Life: The Science of Biology
Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 54.1, Problem 4R
Summary Introduction

To explain:

The method used by researcher to determine the population sizes of leopard frog after metamorphosis of some of the tadpoles.

Given:

A researcher wants to count the leopard frog tadpoles present in a pond in the spring. Later, after the tadpoles have metamorphosed, she wants to compare this number with the size of frog population.

Introduction:

Frogs are mobile organisms whose counting is a very tedious process. In most of the cases, mobile organisms move out of the marked area and in other cases, the other organisms enter into the marked area from elsewhere. In the given case, researcher can use mark-recapture method to investigate the population size of leopard frog.

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Which of the lab field techniques would you use to answer each of the following questions? Answer choices on bottom A-E.   What is the population size of Black Bears in New Jersey?   What is the dominate tree species in the forest on campus?   How many species of birds are found within five miles of my home?   Are the Beech trees in the forest on campus producing enough offspring to replace themselves?   What is the density of dandelions in the lawn?   Is the population of warblers in Scotland Run park in decline? A. Daubenmire plots B. BBS C. Mark/Recapture D. Point Centered Quarter E. Life Table Analysis
For each organism, create a survivorship curve by plotting the given information in a line graph. Title each graph "Survivorship Curve for [name of organism]." The y-axis should be labeled "Survivorship" and contain low, medium, and high indicators. The x-axis should be labeled "Life Span" and contain young, middle-aged, and old indicators. American toads practice explosive reproduction. During the first warm days in spring, both males and females migrate from forests and converge on ponds. Reproduction is quick, taking only a few days. Females lay hundreds of eggs in jelly-filled sacks along the sides of the pond or stream. As soon as the eggs are laid, males and females abruptly leave the pond. Even before they hatch, the offspring are prone to high rates of predation. Many offspring die before they reach adulthood. Of the offspring that do survive, some will die in adulthood, and some will live their entire natural life span.
In a habitat there are 7,500 individuals of P. rufipes, 40% of which have long and thin ovipositors and 60% have short and thick ovipositors. During a single year 250 wasps with long and thin ovipositors died while 325 were born. In that same year, 650 wasps with short, thick ovipositors were born and 800 died. Calculate the per capita growth rate (r) of the two subpopulations of P. rufipes. Per capita growth rate of P. rufipes with long and thin ovipositors: _________ Per capita growth rate of P. rufipes with short and thin ovipositors: _________
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