COSEWIC assessment and status report on the sei whale

0,69

MB

Balaenoptera borealis in Canada

33

stron

4835

ID

Committee on the Status of Endangered Wildlife in Canada

2003

rok

TABLE OF CONTENTS

SPECIES INFORMATION.4

Name and classification.4

Description.4

DISTRIBUTION.5

Global range and stock structure.5

Canadian range .7

HABITAT 9

Habitat requirements .9

Trends . 10

Habitat protection/ownership .10

BIOLOGY10

Reproduction .10

Survival10

Species characteristics and physiology . 11

Migration12

Diet composition 12

Foraging 13

Interspecific interactions 14

Adaptability 15

POPULATION SIZES AND TRENDS 15

LIMITING FACTORS AND THREATS 16

SPECIAL SIGNIFICANCE OF THE SPECIES 18

EXISTING PROTECTION OR OTHER STATUS 18

SUMMARY OF STATUS REPORT.19

TECHNICAL SUMMARY.21

TECHNICAL SUMMARY.22

ACKNOWLEDGEMENTS . 23

LITERATURE CITED 23

BIOGRAPHICAL SUMMARY OF CONTRACTOR27

AUTHORITIES CONSULTED.27

COLLECTIONS EXAMINED . 27