Archive for the View from the Ocean Category

May 2 2011

Plenty more fish in the sea?

New method for measuring biomass reveals fish stocks are more stable than widely believed

Fish and marine species are among the most threatened wildlife on earth, due partly to over exploitation by fishing fleets. Yet there are differences in assessing trends in worldwide fishing stocks which, researchers writing in Conservation Biology argue, stem from inappropriate use of time trends in catches. 

Trevor Branch

“Estimates of fishery status based on catches suggest that around 30% of fisheries are collapsed and 70% are overexploited or collapsed,” said lead author Dr Trevor Branch from the University of Washington in Seattle. “Our assessment shows that these data are seriously biased, and that instead we should be looking at biomass data.Biomass data from scientific stock assessments indicated a much smaller proportion in these categories (12% collapsed, 26% overexploited or collapsed), and that status trends are stable. Our analysis suggests that in most regions fisheries management has led to stabilization, and even recovery, of fished populations.”

“Species which are targeted by fishing fleets are divided into stocks, a division of species into units based on political boundaries, genetic divergence, and biological characteristics,” said Branch. “The depletion of these stocks has important implications for ecosystem biodiversity; however methods of measuring depletion vary greatly.”

Dr Branch’s team considered stocks being “collapsed” or “overexploited” on the basis of catch and biomass data. Collapse is defined as biomass of less than 10% of unfished levels while over exploitation is defined by the governments of the United States and Australia as biomass below 50% of biomass that would produce maximum sustained catches.  These reference points are widely used in fisheries management, either as management targets or as limits not to be exceeded.

Previous methods for assessing status were on the basis of catch trends, however, methods based on biomass data find much lower percentages that are collapsed or over exploited, and relatively stable future trends. “Our study found the status of stocks worldwide based on catch trends to be almost identical to what would be expected if catches were randomly generated with no trend at all,” said Branch, “and that most classifications of collapse on the basis of catch data are not true collapses but are due to taxonomic reclassification, regulatory changes in fisheries, and market changes.”

Where biomass data are available, this can be used to ground truth the catch trends; this shows that catch data greatly overestimates the percentage of stocks collapsed and overexploited. Although the team’s biomass data was primarily from industrial fisheries in developed countries, the status of these stocks estimated from catch data is similar to the status of stocks in the rest of the world estimated from catch data.

“Instead of focusing on what we take out of the oceans (catches), we should be examining the actual state of the ecosystem (biomass data),” concludes Branch. “Catch data produce seriously biased estimates of what is going on in ocean ecosystems, and we need more effort expended on scientific surveys and stock assessments, especially in areas that are currently poorly assessed.”

This paper is published in Conservation Biology. Fore more information contact Lifesciencenews@wiley.comThis e-mail address is being protected from spam bots, you need JavaScript enabled to view it  +44 (0) 1243 770 375

Full Citation
:  Branch TA, Jensen OP, Ricard D, Ye Y, Hilborn R, “Contrasting global trends in marine fishery status obtained from catches and from stock assessments”, Conservation Biology, March 2011, DOI

Apr 1 2011

Ocean acidification – changing planet (video)

As higher amounts of carbon dioxide become absorbed by the oceans, some marine organisms are finding it’s a struggle to adjust.

The Changing Planet series explores the impact that climate change is having on our planet, and is provided by the National Science Foundation & NBC Learn.

 

Mar 27 2011

The Future for the American Seafood Industry: Remarks by Eric Schwaab for the International Boston Seafood Show

 

Eric Schwaab, Administrator of NOAA Fisheries (National Marine Fisheries Service) spoke at the International Seafood Show in Boston on March 21:


I am here today for four reasons:
1. To emphasize that the nation’s fisheries are being actively monitored, managed and enforced to ensure their sustained use and abundance;
2. To highlight the importance of this year – 2011 – and the milestone it represents in reaching the national objective of sustainable fisheries and the supply of seafood;
3. To reach out and engage with you as members of the broader seafood supply industry and make our information more accessible and useful to you and your customers; and
4. To further focus and increase attention on the challenges that face us ahead.

How do we do a better job of getting out the word on the progress made in management of domestic fisheries? That, coupled with increasing awareness of the health benefits of seafood is a challenge, but one that we’ve taken on at NOAA Fisheries. We have established a website for consumers and retailers called ‘FishWatch”.

This site profiles the species I’ve just mentioned along with more than 80 others — and more to come. FishWatch provides you and the consumer a thumb-nail profile of the status of these stocks, their ecosystem considerations, including issues of habitat and bycatch impacts associated with their harvest, and how these impacts are managed, monitored and controlled through the fishery management process.

While there are many messages out in the market place, we know that US fisheries – – managed under the MSA and its prescriptive standards to base decisions on the best available science, protect habitat, minimize bycatch, and set sustainable harvest levels – – are inherently sustainable and have a valuable story to tell.

 

Read the complete text of Mr. Schwaab’s speech.

 

Mar 25 2011

Fisheries chief sees end to overfishing

March 22, 2011


By Richard Gaines Staff Writer

The administrator of federal fisheries has reportedly declared restoration efforts of overfished stocks — now in their fourth decade under Magnuson-Stevens Act mandates — have succeeded in making sustainable the nation’s last great wild food resource.

In informal remarks during a private meeting with a seafood marketing group on the first day of the International Boston Seafood Show, Eric Schwaab, administrator of the National Marine Fisheries Service, was applauded not only for his optimistic assessment of the long struggle to end overfishing, but for his commitment to marry government resources with U.S. industry efforts at increasing the domestic share of the global seafood market, according to multiple audience sources.

Handling Samplesphoto © 2010 Deepwater Horizon Response | more info (via: Wylio)

Schwaab spoke to about 70 members of the National Seafood Marketing Coalition on Sunday, during the first day of the three-day seafood show, considered an apex event on the global fisheries calendar.

Expressed in multiple variations, the theme of the show, according to Seafood.com, an industry news site, was supplier and seller efforts to measure and demonstrate seafood sustainability in a global market in which 84 percent of U.S. consumption is imported, half of it farmed.

The leading exporter to U.S. markets is China, to which the United States had a $1.6 billion trade deficit in seafood alone in 2010, according to government statistics.

Schwaab’s characterization of the success of stock restoration efforts in the United States intersects the pending Senate confirmation hearing as ambassador to China of Gary Locke.

Locke, the Secretary of Commerce, has become the center of a festering dispute between coastal state congressional leaders and the White House over administration fisheries policy, and whether the conversion to catch share management and a commodities market system has caused grave harm to the industry and fishing communities, as U.S. Sens. John Kerry, Scott Brown and Congressmen John Tierney and Barney Frank, all of Massachusetts, and other lawmakers have argued.

Read the rest of the story from the Gloucester Times.

 

Feb 15 2011

Sardine collapse due to multiple causes

This commentary was originally published in the Monterey County Herald.

By D.B. PLESCHNER
Guest commentary

On Jan. 30 The Herald published an excerpt, headlined “Overfishing triggered ruin of the sardine,” from a book by authors Steve Palumbi and Carolyn Sotka.

But there’s just one problem. The story is not entirely true.

“Ruin” is a harsh – and incorrect – headline to describe the storied sardine decline in the 1940s.   While the fish exodus may have ruined the canneries that once crowded Cannery Row, the sardines did return. And so has Monterey’s wetfish industry – so named because these species were canned ‘wet from the sea’ with little preprocessing.

In their column, Palumbi and Sotka actually allude to the fact that there is much more to the story than simple overfishing.  They note that, “Ed [Ricketts] also somehow knew that part of the problem was not overfishing, but a change in the ocean.”

In the 1960s, two decades after Ed Ricketts, scientists studying anaerobic sediments in the Santa Barbara Basin in Southern California discovered a natural historic record of pelagic fish populations, including sardine and anchovy.  These initial findings were the first step in proving Ed Ricketts’ earlier theories about ocean cycles.

In fact, analysis of the scale-deposition series showed that sardines and anchovies both tended to vary, layered in the deep mud, over a period of approximately 60 years, with the average time for sardine recovery about 30 years.

What’s more, the scale-deposition record counted nine major recoveries and subsequent collapses of the sardine population over a 1,700 year period.  Scientists Soutar, Isaacs, Baumgartner and others found the current recovery was not unlike those of the past in its rate or magnitude. Sardines were fated to decline with or without fishing pressure:  warm-water cycles favor sardines, and cold-water cycles favor anchovies.

Sardine recoveries and collapses

The sardine decline spurred the creation of the California Cooperative Fisheries Investigations (CalCOFI), a consortium composed of the National Marine Fisheries Service (NMFS), Scripps Institution of Oceanography and California Department of Fish and Game (DFG), whose focus was to study the sardine and other coastal pelagic species in the California Current System. California’s wetfish industry contributed funding and manpower to advance the research.

The DFG curtailed sardine harvest beginning in the late 1960s, and lifted the moratorium to allow a 1,000-ton harvest nearly 20 years later, after estimating a biomass of at least 20,000 tons.  The sardine resource expanded at an estimated 30 percent per year in the 1980s, stretching its boundaries from Southern California to the Pacific Northwest and Canada by the late 1990s.  New research and scientific models estimated the population at more than one million metric tons in 1999, when management authority transferred to the federal NMFS, which declared the population fully recovered.

Currently there’s a shift to a cold-water Pacific decadal oceanic cycle; the sardine population may again be entering another natural decline.  But now California’s sardine industry is limited to only 65 permitted vessels (63 active), restricted by a capacity goal and landing limits.   The sardine fishery is regulated under the federal Magnuson Act, with strict overfishing limits and annual catch limits to prevent overfishing.

The harvest control rule deducts 150,000 metric tons off the top of the biomass estimate (all fishing would be curtailed below that level) to provide forage for other marine life, as well as ensure a sustainable base population.  In addition, the allowed harvest rate is only 15 percent (net 10-11 percent after subtracting the 150,000 mt ‘cutoff’), far lower than other fishery exploitation rates.

Today the wetfish industry in Monterey is a traditional industry with a contemporary outlook.

Fishermen and markets actively engage in collaborative research on sardine and also market squid. The sons of the fathers and grandfathers before them who now harvest and process the wetfish complex– sardines, anchovies and market squid, all dynamic resources with natural cycles of abundance – still form the foundation of Monterey’s storied fishing community – culturally and economically.

These fishing families hope to carry on; and they should – wetfish resources are among the most sustainable marine life species in California, especially under today’s precautionary fishery management.

With 30 years of fishing industry experience, D.B. Pleschner is the executive director of the non-profit California Wetfish Producers Association, whose mission is to protect wetfish resources and the historic industry.  She’s a former contributing editor of Pacific Fishing magazine, and manager of the California Seafood Council.

Jan 18 2011

Dr. Ray Hilborn Discusses the State of World Fisheries, and more…[Video]

“Doomsday will come to fishes across the world’s oceans by 2048.”  That was the startling implication of findings published in 2006 by marine ecologist Boris Worm of Dalhousie University in Halifax, Canada, and several colleagues.

The projection, published in a paper in Science magazine, was about the relationship between biodiversity and ecosystem services in the oceans, and concluded that the world’s oceans were in bad shape, in part because of overfishing.

But many fisheries scientists were appalled.  In fact, one prominent critic was Dr. Ray Hilborn, a professor in the School of Aquatic and Fishery Sciences, University of Washington, specializing in natural resource management and conservation.

Trained in quantitative techniques for determining the abundance of fish stocks, Hilborn and others  questioned the methods used in Worm’s global assessment.  The conflict continued a charged and long-simmering debate between marine ecologists and fisheries scientists about the status of the world’s ocean ecosystems.

Yet, less than a year later, as recounted in a Science magazine article entitled “Détante in the Fisheries War,” Hilborn and Worm began meeting on neutral ground to hammer out their differences. Working under the auspices of the National Center for Ecological Analysis and Synthesis(NCEAS) in Santa Barbara, California, Hilborn and Worm brought together some 20 scientists from their respective disciplines as well as dozens of graduate students.

Initial results from this collaboration were published in the July 31, 2009 issue of Science magazine: Rebuilding Global Fisheries.

A new series of videos posted on WorldNews provides a video account of the highlights of this ground-breaking research.  Three videos feature Dr. Hilborn on the state of the world’s fisheries. Another video, including interviews with both Hilborn and Boris Worm, highlights findings in the Rebuilding Global Fisheries study, and yet another video presents Dr. Hilborn’s remarks at a Science Advisory Team meeting of the Marine Life Protection Act Initiative in southern California, critiquing the state’s rigid size and spacing guidelines governing marine protected area placement in the Golden State.

The first three videos are posted below:

Jan 17 2011

Mineo brothers grateful for bountiful squid season

By Robert Walch • January 14, 2011

The Californian (Salinas)

Squid are poured into bins on Wharf No. 2 in Monterey from the Mineo brothers' boat in November. (ROBERT WALCH of The Californian)

Third-generation Monterey fishermen Frank Mineo and his older brother, Sal, hope that they will be able to make it to the end of their working lives in the family business. Whether there will be another generation of Mineo men fishing on Monterey Bay remains to be seen.

With new regulations, closed fisheries and the fickleness of the fish population, fishing on the Central Coast has always been a feast-or-famine proposition.

Frank Mineo, a Fisherman’s Flats resident, said there have been a few years recently when taking the Mineo Bros.’ 58-foot Alaskan Limit Seiner out into the bay was a money-losing proposition. But this year has been different. Very different!

“It has been up and down for years because of weather, nutrient upwelling, water temperature and other things,” Mineo said. “Over the last decade, our biggest season was 2003, but this year will be the best we have had in 20 years of fishing.”

Read the rest of the story here.

Jan 17 2011

Squid A Day: Fishing for Future Generations

By Danna Staaf
Created Jan 14 2011 – 4:48pm

I know, I know, I won’t shut up about squid fishing. But the Salinas Californian has a neat human-interest article about the closure of the market squid fishery, bringing the message home to Homo sapiens:

Third-generation Monterey fishermen Frank Mineo and his older brother, Sal, hope that they will be able to make it to the end of their working lives in the family business. Whether there will be another generation of Mineo men fishing on Monterey Bay remains to be seen.

Read more here.

Dec 18 2010

State panel approves creation of protected marine area off Southern California coast

December 15, 2010

SANTA BARBARA, Calif. (AP) — State wildlife regulators voted Wednesday to create a zone of protected areas off the Southern California coast where fishing and other activities will be restricted or banned.

The Fish and Game Commission listened to hours of public comment before approving the marine protected area along a 250-mile arc of coastline from the Mexican border to Santa Barbara County.

To comply with the state’s Marine Life Protection Act of 1999, California’s 1,100-mile coast was divided into five sections. Two protected areas were previously created in Northern and Central California. Southern California is the third area to undergo the process.

The establishment of such areas has been a particularly thorny issue in Southern California, where conservationists, fishermen and seaside business interests have collided.

The commission voted 3-2 in favor of the protected area. Supporters clapped when the vote was cast. Many had urged the panel to increase the size of the protected locations within the reserve.

The process appeared to have done little to quell opposition, even though the proposal has been in the works for two years and was aired at dozens of public hearings.

Fishing industry experts expressed concern about the survival of their industry. California Fisheries Coalition manager Vern Goehring and others predicted lawsuits.

“The public image or message that proponents are giving is this is a great thing protecting the ocean,” Goehring said. “But in reality, most people know if you regulate fishing — which is already regulated — it doesn’t do anything new about water quality, coastal development and other threats.”

Read the rest of the story here.

Dec 17 2010

State doubles size of region’s marine reserves

By Mike Lee

December 15, 2010

Underwater state parks will nearly double in size across Southern California under a lightning-rod plan
approved Wednesday by California’s Fish and Game Commission to boost ocean health.

The strategy is less aggressive than what many conservationists wanted, but they praised it as a
good start toward recovering numerous species, from lobster to sheephead. The biggest impacts will be
felt by fishermen who said they will be squeezed into less-fertile waters, creating economic losses
and crowding.

Read the rest of the story here.