Introduction to distance sampling

Created from Youtube video: https://www.youtube.com/watch?v=2kc4cU-iG1Uvideo

Concepts covered:distance sampling, wildlife population assessment, plot sampling, population trends, sampling techniques

The video introduces distance sampling as a method for estimating wildlife populations, differentiating it from plot sampling and discussing its application in wildlife population assessment. It explains the importance of understanding population trends and the challenges of various estimation methods, emphasizing the need for accurate and representative sampling techniques.

Table of Contents1.Introduction to Distance Sampling in Wildlife Population Assessment 2.Estimating Population Size: Plot and Distance Sampling Methods 3.Estimating Population Size Using Plot Sampling and Strip Transects

chapter

Introduction to Distance Sampling in Wildlife Population Assessment

Concepts covered:distance sampling, wildlife population assessment, plot sampling, population trends, future projections

Eric Rexed introduces the fundamentals of distance sampling, a method used for estimating wildlife populations. He explains its relationship to wildlife population assessment, differentiates it from plot sampling, and discusses its application in understanding population trends and making future projections.

Question 1

Distance sampling is used for estimating animal populations.

Question 2

What is the primary use of distance sampling?

Question 3

How are questionnaires used in wildlife studies?

Question 4

CASE STUDY: A wildlife manager in the UK wants to estimate the population of otters in a specific region. They have decided to use distance sampling to achieve this.

All of the following are correct applications of distance sampling except:

Question 5

CASE STUDY: A wildlife biologist is using distance sampling to estimate the number of deer in a forest. They need to differentiate it from plot sampling.

Select three correct differences between distance and plot sampling:

chapter

Estimating Population Size: Plot and Distance Sampling Methods

Concepts covered:plot sampling, distance sampling, population density, abundance estimation, census methods

The chapter discusses various methods for estimating population size when a complete census is not feasible. It focuses on plot sampling and distance sampling, explaining how these methods can be used to derive estimates of animal density and abundance, while also highlighting the challenges and assumptions involved in these techniques.

Question 6

Population density is individuals divided by study area size.

Question 7

How is population size estimated in mark-recapture?

Question 8

What is a key advantage of alternative sampling methods?

Question 9

CASE STUDY: A team of ecologists is using distance sampling to estimate the population of birds in a forest. They measure the distance of each bird sighting from a line transect.

All of the following are steps in distance sampling except:

Question 10

CASE STUDY: A conservation group is assessing the trend of a declining wolf population over time. They use various sampling methods to estimate population size each year.

Select three correct considerations for trend assessment:

chapter

Estimating Population Size Using Plot Sampling and Strip Transects

Concepts covered:plot sampling, strip transects, population estimation, study area, extrapolation

The chapter explains the method of estimating population size using plot sampling, specifically through strip transects. It details the process of calculating the area covered, counting individuals within sampled plots, and extrapolating these counts to estimate the total population in the study area.

Question 11

Plot sampling assumes all animals in plots are counted.

Question 12

What is the purpose of plot sampling?

Question 13

How do you estimate density using plot sampling?

Question 14

CASE STUDY: You are conducting a wildlife survey in a forest. You have divided the forest into 10 equal plots, each measuring 100 units from north to south. You sampled 3 plots and counted 45 animals.

All of the following are correct applications of plot sampling except...

Question 15

CASE STUDY: You are estimating the population of a fish species in a lake. You divided the lake into 5 plots, each 400 units long. You sampled 2 plots and counted 50 fish.

Select three correct applications of plot sampling.

Create your own quiz for this video

Would you like to create and run this quiz?

yesno

Created with Kwizie