AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Chaetogammarus ischnus [WoRMS] | |
Authority | (Stebbing, 1899) | |
Family | Gammaridae | |
Order | Amphipoda | |
Class | Malacostraca | |
Phylum | Arthropoda | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Not entered Comments: The least saline regions and estuaries of the Black, Azov, and Caspian Seas as well as the Caspian Sea proper |
Life form / Life stage (?) |
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Sociability / Life stage (?) |
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Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Sexual References: Kley A, Maier G (2006) Reproductive characteristics of invasive gammarids in the Rhine-Maine-Danube catchment, south Germany. Limnologica 36(2):79-90. Kley A, Maier G (2003) Life history characteristics of the invasive freshwater gammarids Dikerogammarus villosus and Echinogammarus ischnus in the river Main and the Main-Donau canal. Archiv fuer Hydrobiologie 156(4):457-469. Comments: C. ischnus only reproduces sexually and has no resting stages. |
Developmental trait (?) | Brooding References: Kley A, Maier G (2006) Reproductive characteristics of invasive gammarids in the Rhine-Maine-Danube catchment, south Germany. Limnologica 36(2):79-90. Kley A, Maier G (2003) Life history characteristics of the invasive freshwater gammarids Dikerogammarus villosus and Echinogammarus ischnus in the river Main and the Main-Donau canal. Archiv fuer Hydrobiologie 156(4):457-469. Comments: Brood size varies from 2–51 eggs. Breeding often occurs in spring and summer and ends in the fall, but may occur twice throughout the year in warm, thermally stable waters |
Characteristic feeding method / Life stage (?) |
References (not structured): Krisp H, Maier G (2005) Consumption of macroinvertebrates by invasive and native gammarids: a comparison. Journal of Limnology 64(1):55-59. Kley A, Maier G (2003) Life history characteristics of the invasive freshwater gammarids Dikerogammarus villosus and Echinogammarus ischnus in the river Main and the Main-Donau canal. Archiv fuer Hydrobiologie 156(4):457-469. Comments: feeds on deposits - including those associated with zebra mussels, and preys on other macroinvertebrates such as chironomids, other amphipods, or its own species . |
Mobility / Life stage (?) |
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Salinity tolerance range (?) | Venice system: 1. Limnetic [<0.5psu] References: 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. |
Habitat modifying ability potential (?) | Keystone species References: Dermott, R., J. Witt, Y. M. Young, and M. Gonzalez. 1998. Distribution of the Ponto-Caspian amphipod Echinogammarus ischnus in the Great Lakes and replacement of native Gammarus fasciatus. Journal of Great Lakes Research 24(2):442-452. Comments: C. ischnus is now among the most abundant non-Dreissena invertebrates in benthic communities in the Lake Ontario, L. Michigan, and L. Erie watersheds, where it has displaced native Gmelinoides fasciatus from many areas |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Unknown |
Known human health impact? | Not known |
Known economic impact? | Not known |
Known measurable environmental impact? | Known References: Żytkowicz, J., Kobak, J. 2008. Relationships between the occurrence of Chaetogammarus ischnus (Stebbing, 1898) and Pontogammarus robustoides (GO Sars, 1894)(Crustacea, Amphipoda) in a lowland Polish dam reservoir. Oceanological and Hydrobiological Studies, 37(2), pp. 39-50. Comments: Larger size and more predatory nature of P. robustoides, limiting the occurrence of C. ischnus. |
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 (?) | Unknown |
Last update by | Sandra Gečaitė, 2024-07-09 |