scholarly journals The common neural parasitePseudoloma neurophiliacauses altered shoaling behaviour in adult laboratory zebrafish (Danio rerio) and its implications for neurobehavioural research

2016 ◽  
Vol 40 (3) ◽  
pp. 443-446 ◽  
Author(s):  
S Spagnoli ◽  
J Sanders ◽  
M L Kent
Keyword(s):  
Danio Rerio ◽  
Shoaling Behaviour ◽  
The Common

scholarly journals Timing and plasticity of shoaling behaviour in the zebrafish, Danio rerio

2007 ◽  
Vol 74 (5) ◽  
pp. 1269-1275 ◽  
Author(s):  
Raymond E. Engeszer ◽  
Laura Alberici Da Barbiano ◽  
Michael J. Ryan ◽  
David M. Parichy
Keyword(s):  
Danio Rerio ◽  
Shoaling Behaviour

scholarly journals Behavioural effects of the common brain-infecting parasite Pseudoloma neurophilia in laboratory zebrafish (Danio rerio)

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Helene L. E. Midttun ◽  
Marco A. Vindas ◽  
Lauren E. Nadler ◽  
Øyvind Øverli ◽  
Ida B. Johansen
Keyword(s):  
Danio Rerio ◽  
Behavioural Effects ◽  
The Common

scholarly journals To group or not to group: Effect of prolonged exposure to predation and resource availability on the shoaling behaviour of zebrafish (Danio rerio)

2020 ◽  
Author(s):  
Nawaf Abdul Majeed ◽  
Vivek Philip Cyriac ◽  
Ullasa Kodandaramaiah
Keyword(s):  
Danio Rerio ◽  
Resource Availability ◽  
Environmental Conditions ◽  
Prolonged Exposure ◽  
Group Structure ◽  
Food Resource ◽  
Group Living ◽  
Predation Pressure ◽  
Trade Off ◽  
Shoaling Behaviour

AbstractIndividuals of many species live in groups to obtain anti-predatory advantages, foraging benefits and for social reasons. Living in large groups can reduce predation, but as group size increases, competition for resources also increases. The trade-off between the advantages of group living for an individual and competition caused by it can determine group dynamics, and this trade-off can vary with environmental conditions. Shoaling behaviour, the tendency of fish to form groups, is shown to be affected by factors such as resource availability, presence of predators and conspecifics. Although studies indicate that both predation and starvation pressure in an environment can determine whether fish choose to shoal or not, whether prolonged exposure to such conditions influences shoaling behaviour remains little explored. Here, we test how predation pressure and resource availability may interactively shape the shoaling behaviour of zebrafish (Danio rerio) when exposed to combinations of these pressures over a two-week period. We find that shoal size increases with predation and decreases with starvation, and that greater predation pressure increases shoaling tendencies even under reduced food availability. Overall, we show that prolonged exposure to varying predation pressure and resource availability can together influence shoaling tendencies of fish even when such pressures are relaxed.Significant statementIn group living species, group structure and dynamics depend on various intrinsic factors and environmental stressors. Shoaling behaviour in fish, where individuals aggregate to form groups, is shown to be altered with environmental factors such as predation and resource availability. Although studies have examined the effects of these cues on shoaling behaviour, the ecological circumstances experienced by fish could also influence shoaling tendencies. We here show that shoaling behaviour is also shaped by previous experience of fish to predation and food resource availability. We check how shoaling behaviour varies with differences in predation pressure and resource availability after prolonged exposure to these conditions by measuring the shoal size and shoal cohesion in zebrafish. This study illuminates how shoaling tendencies of individuals shaped by the environmental conditions persist even when these environmental pressures are removed.

scholarly journals A zebrafish-centric approach to antiepileptic drug development

2021 ◽  
Vol 14 (7) ◽  
Author(s):  
Scott C. Baraban
Keyword(s):  
Drug Development ◽  
High Throughput ◽  
Drug Screening ◽  
Danio Rerio ◽  
Genetic Manipulation ◽  
Dravet Syndrome ◽  
Developmental Studies ◽  
Compassionate Use ◽  
Larval Zebrafish ◽  
The Common

ABSTRACT Danio rerio (zebrafish) are a powerful experimental model for genetic and developmental studies. Adaptation of zebrafish to study seizures was initially established using the common convulsant agent pentylenetetrazole (PTZ). Larval PTZ-exposed zebrafish exhibit clear behavioral convulsions and abnormal electrographic activity, reminiscent of interictal and ictal epileptiform discharge. By using this model, our laboratory developed simple locomotion-based and electrophysiological assays to monitor and quantify seizures in larval zebrafish. Zebrafish also offer multiple advantages for rapid genetic manipulation and high-throughput phenotype-based drug screening. Combining these seizure assays with genetically modified zebrafish that represent Dravet syndrome, a rare genetic epilepsy, ultimately contributed to a phenotype-based screen of over 3500 drugs. Several drugs identified in these zebrafish screens are currently in clinical or compassionate-use trials. The emergence of this ‘aquarium-to-bedside’ approach suggests that broader efforts to adapt and improve upon this zebrafish-centric strategy can drive a variety of exciting new discoveries.

Quantification of shoaling behaviour in zebrafish (Danio rerio)

2007 ◽  
Vol 184 (2) ◽  
pp. 157-166 ◽  
Author(s):  
Noam Miller ◽  
Robert Gerlai
Keyword(s):  
Danio Rerio ◽  
Shoaling Behaviour

Catalogue reduction techniques

1978 ◽  
Vol 48 ◽  
pp. 389-390 ◽  
Author(s):  
Chr. de Vegt
Keyword(s):  
Adjustment Process ◽  
Proper Motions ◽  
Measuring Process ◽  
Aerial Photogrammetry ◽  
Reduction Techniques ◽  
Observational Technique ◽  
The Common ◽  
Astrometric Data

AbstractReduction techniques as applied to astrometric data material tend to split up traditionally into at least two different classes according to the observational technique used, namely transit circle observations and photographic observations. Although it is not realized fully in practice at present, the application of a blockadjustment technique for all kind of catalogue reductions is suggested. The term blockadjustment shall denote in this context the common adjustment of the principal unknowns which are the positions, proper motions and certain reduction parameters modelling the systematic properties of the observational process. Especially for old epoch catalogue data we frequently meet the situation that no independent detailed information on the telescope properties and other instrumental parameters, describing for example the measuring process, is available from special calibration observations or measurements; therefore the adjustment process should be highly self-calibrating, that means: all necessary information has to be extracted from the catalogue data themselves. Successful applications of this concept have been made already in the field of aerial photogrammetry.

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