Aquaculture: The Ecological Issues (Ecological Issues Series)

Book Description

Aquaculture is a fast-growing, essential industry that provides food and income to millions of people. It offers the only prospect of expanding food supply from freshwater or sea because capture fisheries have reached their limits. However, many features of aquaculture as currently practiced are ecologically unsustainable.Aquaculture: the ecological issues is written by an international team of researchers. Their aim has been to give an accessible account of the scale and diversity of aquaculture and the impact that it has on habitats and ecosystems throughout the world. It deals with the culture of carp and oysters, catfish and crayfish, salmon and tiger prawns.Controversial topics such as habitat loss, the introduction of alien species, genetic pollution by escapees from fish farms and spread of disease from farmed to wild populations are covered. Attention is drawn to the heavy reliance of the industry on fishmeal and fish oil derived from industrial fishing that in turn impacts on the food supply of seabirds and fish such as cod and haddock. Aquaculture generates wastes and uses antibiotics and other drugs to stave off disease.The authors show how effects of these problems have been ameliorated and look to a future where improved technology, better regulation and integrated resource management can combine to make the industry more sustainable.

Commercial Fishing: The Wider Ecological Impacts (Ecological Issues)

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Commercial Fishing: The Wider Ecological Impacts (Ecological Issues)
Simon Jennings
Manufacturer: Blackwell Publishing Limited
ProductGroup: Book
Binding: Paperback

Environmental & Natural Resources Law | Law | Subjects | Books

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ASIN: 0632056088

Book Description

Fishing provides food, income and employment for millions of people. However, fishing has environmental costs that threaten rare species, marine ecosystems and the sustainability of the resource.Based on the research expertise of leading scientists, Commercial fishing: the wider ecological impacts provides a lively, timely and accessible account of fishing activities and their impacts on marine habitats, biodiversity and species of conservation concern. It covers fishing methods that range from trawling in the Antarctic to fishing with dynamite in the tropics.The authors show how habitats such as the muddy sea beds of the deep sea, kelp forests and coral reefs are affected by fishing and how birds, mammals, turtles and sea snakes both suffer and benefit from fishing activities. They also look to the future, highlighting ways to make fishing gears 'environmentally friendly' and asking whether marine reserves will improve conservation.

The Effects of Fishing on Non-Target Species and Habitats: Biological, Conservation and Socio-Economic Issues ("Fishing News" Books)

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The Effects of Fishing on Non-Target Species and Habitats: Biological, Conservation and Socio-Economic Issues ("Fishing News" Books)
Sebastiaan J. Degroot
Manufacturer: Blackwell Publishing Limited
ProductGroup: Book
Binding: Hardcover

General | Nature & Ecology | Science | Subjects | Books

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ASIN: 0632053550

Book Description

Fishing is a major form of ecological disturbance to marine communities throughout the world. In the past, fisheries biologists have concentrated on the studying of the direct effects of fishing on stocks of target species and understanding the processes of recruitment. There is now a growing appreciation of the ecological implications of the wider effects of fishing activities on marine organisms and their habitats. Contributions include articles that consider the physical effects of fishing gears on the seabed; distribution of, and trends in fishing effort; ecological effects on benthic fauna; long-term community changes; the effects of food subsidies in the marine environment; interactions between fisheries and marine mammals; technical measures to reduce impacts of fisheries; conservation issues and priorities; socio-economic implications of wider fisheries impacts.

Bivalve aquaculture and exotic species: a review of ecological considerations and management issues.: An article from: Journal of Shellfish Research

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Bivalve aquaculture and exotic species: a review of ecological considerations and management issues.: An article from: Journal of Shellfish Research
Christopher W. McKindsey , Thomas Landry , Francis X. O'beirn , and Ian M. Davies
Manufacturer: Thomson Gale
ProductGroup: Book
Binding: Digital
ASIN: B000W7YWGO
Release Date: 2007-09-19

Book Description

This digital document is an article from Journal of Shellfish Research, published by Thomson Gale on August 1, 2007. The length of the article is 15399 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: Bivalve aquaculture and exotic species: a review of ecological considerations and management issues.
Author: Christopher W. McKindsey
Publication: Journal of Shellfish Research (Magazine/Journal)
Date: August 1, 2007
Publisher: Thomson Gale
Volume: 26 Issue: 2 Page: 281(14)

Distributed by Thomson Gale

Needs and issues in the Taunton Bay Region: A survey of residents from Franklin, Hancock, and Sullivan, Maine (MSG-E)

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Needs and issues in the Taunton Bay Region: A survey of residents from Franklin, Hancock, and Sullivan, Maine (MSG-E)
Tracy Hart
Manufacturer: Maine Sea Grant Program
ProductGroup: Book
Binding: Unknown Binding

Tidelands | Ecosystems | Outdoors & Nature | Subjects | Books
ASIN: B0006SBI66

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A Real-Science Time Travel Plan!

How to build a quick tour of physical theories.

A Very Interesting Book

A Really Interesting Book

SPACEFOAM AND WORMHOLES ARE FUN

How to Build a Time Machine
Paul Davies
Manufacturer: Penguin (Non-Classics)
ProductGroup: Book
Binding: Paperback

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Similar Items:

Time Travel in Einstein's Universe: The Physical Possibilities of Travel Through Time

Breaking the Time Barrier: The Race to Build the First Time Machine

About Time: Einstein's Unfinished Revolution

The Time Travel Handbook: A Manual of Practice Teleportation & Time Travel

Time: A Traveler's Guide

ASIN: 0142001864
Release Date: 2003-03-25

Book Description

With his unique knack for making cutting-edge theoretical science effortlessly accessible, world-renowned physicist Paul Davies now tackles an issue that has boggled minds for centuries: Is time travel possible? The answer, insists Davies, is definitely yes-once you iron out a few kinks in the space-time continuum. With tongue placed firmly in cheek, Davies explains the theoretical physics that make visiting the future and revisiting the past possible, then proceeds to lay out a four-stage process for assembling a time machine and making it work. Wildly inventive and theoretically sound, How to Build a Time Machine is creative science at its best--illuminating, entertaining, and thought provoking.

Customer Reviews:

A Real-Science Time Travel Plan!.......2006-07-25

I have read other books by Paul Davies, and found this one as enlightening, entertaining and challenging as previous ones. This is serious science, not science fiction. Davies outlines in a very readable style, with good diagrams and humorous illustrations, the current thinking in Quantum Physics concerning the concept of time.

He discusses the mechanical and mathematical possibilities of moving between points in times, reflecting on principles and implications in the Theory of Relativity. He discusses worm holes and how to create and control them, using anti-gravity, negative energy and time dilation.

He goes through the known steps necessary to create a time dilation by connecting one point of time in relation to a certain spatial location to different time conditions in another spatial location. This involves, of course, reflections on light speed and the physical and practical limitations involved in the state of the universes as we know it.

This is fascinating reading, with both feet planted firmly on terra firma, but with the mind probing the depths and breadths of existence and possibilities within the laws of physics! Stimulating!

How to build a quick tour of physical theories........2004-06-30

Well, I hate to ruin it for you, but Davies isn't really telling the reader "how to build a time machine" so much as he is taking advantage of a gee-whiz slice of science fiction fun to build a quick tour of the fundamental theories of modern physics.
"So can it really be done?" asks Davies, one of the most frequently cited mathematical physicists of our day. And away we go, flying through the ideas of Newton, Einstein, Gödel, Hawking, and Penrose, and leaping into wormholes in space-time. As we go, the great modern physical theories come into play one after another. Davies is good at this. Quickly treated are singularities, entropy and the arrow of time, the special and general theories of relativity, exotic matter, antigravity, the topology of space-time, quantum uncertainty, and other stuff including a bevy of time-travel paradoxes.
To be sure, the author describes time machines that 'might' work. "So can it really be done?" Again, I don't want to ruin it for you. But some reviewers seem to have come up with the wrong answer. Here's a hint, "The purpose of science is to provide a consistent picture of reality, so if a scientific theory produces genuinely paradoxical (rather that merely weird or counterintuitive) predictions, that is a very good reason for rejecting the theory" (p 123). This isn't going to be remembered as one of Davies more important books (I recommend 'The Mind of God' and 'The Matter Myth'), but this is aimed at a different audience/readership.
A fun little book.

A Very Interesting Book.......2004-03-11

This book is about all the different theories of time travel. It also tells different ways that time machines "could" be made but they are highly unlikely.

Paul Davies is Professor of Natural Philosophy in the Australian Centre for Astrobiology at Macquarie University. Davies is interested in the nature of time, high-energy particle physics, the foundations of quantum mechanics, the origin of life and the nature of consciousness. Davies is well known as an author, broadcaster and public lecturer. Paul writes regularly for newspapers, journals and magazines in several countries, both about science and the political and social aspects of science and technology. In 1991 Davies won the ABC Eureka Prize for the promotion of science in Australia. In 1992 he won the University of New South Wales Press Eureka Prize for his book The Mind of God, and in 1993 he was presented with an Advance Australia Award for outstanding contributions to science.

This book turned out a lot different than I thought, but I really liked it. A friend gave me the book to read and he liked it also. The book is about all the different theories of time travel and possible ways that you could make a time machine. This book was interesting, a little hard to understand, but it was never boring. I thought that this book was going to be more of a story but it turned out being an informational book about time travel. I actually did learn a lot about traveling through time and all the different theories that people like Einstein had. It also proved why time travel wouldn't be possible because of the size that the time machine would have to be. This book was a good length; it wasn't to long but it explained things enough for you to

A Really Interesting Book.......2004-03-11

This book is about all the different theories of time travel. It also tells different ways that time machines "could" be made but they are highly unlikely.

SPACEFOAM AND WORMHOLES ARE FUN.......2004-02-28

An inventive little book, artfully designed and compactly
arranged into short sections, HOW TO BUILD A TIME MACHINE
explains the basic theories of time travel and then explores
what means are required to achieve it. Paul Davies makes the
strongest and, it would seem, irrefutable case for time travel
into the future. But such "travel," based on Einstein's special
theory of relativity, which distinguishes a "time-dilation
factor" between two bodies moving at different speeds, is more
like an exchange of times: a spaceship leaves Earth and
approaches the speed of light; then it returns and the crew find
that Earth has aged seven times faster than they have. They
have avoided the standard speed of time on Earth, but still have
aged by their spaceship time. Arriving, say, a hundred years
"in the future," they resume their normal rate of aging on
Earth, having turned themselves into visitors (or relics) from
the past. But they have not escaped time.

The big question is whether they can go back--back to the year
of their departure. Davies thinks they can. The best of
conceivable methods, he determines, is the wormhole, a
theoretical entity that links one space/time in the universe
with another. Somehow he imagines that it could be managed by
human beings on Earth who want to travel from the present into
the past. He doesn't trouble much over such questions as where
one end of a natural wormhole would be, where the other, how
people would get to one, and where the hell would they be when
they came out the other, but rather embarks with great gusto
on drawing up plans for building a serviceable wormhole
right at home.

Sliding cheerfully through "spacetime foam," "antigravity," "the
chronology horizon" and other such slippery concepts, he finally
focuses on the project of opening up the throat of his wormhole
in the interstices of space and keeping it open so that anyone
who enters it is not instantly "spaghettified" by a crushing
singularity. How this project differs from counting the number
of angels on the head of a pin is obvious: it is much more dif-
ficult and much more scientific. Davies pursues it in good
humor, and to his credit does not avoid the mechanical
difficulties. To open a wormhole, he calculates, you would need
either an accelerator as large as the solar system or so much
"negative energy" that it would take more time than the age of
the universe to produce it. No matter, he concludes, science
will get better and the job will someday get done.

So much optimism, such high spirits! You can't dislike this
book! Sober reasoning, of course, reminds you that time is not
a thing that you can visit, like walking forward toward a
mountain or back toward town. Time is the relationship between
things that change. And so if you want to go back to things in
a previous state, all those things would have to reverse their
accrued changes simultaneously: water would rush back upstream,
corpses would rise out up of the ground, buildings would be
unbuilt. But Davies and other theorists of time travel do not
have such a past in mind. Rather, they assume that there is a
historical continuum, a sort of museum of history that preserves
every change in the universe in a long static hallway, and the
successful time traveller will be able to go back and visit any
room he chooses. How you get from our changing world to the
fixed continuum, historical museum or alternate universe is a
problem they never consider, because such a past does not exist.
And so they prefer to play with intellectual games like "the
twins paradox," "the mother paradox," and so on; even Stephen
Hawking indulges in them. Final verdict: If you want to take
pleasure in wormholes, go ahead: this is the perfect book.
It's when the scientists start to request millions of dollars to
build them that we should draw the line.

Average customer rating:

Such a cool book!

How To Build a Time Machine (How To¿)
Hazel Richardson
Manufacturer: Franklin Watts
ProductGroup: Book
Binding: Paperback

Almanacs | Almanacs & Yearbooks | Reference | Subjects | Books
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ASIN: 0531139999

Customer Reviews:

Such a cool book!.......2003-10-01

This is a brilliant book - funny, clear, interesting. It's packed with the history of time and physics, and explains quantum physics in a way anybody can understand. The inner workings of a black hole, what a wormhole is, and time travel paradoxes are all explained. The illustrations are great (and often very funny).I'd definitely recommend it for adults as well as children.

Average customer rating:

A GREAT book
Easy to read & understand

How to Build a Time Machine
Paul Davies
Manufacturer: Allen Lane
ProductGroup: Book
Binding: Hardcover

General | Science | Subjects | Books

General | Physics | Science | Subjects | Books

Relativity | Physics | Science | Subjects | Books
ASIN: 0713995831

Customer Reviews:

A GREAT book.......2007-01-31

This was my first book on relativity and quantum mechanics. I read it in sixth grade, and had no trouble whatsoever understanding it. I have recommended it to many of my friend, all of whom enjoyed it. This book tackles some of the REALLY weird physics, and does it in simple, nonbigwordable way that the layman can understand. No equations, pictures and illistrations instead. A great introduction for the newbie.
-Emmsey Squire

Easy to read & understand.......2004-09-10

I highly recommend this book because the content is so interesting and easy to read. The author explains such difficult subject in an easy manner. It's very suitable for those who have little science background.

Days of the future past.(Book Review) (book review): An article from: Skeptic (Altadena, CA)

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Days of the future past.(Book Review) (book review): An article from: Skeptic (Altadena, CA)
Ted Dace
Manufacturer: Skeptics Society & Skeptic Magazine
ProductGroup: Book
Binding: Digital

General | Philosophy | Nonfiction | Subjects | Books

Book Description

This digital document is an article from Skeptic (Altadena, CA), published by Skeptics Society & Skeptic Magazine on March 22, 2003. The length of the article is 1602 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: Days of the future past.(Book Review) (book review)
Author: Ted Dace
Publication: Skeptic (Altadena, CA) (Refereed)
Date: March 22, 2003
Publisher: Skeptics Society & Skeptic Magazine
Volume: 10 Issue: 1 Page: 74(3)

Article Type: Book Review

Distributed by Thomson Gale

How to Build a Time Machine: Scientific American (Unabridged)

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How to Build a Time Machine: Scientific American (Unabridged)
Paul Davies
Manufacturer: audible.com
ProductGroup: Book
Binding: Audio Download
ASIN: B000O3GYFI

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How to Build a Time Machine
Paul Davies
Manufacturer: Penguin (Non-Classics)
ProductGroup: Book
Binding: Paperback
ASIN: B000OJ4PBC

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How to Build a Time Machine Poster Kit
Paul Davies
Manufacturer: Allen Lane
ProductGroup: Book
Binding: Unknown Binding
ASIN: 0149037384

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