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Sturgeon habitat endangered as well as fish

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Atlantic sturgeon added to endangered species list

Illegal to catch, sturgeon get more federal protection

The Atlantic sturgeon, one of the world’s oldest surviving species of fish, became the newest addition to the federally protected endangered species list last week, a designation that could lead to additional protections for the fish’s habitat.

Sturgeon have been illegal to fish or keep since 1998, but dangers still remain, including unintended catching, dams that block spawning zones, poor water quality, dredging of spawning areas and vessel strikes.

See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in  science based, proven, fish protection.

The National Marine Fisheries Service, a division of the National Oceanic and Atmospheric Administration, declared the Chesapeake Bay, New York Bight, Carolina and South Atlantic sturgeon subspecies of Atlantic sturgeon as endangered. The Gulf of Maine sturgeon was listed as threatened.

A federal study of the fish in 2007 revealed populations far below historic levels. Before 1890, an estimated 180,000 adult female sturgeon spawned in the Delaware River. Today, that total is believed to be fewer than 300, according to NOAA. Historically known to spawn in 38 rivers along the Atlantic coast, today sturgeon spawn in only 20 of those rivers.

The designation followed a fall 2009 petition from the Natural Resources Defense Council.

NOAA determined the petition had merit in January 2010 and proposed that in October 2010 the species be listed as endangered. The agency held six public hearings and received comments from 119 people or organizations, some of which opposed the designation.

“The Atlantic sturgeon survived the Ice Age but is now threatened with extinction,” council senior attorney Brad Sewell said in a release. “Despite a more than decade-old ban on fishing for the sturgeon, a host of other threats — including ongoing catch in other fisheries, habitat damage, pollution and the growing effects of climate change — have proved too challenging for the species to recover. By recognizing the fish’s endangered status, the federal government is giving this remarkable fish a fighting chance to live on into the 21st century.”

Harvested since the 1870s for their caviar, Atlantic sturgeon can live past 60 years, grow to 14 feet and weigh 800 pounds, according to the release.

Technically a bony fish, the sturgeon also share many characteristics with sharks and fin fish, said David Secor, a fisheries biologist at the Chesapeake Biological Laboratory in Solomons.

“They really are amazing looking fish,” he said.

Though the fish have not spawned in state waters for decades, it is known to still reproduce in the James River in Virginia and travel north into the bay and is sometimes found, though rarely, in the Patuxent and Potomac rivers, Secor said.

“Many in the Chesapeake are visiting from other rivers and states,” he added. “They tend to be fairly far-flung.”

The primary threats to Atlantic sturgeon are fisheries, where the fish can get caught up in nets and end up as part of the harvest’s bycatch, or unintentional catch. Listing the fish as an endangered species could help reduce the number of sturgeon killed in commercial nets, Secor said.

“Sturgeon tend to poke their noses into all kinds of nets,” including gill and pound nets and even crab pots, Secor said

The designation could affect the monk fish and dogfish fisheries in particular, he added.

Secor said the designation “maybe was warranted” since bycatching is such a threat to the species, but as a part of the current efforts to restore the Atlantic sturgeon population, he described himself as “ambivalent” about the listing.

He said the ban on fishing sturgeon has been effective and that there is evidence the fish’s numbers are rebounding in the Hudson River in eastern New York and rivers throughout New England.

“South of the Chesapeake, it’s not looking too good,” Secor said.

But he called the Atlantic sturgeon a “resistant species,” as evidenced by their prehistoric descendants.

“I like to think they swam with dinosaurs,” he said.

The good news for the Atlantic sturgeon is that “they are all over the place,” Secor said.

But the bad news is that water quality in the Chesapeake Bay is so poor that the oxygen-hungry fish has a very hard time surviving there. Secor described the Atlantic sturgeon as one of the “most sensitive species of fish to low oxygen.”

jnewman@somdnews.com

25% of the fry in the lake lost to mechanical weed harvesting

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J. Aquat. Plant Manage. 37: 34-36
Vertebrates Removed by Mechanical Weed
Harvesting in Lake Keesus, Wisconsin
TRAVIS L. BOOMS

INTRODUCTION
Mechanical weed harvesting has been used to control nuisance vegetation in Lake Keesus since 1979.

Fish, turtles,and amphibians often become entangled in the vegetation
and are incidentally removed from the lake while harvesting
weeds. See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in  science based, proven, fish protection.

Mechanical harvesting removed 2 to 8% of the standing crop of juvenile fish in harvested areas in Saratoga Lake,New York (Mikol 1985) and 32% of the fish population in
harvested areas in Orange Lake, Florida, representing an
estimated replacement value of $6,000 per ha (Haller et al.
1980).

Engel (1990) found mechanical harvesting removed
21,000 to 31,000 fish per year from Lake Halverson, Wisconsin, representing 25% of the fry in the lake. Little other current information has been published concerning aquatic vertebrate removal by mechanical weed harvesting in Wisconsin. Continue reading “25% of the fry in the lake lost to mechanical weed harvesting”

How do healthy forests grow healthy fish?

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Regulatory arms race won’t protect our fish habitat and water quality

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Posted: Tuesday, February 7, 2012 8:57 am

By K.C. VanNatta For The Daily Astorian

“Surprise, surprise” writes The Daily Astorian (Jan. 17), saying that Oregon’s forest protection laws are not as strong as either California’s or Washington’s,

See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in  science based, proven, fish protection.

Continue reading “Regulatory arms race won’t protect our fish habitat and water quality”

Maine Salmon habitat making comeback

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cfjljd49 (Video)

Salmon restoration: Maine on the way to making it happen

A Maine biologist’s efforts could lead to a national Atlantic salmon recovery.

By Deirdre Fleming dfleming@mainetoday.com
Staff Writer

AVON – With a makeshift air gun fashioned with duct tape and a gas engine on a home-rigged backpack, the biologists with the Department of Marine Resources laughed as they blasted holes for hatchery eggs into a rocky tributary of the Sandy. But their work could be a part of a long-sought Atlantic salmon solution.

click image to enlarge

Paul Christman, a biologist with the Department of Marine Resources in Hallowell, places salmon eggs in a tributary of the Sandy River in Avon. With Christman are, from left, Jed Wright, with the Gulf of Maine Coastal Program, Craig Knights and Chris Domina, with U.S. Fish and Wildlife.

Photos by Gregory Rec/Staff Photographer

click image to enlarge

Salmon eggs are placed in a tube, where they will sink to the river bottom and be covered over with rocks when the tube is pulled out.

Biologist Paul Christman quietly has planted Atlantic salmon eggs in Maine rivers for three years, but in another two years his project could move to the forefront of the national Atlantic salmon recovery effort. Already the project makes Maine a leader in North America in salmon recovery, said Joan Trial, Maine’s senior salmon biologist.

“Salmon restoration has been going on quite a while. Paul is coming up with a way to produce more (salmon) spending more time in a natural environment as opposed to a hatchery. There is some strong evidence that these fish may be more successful surviving out at sea. The more time they spend in their natural habitat, the more imprinted they will be to it. This could be a piece to the puzzle, and a very intriguing piece,” said Trial.

See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in  science based, proven, fish protection.

Salmon were first listed as threatened by the U.S. Fish and Wildlife Service in 2000 in a small portion of Maine. Then in 2009, the list was expanded and the salmon’s status elevated to endangered.

Trial said the first few years Maine stocked fry in its rivers, there were encouraging results. But that was 10 years ago, and while the removal of dams since then has led to sea-run fish like alewives and herring running up Maine rivers once again, the salmon’s return has been slow.

In addition, those salmon returning are not all wild. And to be taken off the endangered species list, Maine must have wild Atlantic salmon returning to rivers here.

Currently the service is working on a recovery plan that maps out what is needed to delist the salmon. That plan will go to public comment later this year, said Antonio Bentivoglio, the service’s Atlantic salmon recovery coordinator in Maine.

But it will take at least 10 years for the necessary criteria to be met for the salmon to be delisted to threatened and then endangered status, Bentivoglio said.

“For delisting, we have to minimize the hatchery influence, so the hatchery won’t be stocking millions of par and smolts. Then we’ll have much great confidence that they are wild fish,” Bentivoglio said. “Once we get to threatened status, then we’ll have a plan in place to slowly decrease the number of hatchery fish that go out. We want to slowly reduce it, so we can assess the impact, and hopefully wild fish will increase.”

ON THE LIST

First the Atlantic salmon need to show returns of at least 6,000 in its historic ranges: Merrymeeting Bay, the Penobscot River and the Downeast rivers.

In 2010 in the Downeast rivers, just 164 Atlantic salmon returned; in the Penobscot River there were only 1,316; and 14 in Merrymeeting Bay (the Androscoggin and Kennebec rivers), Bentivoglio said.

So the recovery effort has a long way to go.

Whether Christman’s egg planting project can get DMR there is unknown. But there is a lot of hope in the offices at USFW and the Maine fishery agency because the salmon that result from the eggs he plants are considered “more wild” than the fry stocked from hatchery raised eggs.

The salmon that emerge from the eggs Christman plants are considered wild enough to be counted when the service considers whether to downgrade salmon from endangered to threatened, Bentivoglio said.

But the salmon’s international plight is complicated. Scientists still do not know why their marine survival is low, in some cases as low as 50 percent.

“(Christman’s eggs) should be more viable in their natural environment than the hatchery produced smolts. There should be more going out to sea. But we’re not sure what’s going on with marine survival and why marine survival has been so low. Something is going on out in the ocean that the United States, Iceland, Canada and Greenland are trying to figure out, too,” said Trial in Maine’s Bureau of Sea Run Fisheries and Habitat.

OUT TO SEA

The first egg planting done by Christman was in 2009. But in the Atlantic salmon’s life cycle, those fish won’t return to their native rivers, where the salmon emerge from the eggs until 2014. At that point, everyone at DMR will be watching to see if they do. If all goes well, lots of salmon should return.

In 2009, Christman planted 130,000 in the Sandy River; in 2010, he increased the number to 450,000; and again to 860,000 last year. This year, 1 million Atlantic salmon eggs will be planted in salmon habitat in Maine.

His work has shown success with survival rates. The emergence rate from eggs is upward of 40 to 50 percent in some places, he said, which is as good as egg planting projects anywhere.

But the telltale sign will be if the salmon return in 2014. Christman thinks they will return from the sea and run up Maine rivers to where he has planted eggs.

“The idea is that they are more in tune with the river than hatchery fish. Their performance should be better, and their survival better. And from what we’re seeing, yes, they are behaving much better,” Christman said.

Staff Writer Deirdre Fleming can be contacted at 791-6452 or at:

dfleming@pressherald.com

Twitter: Flemingpph

Suspended Spawning Platforms

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See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in  science based, proven, fish protection.

https://docs.google.com/a/nmbfn.com/viewer?a=v&pid=sites&srcid=bm1iZm4uY29tfHd3d3xneDo3ZDEyNGI3NDNjYzU3Nzk4

Sturgeon need more fish habitat

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Environment File

JORDAN VERLAGE/St. Albert Gazette

JORDAN VERLAGE/St. Albert Gazette
Scientists say some 600 fish found dead this week by the sewer outfall closest to the city’s cenotaph likely died of winterkill from a lack of oxygen in the Sturgeon River.

Science team spots fish kill

Local scientists had their sleuthing hats on this week after hundreds of silvery fish turned up dead in the Sturgeon River. See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in  science based, proven, fish protection.

Public works staff and researchers from the Northern Alberta Institute of Technology (NAIT) recovered several sack-loads of dead fish from a sewer outfall by St. Albert Place Thursday morning.

A man walking a dog first spotted the fish last weekend, says Laurie Hunt, the associate chair of biological science technology at NAIT who is running a 10-year study of the Sturgeon River. The unidentified man alerted a team of NAIT researchers who happened to be taking water samples on the river at the time, and they investigated.

The team found roughly 600 dead fish by the sewer outfall closest to the city’s cenotaph, Hunt says — some floating in the open water, others frozen under the ice. “The whole little channel was full of them.” While most were minnow-sized sticklebacks, there were also a fair number of larger fish such as northern pike and white sucker.

Hunt told city officials on Wednesday, who in turn called in Alberta Fish and Wildlife fisheries biologist Daryl Watters.

Watters, who examined the site, says the fish appear to be victims of winterkill — a relatively common occurrence in shallow rivers like the Sturgeon.

“It’s unfortunate, since you don’t want to see young small fish like that taken out before they can contribute, but it happens.”

Winterkill happens when fish crowd into too small an area, such as the small bit of open water by most outfalls, use up all the oxygen there and die. Readings taken by the NAIT team suggest that the water next to the outfall has much more oxygen in it than that in the rest of the Sturgeon, which may have attracted the fish.

The NAIT team has collected the fish with the province’s permission for further study, Hunt says. The team is studying the sex ratios of fish in the Sturgeon to check for signs of gender-bending pollutants.

“We didn’t have a lot of success catching fish this summer,” she says, but this discovery has handily solved that problem.

Winterkill incidents like this illustrate the importance of having diverse fish habitat, Hunt says — if the Sturgeon had a better mix of shallow and deep spots, these fish may have had a better chance of surviving.

“It also emphasizes the importance of beavers,” she adds, as their dams create deep, oxygenated pools in which fish can survive over winter.

 

Bluegill habitat moves to artificial products to attract more fish

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Bluegill Habitat

When you go bluegill fishing habitat is one of the key factors on your mind when deciding where to go to find fish to catch. Some bodies of waters are habitat rich with aquatic plants, dead falls, stumps and so on. Other ponds either never had good structures for habitat or they rotted and decomposed long ago. One option is to sink more structures with items from around the house for little or no cost such as old Christmas trees, pallets or scrap wood formed into a 3D design. These structures are great for a while, but they eventually break down or change until they are no longer a desired location for bluegill to gather.

See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in  science based, proven, fish protection.

http://www.bluegillworld.com/bluegill-habitat.html

Mississippi fish attractor rules and regulations for placing fish habitat

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See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in  science based, proven, fish protection.

http://www.mdwfp.com/media/41179/f11_3428_sport_fish.pdf

DNR continues fish crib project on Cedar Lake

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It’s a cold crisp Saturday morning in mid-January and the ice off the north boat landing on Cedar Lake is alive with the sounds of chain saws and Bobcats.

 image
Volunteers line up the lumber for a fish crib. See the dozens of unique artificial fish habitat models, fish attractors and fish cover used at fishiding.com, the leader in  science based, proven, fish protection.

It’s a cold crisp Saturday morning in mid-January and the ice off the north boat landing on Cedar Lake is alive with the sounds of chain saws and Bobcats.

On the horizon, shantytowns harbor diehard fishermen trying their luck through 16 inches of ice. However, the largest and loudest population on the ice this morning consists of volunteers from Star Prairie Fish & Game and the Cedar Lake Management District, along with concerned local anglers, who are working together with staff from the Wisconsin Department of Natural Resources constructing 45 new fish cribs.

John Bush, a volunteer from SPF&G, sits behind the wheel of a four wheeler waiting for a crew of his fellow volunteers to position one of the completed cribs on his sled. His job is to tow cribs to one of three staging areas located on the south end of the lake.

Wearing a fashionable blue hardhat and bright green safety vest, Barbara Scott with the DNR props herself up against several rods of rebar.

Surrounding her are numerous cribs in various stages of completion. They look like miniature log houses with no roofs stuffed full of brush and tree branches.

Scott explains part of the process; The logs are placed on top of each other leaving about an eight-inch gap between each layer.

“Once the logs are in place, we bend the tops of the rebar over to hold it all together,” Scott said. “Then we place branches in between the layers to create the fish habitat. After the cribs have been towed into place, we tie cinder blocks on top to prevent them from moving once they sink.”

The cribs will sit in place out on the ice until spring thaw. As the ice melts, the cribs slowly settle into place at the bottom of the lake.

Fish techs from the DNR were out on the lake in the fall determining the precise locations where the cribs would be located.

Daryl Berg, with a pipe in hand, is hard at work bending rebar. Besides being a self-appointed “log loader and brush builder,” Berg is a local fisherman who makes time to help with this project because he “cares about the fish habitat.”

Marty Engel is a biologist with the DNR’s Lower Chippewa and Central Wisconsin Fisheries Team. He operates out of the DNR office in Baldwin and this morning he’s in charge of making sure the cribs are correctly constructed and delivered to the correct locations. The plan is to sink up to 500 cribs throughout Cedar Lake over the course of the next 10 to 20 years.

“Cedar Lake is clear enough to grow weeds in the spring, but by around June 15th, the algae begins to come on strong. When the lights go out, the plants don’t grow,” Engel said. “By mid-July the weeds are starting to die back and by August they’ve all but died off. Cribs are one way to create alternate habitat in green lakes.”

Creating log cribs provides a place for fish to migrate to when the weeds die off. According to Engel, the center of the cribs provides cover for smaller fish like bluegills, perch and crappies, while the extended branches on the perimeter provide hunting areas for larger species like northern pike, walleyes and muskies.

“Once they go through the ice, fish will gravitate to them instantaneously,” he said.

The results of the project have been promising.

“There wasn’t a lot of good pan fishing on this lake 10 years ago,” Engel recalls, “But now you can tell the results just by seeing the number of ice shacks out on the lake and talking with the people.”

Ever wonder why all the shacks seem to congregate in just a few areas on the lake? Individual cribs are installed in “colonies” to mimic habitat like a weed bed.

By the end of the day, Cedar Lake will be home to numerous colonies consisting of 325 individual cribs. The fish, both predator and prey, move to where the colonies are. The fishermen follow the fish resulting in a landscape of shantytowns right on top of the cribs.

Marty reports that the DNR working in conjunction with several other volunteer groups, including students from Somerset High School, is starting crib construction initiatives on two other local lakes, Bass and Glen. In addition to the winter crib construction programs, the DNR will also be creating “near-shore” structure on Bass Lake once the water opens up by dragging 80 oak trees out into the lake so that the crowns of the trees rest in about eight feet of water.

By: By Tom Lindfors, New Richmond News

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