Mesoscale distribution and advection of overwintering Calanus finmarchicus off the shelf of northern Norway

Gaardsted, Frank; Zhou, Meng; Pavlov, Vladimir; Morozov, A. N.; Tande, Kurt S.

doi:10.1016/j.dsr.2010.07.003

Cited by 12 publications

(13 citation statements)

References 29 publications

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“…Baumgartner, 2003;Baumgartner et al, 2003) and acoustic (e.g. Gaardsted et al, 2010) methods may provide the enhanced resolution needed to estimate the timing and depth of dormancy more accurately. When paired with moored or autonomous underwater vehicle data, more rigorous testing of the hypotheses proposed here would be possible.…”

Section: Discussionmentioning

confidence: 99%

The impact of increasing temperatures on dormancy duration in Calanus finmarchicus

Pierson

Batchelder

Saumweber

et al. 2013

Journal of Plankton Research

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Dormancy is a key life history trait of planktonic calanoid copepods in the genus Calanus. Empirical evidence suggests that duration of dormancy is controlled by ambient temperature driving lipid metabolism in individuals. Here, we use the temperature-dependent metabolic rates of overwintering individuals to show that increasing temperatures, associated with global climate change over the next several decades, may reduce dormancy duration for the north Atlantic species C. finmarchicus by up to 40 days. Our calculations are based on comparing predicted dormancy duration for individuals of a given size at specific temperatures to dormancy duration at warmer temperatures and smaller size. We also provide corrections to the relationship of dormancy duration described by Saumweber and Durbin [Estimating potential diapause duration in Calanus finmarchicus. Deep Sea Res. Pt. II., 53, 2597-2617.]. Our calculations indicate that changing temperatures in the sea may lead to phenological shifts in life histories of C. finmarchicus and congeners, which may have implications for planktonic food web and trophic dynamics.

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Section: Discussionmentioning

confidence: 99%

The impact of increasing temperatures on dormancy duration in Calanus finmarchicus

Pierson

Batchelder

Saumweber

et al. 2013

Journal of Plankton Research

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“…In January, C. finmarchicus overwinters below the AW in the North Atlantic and Greenland Sea, and thus out of range for pelagic fish and zooplankton (Hirche, 1991;Gaardsted et al, 2010). However, in the waters north and west of Svalbard C. finmarchicus has recently been observed to concentrate in the upper 50 m in January (Daase et al, 2014;Berge et al, 2015;Basedow et al, 2018), an observation that has a great impact on estimates of the amount of C. finmarchicus advected in the Arctic with AW (Basedow et al, 2018).…”

Section: Seasonal Changes In Trophic Relationshipsmentioning

confidence: 99%

Mesopelagic Sound Scattering Layers of the High Arctic: Seasonal Variations in Biomass, Species Assemblage, and Trophic Relationships

et al. 2019

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“…The spring distribution of C. finmarchicus nauplii reflects spawning events occurring immediately after the seasonal ascent migration from the deep hibernation habitats, where the copepodite stage V (CV) dwells for overwintering ( Broms et al ., 2009 ; Bagøien et al ., 2012 ; Head et al ., 2013 ). The deep water hibernation strategy reduces loss rates due to predation and advective dispersal during winter, but when the population ascends into surface waters and copepodites molt to the sexually mature adult stages in late winter or spring ( Melle et al ., 2014 ), they are subject to high predation risk and surface circulation that may disperse its members over large distances ( Halvorsen et al ., 2003 ; Gaardsted et al ., 2010 ). Thus, the early spring shelf population of C. finmarchicus nauplii is assumed to be advected in from oceanic populations, where highest abundances have been recorded ( Slagstad and Tande, 1996 ; Halvorsen et al ., 2003 ).…”

Section: Introductionmentioning

confidence: 99%

A majorCalanus finmarchicusoverwintering population inside a deep fjord in northern Norway: implications for cod larvae recruitment success

et al. 2016

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High Calanus finmarchicus abundances were recorded in wintertime in Vestfjorden, close to the main cod breeding grounds off Lofoten and Vesterålen, northern Norway. The mean abundance for locations with water depth >500 m was ∼37000 ind. m−2 (range: 26700–49000 ind. m−2). To our knowledge, this is the first report of massive overwintering of C. finmarchicus on the Norwegian shelf. Because of the observed size and location of this population, we argue that local overwintering on the northern Norwegian shelf can contribute significantly to sustain a C. finmarchicus population on the shelf during the period of first feeding for cod larvae. This is supported by a particle tracking model.

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Mesoscale distribution and advection of overwintering Calanus finmarchicus off the shelf of northern Norway

Cited by 12 publications

References 29 publications

The impact of increasing temperatures on dormancy duration in Calanus finmarchicus

The impact of increasing temperatures on dormancy duration in Calanus finmarchicus

Mesopelagic Sound Scattering Layers of the High Arctic: Seasonal Variations in Biomass, Species Assemblage, and Trophic Relationships

A majorCalanus finmarchicusoverwintering population inside a deep fjord in northern Norway: implications for cod larvae recruitment success

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