Laboratory studies of the effect of temperature on growth, moulting and reproduction in the co-occurring mysids Neomysis integer and Praunus flexuosus
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 235:177-188 (2002) - doi:10.3354/meps235177 Laboratory studies of the effect of temperature on growth, moulting and reproduction in the co-occurring mysids Neomysis integer and Praunus flexuosus Gesche Winkler1,*, Wulf Greve2 1Département de Biologie, Université Laval, Sainte-Foy, Québec G1K 7P4, Canada 2Forschungsinstitut Senckenberg, Notkestraße 31, 22607 Hamburg, Germany *E-mail: gesche.winkler@giroq.ulaval.ca ABSTRACT: The growth and reproduction of 2 co-occurring mysids (Neomysis integer Leach, 1814 and Praunus flexuosus F. Müller, 1776) were investigated against the background of their life cycle with individual-based experiments in the laboratory at 2 temperatures (10 and 15°C). The response of postmarsupial growth in relation to age in N. integer followed a sigmoid curve, based on an increase in both intermoult periods and growth factors. Maturity occurred after 15 to 16 moults and an age of 110 d at 10°C. At 15°C, the mean age was 45 d and mean length was 8 mm at maturity. Up to this stage they had moulted 9 to 10 times. In adults, growth rates decreased with increasing length. In post-larval and juvenile individuals of N. integer (3 to 7 mm), growth strongly depended on temperature as shown by high temperature coefficients (Q10 = 4.0 to 7.4). The impact of temperature, on the growth of P. flexuosus was markedly different, the intermoult periods decreased while the growth factors increased with increasing temperature. At 15°C they needed 3.5 mo to mature and averaged 16 to 18 mm. P. flexuosus needed more than twice as long as N. integer to reach maturity, long enough for 2 generations of N. integer. In addition, temperature coefficients were markedly lower in juvenile P. flexuosus (Q10 = 1.0 to 3.1) than in juvenile N. integer. The reproduction rate of N. integer was twice that of P. flexuosus. Incubation time for P. flexuosus was longer, fewer post-larval individuals emerged, and juveniles were 1 to 1.5 mm longer than juvenile N. integer. There were clear differences in the sequence of generations of N. integer and P. flexuosus, based on the development, time to maturity, number, and length of offspring. These interspecific differences in growth and reproduction enable a better insight into the life history strategies of N. integer and P. flexuosus and help to interpret the different distribution patterns, population structures, and the coexistence of these 2 species. KEY WORDS: Neomysis integer · Praunus flexuosus · Mysidacea · Growth · Life cycle Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 235. Online publication date: June 19, 2002 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2002 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 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| 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".