The Geophysical Institute at the University of Alaska Fairbanks offers the full text of the February 15, 2001 article entitled "Bowhead Whales May Be the World's Oldest Mammals," written by Ned Rozell. The university presents the article as part of the Alaska Science Forum. Rozell discusses various methods of determining the ages of bowhead whales. Some stone harpoons, believed to be at least one hundred years old, have been found in bowhead whales.
Bowhead whales are amazing creatures that often live lives longer than humans! These whales live in Arctic waters near the North Pole, smashing through thick ice to reach the surface to breathe. Using their baleen, these large mammals feed on tiny animals swimming in the cold waters, while thick blubber keeps them warm in frigid temperatures. Readers explore their everyday lives using the latest scientific research about these long-living animals, and colorful photographs show these gigantic creatures and their unique features up close and personal.
determined by an inability to move in response to touch. C. elegans develop through four larval stages following hatching and prior to adulthood. Adult C. elegans are reproductive for about the rst week of adulthood followed by approximately two weeks of post-reproductive adulthood prior to death. Life span is most commonly measured in the laboratory by maintaining the worms on the surface of a nutrie- agar medium (Nematode Growth Medium, NGM) with E. coli OP50 as the bacterial food source (REF). Alternative culture conditions have been described in liquid media; however, these are not widely used for longevity studies. Longevity of the commonly used wild type C. elegans hermaphrodite (N2) varies ? from 16 to 23 days under standard laboratory conditions (20 C, NGM agar, E. coli OP50 food source). Life span can be increased by maintaining animals at lower ambient temperatures and shortened by raising the ambient temperature. Use of a killed bacterial food source, rather than live E. coli, increases lifespan by 2–4 days, and growth of adult animals in the absence of bacteria (axenic growth or bac- rial deprivation) increases median life span to 32–38 days [3, 23, 24]. Under both standard laboratory conditions and bacterial deprivation conditions, wild-derived C. elegans hermaphrodites exhibit longevity comparable to N2 animals [25].
An easy-to-navigate guide to Herman Melville's epic American novel, Dive Deeper consists of 135 brief chapters, along with Etymology, Extracts, and Epilogue, each keyed to a phrase, issue, image, sensibility or notion in corresponding chapters of the original.
This book is intended to be a cohesive species account of the bowhead whale. Chapters detail the Bering Sea population, evolutionary relationships and classification, anatomy and physiology, behavior, foods and feeding ecology, reproduction, morbidity and mortality, distribution and movement, population size and dynamics, commercial whaling, subsistence whaling, and the influence of man and his activities.
Whales are among the largest animals on earth. How amazing that a big whale can jump out of the water and fly over the rope at the water park! Readers learn about the many types of whales and how to identify them.
The Bowhead Whale: Balaena mysticetus: Biology and Human Interactions covers bowhead biology from their anatomy and behavior, to conservation, distribution, ecology and evolution. The book also discusses the biological and physical aspects of the Arctic ecosystem in which these whales live, with careful attention paid to the dramatic changes taking place. A special section of the book describes the interactions of humans with bowheads in past and present, focusing on their importance to Indigenous communities and the challenges regarding entanglement in fishing gear, industrial noise and ship strikes. This volume brings together the knowledge of bowheads in one place for easy reference for scientists that study the species, marine mammal biologists, but, equally important, for everyone who is interested in the Arctic. - Presents the only current book dedicated to this species - Includes short, high-impact chapters that make it possible to review all bowhead biology in one compact volume - Illustrated with never-before published photos of bowheads in their natural environment - Provides a platform for an in-depth understanding of indigenous whaling
With coverage on all the marine mammals of the world, authors Jefferson, Webber, and Pitman have created a user-friendly guide to identify marine mammals alive in nature (at sea or on the beach), dead specimens "in hand, and also to identify marine mammals based on features of the skull. This handy guide provides marine biologists and interested lay people with detailed descriptions of diagnostic features, illustrations of external appearance, beautiful photographs, dichotomous keys, and more. Full color illustrations and vivid photographs of every living marine mammal species are incorporated, as well as comprehendible maps showing a range of information. For readers who desire further consultation, authors have included a list of literature references at the end of each species account. For an enhanced understanding of habitation, this guide also includes recognizable geographic forms described separately with colorful paintings and photographs. All of these essential tools provided make Marine Mammals of the World the most detailed and authoritative guide available!* Contains superb photographs of every species of marine mammal for accurate identification * Authors' collective experience adds up to 80 years, and have seen nearly all of the species and distinctive geographic forms described in the guide * Provides the most detailed and anatomically accurate illustrations currently available * Special emphasis is placed on the identification of species in "problem groups, such as the beaked whales, long-beaked oceanic dolphin, and southern fur seals * Includes a detailed list of sources for more information at the back of the book.
This sweeping nonfiction picture book The Whale Who Swam Through Time explores the 200-year lifespan of a bowhead whale and the changing environment that surrounds her. Almost 200 years ago . . . Our journey begins with the birth of a bowhead whale, the longest-living mammal in the world. Over the course of her life in the Arctic, the bowhead whale witnesses many changes: from an era of peace and solitude to one of oil rigs and cruise liners. With gorgeous, detailed, and striking illustrations, this well researched and thoughtfully curated nonfiction story captures the magic and beauty of the natural world, while also providing a thoughtful account of how humans have impacted our changing ecosystems and a call-to-action for protecting the environment. A 2023 OSTB Selected Title
