Diel Vertical Migration Behaviour of the Northern Krill (Meganyctiphanes norvegica Sars)

The prototype of Meganyctiphanes norvegica diel vertical migration (DVM) behaviour comprises ascent around dusk, feeding near the surface at night, and descent at dawn, explained as a trade-off between feeding and predator avoidance in an environment where both food and risk of predation is highest...

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Main Author: Kaartvedt, Stein
Other Authors: Biological and Environmental Sciences and Engineering (BESE) Division, Marine Science Program, Marine Science and Engineering
Format: Book
Language:unknown
Published: Elsevier BV 2010
Subjects:
Meganyctiphanes norvegica
Northern krill
Online Access:http://hdl.handle.net/10754/656278
https://doi.org/10.1016/B978-0-12-381308-4.00009-1
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spelling ftkingabdullahun:oai:repository.kaust.edu.sa:10754/656278 2023-06-18T03:41:41+02:00 Diel Vertical Migration Behaviour of the Northern Krill (Meganyctiphanes norvegica Sars) Kaartvedt, Stein Biological and Environmental Sciences and Engineering (BESE) Division Marine Science Program Marine Science and Engineering 2010-10-17 http://hdl.handle.net/10754/656278 https://doi.org/10.1016/B978-0-12-381308-4.00009-1 unknown Elsevier BV DOI:10.1016/b978-0-12-381308-4.00001-7 DOI:10.1016/b978-0-12-381308-4.00002-9 DOI:10.1016/b978-0-12-381308-4.00003-0 DOI:10.1016/b978-0-12-381308-4.00004-2 DOI:10.1016/b978-0-12-381308-4.00005-4 DOI:10.1016/b978-0-12-381308-4.00006-6 DOI:10.1016/b978-0-12-381308-4.00007-8 DOI:10.1016/b978-0-12-381308-4.00008-x DOI:10.1016/b978-0-12-381308-4.00009-1 DOI:10.1016/b978-0-12-381308-4.00010-8 DOI:10.1016/b978-0-12-381308-4.00011-x DOI:10.1016/b978-0-12-381308-4.00012-1 DOI:10.1016/b978-0-12-381308-4.00013-3 DOI:10.1016/b978-0-12-381308-4.00014-5 DOI:10.1016/b978-0-12-381308-4.00015-7 DOI:10.1016/b978-0-12-381308-4.00016-9 DOI:10.1016/b978-0-12-381308-4.00018-2 https://linkinghub.elsevier.com/retrieve/pii/B9780123813084000091 Kaartvedt, S. (2010). Diel Vertical Migration Behaviour of the Northern Krill (Meganyctiphanes norvegica Sars). Advances in Marine Biology, 255–275. doi:10.1016/b978-0-12-381308-4.00009-1 9780123813084 http://hdl.handle.net/10754/656278 Book 2010 ftkingabdullahun https://doi.org/10.1016/B978-0-12-381308-4.00009-110.1016/b978-0-12-381308-4.00001-710.1016/b978-0-12-381308-4.00002-910.1016/b978-0-12-381308-4.00003-010.1016/b978-0-12-381308-4.00004-210.1016/b978-0-12-381308-4.00005-410.1016/b978-0-12-381308-4.00006-61 2023-06-03T18:57:34Z The prototype of Meganyctiphanes norvegica diel vertical migration (DVM) behaviour comprises ascent around dusk, feeding near the surface at night, and descent at dawn, explained as a trade-off between feeding and predator avoidance in an environment where both food and risk of predation is highest near surface. Light is the proximate cue, and daytime distribution is deeper in clear waters and sunny weather and nocturnal distributions deeper in moonlight. However, both internal state and external factors further affect and modify the diel migration pattern. While Meganyctiphanes migrates in synchrony to the surface at sunset, part of the population may descend soon after the ascent with individuals re-entering upper layers throughout the night. This has been explained with hungry individuals being prone to take larger risks and hence stay shallower, while satiated individuals seek shelter at depth. Females migrate closer to the surface than males of equivalent size, possibly due to their greater demand for energy to fuel egg production. Freshly moulted M. norvegica remain at depth throughout the diel cycle. This has been related to the fact that that krill do not feed during moulting, to reduced swimming capacity, and as a mechanism to avoid cannibalism whilst in a vulnerable condition. In some locations large parts of the population remain at depth at night. Such behaviour may incur access to demersal food sources, provide avoidance of predators, or can be a means to avoid horizontal transport to adjacent, unfavourable areas. Environmental gradients can arrest migrations of M. norvegica, yet the effect of physics is not always distinguished from associated biological properties, like subsurface maxima of phytoplankton located at pycnocline boundaries. Deeper nocturnal distribution when predators were abundant has been reported, and krill may adjust their distribution upwards when exposed to deep-living predators. Instantaneous escape to approaching predators is a common component of the anti-predator repertoire ... Book Meganyctiphanes norvegica Northern krill King Abdullah University of Science and Technology: KAUST Repository
institution Open Polar
collection King Abdullah University of Science and Technology: KAUST Repository
op_collection_id ftkingabdullahun
language unknown
description The prototype of Meganyctiphanes norvegica diel vertical migration (DVM) behaviour comprises ascent around dusk, feeding near the surface at night, and descent at dawn, explained as a trade-off between feeding and predator avoidance in an environment where both food and risk of predation is highest near surface. Light is the proximate cue, and daytime distribution is deeper in clear waters and sunny weather and nocturnal distributions deeper in moonlight. However, both internal state and external factors further affect and modify the diel migration pattern. While Meganyctiphanes migrates in synchrony to the surface at sunset, part of the population may descend soon after the ascent with individuals re-entering upper layers throughout the night. This has been explained with hungry individuals being prone to take larger risks and hence stay shallower, while satiated individuals seek shelter at depth. Females migrate closer to the surface than males of equivalent size, possibly due to their greater demand for energy to fuel egg production. Freshly moulted M. norvegica remain at depth throughout the diel cycle. This has been related to the fact that that krill do not feed during moulting, to reduced swimming capacity, and as a mechanism to avoid cannibalism whilst in a vulnerable condition. In some locations large parts of the population remain at depth at night. Such behaviour may incur access to demersal food sources, provide avoidance of predators, or can be a means to avoid horizontal transport to adjacent, unfavourable areas. Environmental gradients can arrest migrations of M. norvegica, yet the effect of physics is not always distinguished from associated biological properties, like subsurface maxima of phytoplankton located at pycnocline boundaries. Deeper nocturnal distribution when predators were abundant has been reported, and krill may adjust their distribution upwards when exposed to deep-living predators. Instantaneous escape to approaching predators is a common component of the anti-predator repertoire ...
author2 Biological and Environmental Sciences and Engineering (BESE) Division
Marine Science Program
Marine Science and Engineering
format Book
author Kaartvedt, Stein
spellingShingle Kaartvedt, Stein
Diel Vertical Migration Behaviour of the Northern Krill (Meganyctiphanes norvegica Sars)
author_facet Kaartvedt, Stein
author_sort Kaartvedt, Stein
title Diel Vertical Migration Behaviour of the Northern Krill (Meganyctiphanes norvegica Sars)
title_short Diel Vertical Migration Behaviour of the Northern Krill (Meganyctiphanes norvegica Sars)
title_full Diel Vertical Migration Behaviour of the Northern Krill (Meganyctiphanes norvegica Sars)
title_fullStr Diel Vertical Migration Behaviour of the Northern Krill (Meganyctiphanes norvegica Sars)
title_full_unstemmed Diel Vertical Migration Behaviour of the Northern Krill (Meganyctiphanes norvegica Sars)
title_sort diel vertical migration behaviour of the northern krill (meganyctiphanes norvegica sars)
publisher Elsevier BV
publishDate 2010
url http://hdl.handle.net/10754/656278
https://doi.org/10.1016/B978-0-12-381308-4.00009-1
genre Meganyctiphanes norvegica
Northern krill
genre_facet Meganyctiphanes norvegica
Northern krill
op_relation DOI:10.1016/b978-0-12-381308-4.00001-7
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DOI:10.1016/b978-0-12-381308-4.00010-8
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DOI:10.1016/b978-0-12-381308-4.00013-3
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DOI:10.1016/b978-0-12-381308-4.00016-9
DOI:10.1016/b978-0-12-381308-4.00018-2
https://linkinghub.elsevier.com/retrieve/pii/B9780123813084000091
Kaartvedt, S. (2010). Diel Vertical Migration Behaviour of the Northern Krill (Meganyctiphanes norvegica Sars). Advances in Marine Biology, 255–275. doi:10.1016/b978-0-12-381308-4.00009-1
9780123813084
http://hdl.handle.net/10754/656278
op_doi https://doi.org/10.1016/B978-0-12-381308-4.00009-110.1016/b978-0-12-381308-4.00001-710.1016/b978-0-12-381308-4.00002-910.1016/b978-0-12-381308-4.00003-010.1016/b978-0-12-381308-4.00004-210.1016/b978-0-12-381308-4.00005-410.1016/b978-0-12-381308-4.00006-61
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