Preliminary observations on the effect of light and temperature on the hatching success and rate of Lepidurus arcticus eggs. Issue 4 (4th July 2019)
- Record Type:
- Journal Article
- Title:
- Preliminary observations on the effect of light and temperature on the hatching success and rate of Lepidurus arcticus eggs. Issue 4 (4th July 2019)
- Main Title:
- Preliminary observations on the effect of light and temperature on the hatching success and rate of Lepidurus arcticus eggs
- Authors:
- Pasquali, Vittorio
Calizza, Edoardo
Setini, Andrea
Hazlerigg, David
Christoffersen, Kirsten Seestern - Abstract:
- Abstract : Dormancy, which arrests development, is a well-known survival strategy among animals living in the Arctic to overcome harsh periods. It is not clear if the dormant state in notostracans is controlled endogenously (diapause) or exogenously (quiescence). For Lepidurus arcticus, it is unknown how it responds to the photoperiod entrainment, if it has a biological clock and if it has a rhythmic expression of the clock genes. We studied the hatching success of resting eggs at four constant temperatures (5, 10, 15 and 25 °C) and under different illumination regimes [continuous light (LL) and continuous dark (DD)]. It was assumed that light and temperature are both important triggers, with temperature having the most pronounced effect. In our experiment, hatching occurred only at 5 and 10 °C, while we did not observe hatching at 15 and 25 °C. The highest percentage of eggs hatched was at 10 °C in LL (60%); the lowest was at 5 °C in DD (18%). The percentages hatched at 5 °C in LL (24%) and at 10 °C in DD (26%) were similar. Our results indicate that both temperature and light had a significant and interacting effect on hatching in L. arcticus, with temperature being the dominant factor controlling the process. This suggests that changes in temperature affecting the Arctic may significantly impact phenology of this key species in the region. Given that no hatching was observed at 15 °C or above, the persistence of this species may be at risk in areas were arctic lakes areAbstract : Dormancy, which arrests development, is a well-known survival strategy among animals living in the Arctic to overcome harsh periods. It is not clear if the dormant state in notostracans is controlled endogenously (diapause) or exogenously (quiescence). For Lepidurus arcticus, it is unknown how it responds to the photoperiod entrainment, if it has a biological clock and if it has a rhythmic expression of the clock genes. We studied the hatching success of resting eggs at four constant temperatures (5, 10, 15 and 25 °C) and under different illumination regimes [continuous light (LL) and continuous dark (DD)]. It was assumed that light and temperature are both important triggers, with temperature having the most pronounced effect. In our experiment, hatching occurred only at 5 and 10 °C, while we did not observe hatching at 15 and 25 °C. The highest percentage of eggs hatched was at 10 °C in LL (60%); the lowest was at 5 °C in DD (18%). The percentages hatched at 5 °C in LL (24%) and at 10 °C in DD (26%) were similar. Our results indicate that both temperature and light had a significant and interacting effect on hatching in L. arcticus, with temperature being the dominant factor controlling the process. This suggests that changes in temperature affecting the Arctic may significantly impact phenology of this key species in the region. Given that no hatching was observed at 15 °C or above, the persistence of this species may be at risk in areas were arctic lakes are expected to warm to such levels during the summer months. … (more)
- Is Part Of:
- Ethology, ecology & evolution. Volume 31:Issue 4(2019)
- Journal:
- Ethology, ecology & evolution
- Issue:
- Volume 31:Issue 4(2019)
- Issue Display:
- Volume 31, Issue 4 (2019)
- Year:
- 2019
- Volume:
- 31
- Issue:
- 4
- Issue Sort Value:
- 2019-0031-0004-0000
- Page Start:
- 348
- Page End:
- 357
- Publication Date:
- 2019-07-04
- Subjects:
- biological rhythms -- dormancy -- hatching -- Notostraca, Arctic
Animal behavior -- Periodicals
Animal ecology -- Periodicals
Behavior evolution -- Periodicals
Behavior, Animal -- Periodicals
Ecology -- Periodicals
Biological Evolution -- Periodicals
Écologie animale -- Périodiques
Évolution du comportement -- Périodiques
Éthologie -- Périodiques
Animal behavior
Animal ecology
Behavior evolution
Periodicals
Electronic journals
591.5 - Journal URLs:
- http://catalog.hathitrust.org/api/volumes/oclc/20334991.html ↗
http://www.tandfonline.com/toc/teee20/current ↗
http://www.unifi.it/unifi/dbag/eee/ ↗
http://www.tandfonline.com/ ↗ - DOI:
- 10.1080/03949370.2019.1609093 ↗
- Languages:
- English
- ISSNs:
- 0394-9370
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 11359.xml