Fisheries Management and Ecology

[Derby]

Subject: Fisheries Management and Ecology | Aquatic Biology Journal | Wiley Online Library



Recent online paper about affects of hatcheries on steelhead and salmon

https://onlinelibrary.wiley.com/doi/full/10.1111/fme.12643

 

[OldBlackDog]

. In conclusion, while there is a long history of debate over the widespread use of hatcheries, our results were consistent with prior reviews by Miller et al. (1990) and Araki and Schmid (2010), the combination of which clearly indicate that, from a scientific standpoint, hatcheries typically pose numerous risks that commonly result in negative impacts to the diversity, productivity, and abundance of wild salmonid populations. These negative impacts likely limit the efficacy of habitat restoration efforts aimed at rebuilding wild salmonid populations and the adaptive capacity of wild salmonids to keep pace with a changing environment, especially climate warming

 

[searun]

Follow the $$ - says a lot about the potential hypothesis the authors explored.​

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ACKNOWLEDGMENTS​

The vast majority of project funding for the lead author was provided by Trout Unlimited, with additional funding via the Wild Steelhead Coalition and The Conservation Angler. We extend sincere thanks to Matt Mayfield for Figure 1, Craig Busack for early discussions and comments, Martin Liermann for assistance with R in generating an accessible database, and two anonymous reviewers for their constructive criticisms.

 

[wildmanyeah]

Hatcheries can also benefit wild salmonids, though the situations appear nuanced. For instance, hatcheries have helped re-establish extirpated populations of salmonids (Galbreath et al., 2014), prevent extinction (Kline & Flagg, 2014), and jump-start recolonization following dam removal (Liermann et al., 2017). While those efforts did not meet the criteria for inclusion in our synthesis (e.g., effects on wild fish could not, or were not, evaluated due to extirpation or near extinction levels of abundance),

 

[chris73]

As demonstrated many times, hatcheries are essential in near urban compromised streams. There, without hatcheries, salmon will disappear. Hatcheries can do harm in remote streams with a healthy wild salmon population.

 

[OldBlackDog]

How we killed off the giant salmon of the Pacific Northwest in 50 years

Natural abundance has its limits, especially when you dam the path to the breeding grounds-- as was the case with the giant Chinook salmon of the Pacific northwest.…

vimeo.com

 

[SpringVelocity]

The giant Pacific Salmon still exists. It's just in South America. That still is interesting. Those really were hatchery transplants from a number of streams in Pacific Northwest. Transplanted in 70s.

Seems to be completely booming there. Is it really the hatchery fish doing harm or the environment up here? You would think South America would see same declines and small fish. Nope doesn't seem to be case.

Polyphyletic ancestry of expanding Patagonian Chinook salmon populations - Scientific Reports

Chinook salmon native to North America are spreading through South America’s Patagonia and have become the most widespread anadromous salmon invasion ever documented. To better understand the colonization history and role that genetic diversity might have played in the founding and radiation of...

www.nature.com

 

[Whole in the Water]

. In conclusion, while there is a long history of debate over the widespread use of hatcheries, our results were consistent with prior reviews by Miller et al. (1990) and Araki and Schmid (2010), the combination of which clearly indicate that, from a scientific standpoint, hatcheries typically pose numerous risks that commonly result in negative impacts to the diversity, productivity, and abundance of wild salmonid populations. These negative impacts likely limit the efficacy of habitat restoration efforts aimed at rebuilding wild salmonid populations and the adaptive capacity of wild salmonids to keep pace with a changing environment, especially climate warming

These references are 34 and 24 years old! Lots of new and much improved hatchery science and methods that can help reduce many of the traditional negative impacts of hatcheries. Unfortunately the cheap, myopic, dinosaurs at DFO are slow to adapt many of these improved techniques. We need to get them to adopt improved hatchery methods ASAP.