NDLI: Recent Salmon Declines: A Result of Lost Feeding Opportunities Due to Bad Timing?

Content Provider	PubMed Central
Author	Chittenden, Cedar M. Jensen, Jenny L. A. Ewart, David Anderson, Shannon Shannon, Balfry Downey, Elan Eaves, Alexandra Sonja, Saksida Smith, Brian Vincent, Stephen Welch, David Mckinley, R. Scott
Editor	Bograd, Steven J.
Abstract	As the timing of spring productivity blooms in near-shore areas advances due to warming trends in global climate, the selection pressures on out-migrating salmon smolts are shifting. Species and stocks that leave natal streams earlier may be favoured over later-migrating fish. The low post-release survival of hatchery fish during recent years may be in part due to static release times that do not take the timing of plankton blooms into account. This study examined the effects of release time on the migratory behaviour and survival of wild and hatchery-reared coho salmon (Oncorhynchus kisutch) using acoustic and coded-wire telemetry. Plankton monitoring and near-shore seining were also conducted to determine which habitat and food sources were favoured. Acoustic tags (n = 140) and coded-wire tags (n = 266,692) were implanted into coho salmon smolts at the Seymour and Quinsam Rivers, in British Columbia, Canada. Differences between wild and hatchery fish, and early and late releases were examined during the entire lifecycle. Physiological sampling was also carried out on 30 fish from each release group. The smolt-to-adult survival of coho salmon released during periods of high marine productivity was 1.5- to 3-fold greater than those released both before and after, and the fish's degree of smoltification affected their downstream migration time and duration of stay in the estuary. Therefore, hatchery managers should consider having smolts fully developed and ready for release during the peak of the near-shore plankton blooms. Monitoring chlorophyll a levels and water temperature early in the spring could provide a forecast of the timing of these blooms, giving hatcheries time to adjust their release schedule.
Related Links	http://dx.doi.org/10.1371/journal.pone.0012423
Starting Page	12423
File Format	PDF
ISSN	19326203
e-ISSN	19326203
Journal	PLoS ONE
Issue Number	8
Volume Number	5
Language	English
Publisher	Public Library of Science
Publisher Date	2010-08-01
Access Restriction	Open
Rights Holder	Public Library of Science
Subject Keyword	Biochemistry, Genetics and Molecular Biology(all) Agricultural and Biological Sciences(all) Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Lost Working Years Due to Mental Disorders: An Analysis of the Norwegian Disability Pension Registry

Years of Life Lost Due to External Causes of Death in the Lodz Province, Poland

Timing of Enteral Feeding in Cerebral Malaria in Resource-Poor Settings: A Randomized Trial

How sea lice from salmon farms may cause wild salmonid declines in Europe and North America and be a threat to fishes elsewhere

Fitness reduction and potential extinction of wild populations of Atlantic salmon, Salmo salar, as a result of interactions with escaped farm salmon.

Genetic change for earlier migration timing in a pink salmon population

Alternate Directed Anthropogenic Shifts in Genotype Result in Different Ecological Outcomes in Coho Salmon Oncorhynchus kisutch Fry

Timing of Pathogen Adaptation to a Multicomponent Treatment

Personal and Societal Health Quality Lost to Tuberculosis

Recent Salmon Declines: A Result of Lost Feeding Opportunities Due to Bad Timing?

Similar Documents

Lost Working Years Due to Mental Disorders: An Analysis of the Norwegian Disability Pension Registry

Years of Life Lost Due to External Causes of Death in the Lodz Province, Poland

Timing of Enteral Feeding in Cerebral Malaria in Resource-Poor Settings: A Randomized Trial

How sea lice from salmon farms may cause wild salmonid declines in Europe and North America and be a threat to fishes elsewhere

Fitness reduction and potential extinction of wild populations of Atlantic salmon, Salmo salar, as a result of interactions with escaped farm salmon.

Genetic change for earlier migration timing in a pink salmon population

Alternate Directed Anthropogenic Shifts in Genotype Result in Different Ecological Outcomes in Coho Salmon Oncorhynchus kisutch Fry

Timing of Pathogen Adaptation to a Multicomponent Treatment

Personal and Societal Health Quality Lost to Tuberculosis

Recent Salmon Declines: A Result of Lost Feeding Opportunities Due to Bad Timing?