Modifications to Fishing Vessels Reduces Seabird Mortality

"Modern fishing methods are accidentally killing around 100,000 albatrosses globally every year - that's one every five minutes", said Dr Ben Sullivan - BirdLife's Global Seabird Programme Coordinator.

"In longline fisheries albatrosses die when they try to steal fish bait from hooks; in trawl fisheries they are killed when they birds collide with the fishing gear whilst trying to collect discarded fish," according to findings being reported by BirdLife International.

"The good news is that we have some simple and cost-effective measures that fishermen are increasingly using which are saving the lives of thousands of albatrosses in South America", said Dr Esteban Frere of BirdLife's Global Seabird Programme.

Using simple measures, there have been "impressive" results in South America. For example:

• "In the south of Chile, the incidental capture of seabirds was reduced from over 1,500 birds in one year to zero through the adoption of modified fishing gear
• "In Argentina the use of mitigation in the trawl fishery has shown that it is possible to reduce seabird mortality to close to zero
• "In Brazil the voluntary adoption of simple bird-scaring lines has helped reduce incidental capture of seabirds by 56%

To help with their educational effort, The Albatross Task Force has released a leaflet explaining explain the simple, cost-effective methods that prevent deaths of albatrosses and other seabirds. The Spanish language leaflet is available by clicking here.

"The ATF works in seven priority countries - including Ecudor, Chile, Argentina, Uruguay and Brazil - where albatrosses are known to die in hugely unsustainable numbers in longline and trawl fisheries."

Apparent Success for Rat Eradication at Aleutian Island

After a thorough survey of Rat Island, officials have found no sign of the Norway rats that had been present since they were introduced about 1780 when a Japanese ship wrecked on the beach, and the rats invaded.

"So far, no living rats have been observed," said Bruce Woods of the U.S. Fish and Wildlife Service, noting that seven observers walked the island looking for any indication of surviving rats. "We’re cautiously optimistic, but it’s a big island. It would be presumptuous to assume that we would have noticed rats if only a few were left."

A monitoring camp was established by biologists at the island on May 26, with results of the surveys reported June 10.

During the survey, several bird species, including Aleutian Cackling Geese, ptarmigan, Peregrine Falcons, and Black Oystercatchers were observed nesting on the ten-square-mile island.

The island will be surveyed again next year, before it is considered rat-free.

The goal was to restore the populations of seabirds and other parts of the native ecosystem.

"Restoring the natural habitat will likely bring back Tufted Puffins, Storm Petrels, Song Sparrows, Glaucous-Winged Gulls, Ancient Murrelets, and so many other important breeding seabirds," according to project sponsors. "Overall, the project will benefit at least 26 species of breeding birds, including at least 13 seabird species, some of which currently breed in small numbers on Rat Island or are restricted to breeding on small offshore islets."

Rat Island – comprising 6,861 acres is not inhabited and is located in the Aleutian Island Chain about 1,300 miles west of Anchorage, Alaska - is part of Alaska Maritime National Wildlife Refuge. It was treated in September 2008 when helicopters dropped 100,000 pounds of poison bait to eliminate the invasive rats, which preyed on bird eggs, chicks and small adult birds.

The island received its name due to its population of the rodents (Rattus norvegicus).

The visiting biologists also found "157 juvenile and 29 adult glaucous-winged gull carcasses and a total of 41 Bald Eagle carcasses that appear to have died in recent months. Seventy-five percent of the eagle carcasses appear to be juvenile birds."

The specific cause of death for these birds was not known.

"Several of the gull carcasses found initially are now at the National Wildlife Health Center’s laboratory in Madison, Wisconsin, and it is estimated that information on the cause of death will be available by late June," according to project officials. "Eagle carcasses and tissue samples were picked up from Rat Island by the refuge ship Tiglax on June 10 and will be shipped to the Wildlife Health lab after the ship makes port at Adak on June 11.

"Field personnel are in the process of collecting additional tissue samples for study before destroying any remaining bird carcasses to eliminate any possibility of ongoing risk. Reports from the camp indicate that all bird species on the island except eagles are present in equal or greater numbers than were counted during pre-treatment surveys. Although adult and juvenile eagles are still present on the island, numbers of sub-adult eagles are lower than pre-treatment totals."

None of the bird deaths happened recently, and Fish and Wildlife Service officials pointed out the losses "will not significantly impact" overall Aleutian bird populations. The agency estimates some 2,500 eagles live in the Aleutians, with gull numbers far higher.

In early May, a Partners in Conservation Award was presented to Rat Island Restoration Project, by Ken Salazar, Secretary of the Department of Interior, for this eradication effort.

The $2.5 million Rat Island Restoration Project, a partnership among the U.S. Fish and Wildlife Service, the Nature Conservancy, and Island Conservation, began operations in 2008 after a two-year planning process. This included an environmental analysis by federal regulators, who issued a Finding of No Significant Impact on April 15, 2008.

"Rat Island is the third largest of 250 islands world-wide where rats have been eradicated," according to F.W.S. officials. 

Benefits of Pacific Marine Monuments for Seabirds

The recent designation of three new marine monuments by federal officials will have great benefits for seabirds of the central Pacific Ocean.

The three areas, covering 195,274 square miles, are:

¶ Marianas Trench Marine National Monument,

¶ Pacific Remote Islands Marine National Monument; and

¶ Rose Atoll Marine National Monument

"The important and precedent-setting nature of this action lies in the acknowledgment by policy-makers that pelagic - open ocean habitats are essential to seabirds for foraging and can be protected in the same way as terrestrial habitat," said Beth Flint, a biologist with the U.S. Fish and Wildlife Service.

"The estimated 14 million resident seabirds using the breeding islands and waters of the Central tropical Pacific are primarily pelagic feeders." – F.W.S. report

There are several important values associated with bird-life of the newly designated marine monuments in the central tropics.

• "The areas designated are used by over 4 million tropical seabirds that breed on Monument Islands and at least 10 million more that are pre-breeders or migrants passing through those waters on their way to Northern and Southern breeding grounds.
• "These waters are particularly important for Sooty Terns, Grey-backed Terns, Lesser Frigatebirds, and Masked Boobies surrounding islands that support over half the world’s population at some times of year.
• "The pelagic habitat (12- 200 miles) in the Central Tropical Pacific is not just the blue space on a chart but a complex and heterogeneous ocean ecosystem on which almost all life in the marine tropics depends.
• "Seabirds are dependent on obtaining their food as a result of tuna and other large predatory fish feeding near the surface of the ocean. They require the presence of these large fish to concentrate prey and force it to the surface where they can capture it.
• "During the breeding season a seabird’s success depends on the presence of tuna and other large fish foraging within 300 miles of the breeding colony.
• "A particularly high level of marine ecosystem protection (no take) within 12 miles of seabird breeding colonies is warranted because local hydrographic and biological features are particularly important environments of more concentrated productivity that most seabird species and some migratory fish species need during their reproductive phases.
• "The impact of large-scale commercial purse seine fishing goes beyond depletion of the stocks of target pelagic species to include impacts to a variety of other fish, marine turtles, and marine mammals and the reduction of tuna biomass which reduces the foraging opportunities for seabirds."

Migrants that transit the Pacific Remote Islands Marine National Monument and Rose Atoll Marine National Monument. Information courtesy of the U.S. Fish and Wildlife Service.
Mottled Petrel Murphy’s Petrel Kermadec Petrel Herald Petrel Juan Fernandez Petrel Cook’s Petrel Black-winged Petrel Stejneger’s Petrel Providence Petrel Pycroft’s Petrel Tahiti Petrel Phoenix Petrel Gould’s Petrel Collared Petrel	Pink-footed Shearwater Flesh-footed Shearwater Buller’s Shearwater Sooty Shearwater Slender-billed Shearwater Wilson’s Storm-petrel Leach’s Storm-petrel Band-rumped Storm-petrel White-throated Storm-petrel Pomarine Jaeger Parasitic Jaeger Long-tailed Jaeger South Polar Skua

"We haven't the vaguest idea how many of each of the non-breeding species use the Monument waters as systematic quantitative pelagic surveys have never been done around any of these islands," Flint said. "There are no land birds at these sites except for a few species of migratory shorebirds that winter in small numbers at each site (Bristle-thighed Curlews, Pacific Golden Plovers, Wandering Tattlers, and Ruddy Turnstones being the most numerous)."

"Closing these areas to commercial fishing may protect high densities of tuna near the breeding colonies and will reduce vessel traffic near reefs and islands thus reducing the chances of accidental groundings,” Flint said. "Shipwrecks are disastrous for these areas both because of the release of oil and the chance of introducing invasive species of land and marine organisms to these fragile communities.”

These areas - associated with national wildlife refuges - were previously protected by the agency, "so habitat for wintering shorebirds and breeding seabirds on land that was already protected in the National Wildlife Refuges remains much the same," she said.

Within the monument areas designated, are Howland Island, Baker Island, Jarvis Island, Palmyra Atoll, and Kingman Reef National Wildlife Refuges.

An announcement by Dirk Kempthorne, secretary of the Department of the Interior, on January 16th, "expanded the National Wildlife Refuge System by 54 million acres, or 58 percent, by assigning the U.S. Fish and Wildlife Service the responsibility for overall management of the three new marine national monuments in the Pacific Ocean designated by President Bush earlier this month."

Presidential proclamations detailed features for the new monuments in the Pacific:

Marianas Trench Marine National Monument (Proclamation 8335 of January 6, 2009

1) "the waters and submerged lands encompassing the coral reef ecosystem of the three northernmost islands. These islands represent some of the westernmost territory in the United States – 5,600 miles from California.

2) "the Marianas Trench. The trench, the site of the deepest place on Earth, is approximately 940 nautical miles long and 38 nautical miles wide within the Exclusive Economic Zone of the United States.

3) "a series of active undersea volcanoes and thermal vents. Twenty-one active hydrothermal submarine volcanoes and vents support life in the harshest conditions imaginable."

Pacific Remote Islands Marine National Monument (Proclamation 8336

"...protects the pristine coral reef ecosystems around Kingman Reef, Palmyra Atoll, Howland, Baker, and Jarvis Islands, Johnston Atoll, and Wake Island – the site of a pivotal battle in World War II and an important military base today."

Rose Atoll Marine National Monument (Proclamation 8337

"...protects the pristine coral reef ecosystem around a remote part of American Samoa."

Another large marine monument was designated... "On June 15, 2006, President Bush established the Northwestern Hawaiian Islands (NWHI) as the Papahanaumokuakea Hawaii Islands Marine National Monument by Presidential Proclamation 8031, providing permanent protection for the nearly 140,000 square miles of U.S. land and waters, thereby creating the world’s largest marine conservation area. The area includes the NWHI Coral Reef Ecosystem Reserve, the Midway Atoll National Wildlife Refuge/Battle of Midway National Memorial, the Hawaiian Islands National Wildlife Refuge, and the State of Hawaii’s NWHI Refuge."

The Northwestern Hawaiian Islands Marine National Monument was established in 1998, by President Bush.

An approved area management plan for Papahanaumokuakea was issued in December 2008, noting these broad focus areas as the bird component of management objectives:

1) Protect and enhance habitats for terrestrial and marine migratory birds

2) Minimize the impact of threats to migratory birds such as habitat destruction by invasive species, disease, contaminants (including oil), and fisheries interactions

3) Monitor populations and habitats of migratory birds to ascertain natural variation and to detect changes in excess of that variation that might be attributed to human activities, including anthropogenic climate change.

4) As threats are removed, restore seabird species at sites where they have been extirpated.

It is a planned process on understanding lands to be newly managed, and the process similar to that for Papahanaumokuakea will result in a management plan.

"There are no seabird surveys occurring anywhere in the Monument this spring," Flint said. "The first monitoring visit this year will be in August when standard bird surveys will be conducted at Rose Atoll. To really do a thorough job of estimating population sizes and breeding performance of tropical seabirds requires a year-round presence because of their aseasonality and asynchrony of breeding. We hope to have a year round presence at Palmyra Atoll in the future but do not at this time.

"The only research in which birds play a role now is being done by a graduate student from Stanford University named Hillary Young who is studying the role of seabirds in nutrient flow in atoll systems at Palmyra. She will be doing some fieldwork this year at Palmyra Atoll.

"The importance of these largest of the remaining populations of seabirds in the Central tropical Pacific becomes even greater as we anticipate the dramatic ecological changes to come as global climate change accelerates. Maintaining healthy populations in these remote Monuments for now will serve to facilitate restoration and re-colonization of other Pacific sites essential to these species survival in the future."

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Websites of interest.

• Papahānaumokuākea Marine National Monument
• Comments by President Bush at the January 2009 announcement of the new marine monuments
• Establishment of Three New Marine National Monuments Assisted by Information from the U.S. Geological Service; includes a map showing the location of the monuments