INTRODUCTION. .......... ....................................................... Historical. ..................................................................... Materials and methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Analysis of data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

This paper presents a brief review of the factors affecting flystrike (cutaneous myiasis) as background to the on-going analysis of information on strike incidence, flock management, weather conditions and fly abundance in three discrete sheep grazing areas in eastern Australia (Flinders Island, Gunning and Inverell). These data were assembled in the late 1980s early 1990s as part of a program ...

Many animals spend their lives performing two often mutually exclusive tasks: feeding and watching out for predators (anti-predator vigilance). There have been many theoretical and empirical studies investigating this trade-off, especially for birds. An important characteristic of a flock of real birds is the area occupied by the flock. Individuals feeding close together experience increased co...

Ecological speciation is well-known from adaptive radiations in cichlid fishes inhabiting lentic ecosystems throughout the African rift valley and Central America. Here, we investigate the ecological and morphological diversification of a recently discovered lotic predatory Neotropical cichlid species flock in subtropical South America. We document morphological and functional diversification u...

In this paper, we describe a complete computer classification of the hemisystems in the two known flock generalized quadrangles of order (5, 5) and give numerous further examples of hemisystems in all the known flock generalized quadrangles of order (s, s) for s 6 11. By analysing the computational data, we identify two possible new infinite families of hemisystems in the classical generalized ...

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Scenes filled with moving objects are often hierarchically organized: the motion of a migrating goose is nested within the flight pattern of its flock, the motion of a car is nested within the traffic pattern of other cars on the road, the motion of body parts are nested in the motion of the body. Humans perceive hierarchical structure even in stimuli with two or three moving dots. An influenti...

We investigate the use of neural fields for building a distributed behavioral model enabling several agents to move in a flock. No leader is required, and each agent is implemented as an independent element that follows its own behavioral model which is composed of four steering behaviors: separation, cohesion, alignment and obstacle avoidance. The synchronized motion of the flock emerges from ...

This cross-sectional study was conducted to estimate seroprevalence and to identify flock-level factors associated with seropositivity to brucellosis in small ruminants in Kerman province, southeastern Iran. In October-November 2011, serum samples were randomly collected from 1767 sheep and 1233 goats, older than 18 months, from 300 flocks. The sera were initially screened for the presence of a...

In this dissertation, I generalize the relocation analysis of MAC algorithms for Mobile Ad-hoc Network by creating different mobility models. The models of Constrainedjump mobility, Parallel-motion and Flock mobility were implemented in TOSSIM. The Constrained-jump model is used for simulating two versions of a MAC Algorithm [3, 9] and comparing their performance. Two functions are derived from...