Science Current Events | Science News | Brightsurf.com
 

PNAS: Evolutionary changes could aid fisheries

July 19, 2013
Sustainable fishing practices could lead to larger fishing yields in the long run, according to a new study that models in detail how ecology and evolution affect the economics of fishing.

Evolutionary changes induced by fisheries may benefit the fishers, according to a new study published last week in the Proceedings of the National Academy of Sciences. But if fisheries are not well-managed, this potential benefit turns into economic losses, as stocks decline from overfishing and further suffer from evolution.

The bad news is that today very few fisheries are managed in a way that will lead to yield increases in the long term. While these fisheries may not be in danger of collapsing, IIASA Evolution and Ecology Program Leader Ulf Dieckmann says, "There is a big difference between preventing stocks from collapsing and managing them so as to achieve an optimal harvest."

The new study, led by 2005 IIASA YSSP participant and Peccei Award winner Anna Maria Eikeset, examines Northeast Arctic cod, one of the most commercially important fisheries in the world. It builds on a growing body of work showing that fisheries-induced evolution typically leads to faster growth and earlier maturation.

These evolutionary changes may harm a fishery, since they tend to lead to smaller adult fish and could push the animals to reproduce at too early an age, when they are not yet good at it. On the other hand, the changes can also lead to greater reproduction and hence more fish. But nobody knew how these negative and positive effects balance out economically.

The new study shows that the balance depends on how aggressively a stock is fished: if the fish are harvested optimally, evolution helps, whereas if the fish are harvested too aggressively, evolution harms the economic interests of fishers and fishing nations.

Consequently, to reap these long-term benefits, fisheries managers must first cut back substantially on the amount of fish that are harvested today.

"Harvesting Northeast Arctic cod optimally means taking 50% less fish," says Dieckmann. "Our model shows that by making this substantial cut and waiting for the stock to rebuild, evolution and natural growth could lead to sustainable yields over 30% greater than today."

Reference

Eikeset, A.M., et al. 2013. Economic repercussions of fisheries-induced evolution. Proceedings of the National Academy of Sciences of the USA. July 8, 2013. Open access: http://www.pnas.org/content/early/2013/07/05/1212593110.abstract

International Institute for Applied Systems Analysis (IIASA)


Related Fisheries Current Events and Fisheries News Articles


A new trout species described from the Alakır Stream in Antalya, Turkey
A group of researchers from Recep Tayyip Erdoğan University, Faculty of Fisheries in Turkey discovered a new trout species.

Climate change projected to drive species northward
Anticipated changes in climate will push West Coast marine species from sharks to salmon northward an average of 30 kilometers per decade, shaking up fish communities and shifting fishing grounds, according to a new study published in Progress in Oceanography.

New model helps boost fishery profits and sustainability
By identifying the most efficient fishing practices and behaviors, a new model developed by economists at Duke University and the University of Connecticut could help fishermen land larger paychecks while reducing the risk of fishery depletion.

Tinkering with the Tao of pandas
Good news on the panda front: Turns out they're not quite as delicate - and picky - as thought.

Study of deadly bat disease finds surprising seasonal pattern of infections
The deadly fungal disease known as white-nose syndrome has spread to bat colonies throughout eastern North America over the past seven years, causing bat populations to crash, with several species now at risk of extinction.

New techniques for estimating Atlantic bluefin tuna reproduction
Using a new approach for determining the age at sexual maturity for wild stocks of western Atlantic bluefin tuna, researchers led by Molly Lutcavage of the University of Massachusetts Amherst and Gilad Heinisch of Israel's Oceanographic and Limnological Research Center, suggest that these fish mature at a considerably younger age than cuurently assumed.

Avoiding ecosystem collapse
From coral reefs to prairie grasslands, some of the world's most iconic habitats are susceptible to sudden collapse due to seemingly minor events.

History's lesson reveals depth of fish catch decline
Scientists in Queensland have used historic media to measure the decline in Queensland's pink snapper fishery, highlighting a drop of almost 90 per cent in catch rates since the 19th Century.

Businesses Can Help Preserve Endangered Species, Improve Employee Morale With Small Landscape Changes
Raptors, or birds of prey, some of which are endangered species, typically live in environments that provide natural land cover, such as forests and grasslands.

UT Arlington team says non-genetic changes can help parents or offspring, not both
A new study from The University of Texas at Arlington biologists examining non-genetic changes in water flea development suggests something human parents have known for years - ensuring a future generations' success often means sacrifice.
More Fisheries Current Events and Fisheries News Articles

Four Fish: The Future of the Last Wild Food

Four Fish: The Future of the Last Wild Food
by Paul Greenberg (Author)


"A necessary book for anyone truly interested in what we take from the sea to eat, and how, and why." -Sam Sifton, The New York Times Book Review.

Writer and life-long fisherman Paul Greenberg takes us on a journey, examining the four fish that dominate our menus: salmon, sea bass, cod, and tuna. Investigating the forces that get fish to our dinner tables, Greenberg reveals our damaged relationship with the ocean and its inhabitants. Just three decades ago, nearly everything we ate from the sea was wild. Today, rampant overfishing and an unprecedented biotech revolution have brought us to a point where wild and farmed fish occupy equal parts of a complex marketplace. Four Fish offers a way for us to move toward a future in which healthy and sustainable seafood is the rule rather...

Modelling and Quantitative Methods in Fisheries, Second Edition

Modelling and Quantitative Methods in Fisheries, Second Edition
by Malcolm Haddon (Author)


With numerous real-world examples, Modelling and Quantitative Methods in Fisheries, Second Edition provides an introduction to the analytical methods used by fisheries’ scientists and ecologists. By following the examples using Excel, readers see the nuts and bolts of how the methods work and better understand the underlying principles. Excel workbooks are available for download from CRC Press website. In this second edition, the author has revised all chapters and improved a number of the examples. This edition also includes two entirely new chapters: Characterization of Uncertainty covers asymptotic errors and likelihood profiles and develops a generalized Gibbs sampler to run a Markov chain Monte Carlo analysis that can be used to generate Bayesian posteriors Sized-Based Models...

Fisheries Techniques

Fisheries Techniques
by Brian R. Murphy (Author), David W. E. Willis (Author)


Book by Murphy, Brian R., Willis, David W. E.

Fisheries Biology, Assessment and Management

Fisheries Biology, Assessment and Management
by Michael King (Author)


This excellent second edition of Fisheries Biology, Assessment and Management, has been fully updated and expanded, providing a book which is an essential purchase for students and scientists studying, working or researching in fisheries and aquatic sciences.In the same way that excessive hunting on land has threatened terrestrial species, excessive fishing in the sea has reduced stocks of marine species to dangerously low levels. In addition, the ecosystems that support coastal marine species are threatened by habitat destruction, development and pollution. Open access policies and subsidised fishing are placing seafood in danger of becoming a scarce and very expensive commodity for which there is an insatiable demand.Positive trends include actions being taken to decrease the incidental...

American Catch: The Fight for Our Local Seafood

American Catch: The Fight for Our Local Seafood
by Paul Greenberg (Author)


"Greenberg’s breezy, engaging style weaves history, politics, environmental policy, and marine biology." --New Yorker

In American Catch, award-winning author Paul Greenberg takes the same skills that won him acclaim in Four Fish to uncover the tragic unraveling of the nation’s seafood supply—telling the surprising story of why Americans stopped eating from their own waters.

In 2005, the United States imported five billion pounds of seafood, nearly double what we imported twenty years earlier. Bizarrely, during that same period, our seafood exports quadrupled. American Catch examines New York oysters, Gulf shrimp, and Alaskan salmon to reveal how it came to be that 91 percent of the seafood Americans eat is foreign.

In the 1920s, the average New...

Marine Fisheries Ecology

Marine Fisheries Ecology
by Simon Jennings (Author), Michel J. Kaiser (Author), John D. Reynolds (Author)


CLICK HERE TO DOWNLOAD ARTWORK
This topical and exciting textbook describes fisheries exploitation, biology, conservation and management, and reflects many recent and important changes in fisheries science. These include growing concerns about the environmental impacts of fisheries, the role of ecological interactions in determining population dynamics, and the incorporation of uncertainty and precautionary principles into management advice. The book draws upon examples from tropical, temperate and polar environments, and provides readers with a broad understanding of the biological, economic and social aspects of fisheries ecology and the interplay between them. As well as covering 'classical' fisheries science, the book focuses on contemporary issues such as industrial fishing,...

Fisheries Ecology

Fisheries Ecology
by Paul Hart (Author), T.J. Pitcher (Author)


The author spent much of 1989 and 1990 living within the Muscovite community and came into contact with people at all levels, from pimps to philosophers. He provides a portrait of a society which is struggling to survive the traumas and changes of the Gorbachev years. In some ways more medieval and Oriental than modern and Western, Moscow is a city in which tales of flying saucers and masonic conspiracies co-exist with endless queues, corruption, anti-semitism and a black market in guns. Durden-Smith also discovered in Moscow an intellectual passion and energy which puts most Western capitals to shame and which makes Moscow not only one of the most important, but also one of the most complex, contradictory and fascinating cities on earth.

Introduction to Wildlife and Fisheries (Paperback)

Introduction to Wildlife and Fisheries (Paperback)
by David Willis (Author), Charles Scalet (Author)


The new edition of Introduction to Wildlife and Fisheries marks the return of first and only book to integrate both the wildlife and fisheries into a single textbook at the introductory level.  Thoroughly updated, with an inviting new design, the Second Edition offers the most current and accessible coverage of essential biological concepts and their applications, principles of resource management and conservation, and contemporary and public policy issues affecting today’s scientists and resources.

5 Easy Pieces: The Impact of Fisheries on Marine Ecosystems (The State of the World's Oceans)

5 Easy Pieces: The Impact of Fisheries on Marine Ecosystems (The State of the World's Oceans)
by Daniel Pauly (Author)


5 Easy Pieces features five contributions, originally published in Nature and Science, demonstrating the massive impacts of modern industrial fisheries on marine ecosystems. Initially published over an eight-year period, from 1995 to 2003, these articles illustrate a transition in scientific thought—from the initially-contested realization that the crisis of fisheries and their underlying ocean ecosystems was, in fact, global to its broad acceptance by mainstream scientific and public opinion.
 
Daniel Pauly, a well-known fisheries expert who was a co-author of all five articles, presents each original article here and surrounds it with a rich array of contemporary comments, many of which led Pauly and his colleagues to further study. In addition, Pauly documents how popular...

U.s. Catch Share Programs: Economic Performance of Fishery Management

U.s. Catch Share Programs: Economic Performance of Fishery Management
by Alfred G. Solomon (Editor)




© 2014 BrightSurf.com