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Experimental Site 1 Information River Site: Deep pool Number and Type of Predators: 30 rivulus, 30 blue acara, 30 pike cichlid Guppy Total Population: 210 Number of Generations: 10 Number of Weeks: 286 Data Collected Brightest Bright Drab Drabbest Number of Guppies 11 25 170 Percent of Population (rounded) 2% 5%

Experimental Site 1 Information River Site: Deep pool Number and Type of Predators: 30 rivulus, 30 blue acara, 30 pike cichlid Guppy Total Population: 210 Number of Generations: 10 Number of Weeks: 286 Data Collected Brightest Bright Drab Drabbest Number of Guppies 11 25 170 Percent of Population (rounded) 2% 5%

Biology Today and Tomorrow without Physiology (MindTap Course List)
Biology Today and Tomorrow without Physiology (MindTap Course List)
5th Edition
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Christine Evers, Lisa Starr
Chapter12: Processes Of Evolution
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Determine The percent of population of drop guppies
The Flashy Guppy Data Analysis Endler's Research When evolutionary biologist John Endler began studying Trinidad's wild guppies in the 1970's, he was struck by the wide variation among guppies from different streams, even among guppies living in different parts of the same stream. Males from one pool sported vivid blue and orange splotches along their sides, while those farther downstream carried only modest dots of color near their tails. Endler also observed differences in the distribution of guppy predators, and in the color and size of gravel in different stream locations. Endler photographed hundreds of guppies and carefully collected data about their size, color, and the size and placement of their spots. He began to see a strong correlation between where guppies lived in a particular stream and whether the fish were bright or drab. But what was responsible for these trends in coloration? And if bright colors made guppies more conspicuous to predators, why should males be colorful at all? To find out, Endler formed a hypothesis based on his observations, and then set out to test it. His results proved to be one of evolutionary biology's most important discoveries. The Flashy Guppy Data Analysis Guppy Habitat Types Guppies usually occupy the entire length of Trinidad's Aripo River, and often so do their predators, such as pike cichlids, blue acara, and rivulus. However, different sections of the river offer unique environmental characteristics and pressures that may influence the color variation seen in the guppies (see the table). Sign out Lenovo
Transcribed Image Text:The Flashy Guppy Data Analysis Endler's Research When evolutionary biologist John Endler began studying Trinidad's wild guppies in the 1970's, he was struck by the wide variation among guppies from different streams, even among guppies living in different parts of the same stream. Males from one pool sported vivid blue and orange splotches along their sides, while those farther downstream carried only modest dots of color near their tails. Endler also observed differences in the distribution of guppy predators, and in the color and size of gravel in different stream locations. Endler photographed hundreds of guppies and carefully collected data about their size, color, and the size and placement of their spots. He began to see a strong correlation between where guppies lived in a particular stream and whether the fish were bright or drab. But what was responsible for these trends in coloration? And if bright colors made guppies more conspicuous to predators, why should males be colorful at all? To find out, Endler formed a hypothesis based on his observations, and then set out to test it. His results proved to be one of evolutionary biology's most important discoveries. The Flashy Guppy Data Analysis Guppy Habitat Types Guppies usually occupy the entire length of Trinidad's Aripo River, and often so do their predators, such as pike cichlids, blue acara, and rivulus. However, different sections of the river offer unique environmental characteristics and pressures that may influence the color variation seen in the guppies (see the table). Sign out Lenovo
arks Determine the percent population of drab guppies at Experimental Site 1. (NO UNITS) Experimental Site 1 Information River Site: Deep pool Number and Type of Predators: 30 rivulus, 30 blue acara, 30 pike cichlid Guppy Total Population: 210 Number of Generations: 10 Number of Weeks: 286 Data Collected Brightest Bright Drab Drabbest Number of 11 25 170 Guppies Percent of Population (rounded) 2% 5% M
Transcribed Image Text:arks Determine the percent population of drab guppies at Experimental Site 1. (NO UNITS) Experimental Site 1 Information River Site: Deep pool Number and Type of Predators: 30 rivulus, 30 blue acara, 30 pike cichlid Guppy Total Population: 210 Number of Generations: 10 Number of Weeks: 286 Data Collected Brightest Bright Drab Drabbest Number of 11 25 170 Guppies Percent of Population (rounded) 2% 5% M
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