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Temperature-dependent egg production and egg hatching rates of small egg-carrying and broadcast-spawning copepods Oithona similis, Microsetella norvegica and Microcalanus pusillus
- Source :
- Journal of Plankton Research, Barth-Jensen, C, Koski, M, Varpe, Ø, Glad, P, Wangensteen, O S, Præbel, K & Svensen, C 2020, ' Temperature-dependent egg production and egg hatching rates of small egg-carrying and broadcast-spawning copepods Oithona similis, Microsetella norvegica and Microcalanus pusillus ', Journal of Plankton Research, vol. 42, no. 5, fbaa039, pp. 564-580 . https://doi.org/10.1093/plankt/fbaa039
- Publication Year :
- 2020
- Publisher :
- Oxford University Press, 2020.
-
Abstract
- Reproductive rates of copepods are temperature-dependent, but poorly known for small copepods at low temperatures, hindering the predictions of population dynamics and secondary production in high-latitude ecosystems. We investigated egg hatching rates, hatching success and egg production of the small copepods Oithona similis and Microsetella norvegica (sac spawners) and Microcalanus pusillus (broadcast spawner) between March and August. Incubations were performed at ecologically relevant temperatures between 1.3 and 13.2°C, and egg production rates were calculated. All egg hatching rates were positively correlated to temperature, although with large species-specific differences. At the lowest temperatures, M. pusillus eggs hatched within 4 days, whereas the eggs from sac spawners took 3–8 weeks to hatch. The egg hatching success was ≤25% for M. pusillus, >75% for O. similis and variable for M. norvegica. The maximum weight-specific egg production rate (μg C μg−1 C d−1) of M. pusillus was higher (0.22) than O. similis (0.12) and M. norvegica (0.06). M. norvegica reproduction peaked at 6–8°C, the prevailing in situ temperatures during its reproductive period. The difference in reproductive rates indicates species-specific thermal plasticity for the three copepods, which could have implications for present and future population dynamics of the species in arctic fjords.
- Subjects :
- VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497
Temperatures baixes (Investigació)
media_common.quotation_subject
Population
weight-specific egg production rate
Zoology
Fjord
low temperature
Aquatic Science
Biology
Dyreplankton / Zooplankton
Copepoda
Estacions de l'any
medicine
Low temperature
AcademicSubjects/SCI00970
Marin økologi / Marine ecology
education
Ecology, Evolution, Behavior and Systematics
VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920
hatching success
media_common
Weight-specific egg production rate
Oithona similis
geography
education.field_of_study
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920
geography.geographical_feature_category
Ecology
seasonality
Hatching
Female carbon content
female carbon content
Seasonality
Eggs production
medicine.disease
Low temperature research
Reproductive period
VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497
embryonic structures
Original Article
Seasons
Reproduction
Microcalanus
Hatching success
Producció d'ous
Copèpodes
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Journal of Plankton Research, Barth-Jensen, C, Koski, M, Varpe, Ø, Glad, P, Wangensteen, O S, Præbel, K & Svensen, C 2020, ' Temperature-dependent egg production and egg hatching rates of small egg-carrying and broadcast-spawning copepods Oithona similis, Microsetella norvegica and Microcalanus pusillus ', Journal of Plankton Research, vol. 42, no. 5, fbaa039, pp. 564-580 . https://doi.org/10.1093/plankt/fbaa039
- Accession number :
- edsair.doi.dedup.....a0cfec1e47bee947109c2f0e0be79900