Western gorilla diet: A synthesis from six sites
The objective of this paper is to collate information on western gorilla diet from six study sites throughout much of their current range, including preliminary information from two sites (Afi and Lossi), where studies of diet have begun only recently. Food lists were available from each site, derived from indirect signs of gorilla feeding (such […]
Use of space in the domestic fowl: separating the effects of enclosure size, group size and density
An understanding of how confined animals move within the space available to them is essential in the design of effective captive environments that maximize animal welfare. In addition to the obvious effect of enclosure size, other factors such as the number of individuals in the group and their density per unit of area are likely […]
Social network analysis of the behavioural interactions that influence the development of fin damage in Atlantic salmon parr (Salmo salar) held at different stocking densities
Social network analysis of behavioural interactions was used to quantify the effect of high (HD, 30 kg m-3) and low (LD, 8 kg m-3) stocking densities on the frequency and severity of fin damage in Atlantic salmon. Dorsal fin damage (erosion, splits, fin index) was significantly higher in HD compared to LD groups with higher amounts of dorsal fin […]
Separating the Impact of Group Size, Density, and Enclosure Size on Broiler Movement and Space Use At a Decreasing Perimeter to Area Ratio
The goal of this study was to determine the impact of enclosure size on space use and movement patterns of domestic fowl (Gallus gallus domesticus), independent of group size and density. Research designed to estimate the effects of group size, density, or enclosure size involves inherent confounding between factors, clouding their individual effects. This experimental […]
Use of pen space and activity of broiler chickens reared at two different densities
A better understanding of the motivation of broiler chickens reared indoors to go to and remain in a different part of the pen (or not) could help to provide appropriate organisation of the rearing space on farms. This study was performed to determine whether broiler chickens reared in large pens (9 m×5 m) congregate in […]
Dense, small and male-biased cages exacerbate male–male competition and reduce female choosiness in Bicyclus anynana
Sexual selection is increasingly recognized to depend upon, and to fluctuate with, major ecological factors in natural environments. The operational sex ratio (OSR) and population density can affect the opportunity for, and strength of, sexual selection but their effects are rarely taken into account in laboratory behavioural studies. In Bicyclus anynana, a model butterfly for […]