Pseudodiaptomus marinus Sato, 1913, a new invasive copepod in Lake Faro (Sicily): observations on the swimming behaviour and the sex-dependent responses to food

Sabia, Luciana; Uttieri, Marco; Schmitt, François G; Zagami, Giacomo; Zambianchi, Enrico; Souissi, Sami

doi:10.1186/s40555-014-0049-8

Cited by 27 publications

(17 citation statements)

References 53 publications

(73 reference statements)

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“…The presence of tropical and coastal demersal species, such as P. australiensis and P. arabicus (Walter, 1987;, in the inner coastal waters of Annaba Bay may be caused by discharge of ballast water from international shipping. This way of transport is a spreading factor of globally invading coastal copepods (Brylinski et al, 2012;De Olazabal & Tirelli, 2011;Rajakaruna et al, 2012;Sabia et al, 2014).…”

Section: The Copepod Communitymentioning

confidence: 99%

Net-zooplankton abundance and biomass from Annaba Bay (SW Mediterranean Sea) under estuarine influences

2016

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Zooplankton samples were collected in Annaba Bay (Algeria) from January 2009-March 2011 at three coastal sites differently affected by estuarine plumes and external currents. Aim of this survey was to analyze zooplankton composition, abundance and biomass and compare the results with previous studies to reveal possible populations and environmental changes. The mean zooplankton abundance varied between 1,200-6,000 ind. m-3 and biomass 6.70-25.70 mg DW m-3, according to the site. Copepods constituted the main fraction of zooplankton community, and Oithona similis and Paracalanus indicus successively dominated during autumn-winter and spring-summer. The dinoflagellate Noctiluca scintillans was one of the major zooplankton components, and developed high numbers during February-April, becoming common in neritic and coastal regions. The singularity of the zooplankton from Annaba Bay is the prevalence of P. indicus throughout the entire bay and the decrease in Acartia discaudata and A. clausi (with respect to previous years), possibly replaced by A. negligens. Additionally, Oithona nana abundance markedly decreased with the large development of O. similis. Annaba Bay also differs from other similar Mediterranean coastal areas by the large development of Centropages ponticus populations during the warm period. Among the identified copepod species, the alien species Pseudodiaptomus australiensis and P. arabicus are reported for the first time in the Mediterranean Sea. The occurrence of copepodid V stages of P. australiensis suggests that this species survives and reproduces in Annaba Bay, but so far without developing an abundant population.

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Section: The Copepod Communitymentioning

confidence: 99%

Net-zooplankton abundance and biomass from Annaba Bay (SW Mediterranean Sea) under estuarine influences

2016

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“…marinus copepods were well acclimated to the laboratory conditions during several generations ($2 years in the Marine Station of Wimereux, France) as previously described (Sabia et al, 2014). They were transferred from their initial culture medium (temperature 18°C and salinity 30 psu) to a new medium at 18°C and 15 psu for the moderate haline stress, 18°C and 0 psu for the severe haline stress, 4°C and 30 psu for the temperature stress, 4°C and 0 psu for the mixed stress.…”

Section: Copepods Preparation and Manipulationmentioning

confidence: 99%

“…They exhibit different types of swimming behaviors, with rapid movements of short duration (Michalec et al, 2012). P. marinus can reach 130 lm/s (Sabia et al, 2014), a velocity equaling 100 body lengths s À1 during escape responses. Since the viscosity and resistance of the water in relation to the animal size is very high, this speed had to be maintained by uninterrupted beating of its appendages.…”

Section: Introductionmentioning

confidence: 99%

Label-free microscopy and stress responses reveal the functional organization of Pseudodiaptomus marinus copepod myofibrils

Ibrahim

Hage

Souissi

et al. 2015

Journal of Structural Biology

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“…This copepod species originated from Asia and has invaded during the last decades several estuarine and coastal areas in the northern hemisphere [23]. More recently, this species was observed in the Mediterranean Sea as well as in the North Sea [24, 25]. This species has a potential for invading large coastal ecosystems at global scale [11].…”

Section: Introductionmentioning

confidence: 99%

Myofibril Changes in the Copepod Pseudodiaptomus marinus Exposed to Haline and Thermal Stresses

Ibrahim¹,

Souissi²,

Leray³

et al. 2016

PLoS ONE

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Copepods are small crustaceans capable to survive in various aquatic environments. Their responses to changes in different external factors such as salinity and temperature can be observed at different integration levels from copepod genes to copepod communities. Until now, no thorough observation of the temperature or salinity effect stresses on copepods has been done by optical microscopy. In this study, we used autofluorescence to visualize these effects on the morphology of the calanoid copepod Pseudodiaptomus marinus maintained during several generations in the laboratory at favorable and stable conditions of salinity (30 psu) and temperature (18°C). Four different stress experiments were conducted: at a sharp decrease in temperature (18 to 4°C), a moderate decrease in salinity (from 30 to 15 psu), a major decrease in salinity (from 30 to 0 psu), and finally a combined stress with a decrease in both temperature and salinity (from 18°C and 30 psu to 4°C and 0 psu). After these stresses, images acquired by confocal laser scanning microscopy (CLSM) revealed changes in copepod cuticle and muscle structure. Low salinity and/or temperature stresses affected both the detection of fluorescence emitted by muscle sarcomeres and the distance between them. In the remaining paper we will use the term sarcomeres to describe the elements located within sarcomeres and emitted autofluorescence signals. Quantitative study showed an increase in the average distance between two consecutive sarcomeres from 2.06 +/- 0.11 μm to 2.44 +/- 0.42 μm and 2.88 +/- 0.45μm after the exposure to major haline stress (18°C, 0 psu) and the combined stress (4°C, 0 psu), respectively. These stresses also caused cuticle cracks which often occurred at the same location, suggesting the cuticle as a sensitive area for osmoregulation. Our results suggest the use of cuticular and muscle autofluorescence as new biomarkers of stress detectable in formalin-preserved P. marinus individuals. Our label-free method can be easily applied to a large number of other copepod species or invertebrates with striated musculature.

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Pseudodiaptomus marinus Sato, 1913, a new invasive copepod in Lake Faro (Sicily): observations on the swimming behaviour and the sex-dependent responses to food

Cited by 27 publications

References 53 publications

Net-zooplankton abundance and biomass from Annaba Bay (SW Mediterranean Sea) under estuarine influences

Net-zooplankton abundance and biomass from Annaba Bay (SW Mediterranean Sea) under estuarine influences

Label-free microscopy and stress responses reveal the functional organization of Pseudodiaptomus marinus copepod myofibrils

Myofibril Changes in the Copepod Pseudodiaptomus marinus Exposed to Haline and Thermal Stresses

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