Catalog Search Results
7) Orcas
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Simple text and full-color photographs provide a brief introduction to orcas.
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Many marine mammals are harmed or critically injured by our trash in the oceans. Jalena found one place that's on a mission to save these creatures. The Marine Mammal Center in Northern California rescues seals, sea lions, porpoises, and other injured or sick mammals. Thanks to the dedication of hundreds of volunteers, they are healed, cured, rehabilitated, and returned to their native habitat. Some of the volunteers are concerned teens. Ever wonder...
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A classroom favorite, this book provides a first glimpse of marine mammals that's ideal for budding oceanographers!
In this beginner's guide, author and educator Cathryn Sill simply and clearly shows children what is essential for understanding and appreciating marine mammals—how they look, how they move, what they eat, and where they live. She covers animals as diverse as whales and otters to dolphins, polar bears, and more.
The...
In this beginner's guide, author and educator Cathryn Sill simply and clearly shows children what is essential for understanding and appreciating marine mammals—how they look, how they move, what they eat, and where they live. She covers animals as diverse as whales and otters to dolphins, polar bears, and more.
The...
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The waters of the Arctic and Antarctica teem with a remarkable number of marine mammals. Get an overview of the mammalian wildlife that inhabits or migrates to polar waters, including white beluga whales, leopard seals, crabeater seals, and walruses. Examine the sophisticated social structure of orcas, also known as killer whales, and why it makes them such effective predators.
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Within their own species, marine mammals have developed sophisticated communication. In captivity, we know they can be trained to learn rules, which indicates higher cognitive function. And even in the wild, we have documented some extraordinary instances of learning and cultural transmission of information. But is their intelligence comparable to our own?
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Through tens of millions of years, evolution has resulted in a fascinating array of marine mammal adaptations. With the ability to process thousands of gallons of water each day or dive to a depth of almost three kilometers, and with numerous methods of locomotion or extraordinary social behaviors, these whales, porpoises, phocids, and more can thrive in varied environments around the globe.
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From individual whales that corral their confused prey to highly coordinated bubble-net feeding and aunts who "babysit," marine mammals have developed an extraordinary variety of social and hunting behaviors developed over millions of years. If the energy expenditure does not support the goal of passing on genetic material, natural selection will eventually drop the adaptation.
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Two things are clear: Almost all marine food webs are based on microscopic photosynthesizers, and only a small fraction of the energy available at any trophic level becomes available to the next level. Adaptations such as baleen, ventral pleats, and unique tooth morphology allows these large animals to meet their energy needs.
16) Whale
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Description
Describes whales, dolphins, seals, and other marine mammals, their habitats, means of communication, and family life.