Términos relacionados

2 resultados encontrados para: AUTOR: Boitani, Luigi
  • «
  • 1 de 1
  • »
1.
Artículo
*En hemeroteca, SIBE-Chetumal
Predicting potential distribution of the jaguar (Panthera onca) in Mexico: identification of priority areas for conservation
Rodríguez Soto, Clarita (autora) ; Monroy Vilchis, Octavio (autor) ; Maiorano, Luigi (autor) ; Boitani, Luigi (autor) ; Faller Menéndez, Juan Carlos (autor) ; Briones Salas, Miguel Ángel (autor) ; Núñez, Rodrigo (autor) ; Rosas Rosas, Octavio C. (autor) ; Ceballos González, Gerardo Jorge (autor) ; Falcucci, Alessandra (autora) ;
Disponible en línea
Contenido en: Diversity and Distribution Vol. 17, no. 2 (March 2011), p. 350-361 ISSN: 1366-9516
Bibliotecas: Chetumal
Cerrar
SIBE Chetumal
60519-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Chetumal
Resumen en: Inglés |
Resumen en inglés

Aim The jaguar, Panthera onca , is a species of global conservation concern. In Mexico, the northernmost part of its distribution range, its conservation status, is particularly critical, while its potential and actual distribution is poorly known. We propose an ensemble model (EM) of the potential distribution for the jaguar in Mexico and identify the priority areas for conservation. Location Mexico. Methods We generated our EM based on three presence‐only methods (Ecological Niche Factor Analysis, Mahalanobis distance, Maxent) and considering environmental, biological and anthropogenic factors. We used this model to evaluate the efficacy of the existing Mexican protected areas (PAs), to evaluate the adequacy of the jaguar conservation units (JCUs) and to propose new areas that should be considered for conservation and management of the species in Mexico. Results Our results outline that 16% of Mexico (c. 312,000 km2) can be considered as suitable for the presence of the jaguar. Furthermore, 13% of the suitable areas are included in existing PAs and 14% are included in JCUs (Sanderson et al. , 2002). Main conclusions Clearly much more should be carried out to establish a proactive conservation strategy. Based on our results, we propose here new jaguar conservation and management areas that are important for a nationwide conservation blueprint.


2.
Libro
Research techniques in animal ecology: controversies and consequences / Luigi Boitani and Todd K. Fuller, editors
Boitani, Luigi (ed.) ; Fuller, T. K. (coed.) ;
New York : Columbia University Press , c2000
Clasificación: 591.5 / R47
Bibliotecas: Chetumal , San Cristóbal
Cerrar
SIBE Chetumal
ECO030001429 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
ECO010014795 (Prestado)
Disponibles para prestamo: 0
Índice | Resumen en: Inglés |
Resumen en inglés

The present biodiversity crisis is rife with opportunities to make important conservation decisions; however, the misuse or misapplication of the methods and techniques of animal ecology can have serious consequences for the survival of species. Still, there have been relatively few critical reviews of methodology in the field. This book provides an analysis of some of the most frequently used research techniques in animal ecology, identifying their limitations and misuses, as well as possible solutions to avoid such pitfalls. In the process, contributors to this volume present new perspectives on the collection, analysis, and interpretation of data. Research Techniques in Animal Ecology is an overarching account of central theoretical and methodological controversies in the field, rather than a handbook on the minutiae of techniques. The editors have forged comprehensive presentations of key topics in animal ecology, such as territory and home range estimates, habitation evaluation, population viability analysis, Gis mapping, and measuring the dynamics of societies. Striking a careful balance, each chapter begins by assessing the shortcomings and misapplications of the techniques in question, followed by a thorough review of the current literature, and concluding with possible solutions and suggested guidelines for more robust investigations.

Índice

Authors
List of Illustrations
List of Tables
Preface
Chapter 1: Hypothesis Testing in Ecology
Some Definitions
What Is a Hypothesis?
Hypotheses and Models
Hypotheses and Paradigms
Statistical Hypotheses
Hypotheses and Prediction
Acknowledgments
Literature Cited
Chapter 2: A Critical Review of the Effects of Marking on the Biology of Vertebrates
Review of the Literature
Which Markers to Use?
Effects of Markers Among Taxa
Critique of Marker Evaluation Studies
Review of Current Guidance Available for Choosing Markers
Critique of Guidelines Available for Choosing Markers
Survey of Recent Ecological Studies
Future Approaches
Study Protocols and Technological Advances
Marker Evaluation Studies
Acknowledgments
Literature Cited
Chapter 3: Animal Home Ranges and Territories and Home Range Estimators
Definition of Home Range
Territories
Estimating Animals’ Home Ranges
Utility Distributions
Grids
Minimum Convex Polygon. Circle and Ellipse Approaches
Fourier Series
Harmonic Mean Distribution
Fractal Estimators
Kernel Estimators
Home Range Core
Quantifying Home Range Overlap and Territoriality
Static Interactions
Dynamic Interactions
Testing for Territoriality
Lessons
Acknowledgments
Literature Cited
Chapter 4: Delusions in Habitat Evaluation: Measuring Use, Selection, and Importance
Terminology
Methods for Evaluating Habitat Selection, Preference, and Quality
Use–Availability Design
Site Attribute Design
Demographic Response Design
Problems with Use–Availability and Site Attribute Designs
Defining Habitats
Measuring Habitat Use
Measuring Habitat Availability
Assessing Habitat Selection: Fatal Flaw 1
Inferring Habitat Quality: Fatal Flaw 2
Advantages and Problems of the Demographic Response Design
Applications and Recommendations
Acknowledgments
Literature Cited
Chapter 5: Investigating Food Habits of Terrestrial Vertebrates

Conventional Approaches and Their Limitations
Direct Observation
Lead Animals
Feeding Site Surveys
Exclosures
Postingestion Samples
Evaluating the Importance of Specific Foods and Prey
Use, Selection, or Preference?
Availability Versus Abundance
Cafeteria Experiments
Innovations
Improvements on Lead Animal Studies
Use of Isotope Ratios
Experimental Manipulations
The Role of Foraging Theory in Understanding Food Habits
Lessons
Sample Resolution and Information Obtained
Improving Sample Resolution and Information Content
Literature Cited
Chapter 6: Detecting Stability and Causes of Change in Population Density
Detection of Density Dependence
Analysis of Time Series of Density
Analysis of Data on Mortality or Survival
Detection of Delayed Density Dependence
Detection of Causes of Population Change
Key Factor Analysis
Experimental Manipulation
Conclusions
Literature Cited
Chapter 7: Monitoring Populations
Index–Abundance Relationships
Types of Indices
Index–Abundance Functions
Variability of Index–Abundance Functions
Improving Index Surveys
Spatial Aspects of Measuring Changes in Indices
Monitoring Indices Over Time
Power Estimation for Monitoring Programs
Variability of Indices of Animal Abundance
Sampling Requirements for Robust Monitoring Programs
Setting Objectives for a Monitoring Program
Conclusions
Acknowledgments
Appendix 7.1
Literature Cited
Chapter 8: Modeling Predator–Prey Dynamics
Modeling Approaches for Predator–Prey Systems
Noninteractive Models
True Predator–Prey Models
Stochastic Models
Autoregressive Models
Fitting the Model to Data
Bayesian Statistics
Best Guess Followed by Adaptive Management
Choosing a Good Model
How Much Detail?
Model Validation
Recommendations
Remember the Audience
Conclusion
Acknowledgments
Literature Cited
Chapter 9: Population Viability Analysis: Data Requirements and Essential Analyses

Qualitative Observations About Population Persistence
Generalities
Contradictions
Sources of Variation Affecting Population Persistence
No Variation
Stochastic Variation
Demographic Variation
Temporal Variation
Spatial Variation
Individual Variation
Process Variation
Components of a PVA
Direct Estimation of Variance Components
Indirect Estimation of Variance Components
Bootstrap Approach
Basic Population Model and Density Dependence
Incorporation of Parameter Uncertainty into Persistence Estimates
Discussion
Conclusion
Literature Cited
Chapter 10: Measuring the Dynamics of Mammalian Societies: An Ecologist’s Guide to Ethological Methods
Social Dynamics
Context
Why Study Social Dynamics?
Evolution of Sociality
Conservation Applications
Understanding Ourselves
How to Describe Social Dynamics
Action, Interaction, and Relationships
Social Networks
Social Structure, from Surface to Deep
Behavioral Parameters
The Bout
Stationarity
The Ethogram
Beware Teleology
Classifications of Behavioral Interactions
Methods for Behavioral Measurement
Identifying the Individual
Sampling and Recording Rules
Ad Libitum Sampling
Focal Sampling
Time Sampling
Techniques for Behavioral Measurement
Analysis of Observational Data
Statistical Rationality
Matrix Facilities: Analyzing Sequential Data
Lag Sequential and Nested Analysis
Searching for a Behavioral Pattern (Markov Chain)
Predictability of Behavior
Sequences Through the Mist
Acknowledgments
Literature Cited
Chapter 11: Modeling Species Distribution with GIS
Terminology
Habitat Definitions and Use
General Structure of GIS-Based Models
Literature Review
Modeling Issues
Clear Objectives
Assumptions
Spatial and Temporal Scale
Data Availability
Validation and Accuracy Assessment
Discussion
Conclusions
Acknowledgments
Notes
Literature Cited
Index