AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Obesogammarus crassus [WoRMS] | |
Authority | (Sars G.O., 1894) | |
Family | Pontogammaridae | |
Order | Amphipoda | |
Class | Malacostraca | |
Phylum | Arthropoda | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Not entered Comments: Ponto-Caspian basin Black sea Caspian Sea |
Life form / Life stage (?) |
References (not structured): Konopacka, A., Jażdżewski, K. 2002. Obesogammarus crassus (GO Sars, 1894)-one more Ponto-Caspian gammarid species in Polish waters. Fragmenta faunistica, 45(1), pp. 19-26. |
Sociability / Life stage (?) |
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Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Sexual Comments: O. crassus has a relatively short life span and generation time. It does not grow rapidly, but has an early sexual maturity. |
Developmental trait (?) | Brooding References: Li, Jane S. , C. Patel, and A. Bartos, 2024, Obesogammarus crassus (G.O. Sars, 1894): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, and NOAA Great Lakes Aquatic Nonindigenous Species Information System, Ann Arbor, MI, https://nas.er.usgs.gov/queries/greatlakes/FactSheet.aspx?Species_ID=3615&Potential=Y&Type=2&HUCNumber=, Revision Date: 8/27/2021, Access Date: 7/22/2024 Comments: The female carries the eggs in a brood pouch and the average brood size is 25.33. This species has a breeding period of 7 months and has an average of 3 generations per year. |
Characteristic feeding method / Life stage (?) |
References (not structured): Li, Jane S. , C. Patel, and A. Bartos, 2024, Obesogammarus crassus (G.O. Sars, 1894): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, and NOAA Great Lakes Aquatic Nonindigenous Species Information System, Ann Arbor, MI, https://nas.er.usgs.gov/queries/greatlakes/FactSheet.aspx?Species_ID=3615&Potential=Y&Type=2&HUCNumber=, Revision Date: 8/27/2021, Access Date: 7/22/2024 Comments: O. crassus is an omnivorous dietary generalist. Juveniles (<7 mm) are primarily detritivores/algivorous, and adults (>7mm) are omnivorous (consuming plants and other invertebrates equally). |
Mobility / Life stage (?) |
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Salinity tolerance range (?) | Exact range: 0.5 - 8.8 References: Olenin, S., & Daunys, D. (2004). Coastal typology based on benthic biotope and community data: the Lithuanian case study. Coastline Reports, 4, 65-84. References: Paavola M, Olenin S, Leppäkoski E (2005) Are invasive species most successful in habitats of low native species richness across European brackish water seas? Estuarine, Coastal and Shelf Science 64 (2005) 738-750 Gasiunas I (1964) Acclimatisation of forage crustaceans into the Kaunas waterpower plant reservoir and possibility of their migration into other waters of Lithuania [Aklimatizacija kormovykh rakoobraznykh v vodokhranilische Kaunasskoj GES i vozmozhnost ikh migracii v drugije vodojemy Litvy. Trudy Ak.Nauk Lit.SSR, Serija B, 1(30) (in Russian) Jazdzewski K, Konopacka A (2000) Immigration history and present distribution of alien crustaceans in Polish waters. In: von J. C. Vaupel Klein and F. R. Schram (eds) The Biodiversity Crisis and Crustacea. Proceedings of the 4th International Crustacean Congress: 2, Brill, Leiden. Crustacean Issues, 12: 55-64 Grabowski M, Konopacka A, Jazdzewski K, Janowska E (2006) Native gammarid species in retreat and invasion of aliens in the Vistula Lagoon (Baltic Sea, Poland). Helgoland Marine Research, 60(2) |
Habitat modifying ability potential (?) | Unknown Comments: Not available. |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Unknown Comments: Not available. |
Known human health impact? | Known Comments: Harmless. |
Known economic impact? | Not known Comments: Not available. |
Known measurable environmental impact? | Known References: Bij de Vaate, A., K. Jażdżewski, H.A.M. Ketelaars, S. Gollasch, and G. van der Velde. 2002. Geographical patterns in range expansion of Ponto-Caspian macroinvertebrate species in Europe. Canadian Journal of Fisheries and Aquatic Sciences, 59(7), pp. 1159-1174. Comments: Obesogammarus crassus, has outcompeted various native species. |
Included in the Target Species list? | No References: HELCOM, 2009. Alien Species and Ballast Water [PDF]. Available at: (https://archive.iwlearn.net/helcom.fi/stc/files/shipping/Table_2_Alienspecies_%20lists_2009.pdf) |
Association with vessel vectors (?) | Ballast waters References: Holdich, D. M., Pöckl, M. 2007. Invasive crustaceans in European inland waters. In Biological invaders in inland waters: Profiles, distribution, and threats, pp. 29-75. Comments: It has been introduced to western European waters via ballast water transport. |
Molecular information | Available Molecular information is available in GenBank under the accession numbers: MT683246-MT683253 |
Last update by | Sandra Gečaitė, 2024-07-22 |