Sökning: "Etologi"
Visar resultat 1 - 5 av 96 avhandlingar innehållade ordet Etologi.
1. Colour patterns in warning displays
Sammanfattning : In aposematism a prey species use bright colours, often combined with a black contrasting pattern, to signal unprofitability as prey to potential predators. Although there are several different hypotheses about the presence of these internally contrasting patterns, there is little experimental evidence of any beneficial effects. LÄS MER
2. Behavioural, physiological and morphological correlates of life-history in killifishes − a macroevolutionary approach
Sammanfattning : Life-histories commonly evolve along a continuum from short-lived and fecund, to long-lived and less fecund. Because life-history traits are mostly components of reproduction and survival, understanding the causes and consequences of life-history variation is at the core of evolutionary biology. LÄS MER
3. Social dominance and personality in male fowl (Gallus gallus domesticus)
Sammanfattning : Individuals in social species commonly form dominance relationships among each other, andare often observed to differ in behaviour depending on their social status. However, whethersuch behavioural differences are a consequence of dominance position, or also a cause to it,remains unclear. LÄS MER
4. The relationship between personality and social dominance in the domestic fowl – a critical perspective
Sammanfattning : Social dominance relationships are formed within numerous animal species and reduce costly fights over resources. Dominant individuals often enjoy greater access to important resources such as food and mating partners, and are generally more aggressive, bold, active and explorative compared to subdominant individuals. LÄS MER
5. Resources, the environment, and sex : Examining variation in sexually selected traits in a livebearing fish
Sammanfattning : Striking variation is observed in sexually selected traits. These traits influence the outcome of competition and choice before and after mating. Before mating, animals compete for the access to mating partners and choose who to mate with between several potential mates. LÄS MER