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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Cognitive and aggressive behaviours in the annual killifish, Nothobranchius orthonotus
 Kubická, Lucie ; Reichard, Martin (advisor) ; Horký, Pavel (referee)
I used annual killifish Nothobranchius orthonotus to investigate two separate questions related to behavioural aspects of their life history. The first study focused on spatial cognitive ability of two N. orthonotus populations that originated from temporary pools that varied in their expected duration due to differences in annual precipitation patterns (dry and humid region). Test of cognition was based on the ability to learn to find food in a dichotomous test. It was assumed that learning ability differs between populations when tested in young and old age along with their difference in captive lifespan. Additionally, association between cognitive ability and other life history traits was tested. It was found that: (1) there was no difference in the ability to learn spatial task between populations; (2) both populations had similar lifespan with no cognitive decay in older age, and older fish from dry region population had committed even less errors in the learning task than they did as young fish; (3) fish were able to effectively learn the task but (4) solitary fish had lower learning ability than group-reared fish; (5) longer- living fish were quicker learners; (6) high resting metabolic rate was associated with more effective learning; (7) hesitant fish found the food reward in learning task...
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