Temperature effects on Calanus helgolandicus (Copepoda: Calanoida) development time and egg production

Bonnet, Delphine; Harris, Roger P.; Yebra, Lidia; Guilhaumon, François; Conway, D. V. P.; Hirst, Andrew G.

doi:10.1093/plankt/fbn099

Cited by 28 publications

(47 citation statements)

References 38 publications

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“…In the North Sea C. finmarchicus is more abundant than C. helgolandicus at temperatures below 11uC, while C. helgolandicus generally dominates at temperatures above 11uC (Bonnet et al 2005).…”

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confidence: 98%

“…Four Calanus species exist in the North Atlantic. Calanus glacialis and Calanus hyberboreus dominate in Arctic waters, while Calanus finmarchicus has its center in the North Atlantic and Calanus helgolandicus prevails farther south Bonnet et al 2005;Falk-Petersen et al 2009). Here we consider the latter two species, their responses in feeding and development time to changing temperature and food conditions, and how this may affect the competition between them.…”

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confidence: 99%

“…Observed decadal changes in the spatial distribution of C. finmarchicus between 1960 and 2005 in the North Sea suggest a decrease in the occurrence of the species at this southern edge of its distribution (Reygondeau and Beaugrand 2011). In a changing climate, such changes are assumed to be more prominent, and substantial efforts have been put into research on Calanus biogeography, biology, and ecology (Beaugrand et al 2003;Bonnet et al 2005; Jónasdó ttir and Koski 2011).…”

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confidence: 99%

“…Temperature is considered as a key factor for species development (Calbet et al 2001;Halsband-Lenk et al 2002, 2004 and C. finmarchicus and C. helgolandicus show a very distinct distribution in relation to temperature both horizontally and vertically (Bonnet et al 2005; Jó nasdó ttir and Koski 2011). In the North Sea C. finmarchicus is more abundant than C. helgolandicus at temperatures below 11uC, while C. helgolandicus generally dominates at temperatures above 11uC (Bonnet et al 2005).…”

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confidence: 99%

“…Moreover, for many of its predators the size of prey, i.e., Calanus, is important and it is therefore crucial to know at what time of the year Calanus reaches a suitable size as a prey item (Beaugrand et al 2003). Thorough experiments with both C. finmarchicus and C. helgolandicus have been carried out showing a general increase in development times with decreasing food concentration and temperature (Campbell et al 2001;Cook et al 2007;Bonnet et al 2009). However, due to the interaction between food and temperature on development (Cook et al 2007), these studies have not been able to point out a solid difference between the two species.…”

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confidence: 99%

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The effect of changes in temperature and food on the development of Calanus finmarchicus and Calanus helgolandicus populations

Møller

Maar

Jónasdóttir

et al. 2012

Limnology & Oceanography

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We studied the response in development times of Calanus finmarchicus and Calanus helgolandicus to changes in temperature and food conditions. Grazing experiments were performed at different temperatures for both species, and the results were implemented in a stage-resolved zooplankton population model that predicted development times from biomass increments controlled by ingestion and metabolic losses. Predictions were validated against development data from the literature, and show that C. finmarchicus develops faster than C. helgolandicus below 11uC and slower above. The different relative development rates of the species are related to different temperature responses in ingestion rates. A temperature increase of 1uC to 2uC may have consequences for the relative contribution of C. helgolandicus and C. finmarchicus to the copepod community, and both seasonal and spatial displacements of the Calanus populations can be expected under climate change.

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confidence: 98%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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The effect of changes in temperature and food on the development of Calanus finmarchicus and Calanus helgolandicus populations

Møller

Maar

Jónasdóttir

et al. 2012

Limnology & Oceanography

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Mortality of Calanus helgolandicus: Sources, differences between the sexes and consumptive and nonconsumptive processes

Maud

Hirst

Atkinson

et al. 2018

Limnology & Oceanography

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While losses from mortality are as important as gains from reproduction in zooplankton population dynamics, the former are more challenging to quantify. We used two approaches to provide complementary insights into the mortality of a biomass-dominant copepod, Calanus helgolandicus, at Station L4 in the English Channel. Using a neutral-red staining method, we found that dead carcasses represented a mean of 9% of the C. helgolandicus copepodites sampled. The resulting nonconsumptive mortality rates are the first that have been derived for C. helgolandicus; and estimates suggest a contribution of 0-54% (median of 4.4%) to the total mortality rate. Consumptive mortality (i.e., that due to removal by predation), dominated for most of the year and contributed a mean of 89% to total mortality. Nonconsumptive mortality increased during summer and winter, and was positively related to maximum wind speed during the preceding 72 h, indicating that extreme weather events may lead to increased mortality. Using the Vertical Life Table approach, mortality rates across the CV-adult male stage pair were on average 2.5 times greater than those of CV-adult females. Adult male consumptive mortality rates were 6 times greater than those for females; adult male nonconsumptive rates were twice those of females, suggesting that predation is of greater significance to male loss rates. Summer CV-adult mortality rates were positively correlated to temperature, and to the abundance of predatory chaetognaths and siphonophores, suggesting that the gelatinous predator assemblage is the dominant agent for population control of late stage copepodites of C. helgolandicus at L4.

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Optimisation of the Culture Conditions of Nannocalanus minor (Copepoda: Calanoida)

Jothiraj

Santhanam

2018

Basic and Applied Zooplankton Biology

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Temperature effects on Calanus helgolandicus (Copepoda: Calanoida) development time and egg production

Cited by 28 publications

References 38 publications

The effect of changes in temperature and food on the development of Calanus finmarchicus and Calanus helgolandicus populations

The effect of changes in temperature and food on the development of Calanus finmarchicus and Calanus helgolandicus populations

Mortality of Calanus helgolandicus: Sources, differences between the sexes and consumptive and nonconsumptive processes

Optimisation of the Culture Conditions of Nannocalanus minor (Copepoda: Calanoida)

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