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Tag: trout habitat

Fish love Snags and snags create habitat

Posted on by david

Re-snagging the Goulburn to increase native fish habitat and improve recreational fishing opportunities between Seymour and Nagambie.

The Goulburn Broken Catchment Management Authority (CMA) is working along the Goulburn River between Seymour and Nagambie in the coming weeks to increase the amount of large woody habitat, or snags, in the Goulburn River, with the aim to increase in the native fish population and diversity in this section of the river.

Funded by the Victorian Government, through revenue from Recreational Fishing Licenses to improve recreational fishing in Victoria and the Goulburn Broken CMA, the snags are being placed in the Goulburn River, downstream of the Hume Freeway Bridge near Seymour. The works that are being carried out will lead to an increase in habitat for native fish in the area and an improvement in catch rates for recreational fishers.

Goulburn Broken CMA River Health Projects Coordinator, Mr Jim Castles explains, “Native fish rely heavily upon instream habitat such as tree roots, logs and branches called ‘snags’. Since European settlement, our streams and rivers have been de-snagged, in the belief this would increase water flow and quality. We now know this is not the case.”

Native fish ecologists from the Murray Darling Basin Authority estimate that fish populations have declined by 90% since European settlement. There have been many threats to native fish including removal of in-stream and riparian habitat and flow modification.

Snags are the inland equivalent of coastal reefs and provide habitat for native fish and other animals such as tortoises and native water rats. Native fish use them to shelter from fast currents and sunlight and take refuge from predation. Native fish also use snags as feeding and spawning sites, and as nursery areas for juvenile fish.

Recent fish surveys within the Murray Darling Basin have found that 80% of Murray Cod are found within 1 metre of a snag. All large bodied freshwater native fish use snags as habitat.

“Re-snagging is a sound management intervention we can use to restore native fish habitat to our waterways, and results so far suggest that native fish populations respond strongly as a result. Re snagging on its own, however, is unlikely to be the sole driver in native fish recovery in the Goulburn River. The key is to better manage our riparian zones by fencing to restrict stock access and protect native vegetation, and revegetating degraded areas so there will be a constant natural supply of snags in the future” says Mr. Castles. 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 areas to be re-snagged have been identified via in-stream habitat mapping undertaken in 2011 by scientists from the Arthur Rylah Institute (ARI) in the Goulburn River between the Mitchellstown and Hume Freeway Bridges to identify areas that have a low density of snags. The sites where the Goulburn CMA carry out re-snagging are being selected based on priority zones identified by ARI as a result of this mapping, and access to the waterway within these zones.

The fallen trees used for the re-snagging project have been sourced from a number of nearby locations, including the Nagambie Bypass and a public reserve in Seymour. The Goulburn Broken CMA and its contractors work to rigorous guidelines that have been developed in other locations where re-snagging has been carried out over many years.

“The snags will be secured safely and positioned in a way that does not block the river channel to ensure fishing boats can still travel along the river,” explains Mr Castles “The snags will have very little or no net impact on water flow and will enhance native fish habitat, thereby leading to a more robust native fish community, which will result in huge benefits for recreational fishers in our region.”

This project is funded by the Department of Primary Industries Recreational Fishing Licence Grants Scheme, which uses revenue raised from the sale of recreational fishing licences to fund projects that directly improve recreational fishing in Victoria.

Snags on the riverbank prior to placement. Photo: Jim Castles, Goulburn Broken CMA

Fraser River fish habitat threatened by gravel extraction

Posted on by david

  Fraser River fish habitat threatened by gravel extraction

Approximately 280,000 cubic metres of gravel accumulated in the active channel of the river, this was largely offset by significant losses (4 million cubic meters) of over-bank sand on islands and river edges, resulting in little net gain of sediment. (Credit: janheuninck via Flickr)

B.C.’s Fraser River has become the battleground for the gravel industry and conservation groups fighting to protect one of the world’s most productive fish habitats. 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 Fraser has been a source of gravel for B.C. construction for decades. However, Fisheries and Oceans Canada (DFO) placed a moratorium on gravel extraction in the mid 1990s due to concerns about fish and fish habitat. Not long after the freeze, the B.C. Provincial government began to argue that gravel removal from the Fraser was necessary for flood protection as “massive” gravel accumulations were, allegedly, causing the river bed to rise. A series of public meetings was held to debate the issue and experts were called in to assess the scope of the problem.

Dr. Michael Church, a professor of Geography at the University of British Columbia, provided the most compelling testimony on how gravel and sand enter and move through the gravel reach. He estimated that while approximately 280,000 cubic metres of gravel accumulated in the active channel of the river, this was largely offset by significant losses (4 million cubic meters) of over-bank sand on islands and river edges, resulting in little net gain of sediment.

The B.C. government and proponents of the gravel industry incorrectly interpreted this to mean that 280,000 cubic meters of gravel and sand entered the gravel reach each year and merely “piled up” in the river causing a rise in riverbed elevation that would, over time result in increased flood risk. These groups argued that lives and property were at risk and pushed for DFO to lift the moratorium on gravel extraction.

In 2004, a five-year federal-provincial agreement was reached to allow removal of up to 500,000 cubic metres of gravel in each of the first two years and up to 420,000 cubic metres in the following three years. The agreement was touted as a long-term plan for reducing the flood hazard risk in the lower Fraser River.

Critics argued that gravel removal was only taking place in areas where it was easily accessible to industry and that removal from the targeted areas provided no flood protection benefits whatsoever. In addition, fish and fish habitat were paying the price. In one case, at a location known as Big Bar, removal operations undertaken in 2006 resulted in the de-watering of thousands of salmon redds (nests) and the demise of possibly millions of young salmon which were just about to emerge from the gravel. There was evidence to suggest that similar losses of fish had occurred at other sites as well.

The Fraser River is also home to the white sturgeon, listed by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) as endangered, with gravel removal identified as one of the key threats affecting this species.

By David Suzuki.org

Reconnecting Habitat on Wyoming’s Salt River

Posted on by david

Salt River Diversion Dam
This diversion dam on Wyoming’s Salt River seems pretty low, but it was blocking
access to vital spawning habitat for some trout and other native fish.
 
photo courtesy Trout Unlimited

Across the West, many rivers and watersheds are fragmented by old diversion dams and other irrigation infrastructure. That’s a big problem for trout, which need access to the full range of river habitat in order to thrive. For Trout Unlimited, upgrading these obsolete or inefficient irrigation systems offers a tremendous opportunity to restore rivers. With the help of Orvis funding, TU recently completed an exciting “reconnection” project on the Salt River in west-central Wyoming that should boost both the fish habitat and the fishing.  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 Salt River is home to native Yellowstone cutthroat trout, as well as wild rainbows and browns. But they faced a big obstacle: an aging, solitary diversion dam imposed a two-foot-high vertical barrier to fish movement. While adult fish could likely clear the hurdle most of the year, smaller trout and other native species weren’t able to move upstream.

Salt River Fish Ladder
The new fish ladder (in foreground) is a low-tech, low-maintenance solution that
will open some 21 miles of habitat to spawning fish.
 
photo courtesy Trout Unlimited

TU’s Jim Gregory, working with Wyoming Game and Fish and the Eastside Canal Company, saw a golden opportunity to retrofit the structure with a fish ladder and open up some 21 miles of mainstem river habitat. This fall, TU and its partners—including the Wyoming Wildlife and Natural Resource Trust and the U.S. Forest Service—constructed a rock-ramp type fish ladder on the southern side of the diversion structure that provides a low-velocity, low-gradient passageway using a design that is simple, stable, and low-maintenance. The completed ladder allows all native fish species to clear the diversion hurdle and access upstream tributaries—such as Willow Creek, Stump Creek, and Crow Creek—which provide critical spawning and rearing habitatfor native fish.

Sometimes, as on the Salt River, removing a single barrier can dramatically improve miles of habitat for fish. TU is working on dozens of these infrastructure upgrade projects that offer some of the best opportunities to restore rivers for wildlife. As far as we know, no one is making any new rivers, but this might be the next best thing.

For more information on the Orvis/TU Culvert Fund, visit the Orvis Commitment page.

Randy Scholfield is the Director of Communications/Western Water Project for Trout Unlimited. 

10,000 New Anglers A Year Increasing Fish Habitat?

Posted on by david
Grow fly-fishing.
Girls Fishing

That’s the mantra of the fly-fishing industry, which has admittedly been flat since the A River Runs Through It electricity died sometime in the 1990s.

Fly-fishing growth would provide multiple benefits, and not just to a manufacturer’s, retailer’s or guide’s bottom line. More fly fishers, in fact, could increase fish-habitat and fisheries-resource stewardship, and that means more quality water and desirable fishing for all of us. Unfortunately, growing fly-fishing may be the single most difficult task the industry has, and nobody seems to have a clear answer on how to get newbie anglers onto the water and enjoying rewarding outings.

Fortunately, The Orvis Company has a plan, and they implemented it in 2011 with a goal of bringing 10,000 new people into fly-fishing each year. And according to Tom Rosenbauer, the company’s rod and tackle marketing director, they did just that in the past 12 months.

“With the help of Trout Unlimited and the Federation of Fly Fishers, we put together a two-stage instructional program, fly-fishing 101 and 201 classes,” said Rosenbauer. “The 101 class is free and the curriculum covers the basics—flyrod parts, casting, rigging and essential knots, and our 201 is actually a mini guided trip to a local waterway, normally private water, such as a local bass/bluegill pond, or a recently stocked river or creek. That gives the angler a real shot at catching his or her first fish on the fly.”

Rosenbauer says the major roadblock for most prospective fly fishers is simply carving out the time.

“There is a pent-up interest in fly-fishing among anglers who spin-fish,” Rosenbauer explained. “We are giving these individuals a chance to take just two hours out of their schedule, and as close to home as possible. They can register for the classes at either an Orvis store or at a participating Orvis tackle dealer.”

Not all Orvis dealers (fly shops) are teaching the classes, which comes as a surprise to Rosenbauer.

“Why wouldn’t a shop owner see the value in bringing more folks into the fold? They are the shop’s potential new customers,” mused Rosenbauer.

As hoped, families are coming into the program together. In fact, Orvis instructors report having had young anglers with fathers and grandfathers in class together. And as expected, the majority of those students were new to the sport. 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.

As for the common complaint that too many fly fishers puts harmful pressure on already crowded, hard-fished waters, and popular trout streams in particular, Rosenbauer had this to say:

“We are aware of that, so our emphasis is promoting fly-fishing on local waters, something close to home. That translates into more regular participation, and taking on fish easier to catch, such as panfish, bass and carp, which are really not appreciated by many. This goes for saltwater fisheries, too. The list of aggressive, easy-to-access species is impressive, and many can be caught from shore on a fly with basic equipment.”

From January through February, 2012, Orvis will conduct introductory fly-tying classes at all Orvis stores. For more information, visit www.orvis.com

  • By: Mike Conner
  • Photography by: Tom Rosenbauer

Workers work on building LUNKER fish structures near Bear Valley Creek

Posted on by david

Franklin: Work on Bear Creek will pay off for trout anglers 

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