1. Examine the food webs for Lake Victoria, East Africa (fig 31.2 a,b) before and after the of the Nile perch (Leveque 1995). Calculate the mean food chain length, p introduction
1. Examine the food webs for Lake Victoria, East Africa (fig 31.2 a,b) before and after the of the Nile perch (Leveque 1995). Calculate the mean food chain length, p introduction
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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
Transcribed Image Text:Oreochromis
Juvenile
Lates
Chironomids
Man
Lates
Caridina
Nilotica
Detritus/Phytoplankton
Lake Victoria 1989
Figure 31.2. (continued)
(b) Food web structure of Lake Victoria after introduction of the Nile Perch, Modified from Leveque (1995).
Rastrineobola
argentea
Zooplankton

Transcribed Image Text:1. Examine the food webs for Lake Victoria, East Africa (fig 31.2 a,b) before and after the
introduction of the Nile perch (Leveque 1995). Calculate the mean food chain length, percent of
trophic groups at various levels, and connectance for each food web.
Oreochromis
Insectivorous
Fish
Chironomids
Chaoborous
Man
Piscivorous
Fish
Zooplanktivorous
Haplochromines
Rastrineobola
Zooplankton
Detritus/Phytoplankton
Lake Victoria in the 1970s
Detritivorous
Phytoplanktivorous
Haplochromines
Figure 31.2.
(a) Food web structure of Lake Victoria before introduction of the Nile Perch. [continued on next page)
Molluscivorous
Fish
Molluscs
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