Results 21 to 30 of about 5,773 (139)
Reduced genetic diversity and the success of the invasive peacock bass (Cichliformes: Cichlidae)
Brazilian Journal of Biology, 2021 Several species of Cichla successfully colonized lakes and reservoirs of Brazil, since the 1960’s, causing serious damage to local wildlife. In this study, 135 peacock bass were collected in a reservoir complex in order to identify if they represented a ...
S. C. S. Luz +7 more
doaj +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
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
Ecology and Evolution, 2023 Phenotypic plasticity enables development to produce multiple phenotypes in response to environmental conditions. Plasticity driven variation has been suggested to play a key role in adaptive divergence, and plasticity itself can evolve.
Kirsty McWhinnie +3 more
doaj +1 more source
Subordinate Fish Mediate Aggressiveness Using Recent Contest Information
Frontiers in Ecology and Evolution, 2021 Memorizing dominance relationships can help animals avoid unwinnable subsequent contests. However, when competitive ability changes over time—for example, as a function of condition—it may be adaptive to “forget” these dominance relationships and for ...
Takashi Hotta +5 more
doaj +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
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
Aquatic Diversity and Fishing Practices at Tell Tayinat (Türkiye) in the Iron Age
International Journal of Osteoarchaeology, EarlyView.ABSTRACT While agrarian societies of the Iron Age Eastern Mediterranean relied predominantly on crops and herding of domestic stock for subsistence, local wild aquatic fauna offered a welcomed enrichment, and when opportunities occurred, it could have been a staple in the human diet.
Radovan Kabatiar
wiley +1 more source
An Enhanced Soft‐Containing Gripper for Pick‐And‐Place of Oyster Products at Extreme Handling Speed
Journal of Field Robotics, EarlyView.ABSTRACT Soft robotic grippers have been developed for high‐speed handling of soft, fragile foods. For example, our previously designed soft‐containing gripper has been implemented on food production lines. However, existing soft robotic grippers remain inadequate for food pick‐and‐place tasks at extreme handling speeds (e.g., > 70 pcs/min).
Yang Zhang, Zhongkui Wang
wiley +1 more source
Integrative Zoology, EarlyView.Integrating comparative spectrometry, image analysis, and thermal modeling, we reveal that (1) females optimize crypsis via background matching, (2) males prioritize high‐contrast disruptive patterning at a significant thermoregulatory cost (reduced solar heat gain), and (3) habitat‐specific monomorphism in Diploderma slowinskii underscores ecological ...
Yuning Cao, Lin Shi, Yin Qi
wiley +1 more source