AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Calyptraea chinensis [WoRMS] | |
Authority | (Linnaeus, 1758) | |
Family | Calyptraeidae | |
Order | Littorinimorpha | |
Class | Gastropoda | |
Phylum | Mollusca | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Not entered Comments: Europe North-east Atlantic |
Life form / Life stage (?) |
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Sociability / Life stage (?) |
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Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Sexual References: Wyatt, H. V. 1961. The Reproduction, Growth and Distribution of Calyptraea chinensis (L.). Journal of Animal Ecology, 30(2), pp. 283–302. Smith, I. 2023. Calyptraea chinensis (Linnaeus, 1758) Identification and Biology. 10.13140/RG.2.2.21314.35520. Comments: C. chinensis is a protandrous hermaphrodite. The males associate with the females only for copulation, and afterwards wander until they find smooth surfaces such as shells, stones. All young are born as males andperform as functional males through the first breeding season lasting three or four months.Then remaining sperm is absorbed, the penis reduced and lost, and the open-groove vasdeferens closes to form the oviduct as the male transitions to live for one or two years as afunctioning female. |
Developmental trait (?) | Brooding References: Smith, I. 2023. Calyptraea chinensis (Linnaeus, 1758) Identification and Biology. 10.13140/RG.2.2.21314.35520. Comments: The female holds each capsule with the anterior of the foot for a time before attaching it by itsthin end to the substrate under the anterior of her shell where it will be oxygenated by thestrong inhalant current. Ova are concentrated in the wide end of capsules. The femaleincubates the capsules until, having passed the veliger stage within the capsules, the youngemerge as crawling juveniles with an embryonic spiral shell of one and a half coils whichforms the protoconch of later stages. |
Characteristic feeding method / Life stage (?) |
References (not structured): Smith, I. 2023. Calyptraea chinensis (Linnaeus, 1758) Identification and Biology. 10.13140/RG.2.2.21314.35520. Comments: C. chinensis like bivalves by filtering phytoplankton and suspended organic particles from the water. A strong transverse, left to right, respiratory current is created by ciliacovering the large ctenidium. The current carries in large amounts of food material |
Mobility / Life stage (?) |
References (not structured): Wyatt, H. V. 1961. The Reproduction, Growth and Distribution of Calyptraea chinensis (L.). Journal of Animal Ecology, 30(2), pp. 283–302. Comments: Adults lives attached to hard substrate (stones, rocks, shells) in sheltered areas with sand or muddy sand. Eggs attached to the substrate within the adult's shell. Juvenile are initially mobile, later becoming sessile. |
Salinity tolerance range (?) | Exact range: 15 - 35 References: Ocean Biodiversity Information System (OBIS). Calyptraea chinensis (Linnaeus, 1758). Available at: https://obis.org/taxon/138961 (Accessed: [2024-07-08]). Comments: C. chinensis generally tolerates salinity levels typical of marine environments, around 30-35 ppt, but may also survive in slightly varying salinities found in estuarine areas. |
Habitat modifying ability potential (?) | Unknown |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Unknown |
Known human health impact? | Not known |
Known economic impact? | Not known |
Known measurable environmental impact? | Not known |
Included in the Target Species list? | Yes 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, 2024-07-08 |