AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Jassa marmorata [WoRMS] | |
Authority | Holmes, 1905 | |
Family | Ischyroceridae | |
Order | Amphipoda | |
Class | Malacostraca | |
Phylum | Arthropoda | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Ocean: Atlantic --> Ocean region: NE Atlantic --> Ocean region: NW Atlantic References: Hewitt, C. L., Campbell, M. L., Thresher, R. E., Martin, R. B., Boyd, S., Cohen, B. F., ... & Lockett, M. M. (2004). Introduced and cryptogenic species in port Phillip bay, Victoria, Australia. Marine biology, 144(1), 183-202. |
Life form / Life stage (?) |
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Sociability / Life stage (?) |
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Reproductive frequency (?) | Iteroparous References (not structured): Clark, R., Caudill, C. C. 2001. Females of the marine amphipod Jassa marmorata mate multiple times with the same or different males. Comments: Males mate multiple times, while females mate only once. |
Reproductive type (?) | Sexual References: Scinto, A., Benvenuto, C., Cerrano, C., Mori, M. 2007. Seasonal cycle of Jassa marmorata Holmes, 1903 (Amphipoda) in the Ligurian Sea (Mediterranean, Italy). Journal of Crustacean Biology, 27(2), pp. 212-216. Comments: Amphipods of the genus Jassa not only have strong sexual dimorphism, but also have dimorphism within males, with 'major' forms having large gnathopods and large 'thumbs', and smaller 'minor' forms having much smaller gnathopods and thumbs. |
Developmental trait (?) | Brooding |
Characteristic feeding method / Life stage (?) |
Comments: J. marmorata appears to be primarily a suspension feeder on phytoplankton and detritus, but also preys on ostracods and other small crustaceans. |
Mobility / Life stage (?) |
References (not structured): Scinto, A., Benvenuto, C., Cerrano, C., Mori, M. 2007. Seasonal cycle of Jassa marmorata Holmes, 1903 (Amphipoda) in the Ligurian Sea (Mediterranean, Italy). Journal of Crustacean Biology, 27(2), pp. 212-216. Comments: Females spend their life within their tubes, feeding, mating, and tending their young. Amphipods of the genus Jassa are very abundant in temperate coastal zones, they can form dense tube colonies on hard substrata including macroalgae, where they can co-occur. |
Salinity tolerance range (?) | Exact range: 12 - 38 Comments: It is known mostly from polyhaline-marine salinities (18-38 PSU), but has been collected at salinities as low as 12 PSU. |
Habitat modifying ability potential (?) | Allogenic ecosystem engineers References: Scinto, A., Benvenuto, C., Cerrano, C., Mori, M. 2007. Seasonal cycle of Jassa marmorata Holmes, 1903 (Amphipoda) in the Ligurian Sea (Mediterranean, Italy). Journal of Crustacean Biology, 27(2), pp. 212-216. Comments: It constructs tubes from debris amongst algae, hydroid growths and on solid surfaces in sediment and areas of strong water currents such as pilings, buoys, rafts or the hulls of ships. |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Unknown Comments: Not available. |
Known human health impact? | Known Comments: Harmless. |
Known economic impact? | Known References: Barnard, J. Laurens, 1958. Amphipod crustaceans as fouling organisms in Los Angeles-Long Beach Harbors, with reference to the influence of seawater turbidity, California Fish and Game, 44(2), pp. 161-170. Comments: J. marmorata fouls pilings in Los Angeles-Long Beach Harbor, covering them with masses of tubes covered with sediment, but perhaps provides a benefit by discouraging boring organisms. |
Known measurable environmental impact? | Known References: Barnard, J. Laurens, 1958. Amphipod crustaceans as fouling organisms in Los Angeles-Long Beach Harbors, with reference to the influence of seawater turbidity, California Fish and Game, 44(2), pp. 161-170. Comments: Dense masses of amphipod tubes may discourage settlement by boring organisms and other foulers, such as the tunicate Ciona spp. They can also provide habitat for other organisms, such as predatory polychaetes. |
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 [Accessed 1 July 2024]. |
Association with vessel vectors (?) | Ballast waters Biofouling References: Hewitt, C. L., Campbell, M. L., Thresher, R. E., Martin, R. B., Boyd, S., Cohen, B. F., ... & Lockett, M. M. (2004). Introduced and cryptogenic species in port Phillip bay, Victoria, Australia. Marine biology, 144(1), 183-202. |
Last update by | Sandra Gečaitė, 2024-08-12 |