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Isle Royale Overview


bob joe

on 27 April 2010

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Transcript of Isle Royale Overview

When did Isle Royale become a National Park? 1931 When did the glaciers retreat?
8,000 years ago. When did Native Americans mine copper on Isle Royal? 3,000 years ago. Where is Isle Royale located?
In the northwest portion of Lake Superior. How long and wide is it? 50 miles long and 8 miles wide. When was the bedrock formed supporting Isle Royale formed? 1 billion years ago. When did the moose arrive on the island? About 1900. How did they get there? They swam. How much do moose eat a day? 40 lbs per day. What is a moose’s maximum life span? 17 years. What is the average life span? 9 years. What percent body weight increase do moose put on preparing for winter? 25% What climate conditions favor tick populations? Winter. Wolves weight is how much at birth? No more than a can of pop. what do pups eat? Their mother's milk. how old are pups when they typically leave the pack? When they're 12 months old. Who is in charge of the pack? The alpha dog. How many miles a day/year do wolves walk? 4,000 miles a year. 2 to 3 miles per day. How do wolves mark their territory? They pee on stuff. Wolves will attack only __1__ of every 10 moose they chase. Wolves will kill every ___8___ or ___9___ of every 10 moose they attack. Wolves will attack what parts of the moose? The hind quarters, and the nose. How many olfactory receptors does a wolf have? 280 million. 1.Of the wolves that survive their first six to nine months, most are dead by __3____or __4___years of age. 1. Every year, one in ___4___ or __5____ adult wolves dies in a healthy wolf population. The 2 causes of wolf death are primarily, lack of food and fighting other wolves for food. What ones show deformities in wolves? Back pain What is causing the deformities? Inbreeding. How many pounds a day can a raven eat? 2 lbs. 1. Does a large or small wolf pack have an advantage over scavengers? A large pack.
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