Toward the Quantification of a Conceptual Framework for Movement Ecology Using Circular Statistical Modeling
نویسندگان
چکیده
To analyze an animal's movement trajectory, a basic model is required that satisfies the following conditions: the model must have an ecological basis and the parameters used in the model must have ecological interpretations, a broad range of movement patterns can be explained by that model, and equations and probability distributions in the model should be mathematically tractable. Random walk models used in previous studies do not necessarily satisfy these requirements, partly because movement trajectories are often more oriented or tortuous than expected from the models. By improving the modeling for turning angles, this study aims to propose a basic movement model. On the basis of the recently developed circular auto-regressive model, we introduced a new movement model and extended its applicability to capture the asymmetric effects of external factors such as wind. The model was applied to GPS trajectories of a seabird (Calonectris leucomelas) to demonstrate its applicability to various movement patterns and to explain how the model parameters are ecologically interpreted under a general conceptual framework for movement ecology. Although it is based on a simple extension of a generalized linear model to circular variables, the proposed model enables us to evaluate the effects of external factors on movement separately from the animal's internal state. For example, maximum likelihood estimates and model selection suggested that in one homing flight section, the seabird intended to fly toward the island, but misjudged its navigation and was driven off-course by strong winds, while in the subsequent flight section, the seabird reset the focal direction, navigated the flight under strong wind conditions, and succeeded in approaching the island.
منابع مشابه
The Relationship between Social Entrepreneurship and Sustainable Development from the Social Experts’ Points of View
This research is a survey and exploratory study to present a conceptual model for the sustainable development of Iran based on social entrepreneurship. Its approach for conceptual modeling is based on Path Analysis through Multiple Regression Method. The study has benefited from five questionnaires (four for the Delphi Method’s rounds and another for the conceptual modeling itself). The statist...
متن کاملOptimal search behavior and classic foraging theory
Random walk methods and diffusion theory pervaded ecological sciences as methods to analyze and describe animal movement. Consequently, statistical physics was mostly seen as a toolbox rather than as a conceptual framework that could contribute to theory on evolutionary biology and ecology. However, the existence of mechanistic relationships and feedbacks between behavioral processes and statis...
متن کاملDesigning a Conceptual Framework for Integrating Components of Professional Ethics in a Ceramic Curriculum
Background: Teaching professional ethics in the ceramics branch requires using a standard system of integrating professional ethics components in the ceramics curriculum elements to determine the relationship between professional ethics and the curriculum components. The aim of the present study is a conceptual framework for integrating the elements of professional ethics in the ceramic’s curri...
متن کاملConceptual Agent based Modeling in Supply Chain: An Economic Perspective
Abstract: The implementation of government legislation, social responsibility, environmental concerns regarding the reduction of waste, hazardous material and other consumer residuals have made the competition between the firms stricter than ever and nowadays firms that want to survive need a more productive and innovative approach toward the financial aspects of their businesses.his pape...
متن کاملStrategic Cost-Cutting in Information Technology: toward a Framework for Enhancing the Business Value of IT
The increasing dependency of many businesses with information technology (IT)and the high percentage of the IT investment in all invested capital in businessenvironment ask for more attention to this important driver of business. Thelimitation of capital budget forces the managers to look for more wise investment inIT. There are many cost-cutting techniques in the literature and each of them ha...
متن کامل