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Correlates of home range sizes of giraffes, Giraffa camelopardalis
Abiotic, biotic and human influences are factors that can affect animal home ranges. We calculated home range sizes of adult giraffes in the Tarangire-Manyara region of northern Tanzania (NĀ = 132 giraffes with data collected over 6 years), and investigated correlations between home range sizes and environmental and anthropogenic factors (for a subset of NĀ = 71 […]
The Characterisation of Underwater Noise at Facilities Holding Marine Mammals
A collaborative effort was undertaken to delineate underwater noise levels within holding enclosures at marine mammal facilities. Ambient noise levels were measured under normal operating conditions in the enclosures of 14 participating facilities. Facility habitats varied from ocean environments to fully enclosed pools. The means and standard errors of the noise pressure spectral densities measured […]
The representativeness of a semi-random sampling method for animal welfare assessments on mink farms
In this study we present a semi-random sampling method developed for the sampling of mink (Neovison vison) for on-farm welfare assessments according to the WelFur-Mink system. The only information required for implementation of this method is the number of cages in use in each shed on the farm. The representativeness of samples selected with this […]
Methodologies for the Care, Maintenance, and Breeding of Tropical Poison Frogs
The Biodiversity Laboratories at Saint Joseph’s University house more than 100 exotic and endangered animal species-including insects, fish, amphibians, and reptiles. Research in the laboratories is devoted, primarily, to understanding the genetic and ecological bases of animal behavior. In addition, a common theme of the work is the development of techniques for the successful care […]
Determinants of Home Range Size for Polar Bears (Ursus maritimus)
The mean home range size of female polar bears (Ursus maritimus; 125 100 km2 Ā± 11 800; n = 93) is substantially larger than the predicted value (514 km2) for a terrestrial carnivore of similar weight. To understand this difference, we correlated home range size and sea ice characteristics. Home range size was related to […]
Stress in Broiler Chickens Due to Acute Noise Exposure
Stress effects from acute noise exposure were monitored in a group of ROSS 308 broiler chickens (n = 80), aged 42 days. The experiment simulated slaughterhouse sounds to which the broilers were exposed for 10 min in the test enclosure. Effects of acute noise exposure at two different levels (80 dB and 100 dB) were […]
The effect of flicker from fluorescent lights on mate choice in captive birds
The visual systems of birds are hypothesized to have higher temporal resolution than those of humans, suggesting that they may be able to perceive the flicker emitted from conventional low-frequency fluorescent lights (LF; 100 Hz in Europe, 120 Hz in the U.S.A.). These lights are commonly used in the housing of captive birds and this […]
Turkeys prefer fluorescent light with supplementary ultraviolet radiation
Turkeys are usually reared under incandescent or fluorescent lamps which emit minimal radiation in the ultraviolet region. Because turkeys have the capacity to be visually sensitive to ultraviolet radiation (UV), this possibly makes such light sources unsuited to the visual ecology of turkeys. Previous work showed that providing UV in conjunction with straw and visual […]
The effect of flipper banding on the breeding success of African Penguins Spheniscus demersus at Boulders Beach, South Africa
Concerns have been expressed over the impact of flipper banding on the survival and reproductive performance of penguins. This study compared the breeding success of banded and unbanded African Penguins Spheniscus demersus at Boulders Beach, South Africa, in 2006. It was based on 100 nests; 50 had at least one banded adult and 50 had […]
Finding a parent in a king penguin colony: the acoustic system of individual recognition
To be fed, a king penguin, Aptenodytes patagonicus , chick must identify the call of its parents, in the continuous background noise of the colony. To study this recognition process, we played back to the chicks parental calls with acoustic parameters modified in the temporal and frequency domains. The parental call is composed of syllables […]