000			03337cam a2200289 i 4500
001			221
003			ES-VdaCIM
005			20210602140216.0
007			ta
008			130426r19781966 ukd f 001 0 eng
020			_a0412158809 ( _qELBS)
035			_aRebiun22137004 _z
040			_aNz _bglg _eRRCC ed.1999 ISBN 84-340-1141-7 _cUV0 _dOCLCO _dGW5XE _dOCLCF _dUA@ _dCOO _dAU@ _dOCLCQ _dEBLCP _dOCLCQ _dYDX _dUAB _dOCLCQ _dU3W _dOCLCQ _dLEAUB _dES-VdaCIM
080	0		_a519.243:574.3 _2CDU ed. 2016 ISBN 978-84-8143-822-2
100	1		_aSouthwood, T. R. E., _4aut. _9570
245	1	0	_aEcological Methods : _bWith Particular Reference to the Study of Insect Populations / _cby T.R.E. Southwood
250			_aLow-Priced ed.
260			_aCambridge : _bThe English Language Book Society : _bChapman and Hall, _c1978
300			_axxiv, 524 p. : _bil., graf. ; _c24 cm
505	0		_aIntroduction to the Study of Animal Populations -- The Sampling Programme and the Measurement and Description of Dispersion -- Absolute Population Estimates using Marking Techniques -- Absolute Population Estimates by Sampling a Unit of Habitat -- Air, Plants, Plant Products and Vertebrate Hosts -- Absolute Population Estimates by Sampling a Unit of Habitat -- Soil and Litter -- Absolute Population Estimates by Sampling a Unit of Habitat -- Freshwater Habitats -- Relative Methods of Population Measurement and the Derivation of Absolute Estimates -- Estimates based on Products and Effects of Insects -- Observational and Experimental Methods for the Estimation of Natality, Mortality and Dispersal -- The Construction, Description and Analysis of Age-specific Life-tables -- Age-grouping of Insects, Time-specific Life-tables and Predictive Population Models -- Systems Analysis and Modelling in Ecology -- Diversity, Species Packing and Habitat Description -- The Estimation of Productivity and the Construction of Energy Budgets
520			_aThe virtual impossibility of extracting the many different species from a habitat with equal efficiency by a single method (e.g. Nef, 1960). 1.1 Population estimates Population estimates can be classified into a number of different types; the most convenient classification is that adopted by Morris (1955), although he used the terms somewhat differently in a later paper (1960). 1.1.1 Absolute and related estimates The animal numbers may be expressed as a density per unit area of the ground of the habitat. Such estimates are given by nearest neighbour and related techniques (Chapter 2), marking and recapture (Chapter 3), by sampling a known fraction of the habitat (Chapter 4-6) and by removal sampling and random walk techniques (Chapter 7). Absolute population The number of animals per unit area (e.g. hectare, acre). It is almost impossible to construct a budget or to study mortality factors without the conversion of population estimates to absolute figures, for not only do insects often move from the plant to the soil at different developmental stages, but the amount of plant material is itself always changing. The importance of obtaining absolute estimates cannot be overemphasized
650	1	7	_aMuestreo (Estadística) _2CSICAUL _9149
650	1	7	_aBiometría _2CSICAUL _942
650	1	7	_aEstadística. _2CSICAUL _9401
650	1	7	_aEcosistemas _9186 _xMuestreo _2CSICAUL
942			_2udc _cLIBRO
999			_c221 _d221