Results 41 to 50 of about 31,138 (282)
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 +4 more
core +2 more sources
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
Hybrid Breakdown in Cichlid Fish
PLOS ONE, 2015 Studies from a wide diversity of taxa have shown a negative relationship between genetic compatibility and the divergence time of hybridizing genomes. Theory predicts the main breakdown of fitness to happen after the F1 hybrid generation, when heterosis subsides and recessive allelic (Dobzhansky-Muller) incompatibilities are increasingly unmasked.
Stelkens, Rike Bahati +2 more
openaire +6 more sources
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
Croatian Journal of Fisheries, 2016 Coptodon walteri Thys van den Audenaerde 1968, an endemic cichlid of Ivory Coast and Liberia, is assessed as Near Threatened due to fishing pressure and loss of habitats, and aquatic pollution as a result of extensive clandestine gold mining in the bed ...
Konan Felix Koffi +4 more
doaj +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
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
The Anatomical Record, EarlyView.Abstract Teleocichla comprises small cichlids that inhabit the rapid streams of Amazonian rivers; however, there has been limited research on their encephalon morphology. This study examined the neuroanatomy of four species, focusing on volumetric measurements of their encephalon subregions, and providing a histological description of the encephalon of
Renan Leão‐Reis +4 more
wiley +1 more source
Oxidative stress in the brain is regulated by social status in a highly social cichlid fish
Frontiers in Behavioral NeuroscienceSocial stress can increase reactive oxygen species and derail antioxidant function in the brain, which may contribute to the onset and progression of mental health disorders.
Peter D. Dijkstra +7 more
doaj +1 more source
Analysis of the meiotic segregation in intergeneric hybrids of tilapias [PDF]
, 2012 Tilapia species exhibit a large ecological diversity and an important propensity to interspecific hybridisation. This has been shown in the wild and used in aquaculture.
Baroiller, Jean-Francois +5 more
core +5 more sources