Evidence for reproductive senescence in a broadly distributed harvested marine fish
Bibliographic record
Abstract
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 592:207-224 (2018) - DOI: https://doi.org/10.3354/meps12532 Evidence for reproductive senescence in a broadly distributed harvested marine fish Hugues P. Benoît1,2,6,*, Douglas P. Swain1, Jeffrey A. Hutchings2, Derek Knox3, Thomas Doniol-Valcroze4,7, Christina M. Bourne5 1Fisheries and Oceans Canada, Gulf Fisheries Centre, Moncton, NB E1C 9B6, Canada 2Department of Biology, Dalhousie University, Halifax, NS B3H 4J1, Canada 3Fisheries and Oceans Canada, St. Andrews Biological Station, 531 Brandy Cove Road, St. Andrews, NB E5B 2L9, Canada 4Fisheries and Oceans Canada, Maurice Lamontagne Institute, Mont Joli, QC G5H 3Z4, Canada 5Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre, St. John's, NL A1C 5X1, Canada 6Present address: Fisheries and Oceans Canada, Maurice Lamontagne Institute, Mont Joli, QC G5H 3Z4, Canada 7Present address: Fisheries and Oceans Canada, Pacific Biological Station, Nanaimo, BC V9T 6N7, Canada *Corresponding author: hugues.benoit@dfo-mpo.gc.ca ABSTRACT: Senescence is the physiological deterioration of adult organisms leading to an age-specific decline in fitness principally associated with an increase in mortality rate (actuarial senescence) and decline in fecundity (reproductive senescence). Senescence is common in natural populations of many taxa; however, there are few examples among fishes, even though they are the most speciose vertebrates and comprise a disproportionate number of long-lived animal species. A notable example in fish is Norwegian spring-spawning Atlantic herring Clupea harengus, which experiences actuarial senescence. Given expected associations between actuarial and reproductive senescence, Atlantic herring likely also experience reproductive senescence. We examined biological data obtained over 4 decades for 15 Canadian Atlantic herring stocks for evidence of reproductive senescence. Age- and length-specific increases in the relative frequency of morphologically non-reproductive herring and age-related decreases in reproductive investment were consistent with reproductive senescence in both sexes, combined with a post-reproductive increase in growth rate. Available evidence was not consistent with 2 alternative hypotheses: delayed maturation combined with higher survival for late-maturing fish, or an increasing frequency of skipped spawning with age. Although the incidence of post-reproductive herring was generally low, this was likely because very few individuals survive to older ages due to fishing. The present study presents the first strong example of reproductive senescence in a marine fish, notably one that is both ecologically important and a target of large fisheries throughout its range. KEY WORDS: Atlantic herring · Clupea harengus · Senescence · Post-reproductive · Life history · Lifetime reproductive value Full text in pdf format Supplementary material PreviousNextCite this article as: Benoît HP, Swain DP, Hutchings JA, Knox D, Doniol-Valcroze T, Bourne CM (2018) Evidence for reproductive senescence in a broadly distributed harvested marine fish. Mar Ecol Prog Ser 592:207-224. https://doi.org/10.3354/meps12532 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 592. Online publication date: March 29, 2018 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2018 Inter-Research.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.002 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.003 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".