Navigation Links
Coho salmon: Pinks' and chums' eating cousin

Newly published research co-authored by scientists at Simon Fraser University and the Raincoast Conservation Foundation shows juvenile coho salmon benefit from dining on the distant remains of their spawning pink and chum cousins.

While juvenile coho salmon feed directly on spawning pink and chum salmon carcasses and eggs, even coho with no direct contact with spawning pink and chum benefit from their nutrient contributions to stream ecosystems.

The new research shows that juvenile coho abundance is up to three times higher in streams with abundant pink and chum compared to streams with none.

John Reynolds, an SFU biologist, and Michelle Nelson, one of his doctoral students, have just had their paper Time-delayed subsidies: Interspecies population effects in salmon published in PLOS ONE, an international peer-reviewed journal.

The authors say their discovery underscores the importance of understanding how a fish's nutrient legacy in streams and forest ecosystems affects species close and distant to them.

The paper's lead author Nelson says: ""We found an indirect link between spawning pink and chum salmon, and juveniles of another species, coho." The paper is one chapter of her thesis.

The carcasses of dead pink and chum salmon that have spawned in freshwater fertilize stream and forest ecosystems. The food web pathway may go from carcasses to algae to stream-insects and then to coho. Even more fascinating is a pathway that may go from carcasses to forest flies to coho.

"We know this isn't just because all three species benefit from being in nutrient-rich streams," says Reynolds, SFU's Tom Buell BC Leadership Chair in Salmon Conservation. "The habitat needs of pink, chum and coho are slightly different, and even taking habitats into account, the effects of coho dining on nutrients enriched by pink and chum remains are very clear."

"I hope this will highlight to fisheries decision-makers the ecological benefits of robust populations of spawning salmon," says Nelson. "Pink and chum salmon have less commercial and recreational value than coho. But their crucial contribution to stream ecosystems may benefit the health of coho populations."

Reynolds adds: "These findings are relevant to many people, considering the strong interest and connection many have with salmon. It also speaks directly to the federal Department of Fisheries and Oceans' commitment to incorporate a better understanding of salmon-ecosystem interactions into fisheries management to conserve and restore salmon abundance in our region."


Contact: Carol Thorbes
Simon Fraser University

Related biology news :

1. Technology using microwave heating may impact electronics manufacture
2. Mechanism of cell death unraveled -- perspectives for treating inflammatory diseases
3. Marijuana shows potential in treating autoimmune disease
4. Eating prunes can help weight loss
5. A new approach to treating peanut and other food allergies
6. New species of metal-eating plant discovered in the Philippines
7. Grape skin extract may soon be answer to treating diabetes
8. Mouse study points to potentially powerful tool for treating damaged hearts
9. Eating rice boosts diet quality, reduces body weight and improves markers for health
10. Devil in disguise: A small coral-eating worm may mean big trouble for reefs
11. Two researchers known for identifying and treating bubble boy disease honored by March of Dimes
Post Your Comments:
Related Image:
Coho salmon: Pinks' and chums' eating cousin
(Date:4/15/2016)... , April 15, 2016  A new partnership ... more accurate underwriting decisions in a fraction of ... competitively priced and high-value life insurance policies to ... With Force Diagnostics, rapid testing (A1C, ... data readings (blood pressure, weight, pulse, BMI, and ...
(Date:3/31/2016)... 2016   LegacyXChange, ... "Company") LegacyXChange is excited to release its ... to be launched online site for trading 100% guaranteed ... will also provide potential shareholders a sense of the ... an industry that is notorious for fraud. The video ...
(Date:3/22/2016)... 2016 According to ... for Consumer Industry by Type (Image, Motion, Pressure, ... & IT, Entertainment, Home Appliances, & Wearable ... 2022", published by MarketsandMarkets, the market for ... USD 26.76 Billion by 2022, at a ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... , June 24, 2016 Epic Sciences ... detects cancers susceptible to PARP inhibitors by targeting ... cells (CTCs). The new test has already been ... in multiple cancer types. Over 230 ... damage response pathways, including PARP, ATM, ATR, DNA-PK ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... its second eBook, “Clinical Trials Patient Recruitment and Retention Tips.” Partnering with experienced ... this eBook by providing practical tips, tools, and strategies for clinical researchers. , ...
(Date:6/23/2016)... June 23, 2016 /PRNewswire/ - FACIT has announced ... biotechnology company, Propellon Therapeutics Inc. ("Propellon" ... commercialization of a portfolio of first-in-class WDR5 inhibitors ... such as WDR5 represent an exciting class of ... precision medicine for cancer patients. Substantial advances have ...
(Date:6/23/2016)... ... June 23, 2016 , ... Charm Sciences, Inc. is pleased ... received AOAC Research Institute approval 061601. , “This is another AOAC-RI approval of ... Salter, Vice President of Regulatory and Industrial Affairs. “The Peel Plate methods perform ...
Breaking Biology Technology: