Manual 3. Manual of Sampling and Statistical Methods for Fisheries Biology - Part 1. Sampling Methods

Table of Contents

by
J.A. GULLAND

Fisheries Laboratory
Lowestoft, England

FAO Manuals in Fisheries Science No. 3

FRs/M3

FAO - FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
ROME 1966

FAO MANUALS IN FISHERIES SCIENCE*

Printed
Fib/Ml	Manual of methods in fisheries biology.
FRs/M3	Manual of sampling and statistical methods for fisheries biology. Part 1. Sampling methods. Sections 1-4.
In provisional edition
FB/M2	Manual of fisheries science.
FIb/T26 Suppl. 1	Manual of sampling and statistical methods for fisheries biology.
	Part 2. Statistical methods. Section 5. Computations.
FIb/T40	Manual of methods for fish stock assessment. Part 1. Population analysis.
FIb/T38	Manual of methods for fish stock assessment. Part 2. Tables of yield functions.
FIb/T41	Manual of methods for fish stock assessment. Part 3. Selectivity of fishing gears.
FIb/T51	Manual of methods for fish stock assessment. Part 4. Report on marking.
In preparation
	Manual of sampling and statistical methods for fisheries biology. Part 2. Statistical methods. Section 6 et seq.
	Manual of methods for fish stock assessment. Part 5. Direct assessment.

* World list of scientific periodicals abbreviation: FAO Man. Fish. Sci.

© FAO 1966
Printed in Italy

This electronic document has been scanned using optical character recognition (OCR) software and careful manual recorrection. Even if the quality of digitalisation is high, the FAO declines all responsibility for any discrepancies that may exist between the present document and its original printed version.

Table of Contents

FOREWORD

NOTE

SECTION 1. Introduction and general statistics

1.1 Introduction
1.2 Elementary statistics

Example 1.2.1
Example 1.2.2
Example 1.2.3
Example 1.2.4
Example 1.2.5
Example 1.2.6

SECTION 2. Theory of sampling

2.1 Introduction

Example 2.1.1
Example 2.1.2

2.2 Random sampling

2.2.1 Random numbers

Example 2.2.1.1
Example 2.2.1.2

2.3 Stratified sampling

Example 2.3.1
Example 2.3.2
Example 2.3.3

2.4 Subsampling, or two-stage sampling

Example 2.4.1
Example 2.4.2
Example 2.4.3
Example 2.4.4

SECTION 3. Sampling the catch

3.1 Sampling methods for catch and effort statistics

3.1.1 Statistics required
3.1.2 Definition of population and choice of sampling unit

Example 3.1.2.1

3.1.3 Estimation of total catch

Example 3.1.3.1
Example 3.1.3.2

3.1.4 Estimation of quantity discarded

Example 3.1.4.1

3.1.5 Effort statistics

3.2 Sampling for length composition

3.2.1 Methods of measuring and recording
3.2.2 Selection of the sample
3.2.3 The time and place to sample commercial catches
3.2.4 Stratification

Example 3.2.4.1
Example 3.2.4.2
Example 3.2.4.3
Example 3.2.4.4
Example 3.2.4.5

3.2.5 Size of sample

Example 3.2.5.1

3.2.6 Raising factors

Example 3.2.6.1

3.3 Indirect sampling

Example 3.3.1
Example 3.3.2
Example 3.3.3

SECTION 4. Sampling the population in the sea

4.1 General problems
4.2 Surveys with a research vessel
4.3 Commercial catches as samples of the population

4.3.1 Indexes of abundance

Example 4.3.1.1
Example 4.3.1.2
Example 4.3.1.3

4.4 Composition of the stock

4.4.1 Fishing by more than one fleet

Example 4.4.1.1
Example 4.4.1.2

4.4.2 Age-length keys

Example 4.4.2.1

BIBLIOGRAPHY