AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Schyzocotyle acheilognathi [WoRMS] | |
Authority | (Yamaguti, 1934) Brabec, Waeschenbach, Scholz, Littlewood & Kuchta, 2015 | |
Family | Bothriocephalidae | |
Order | Bothriocephalidea | |
Class | Cestoda | |
Phylum | Platyhelminthes | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Not entered Comments: East Asia China |
Life form / Life stage (?) |
References (not structured): Fu, P. P., Xiong, F., Wu, S. G., Zou, H., Li, M., Wang, G. T., Li, W. X. 2022. Effects of Schyzocotyle acheilognathi (Yamaguti, 1934) infection on the intestinal microbiota, growth and immune reactions of grass carp (Ctenopharyngodon idella). Plos one, 17(4), e0266766. |
Sociability / Life stage (?) |
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Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Sexual References: Fu, P. P., Xiong, F., Wu, S. G., Zou, H., Li, M., Wang, G. T., Li, W. X. 2022. Effects of Schyzocotyle acheilognathi (Yamaguti, 1934) infection on the intestinal microbiota, growth and immune reactions of grass carp (Ctenopharyngodon idella). Plos one, 17(4), e0266766. Comments: The worm is a hermaphrodite, and so populations can grow from just one parasite. |
Developmental trait (?) | Brooding References: Institute of Fisheries Management (2018) Schyzocotyle acheilognathi. Available at: https://ifm.org.uk/wp-content/uploads/2018/08/Schyzocotyle-acheilognathi.pdf (Accessed: 23 July 2024). Comments: The life cycle is temperature-dependant. It can be as short as a month or it may take up to a year. Each segment of the adult worm is capable of producing eggs, with individual parasites able to produce up to 20,000 eggs per day. Eggs are shed with the faeces into the water, where they infect the copepods. |
Characteristic feeding method / Life stage (?) |
Comments: Parasite. It is found in the intestine of many fish species. Common carp (Cyprinus carpio), grass carp (Ctenophyaryngodon idella) and crucian carp (Carassius carassius) are most commonly infected. |
Mobility / Life stage (?) |
Comments: The parasite has a long, ribbon-like, segmented body and a characteristic heartshaped head (the scolex) which it uses to attach to the intestine wall. |
Salinity tolerance range (?) | Venice system: 1. Limnetic [<0.5psu] References: Hansen H, Alarcón M (2019) First record of the Asian fish tapeworm Schyzocotyle (Bothriocephalus) acheilognathi (Yamaguti, 1934) in Scandinavia. BioInvasions Records 8(2): 437–441, https://doi.org/10.3391/bir.2019.8.2.26 |
Habitat modifying ability potential (?) | Unknown Comments: Not available. |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Unknown Comments: Not available. |
Known human health impact? | Not known Comments: Not available. |
Known economic impact? | Known References: Fu, P. P., Xiong, F., Wu, S. G., Zou, H., Li, M., Wang, G. T., Li, W. X. 2022. Effects of Schyzocotyle acheilognathi (Yamaguti, 1934) infection on the intestinal microbiota, growth and immune reactions of grass carp (Ctenopharyngodon idella). Plos one, 17(4), e0266766. Comments: Grass carp (Ctenopharyngodon idella) is one of the most important economic freshwater fish species in China, where the production reached 5.5 million tons in 2019 and constitutes 21.6% of the total freshwater-cultured fish annual output. S. acheilognathi is one of the most harmful pathogens to grass carp. |
Known measurable environmental impact? | Known References: De León, G. P. P., Lagunas-Calvo, O., García-Prieto, L., Briosio-Aguilar, R., Aguilar-Aguilar, R. 2018. Update on the distribution of the co-invasive Schyzocotyle acheilognathi (= Bothriocephalus acheilognathi), the Asian fish tapeworm, in freshwater fishes of Mexico. Journal of helminthology, 92(3), pp. 279-290. Comments: S. acheilognathi can block the intestine. Individual tapeworms, which can measure up to 50cm, attach at the top of the intestine, which can stop food from passing through. Once attached, S. acheilognathi absorbs nutrients from within the intestine. Large numbers of parasites can considerably reduce the growth, condition, development and nutritional health of infected fish. |
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 Comments: Possible by ballast water transfer. |
Molecular information | Available NCBI (https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?term=Schyzocotyle+acheilognathi) |
Created by | Aleksas Narščius, 2020-02-17 |
Last update by | Sandra Gečaitė, 2024-07-23 |