pratima Nandamuri, William J. Gammerdinger, Reade B. Roberts, K. Carleton, S. Lien, T. Kocher   +8 more
semanticscholar   +1 more source

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

Toxicity of Commonly Used Plasticizers to the Freshwater Organisms Tilapia sparrmanii (Fish) and Caridina nilotica (Shrimp): Lethal and Sublethal Effects

Environmental Toxicology, EarlyView.
ABSTRACT The toxicity of microplastics in aquatic environments is usually due to plasticizers, the chemical additives that keep the plastic polymers together. Thus, the current study reports on the toxicity of three common plasticizers found in freshwater ecosystems and their impacts on two South African freshwater organisms at the organismal and ...
Paul Kojo Mensah, Neil John Griffin, Ntombekhaya Mgaba, Margaret Fafa Awushie Akwetey, Oghenekaro Nelson Odume   +4 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