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59 resultados encontrados para: TEMA: Evaluación ecológica (Biología)
21.
Tesis
Zonación ambiental del sistema lagunar Chantuto-Panzacola, Chiapas, México / Juana de los Santos Hernández
Santos Hernández, Juana de los ;
Clasificación: TE/577.028709727 / S2
Bibliotecas: Tapachula
Cerrar
SIBE Tapachula
ECO020011171 (Disponible)
Disponibles para prestamo: 1

22.
Libro
Ecological census techniques a handbook / edited by William J. Sutherland
Sutherland, William J. (ed.) ;
Cambridge : Cambridge University Press , 2006
Clasificación: 574.5028 / E2/2006
Bibliotecas: Campeche
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SIBE Campeche
ECO040005711 (Disponible)
Disponibles para prestamo: 1
Índice | Resumen en: Inglés |
Resumen en inglés

This is an updated version of the best selling first edition, Ecological Census Techniques, with updating, some new chapters and authors. Almost all ecological and conservation work involves carrying out a census or survey. This practically focussed book describes how to plan a census, the practical details and shows with worked examples how to analyse the results. The first three chapters describe planning, sampling and the basic theory necessary for carrying out a census. In the subsequent chapters international experts describe the appropriate methods for counting plants, insects, fish, amphibians, reptiles, mammals and birds. As many censuses also relate the results to environmental variability, there is a chapter explaining the main methods. Finally, there is a list of the most common mistakes encountered when carrying out a census.

Índice

List of contributors page
Preface
1 Planning a research programme
Introduction: reverse planning
What is the specific question?
What results are necessary to answer the questions?
What data are needed to complete these analyses?
What protocol is required to obtain these data?
Can the data be collected in the time available?
Modifying the planning in response to time available
Creating data sheets
Start and encounter reality
2 Principles of sampling
Before one starts
Objectives
Know your organism
Censuses and samples
Know the reliability of your estimates
Performing the calculations
Sampling – the basics
Defining sample units and the sampling frame
The need for replication
Ensuring that samples are representative
Deviations from random
The shape and size of sampling units
Estimation of means and total population sizes
The layout of samples
Cluster sampling
Multi-level sampling
Stratified sampling
Adaptive sampling
Repeated counts at the same site
Comparing two or more study areas
Modelling spatial variation in numbers
Surveillance and monitoring
The difference between surveillance and monitoring
Monitoring and adaptive management
Sampling design for surveillance
Describing long-term changes
Alerts and indicators
Planning and managing a monitoring programme
References
3 General census methods
Introduction
Complete counts (1): general
Not as easy as it seems
Sampling the habitat
Attempted complete enumeration
Complete counts (2): plotless sampling
Sample counts (1): mark–recapture methods
Fundamentals of mark–recapture
The two-sample method
Multiple recaptures in closed populations
Multiple recaptures in open populations
The robust model
What area does a trapping grid cover?
Sample counts (2): some other methods based on trapping
The removal method
The change-in-ratio method

Simultaneous marking and recapture: the method of Wileyto et al.
Continuous captures and recaptures: the Craig and du Feu method
Passive distance sampling
Sampling from the whole area
Sample counts (3): ‘mark–recapture’ without capture
Marking without capture
Individual recognition without capture
The double-observer method
The double-survey method
Subdivided point counts
Sample counts (4): N-mixture models
Sample counts (5): distance sampling
General
Line transects
Point transects
Passive distance sampling
Sample counts (6): interception methods
Point quadrats
Line intercepts (cover)
Line intercepts (counts)
Sample counts (7): migrating animals
Continuous migration
Stop-over sites
Population indices
The idea of an index
Overcoming variation in the index ratio
Double sampling
Frequency of occurrence
Basics
Managing the methodology
Sampling strategy and statistical analysis for frequency of occurrence
Subdivision of samples
Appendix: software packages for population estimation
Capture–recapture: closed populations
Capture–recapture: open populations
Ring-recovery models
Multi-state models
Observation-based methods
References
4 Plants
Introduction
Counts
Dafor
Quadrats
Point quadrats
Transects
Mapping terrestrial vegetation
Mapping aquatic vegetation
Seed traps
Sampling of seedbanks
Phytoplankton
Benthic algae
Marking and mapping individuals
References
5 Invertebrates
Introduction
Direct searching and collecting
Trapping
Extraction from the substrate
Storing, killing and preserving invertebrates
Searching and direct observation (terrestrial and aerial)
Pitfall traps
Sweep netting
Vacuum sampling
Beating
Fogging
Malaise traps
Window or interception traps
Water traps
Light traps
Other aerial attractants and traps
Terrestrial emergence trap

Terrestrial emergence traps
Digging and taking soil cores
Litter samples and desiccation funnels
Searching and direct observation (aquatic)
Pond netting
Cylinder samplers
Aquatic bait traps
Aquatic emergence traps
Digging, taking benthic cores and using grabs
Kick sampling
References
6 Fish
Introduction
Bankside counts
Underwater observations
Electric fishing
Seine netting
Trawling
Lift, throw and push netting
Hook and lining
Gill netting
Trapping
Hydroacoustics
Visual estimates of eggs
Volumetric estimates of eggs
Plankton nets for catching eggs
Emergence traps for eggs
References
7 Amphibians
Introduction
Recognising individuals
Detection probability
Drift netting
Scan searching
Netting
Trapping
Transect and patch sampling
Removal studies
Call surveys
Using multiple methods
Recording other data
References
8 Reptiles
Introduction
Hand capturing
Noosing
Trapping
Marking individuals
References
9 Birds
Introduction
Listing methods
Timed species counts
Territory mapping
Transects
Line transects
Point counts or point transects
Correcting for differences in detection probabilities
Capture techniques
Catch per unit effort
Capture–mark–recapture
Counting nests in colonies
Counting roosts
Counting flocks
Counting migrants
Indirect methods of censusing
Dropping counts
Footprints and tracking strips
Response to playback
Vocal individuality
References
10 Mammals
Introduction
Nesting or resting structures
Bat roosts and nurseries
Line transects
Aerial surveys
Individual recognition
Counting calls
Trapping
Counting dung
Feeding signs for herbivores
Counting footprints and runways
Hair tubes and hair catchers
Counting seal colonies
References
11 Environmental variables
Introduction

Wind and water flow
Wind
Water flow
Other kinds of water movement
Rainfall
Temperature
Humidity
pH
Duration of sunshine
Slope angles and height above shore
Light
Aquatic light
Water turbidity
Conductivity
Salinity
Preamble to water chemistry
Dissolved oxygen
Nitrogenous compounds
Phosphorus compounds
Water-testing kits
Soil and sediment characteristics
Redox potential
Oxygen in soils and sediments
References
12 The twenty commonest censusing sins
Index


23.
Libro
Zooindication - based monitoring of anthropogenic transformations in Bialowieza primeval forest / edited by Andrzej Szujecki
Szujecki, Andrzej (editor) ;
Warsaw, Poland : Warsaw Agricultural University Press , c2006
Clasificación: 577.0287 / Z6
Bibliotecas: Tapachula
Cerrar
SIBE Tapachula
ECO020011415 (Disponible)
Disponibles para prestamo: 1

24.
Artículo
*Solicítelo con su bibliotecario/a
Ecological remarks on Mastigodiaptomus nesus, Bowman 1986 (Copepoda, Calanoida) in a Mexican karstic sinkhole
Cervantes Martínez, Adrián (coaut.) ; Elías Gutiérrez, Manuel (coaut.) ; Gutiérrez Aguirre, Martha Angélica (coaut.) ; Kotov, Alexey A. (coaut.) ;
Contenido en: Hydrobiologia Vol. 542, no. 1 (July 2005), p. 95-102 ISSN: 0018-8158
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Mastigodiaptomus nesus (Bowman, 1986) was previously described from the West Indies, and its distribution was considered restricted to these islands. Recently it has been detected in several systems from the continental Yucatan Peninsula in Mexico. In this study, we contribute to the body size variability, abundance, distribution and vertical migration of Mastigodiaptomus nesus dwelling in a small, deep (264 m2, 47 m deep) karstic beaker-shaped sinkhole, located in this Peninsula. Here, this species is an important component of the zooplankton community during all the year. We analyzed the relationship between its abundance and concentration of nutrients (NO)3), and Chlorophyll a. Differences in body size by sex (F ¼ 67.56, p < 0.0001; n ¼ 180), and sampled season (F ¼ 6.59, p < 0.01; n ¼ 180) were found. When animals from this sinkhole were compared with other localities, size difference was detected. Bigger animals were found in the West Indies, and smaller ones in continental localities.

The nauplii were the most abundant development instars, followed by copepodids, and adults. In general, all developmental instars had a normal migration, with higher abundance at night time in upper layers (0.5 and 5 m), and diminishing towards daylight time. Direction of migrations seems to be towards the walls of the sinkhole (horizontal migration) instead of the deeper water layers, suggesting that these copepods are hidden in the irregular calcareous walls of the sinkhole. Abundance of total copepodid developmental stages were correlated with the Chl-a concentration. In addition, we found a highly significant difference between Chl-a concentration (F ¼ 24.172, p < 0.001, n ¼ 72), and NO)3 concentration at all strata among seasons (F ¼ 25.46, p < 0.001, n ¼ 60). Our results suggest that the body size of M. nesus is influenced by the nutrient concentration, and its vertical abundance and distribution may be explained by food availability.


25.
Libro
Ecology: the experimental analysis of distribution and abundance / Charles J. Krebs
Krebs, Charles J. ;
San Francisco, California : Benjamin Cummings :: Addison Wesley Longman , c2001
Clasificación: 574.5028 / K7/2001
Bibliotecas: Tapachula , Villahermosa
Cerrar
SIBE Tapachula
ECO020006136 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Villahermosa
ECO050001178 (Disponible)
Disponibles para prestamo: 1

26.
Libro
A guidebook for integrated ecological assessments / Mark E. Jensen, Patrick S. Bourgeron, editors
Jensen, Mark E. (ed.) ; Bourgeron, Patrick S. (coed.) ;
New York : Springer-Verlag , c2001
Clasificación: 577.0287 / G8
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SAA008425 (Disponible)
Disponibles para prestamo: 1

27.
Libro
Análisis de fuentes de impacto y necesidades de investigación científica y monitoreo, en Calakmul, Campeche / Josefina Morales, Sergio Magaña, Sayira Maas
Morales, Josefina ; Magaña, Sergio (coaut.) ; Maas, Sayira (coaut.) ;
s.l. : Pronatura Península de Yucatán :: The Nature Conservancy , 2000
Clasificación: CA/333.9516 / M6
Bibliotecas: Campeche
Cerrar
SIBE Campeche
ECO040001472 (Disponible)
Disponibles para prestamo: 1

28.
Libro

29.
Libro

30.
Libro
Evaluación biológica de los sistemas acuáticos del Parque Nacional Laguna del Tigre, Petén, Guatemala / Brandon T. Bestelmeyer and Leeanne E. Alonso, editors
Bestelmeyer, Brandon T. (ed.) ; Alonso, Leeanne E. (coed.) ;
Washington, Distrito de Columbia, Estados Unidos : Conservación Internacional , c2000
Clasificación: G/333.95098281 / E9
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
ECO010012438 (Disponible)
Disponibles para prestamo: 1