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-Field instantaneous measurements of physicochemical water parameters of ecological interest for Craspedacusta sowerbii in the study area, through a standard year. Tabla 2.-Mediciones instantáneas de parámetros fisicoquímicos de interés ecológico para Craspedacusta sowerbii en el área de estudio, a lo largo de un año típico.
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Alien invasive species are one of the major threats to biodiversity. Particularly, cnidarian species are frequently spread far from their native areas, through human activities. Indeed, many hydroids have been successfully trans- ported as fouling on ship hulls, in ballast waters and as fauna associated with the commercial traffic of other aquatic...
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Context 1
... zone is located at alti- tude of 33 m above sea level, separated 8.6 km from the confluence with the Guadalquivir River and freely exposed to direct sunlight throughout the day. Its main physicochemical water parameters associated with the occurrence of C. sowerbii are listed in the Table 2. Water temperature is a key factor in jellyfish blooms ( Purcell, 2005;Prieto et al., 2010). ...Context 2
... main physicochemical water parameters associated with the occurrence of C. sowerbii are listed in the Table 2. Water temperature is a key factor in jellyfish blooms ( Purcell, 2005;Prieto et al., 2010). In particular, the polyps of C. sowerbii release medusae at a threshold of 21°C ( Folino-Rorem et al., 2016), which is consistent with summer temperature in the study area (Table 2). Alkaline levels of pH recorded in Sietearroyos were similar to others reported for the Iberian Peninsula (Ruiz et al., 1992;Ferreira, 1985;Pérez-Bote et al., 2006) or zones with comparable latitude in Europe ( Karaouzas et al., 2015). ...Similar publications
An account is given of hydroids collected in 2015 and 2016 from port and harbor fouling communities in the Galápagos Islands. Also included is the hydroid of Ectopleura media, discovered on the wreck of the tanker Jessica near Isla San Cristóbal in 2001. Among 20 species reported herein were six anthoathecates and 14 leptothecates. Most common in t...
Although Porpita porpita is native to tropical and sub-tropical waters and widely occurred in the Atlantic and Indo-Pacific oceans and Mediterranean Sea, its occurrence has not been reported from Red Sea. Three specimens of P. porpita were collected in the middle littoral zone of the Egyptian Red Sea coast off Hurghada in December 2014. Specimens w...
This study describes and illustrates four new species Laticanna nanhaiensis Xu, Huang and Wang, gen. nov. and sp. nov., Protiaropsis gemmifera Xu, Huang and Du, sp. nov., Merga nanhaiensis Xu, Huang and Guo, sp. nov. and Rhabdoon apiciloculus Xu, Huang and Du, sp. nov. based on specimens from the south-central South China Sea. Additionally, keys to...
Citations
... It is a cosmopolitan invasive taxon, occuring in all continents except Antarctica (Dumont, 1994;Jankowski, 2001;Jankowski et al., 2008). After its discovery in England, the taxon was recorded in numerous other European countries (Arbačiauskas and Lesutienė, 2005;Lundberg et al., 2005;Fritz et al., 2007;Karaouzas et al., 2015;Minchin et al., 2016;Ciutti et al., 2017;Medina-Gavilán and González-Duarte, 2018), in North America (Acker and Muscat, 1976;DeVries, 1992), in Central America (Moreno-Leon and Ortega-Rubio, 2009), in South America (Failla Siquier et al., 2017;Caputo et al., 2018), in Asia (Bekleyen et al., 2011;Gasith et al., 2011;Lewis et al., 2012); in Africa (Rayner, 1988;Oualid et al., 2019), in Australia (Thomas, 1950) and in New Zealand (Boothroyd et al., 2002). ...
The freshwater jellyfish Craspedacusta sowerbii Lankester 1880 is a cryptic cosmopolitan invasive species, which occurs in all continents except Antarctica. Recent molecular studies suggest the existence of at least three very different genetic lineages of Craspedacusta: the “sowerbii”, the “kiatingi”, and the “sinensis” lineages. We report the presence of both medusae and polyps of this alien taxon in the Large Lake of Monticolo / Montiggl, a meso-eutrophic natural lake in the Province of Bolzano / Bozen in Northern Italy. Molecular analyses of mitochondrial 16S sequences showed that this population belongs to a different lineage than that recently described for Sicily (Southern Italy). Therefore, there are two different genetic lineages of C. sowerbii in Italy. In the Large Lake of Monticolo / Montiggl medusae were observed in 6 consecutive summers (2015–2020), from July to September. All the examined medusae were males. The stomach content analyses showed that zooplanktonic copepods and cladocerans with size range between 0.3 and 0.8 mm were the preferred prey of medusae. Polyps of C. sowerbii were recorded in the lake on the zebra mussel Dreissena polymorpha in shallow water and on the underside of artificial substrates. The analyses of zebra mussels would therefore be a simple method to check for the presence of the polyp stage of C. sowerbii in various aquatic environments.
... C. sowerbii was first described from specimens found in a water-lily tank in Regent's Park, London, England in 1880 (Lankester, 1880a). Later, the species was reported from many different localities: United States (Garman, 1916), Hawaii, South Australia (Thomas, 1950), New Zealand, the Philippines, China, Japan (Acker, 1976), France, Sweden, Portugal (Ferreira, 1985), Canada (McAlpine et al., 2002), Spain (Pérez-Bote et al., 2006;Medina-Gavilán and González-Duarte, 2018), Mexico (Moreno-Leon and Ortega-Rubio, 2009), Brazil (Silva and Roche, 2007), Uruguay (Mañé-Garzón and Carbonell, 1971), India (Riyas and Kumar, 2017), Italy (Schifani et al., 2018), Chile (Fraire-Pacheco et al., 2017;Fuentes et al., 2019), Turkey (Balik et al., 2001;Bekleyen et al., 2011), Israel (Gasith et al., 2011) and Greece (Karaouzas et al., 2015). From the African continent, it has been recorded with certainty only from South Africa (Rayner, 1988;Rayner andAppleton, 1989, 1992). ...
Hidden diversity under morphology–based identifications of widespread invasive species: the case of the 'well– known' hydromedusa Craspedacusta sowerbii Lankester 1880. A relatively scarce number of morphological features available for delimiting closely related species and an increasingly worrisome scenario on Global Climate Change causing the rapid dispersion of invasive alien species can lead to the rapid spread of reports of a given species around the world. Craspedacusta sowerbii Lankester, 1880 is considered the most widespread freshwater jellyfish species and has been reported in numerous locations on all continents except Antarctica. Recently, a few medusae attributed to C. sowerbii were collected from a water reservoir (Bin El Ouidan) in Morocco, this being the first confirmed record of the species from North Africa. The morphology of these newly collected specimens agrees well with previous descriptions, but mitochondrial (Cox1 and 16S) and nuclear ITS (ITS1–5,8S–ITS2) molecular data lead to a discussion of a more complex general view concerning the number of species, synonyms and nomenclatural problems hidden behind the reports of Craspedacusta sowerbii.
