Elephants with large tusks are targeted by poachers, who sell the tusks on the ivory market. Teachers, scroll down for a quick list of key resources in our Teachers Toolkit. Developing an Explanation for Tuskless Elephants Natural Selection Published November 2018 Page 3 of 6 Activity Educator Materials ANSWER KEY Task I: Information Gathering 1. Natural Selection Published October 2018 www.BioInteractive.org Page 3 of 6 Activity Student Handout Video Activity 7. Among the younger females, who were born after this period of heavy poaching, 33% are tuskless.

Elephant tusks are important for obtaining food and water, and essential to male elephants for competing for mates, so one might expect strong natural selection for having tusks. When compared to the elephant populations across Africa, the frequency of tuskless elephants is only 6%. Draw an arrow pointing to Mozambique on the map.What happened in Mozambique between 1977 and 1992? The “unnatural selection” pressure of hunting and war creates circumstances in which tuskless elephants are more likely to survive, breed, and pass on the genes for missing lateral incisors in regions where intense hunting or poaching has occurred. Look up the definition of the term poaching and summarize your understanding of what it means in the space below. (2:19)What are tusks?

(3:12)What percentage of females are typically tuskless in an elephant population less affected by poaching?About 2% to 6% of the female elephants are typically tuskless. Which individuals in a population are most likely to survive and reproduce. the growing rate of tussles elephants in Uganda is an example. In Gorongosa National… Elephants with large tusks are targeted by poachers, who sell the tusks on the ivory market. WriteHow many adult males without tusks have been found in Gorongosa National Park?Temple University Fox School of Business ‘17, Course Hero Intern Male elephants also use theirWhat would probably happen to a male elephant that doesn’t have tusks?The male could be severely wounded while fighting other males for access to females. They noticed that while all the males have tusks, about 50% of the females in the park that are over the age of 20 years do not have tusks. But the proportion of tuskless elephants has increased in some populations.In this video, Poole explains a possible reason. genes get passes on. (1:00)What is unusual about the elephant populations found in Gorongosa now?A high proportion of the female elephants in Gorongosa are tuskless. After the discussion, students watch the HHMI film “Selection for Tuskless Elephants” which is about 7 minutes long. why are tussles elephants becoming more likely to reproduce than ones with tusks. What does natural selection explain about a population. This video follows Joyce Poole and other scientists working in Gorongosa National Park, Mozambique, who made the striking observation that many female elephants lack tusks.Most African elephants have tusks, but some — about 2% to 6% of females and even fewer males — never grow them. In Gorongosa National Park, Poole found that among the older female elephants that survived a period of heavy poaching in the park, over 50% are tuskless. Analyzing Data on Tuskless Elephants. SCIENCE Tuskless elephants may be a response to the selective pressure of poaching. Teaching an Online Introductory Biology Lab Using Evolution and Ecology Resources how it changes in response to its environment . Grade Level: 8-12 Time Required: 35-45 … The video discusses how the frequency of certain traits in a population can change depending on the selective pressure and provides a possible example of natural selection driven by human activity.Africa, adaptation, Gorongosa, microevolution, scientific methodology, scientific process, selective pressure, traitThis resource complies with accessibility standards in accordance with the final rule for Section 508 of the National Rehabilitation Act.Hear how educators are using BioInteractive content in their teaching. How did this event affect the size ofThere was a civil war, during which 90% of Gorongosa’s elephant population was killed. Poaching is selecting for tuskless elephants, which are more likely to survive, mate, and pass on their genes. Watch the Selection for Tuskless Elephants video until time 1:46 and answer the following questions. Poaching is selecting for tuskless elephants, which are more likely to survive, mate, and pass on their genes. Discussion Ideas Most African elephants have tusks.

(Nautilus) Learn more about the natural and unnatural history of the African elephant with our video study guide.

Natural Selection Lab Activity - Data Analysis of Tuskless Elephants (1).pdfWeek 4 assignment Evolution skin color and Tuskless Elephants (1).docxCourse Hero is not sponsored or endorsed by any college or university.Stuck? (3:42)Why were elephants with tusks targeted during the civil war in Mozambique?Soldiers killed elephants for their ivory, which was sold to buy arms and ammunition. (4:06)What percentage of female elephants were tuskless in Gorongosa according to Poole’s surveys? In Gorongosa National Park, Poole found that among the older female elephants that survived a period of heavy poaching in the park, over 50% are tuskless.

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