Phenology and fitness of Calanus glacialis, C. finmarchicus (Copepoda), and their hybrids in the St. Lawrence Estuary
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 524:1-9 (2015) - DOI: https://doi.org/10.3354/meps11240 FEATURE ARTICLE Phenology and fitness of Calanus glacialis, C. finmarchicus (Copepoda), and their hybrids in the St. Lawrence Estuary Geneviève J. Parent1,*, Stéphane Plourde2, Pierre Joly2, Julie Turgeon1 1Québec-Océan, Département de Biologie, Université Laval, Quebec City, Quebec, Canada 2Maurice-Lamontagne Institute, Fisheries and Oceans Canada, Mont Joli, Quebec, Canada *Corresponding author: genevieve.parent.5@ulaval.ca ABSTRACT: Hybrids between 2 abundant copepod species, Calanus glacialis and C. finmarchicus, were recently detected along the Atlantic and Arctic Canadian coast. Hybridization may affect population dynamics and, thus, impact local productivity. Our study aims to characterize the effect of hybridization on Calanus demography by comparing the in situ reproductive phenology and fitness of parental species and their hybrids. Environmental conditions were monitored and adult Calanus females were sampled in the upper layer in the St. Lawrence Estuary every second week from the pre-bloom (March to May) to bloom period (June to July) in 2010. Maximal abundance of hybrids (17%) occurred in April between the maxima of C. glacialis (March) and C. finmarchicus (June). The different reproductive phenology of hybrids and parental species likely reduces interspecific gene flow. Contrastingly, fitness components such as the egg production rate of hybrids matched those of their maternal ancestor over the sampling interval. Still, hybrids represented only 10% of total abundance, and their population-based egg production rate was always smaller than that of one parental species. The pre-bloom conditions during the peak abundance of hybrids may partially explain their small reproductive output in that area. Consequently, the impact of hybridization on the parental species’ population size seems small in 2010 in the St. Lawrence Estuary. However, long-term and spatial surveys are required to conclude on the general effect of hybridization on the population size of parental species over the vast area where they co-occur. KEY WORDS: Life history traits · Reproductive output · Egg production rate · Females · Copepod · Hybridization Full text in pdf format Information about this Feature Article NextCite this article as: Parent GJ, Plourde S, Joly P, Turgeon J (2015) Phenology and fitness of Calanus glacialis, C. finmarchicus (Copepoda), and their hybrids in the St. Lawrence Estuary. Mar Ecol Prog Ser 524:1-9. https://doi.org/10.3354/meps11240 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 524. Online publication date: March 30, 2015 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2015 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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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".