Science Current Events | Science News | Brightsurf.com
 

Researchers map fish species at risk from dams

May 10, 2012
A worldwide survey finds that all continents save Antarctica have regions where obstruction of rivers is a threat

Dams are believed to be one of the biggest threats to freshwater organisms worldwide: They disrupt normal patterns of water and sediment flow, impede migration, and alter the character of spawning and feeding grounds. A shortage of data has until now prevented a thorough global assessment of the threat dams pose to fish species, but a study described in the June issue of BioScience attempts just that.

The report, by Catherine Reidy Liermann of Umeå University, Sweden, and three coauthors, analyzed 397 ecologically distinct freshwater regions around the world and plotted the occurrence of dams greater than 15 meters high. This approach enabled the researchers to assess the amount of obstruction the dams caused. The authors then examined location data for fish species believed to be at risk of extinction because they are restricted to a specific region or because they have to migrate up rivers as part of their life cycle. This allowed the researchers to identify regions where dams pose the biggest risk to fish species. Factoring in where there has been additional habitat alteration-a known risk for many fishes-allowed the authors to further refine their list of the danger zones.

The results pointed to Murray-Darling Province (Australia), Southern Italy, the Lower and Middle Indus Basin, West Korea, the Upper Paraná (southern Brazil), the South Atlantic coast of the United States, and Mobile Bay ecoregions as having notable numbers of fish species at risk and heavy dam obstruction. Other parts of the United States in the 18 ecoregions deemed to present the greatest risks worldwide include the Great Lakes and part of the Gulf of Mexico. Much of the Danube, Iberia, and the Southern Temperate Highveld in South Africa are also on the list. These 18 ecoregions, the authors write, "merit immediate conservation attention." Eels, shads, lampreys, sturgeons, and salmonids stand out as being especially vulnerable.

The authors explain that their findings will help researchers and planners in identifying important regions where conservation is feasible because the watercourses are relatively unobstructed and are home to at-risk species. The results also flag regions where restoration-possibly even including dam removal-is desirable if fishes are to be conserved.

American Institute of Biological Sciences


Related Fish Species Current Events and Fish Species News Articles


Top marine scientists call for action on 'invisible' fisheries
To protect our oceans from irreversible harm, governments, conservationists, and researchers around the world must address the enormous threat posed by unregulated and destructive fisheries, say top marine scientists.

University of Tennessee study finds fish just wanna have fun
Fish just want to have fun, according to a University of Tennessee, Knoxville, study that finds even fish "play."

To help solve slums, innovators build jobs, food security into affordable housing blueprints
Building on the poverty relief success achieved through self-sustaining high-tech "smart villages," Malaysian innovators have created blueprints for an urban counterpart that combines affordable homes, food security and sustainable jobs, aiming to solve the growing global problem of squalid city slums.

In stickleback fish, dads influence offspring behavior and gene expression
Researchers report that some stickleback fish fathers can have long-term effects on the behavior of their offspring: The most attentive fish dads cause their offspring to behave in a way that makes them less susceptible to predators.

Malaysia's 'Smart Villages' and 9 other proven ideas for sustainable development
As nations zero in on the UN's post-2015 global Sustainable Development Goals, innovations being successfully pioneered and demonstrated in Malaysia offer several proven tactical ideas for improving the world, says an influential international sustainable development networking organization.

Biologists try to dig endangered pupfish out of its hole
Scientists estimate that fewer than 100 Devils Hole pupfish remain in their Mojave Desert home, but a conservation biologist at the University of California, Berkeley, is giving important guidance in the efforts to rescue them by establishing a captive breeding program.

Climate Change Will Threaten Fish by Drying Out Southwest U.S. Streams, Study Predicts
Fish species native to a major Arizona watershed may lose access to important segments of their habitat by 2050 as surface water flow is reduced by the effects of climate warming, new research suggests.

New Study Reveals Vulnerability of Sharks as Collateral Damage in Commercial Fishing
A new study that examined the survival rates of 12 different shark species when captured as unintentional bycatch in commercial longline fishing operations found large differences in survival rates across the 12 species, with bigeye thresher, dusky, and scalloped hammerhead being the most vulnerable.

Atlantic salmon also show capacity to adapt to warmer waters
Populations of Atlantic salmon have a surprisingly good capacity to adjust to warmer temperatures that are being seen with climate change, a group of scientists at the University of Oslo and University of British Columbia have discovered. The finding about Atlantic species adds to recent UBC-supported research on heat tolerance of Pacific salmon.

Innovative Technique May Transform the Hunt for New Antibiotics and Cancer Therapies
Antibiotic resistance is depleting our arsenal against deadly diseases and infections, such as tuberculosis and Staph infections, but recent research shows promise to speed up the drug discovery process.
More Fish Species Current Events and Fish Species News Articles

Peterson Field Guide to Freshwater Fishes, Second Edition (Peterson Field Guides)

Peterson Field Guide to Freshwater Fishes, Second Edition (Peterson Field Guides)
by Lawrence M. Page (Author), Brooks M. Burr (Author), Eugene C. Beckham (Illustrator), Justin Sipiorski (Illustrator), Joseph Tomelleri (Illustrator), John P. Sherrod (Illustrator)


There are nearly 1,000 species of freshwater fishes in North America alone, and identifying them can sometimes be a daunting task. In fact, in just the twenty years since publication of the first edition of the Peterson Field Guide to Freshwater Fishes, the number of species has risen by almost 150, including 19 marine invaders and 16 newly established nonnative species. This second edition incorporates all of these new species, plus all-new maps and a collection of new and revised plates. Some of the species can be told apart only by minute differences in coloration or shape, and these beautifully illustrated plates reveal exactly how to distinguish each species. 

The guide includes detailed maps and information showing where to locate each species of fish—whether that species...

The 101 Best Freshwater Nano Species: How to Choose & Keep Hardy, Brilliant, Fascinating Nano Fishes, Plants & Invertebrates (Adventurous Aquarist Guide)

The 101 Best Freshwater Nano Species: How to Choose & Keep Hardy, Brilliant, Fascinating Nano Fishes, Plants & Invertebrates (Adventurous Aquarist Guide)
by Mark Denaro (Author), Rachel O'Leary (Author)


Freshwater nano tanks, or tanks under 20 gallons as the authors define them, have become increasingly popular over the past few years. There are hundreds of species available to aquarium keepers on a regular basis, so figuring out which ones to choose for these specialized tanks can be a daunting task. The 101 Best Freshwater Nano Species is the only field guide that helps you choose and keep fishes, plants, and invertebrates specifically for nano tanks. Written by two leading experts in the field of nano tanks, this fully illustrated guide will prepare you to keep these wonderful and fascinating animals successfully.

500 Freshwater Aquarium Fish: A Visual Reference to the Most Popular Species

500 Freshwater Aquarium Fish: A Visual Reference to the Most Popular Species
by Greg Jennings (Editor)


Expert advice on freshwater aquarium fish. Illustrated in full color, this comprehensive reference includes 500 of the most popular freshwater aquarium fish. It provides concise at-a-glance information on their behavior, diet and breeding, along with a recommended aquarium setup. Practical and well organized, this book is tailored to the needs of a wide range of freshwater-aquarium hobbyists. A key decision for the aquarium owner, and also one of the most fun to make, is choosing the fish for a tank. 500 Freshwater Aquarium Fish is a "window shopping" trip, with an expert alongside to offer crucial advice. This thorough directory details every appropriate species. While most of the fish featured require a heated aquarium, there are other popular varieties, such as goldfish, that...

Aquarium Guide: Tropical Fish Species Guide (Aquarium Guides)

Aquarium Guide: Tropical Fish Species Guide (Aquarium Guides)


Learn about your tropical fish the easy way with full colour fish profiles, vital stats, compatibility advice, feeding requirements and more...

Looking After Tropical Fish is the essential guide to setting up, maintaining and getting the most out of your tropical aquarium, providing a complete resource for both beginner and enthusiast.

This book explores
common tropical fish profiles
feeding requirements
fish compatibility advice
vital statistics
aquarium setup advice and requirements
and more...
Whether you have just bought your first aquarium or have been running one for a while, this book will provide you with a firm grasp of the underpinning foundations and equip you with the knowledge needed to choose and house your...

A PocketExpert Guide to Reef Aquarium Fishes: 500+ Essential-to-Know Species (Microcosm/T.F.H. Professional)

A PocketExpert Guide to Reef Aquarium Fishes: 500+ Essential-to-Know Species (Microcosm/T.F.H. Professional)
by Scott W. Michael (Author)


Brilliant photography by the world's best underwater photographers and leading international aquarists highlights detailed profiles of more than 500 species of reef aquarium fishes in this new title in the Microcosm/T.F.H. Professional Series. Organized by family for easy reference, each profile includes all essential care, feeding, and husbandry advice. The species profiles include all available reef aquarium choices, with scores of seldom seen, rare, and recently discovered species. Written by the world's most-read, most-respected expert on marine fishes for the home aquarium, PocketExpert(tm) Guide to Reef Aquarium Fishes is a must-read for any fish enthusiast.

  Deep-Sea Cartilaginous Fishes of the Indian Ocean (Fao Species Catalogue for Fisheries Purposes)
by Food and Agriculture Organization of the (Author)


This volume is a comprehensive, fully illustrated Catalogue encompasses FAO Fishing Areas 51 and 57, and that portion of Area 47 off South Africa from about 18 42'E to 30 00'E. The present volume covers 4 orders, 10 families, 28 genera, and 78 species and includes a section on standard measurements for batoids and chimaeras with associated terms. It provides accounts for all orders, families, and genera and all keys to taxa are fully illustrated. A species representative of each genus is also provided and includes: valid modern names and original citation of the species; synonyms; the English, French, and Spanish FAO names for the species; a lateral view and often other useful illustrations; field marks; diagnostic features; distribution, including a GIS map; habitat; biology; size;...

The 101 Best Nano-Reef Species: How to Choose & Keep Hardy, Brilliant, Fascinating Species Perfect for Small Aquariums (Adventurous Aquarist Guide)

The 101 Best Nano-Reef Species: How to Choose & Keep Hardy, Brilliant, Fascinating Species Perfect for Small Aquariums (Adventurous Aquarist Guide)
by Scott W. Michael (Author)


The popularity of nano tanks (or tanks under 30 gallons) has exploded over the past few years. These delicate systems require specialized species that are able to survive and thrive in a smaller tank. The 101 Best Nano-Reef Species offers expert advice on selecting and keeping brilliant and hardy fishes, corals, and invertebrates for nano-reef tanks.

A PocketExpert Guide to Marine Fishes: 500+ Essential-To-Know Aquarium Species

A PocketExpert Guide to Marine Fishes: 500+ Essential-To-Know Aquarium Species
by Scott W. Michael (Author)


Like a field guide to marine aquarium fishes, this first PocketExpert™ Guide offers a quick but authoritative reference for identifying, buying, and keeping more than 500 popular saltwater species. Designed by a team of marine enthusiasts and aquarium professionals, this information-packed handbook covers all of the fishes most often seen by hobbyists. "One species per page" listing offers concise, clear advice and data on: scientific and common names, maximum length, range, minimum aquarium size, foods and feeding, aquarium suitability, reef aquarium compatibility, behavior, and captive care advice. Included are all 29 major families and groups of marine aquarium fishes, ranging from angelfishes, butterflyfishes, and cardinalfishes to surgeonfishes, triggerfishes, and wrasses.

The 7 Best Beginning Tropical Fish Species For Starting A New Aquarium

The 7 Best Beginning Tropical Fish Species For Starting A New Aquarium
by BlueRam Group


A detailed look at seven fish families that are suitable for beginning a tropical fish aquarium and one fish to never use for starting a new tank.

The book includes a detailed look at compatibility between families and their suitability for use in starting a small, medium or large aquarium.

Convenient tables are provided for a side by side comparison.

See something you like or something you'd like to see in the next version leave us a comment.

Thank You and Enjoy,

Steve Pond

Saltwater Fishes: A Folding Pocket Guide to Familiar North American Species (Pocket Naturalist Guide Series)

Saltwater Fishes: A Folding Pocket Guide to Familiar North American Species (Pocket Naturalist Guide Series)
by James Kavanagh (Author), Raymond Leung (Illustrator)


Saltwater Fishes is the perfect pocket-sized, folding guide for the nature enthusiast. This beautifully illustrated guide highlights over 140 familiar species organized by family. Created and printed in the USA, this guide was updated in 2012 with a new cover design and updated species selection. Laminated for durability, this handy guide is a great source of portable information and ideal for field use by novices and experts alike.

Note: Please be advised this product has two different versions of cover image, however the content and interior are all identical.

© 2014 BrightSurf.com