Mnemiopsis leidyi in the Baltic Sea – distribution and overwintering between autumn 2006 and spring 2007

Kube, Sandra; Postel, L.; Honnef, Christopher G.; Augustin, Christina B.

doi:10.3391/ai.2007.2.2.9

Cited by 50 publications

(33 citation statements)

References 26 publications

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“…Although Mnemiopsis occurrence reported from the North Sea, Kattegat, and Belt Sea and Bornholm areas is well supported by observations of lobate forms (Faasse and Bayha 2006;Javidpour et al 2006;Haslob et al 2007), to the best of our knowledge, they have never been collected north of Gotland. Similar to our observations in the northern Baltic Sea, most of the Mnemiopsis populations in the southwestern part of the sea consist of individuals ,1 mm (Kube et al 2007), for which taxonomic identification is far from reliable (Mayer 1912). Because Mertensia abundance correlates positively with salinity, it is likely to be present also in the southern parts of the Baltic.…”

Section: Discussionsupporting

confidence: 79%

Molecular evidence for the occurrence of ctenophore Mertensia ovum in the northern Baltic Sea and implications for the status of the Mnemiopsis leidyi invasion

Gorokhova

Lehtiniemi²,

Viitasalo-Frösen³

et al. 2009

Limnology & Oceanography

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Nucleotide sequence analysis of 18S ribosomal RNA gene (rRNA), internal transcribed spacer, and 5.8S rRNA was used for taxonomic identification of ctenophores collected in the northern Baltic Sea, where invasive Mnemiopsis leidyi and native Pleurobrachia pileus have been reported to occur. Contrary to previous reports, sequence analysis of 53 randomly selected specimens from seven stations revealed that none of them were M. leidyi or P. pileus. The 18S rRNA and 5.8S rRNA sequences were 100% identical to those of Mertensia ovum, a ctenophore with a broad Arctic and circumboreal distribution, which has never been reported to occur in the Baltic Sea. Polymerase chain reaction screening with primers designed to amplify all three species, and using ctenophores collected by vertically stratified sampling, confirmed that all ctenophores collected in this survey were M. ovum. The ctenophore abundance was high, up to 4500 individuals m 22 , positively correlating with salinity. Our findings emphasize the utility of applying molecular tools to biological surveys and the importance of rigorous species identification. They also indicate that M. leidyi, which is a threat to the southern Baltic ecosystem, does not occur in the northern part of the sea, and call for a pan-Baltic survey to establish current distributions of ctenophores, both native and invasive.

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Section: Discussionsupporting

confidence: 79%

Molecular evidence for the occurrence of ctenophore Mertensia ovum in the northern Baltic Sea and implications for the status of the Mnemiopsis leidyi invasion

Gorokhova

Lehtiniemi²,

Viitasalo-Frösen³

et al. 2009

Limnology & Oceanography

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“…Mnemiopsis leidyi may generate other environmental and economic damages in addition to the negative effects reported by the fishermen in the S'Ena Arrubia Lagoon. In fact, the predatory activity of M. leidyi on zooplankton may result in the reduction of veliger larvae of bivalves (see Purcell et al, 1991) and of juvenile fish, as observed during invasions in the Black, Caspian and Baltic seas (Ivanov et al, 2000;GESAMP, 2007;Kube et al, 2008).…”

Section: Impact On Fishery and Management And Mitigation Proposalsmentioning

confidence: 99%

First detection of Mnemiopsis leidyi (Ctenophora, Bolinopsidae) in Sardinia (S’Ena Arrubia Lagoon, Western Mediterranean): a threat for local fishery and species recruitment

et al. 2016

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The invasive comb jelly Mnemiopsis leidyi is a lobate ctenophore native of coastal and estuarine waters of the temperate western Atlantic Ocean. In the last decades this species has expanded its range of distribution, colonizing marine and transitional environments in Europe. In October 2015, during a survey fishing the European eel Anguilla anguilla in Sardinia (western Mediterranean), a massive bloom of this specie was observed in the eutrophic S’Ena Arrubia Lagoon for the first time. In November 2015, sampling was conducted at three stations in the lagoon and in a fyke net, in order to estimate the abundance of M. leidyi and to determine its impact on the fishing activity. The results showed an abundance of 2.83 ctenophores m-3. Specimens were all adults, measuring 18 - 62 mm total length. The abundant number of ctenophores (6837 individuals per fyke net) damaged fishing operations, reducing catches and affecting the performance of fishing gears. Since there is no effective mechanical, chemical or biological method to counter M. leidyi, the short term economic damage may be approached by new management measures of fisheries. In addition, other actions against the recurring of M. leidyi invasion, can include management strategies, in particular those finalized to reduce the high trophic state of the lagoon.

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“…It became particularly infamous for causing major ecological and economic damage to the Black Sea ecosystem after its introduction in the 1980s Stone 2005). Its presence in northern European waters has been reported in some Netherlands estuaries where it probably existed already since several years (Faasse and Bayha 2006), and recent records indicate a progressive eastward spread (Janas and Zgrundo 2007;Javidpour et al 2006;Kube et al 2007;Lehtiniemi et al 2007). In the southwest Baltic Sea, the first record of M. leidyi was October 2006 (Javidpour et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Seasonal changes and population dynamics of the ctenophore Mnemiopsis leidyi after its first year of invasion in the Kiel Fjord, Western Baltic Sea

et al. 2008

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We analyzed the seasonal variations of the ctenophore Mnemiopsis leidyi weekly collected since its first record in the western Baltic Sea in October 2006. The distribution pattern together with the seasonal dynamics and population outbreaks in late summer 2007 indicate recent successfully establishment of M. leidyi in this area. Seasonal changes showed two periods of high reproductive activity characterized by a population structure dominated by small size classes, followed by an increase of larger ones. These results further revealed that the bulk of the population remains in deep layers during the periods of low population density, whereas it appeared situated in upper layers during the proliferation of the species. We further emphasized the strength of the population outbreaks, which can reach abundances [10-fold higher in time periods shorter than a week. The predatory impact this species may have in pelagic ecosystems warns on the importance of its recent range of expansion.

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Mnemiopsis leidyi in the Baltic Sea – distribution and overwintering between autumn 2006 and spring 2007

Cited by 50 publications

References 26 publications

Molecular evidence for the occurrence of ctenophore Mertensia ovum in the northern Baltic Sea and implications for the status of the Mnemiopsis leidyi invasion

Molecular evidence for the occurrence of ctenophore Mertensia ovum in the northern Baltic Sea and implications for the status of the Mnemiopsis leidyi invasion

First detection of Mnemiopsis leidyi (Ctenophora, Bolinopsidae) in Sardinia (S’Ena Arrubia Lagoon, Western Mediterranean): a threat for local fishery and species recruitment

Seasonal changes and population dynamics of the ctenophore Mnemiopsis leidyi after its first year of invasion in the Kiel Fjord, Western Baltic Sea

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