An overview of Calanus helgolandicus ecology in European waters

Bonnet, Delphine; Richardson, Anthony J.; Harris, Roger P.; Hirst, Andrew G.; Beaugrand, Grégory; Edwards, Martin; Ceballos, Sara; Diekman, Rabea; López‐Urrutia, Ángel; Valdés, Luis; Carlotti, François; Molinero, Juan Carlos; Weikert, Horst; Greve, Wulf; Lučić, Davor; Albaina, Aitor; Yahia, Nejib Daly; Umani, Serena Fonda; Miranda, A.; Santos, Antonina Dos; Cook, Kathryn; Robinson, Susan; Puelles, María Luz Fernández de

doi:10.1016/j.pocean.2005.02.002

Cited by 135 publications

(149 citation statements)

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“…During the daytime, the migrating part of the population ascends to depths close to the layers where diapausing Calanus live, probably mixing with them. Prosome length of females from the Black Sea population is similar to (or may even exceed) the maximum prosome length of C. helgolandicus (2.6 mm) in the North Sea (Bonnet et al 2005).During summer and autumn, temperature stratification and low phytoplankton concentration in the water column cause late development stages of C. euxinus to reduce energy expenditure 7.2-fold through diel vertical migration from warm upper layers to the cold OMZ, thus using the energy of food consumed at night near the surface more efficiently , Yuneva et al 1999. Under hypoxic conditions during the daytime the catabolism of lipids is depressed whilst the synthesis of fatty alcohols from non-lipid components in the oil sac may be facilitated (Sargent & McIntosh 1974).…”

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confidence: 65%

“…This wide range is mainly due to seasonal variation; the temperature does not range widely between populations. Seasonal changes in abundance of C. helgolandicus are positively correlated with temperature (Bonnet et al 2005) and food availability (Rey-Rassat et al 2004). Overwintering C. helgolandicus descend to deep water and are separated spatially from the part of the population that develops in surface layers.…”

Section: Abstract: Calanus Euxinus · Lipid Storage · Respiration · Gmentioning

confidence: 99%

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Development of Calanus euxinus during spring cold homothermy in the Black Sea

Svetlichny¹,

Yuneva²,

Hubareva³

et al. 2009

Mar. Ecol. Prog. Ser.

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In copepodites and adults of Calanus euxinus abundance, body length and weight, chemical composition and respiration rate in relation to age were studied during the cruise of R/V 'Knorr' in April 2003 in the southwestern Black Sea and in laboratory experiments. Data on morphology and physiology of C. euxinus collected during other seasons were also used in comparative analyses. At high concentrations of the diatom Proboscia alata during spring homothermy (6.8 to 8.5°C) C. euxinus did not undertake diel vertical migrations to the oxygen minimum zone (OMZ). The majority of the population was located above the OMZ, feeding on phytoplankton during nighttime and daytime whilst nearly 10% of copepodite stages IV and V (CIV and CV) and adults remained constantly in the OMZ. Although a diapausing stock of the population began to form in the OMZ, the majority of CV developed without diapause. The development times of copepodite stages at 8°C were determined on the basis of field observations of ontogenetic changes in carbon content and calculated absolute growth rates. Development time from CI to CV amounted to 22 d. In CV the time for lipid deposition from 0.008 ± 0.007 mm 3 in postmolts up to a maximum volume of 0.165 ± 0.054 mm 3 in intermolts constituted 26 d. The total generation time from eggs to adults is not less than about 66 d. KEY WORDS: Calanus euxinus · Lipid storage · Respiration · Growth · Black Sea · Spring cold · HomothermyResale or republication not permitted without written consent of the publisher Mar Ecol Prog Ser 374: 199-213, 2009 other hypothesis, Calanus, like other 'boreal relicts', entered the Black Sea when it was connected with the North Sea across Europe during the period of retreating glaciers (Zaitsev 2006). This is in agreement with the results of Papadopoulos et al. (2005) suggesting that the divergences between the northeastern Atlantic, Mediterranean and Black Sea C. helgolandicus populations are much older than the estimated dates of colonization of the Mediterranean and Black Seas. However, according to Polischuk (1984) the last connection between the North and Black Seas could have been in the Late Holocene (2800 to 2700 BP).Calanus euxinus is a dominant component of the zooplankton biomass in the Rim Current system of the Black Sea. The ecology of this species differs significantly from that of C. helgolandicus in other European seas due to the characteristics of the basin.Calanus helgolandicus typically inhabits saline waters (32 to 39 ‰) with temperatures of 9 to 20°C. This wide range is mainly due to seasonal variation; the temperature does not range widely between populations. Seasonal changes in abundance of C. helgolandicus are positively correlated with temperature (Bonnet et al. 2005) and food availability (Rey-Rassat et al. 2004). Overwintering C. helgolandicus descend to deep water and are separated spatially from the part of the population that develops in surface layers.In contrast, Calanus euxinus has adapted to the low salinity of the Black Sea waters (18...

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confidence: 65%

Section: Abstract: Calanus Euxinus · Lipid Storage · Respiration · Gmentioning

confidence: 99%

Development of Calanus euxinus during spring cold homothermy in the Black Sea

Svetlichny¹,

Yuneva²,

Hubareva³

et al. 2009

Mar. Ecol. Prog. Ser.

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“…Although these three taxa were found during DYNAPROC 2, their abundance was very low (0.25% C. helgolandicus, 0.20% C. typicus and 0.03% M. typica). C. helgolandicus overwinters at 400-800 m depth at the period of the year studied (Bonnet et al, 2005) and M. typica is a deep-living species (Andersen et al, 2001a), which could explain their low abundance in the 0-250 m layer. C. typicus is a spring species whose abundance decreases during summer (Mazzocchi et al, 2007), and it becomes rare in autumn.…”

Section: Comparison With Previous Studiesmentioning

confidence: 93%

Short term changes in zooplankton community during the summer-autumn transition in the open NW Mediterranean Sea: species composition, abundance and diversity

et al. 2008

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Abstract. Short term changes in zooplankton community were investigated at a fixed station in offshore waters of the Ligurian Sea (DYNAPROC 2 cruise, September-October 2004). Mesozooplankton were sampled with vertical WP-II hauls (200 µm mesh-size) and large mesozooplankton, macrozooplankton and micronekton with a BIONESS multinet sampler (500 µm mesh-size). Temporal variations of total biomass, species composition and abundance of major taxa were studied. Intrusions of low salinity water masses were observed two times during the cruise. The first one, which was the most intense, was associated with changes in zooplankton community composition. Among copepods, the abundance of Calocalanus, Euchaeta, Heterorhabdus, Mesocalanus, Nannocalanus, Neocalanus, Pleuromamma and also calanoid copepodites increased markedly. Among noncopepod taxa, only small ostracods abundance increased. After this low salinity event, abundance of all taxa nearly returned to their initial values. The influence of salinity on each zooplankton taxon was confirmed by a statistical analysis (Perry's method). The Shannon diversity index, Pielou evenness and species richness were used to describe temporal variations of large copepod (>500 µm) diversity. The Shannon index and Pielou evenness decreased at the beginning of the low salinity water intrusions, but not species richness. We suggest that low salinity water masses contained its own zooplankton community and passed through the sampling area, thus causing a replacement of the zooplankton population.

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“…Since the 1960s a consistent northward shift of C. finmarchicus distribution has been detected (Beaugrand et al, 2002;Chust et al, 2014). In the North Sea this decrease in the abundance of C. finmarchicus has been associated with an increase of the more southern species C. helgolandicus, which has a lower lipid content and different phenology than C. finmarchicus Bonnet et al, 2005). Such replacement has had negative consequences for the recruitment of commercially important fish stocks such as cod, Gadus morhua and salmon, Salmo salar Olsen et al, 2011), as well as for the biological carbon pump (Beaugrand et al, 2010).…”

Section: Introductionmentioning

confidence: 90%