AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Limulus polyphemus [WoRMS] | |
Authority | (Linnaeus, 1758) | |
Family | Limulidae | |
Order | Xiphosurida | |
Class | Merostomata | |
Phylum | Arthropoda | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Not entered Comments: NW Atlantic |
Life form / Life stage (?) |
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Sociability / Life stage (?) |
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Reproductive frequency (?) | Iteroparous |
Reproductive type (?) | Sexual References: Brockmann, H. J., Smith, M. D. 2009. Reproductive competition and sexual selection in horseshoe crabs. In Biology and conservation of horseshoe crabs, pp. 199-221. Comments: After the female has laid a batch of eggs in a nest at a depth of 15–20 cm in the sand, the male or males fertilize them with their sperm. Egg quantity is dependent on the female's body size, and ranges from 15,000 to 64,000 eggs per female. |
Developmental trait (?) | Spawning References: Sasson, D. A., Chabot, C. C., Mattei, J. H., Brunson, J. F., Hall, F. K., Huber, J. H., ... Kendrick, M. R. 2024. The American horseshoe crab (Limulus polyphemus) spawns regularly in salt marshes. Frontiers in Ecology and the Environment, e2738. |
Characteristic feeding method / Life stage (?) |
References (not structured): Botton, M. L. 1984. Diet and food preferences of the adult horseshoe crab Limulus polyphemus in Delaware Bay, New Jersey, USA. Marine Biology, 81, pp. 199-207. Comments: Adult horseshoe crabs feed on a variety of bottom-dwelling organisms including marine worms, shellfish and decaying animal matter. The larvae and juvenile stages are preyed upon by many species of fish. |
Mobility / Life stage (?) |
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Salinity tolerance range (?) | Exact range: 5 - 70 References: Ehlinger, G. S., Tankersley, R. A. 2004. Survival and development of horseshoe crab (Limulus polyphemus) embryos and larvae in hypersaline conditions. The Biological Bulletin, 206(2), pp. 87-94. Ehlinger, G. S., Tankersley, R. A. 2009. Ecology of horseshoe crabs in microtidal lagoons. Biology and conservation of horseshoe crabs, pp. 149-162. Comments: Salinity tolerance also varies with life-history stage. Embryos developed, hatched, and molted to the first juvenile instar at 60 ppt, and larvae survived at salinities from 10 to 70 ppt. Juveniles are able to withstand salinities of 12 ppt for several days. Adults can with-stand direct transfer from 25 ppt to 13 ppt with no adverse effects, but transfer to 6 ppt causes swelling of the limb joints and gills. Limulus polyphemus generally occurs in estuaries where the salinity ranges from 5 to 34. |
Habitat modifying ability potential (?) | Keystone species Comments: The Horseshoe Crab, an important keystone species of the Delaware Bay, is an animal that is very much depended upon by many other species participating in the ecosystem. Shorebirds such as the Red Knot (Calidris canutus), Ruddy Turnstone (Arenaria interpres), and the Sanderling (Calidris alba) depend upon Horseshoe Crab eggs deposited along the banks of the Delaware Bay for their own nutritional welfare. |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Anthropogenic chemical compounds References: Burger, J., Dixon, C., Shukla, T., Tsipoura, N., Gochfeld, M. 2002. Metal levels in horseshoe crabs (Limulus polyphemus) from Maine to Florida. Environmental research, 90(3), pp. 227-236. |
Known human health impact? | Known References: Walls, E. A., Berkson, J. 2003. Effects of blood extraction on horseshoe crabs (Limulus polyphemus). Comments: Horse-shoe crabs are also essential for public health. Biomedical companies bleed horse-shoe crabs to extract a chemical used to detect the presence of endotoxins pathogenic to humans in injectable and implantable medical devices. |
Known economic impact? | Known References: Walls, E. A., Berkson, J., Smith, S. A. 2002. The horseshoe crab, Limulus polyphemus: 200 million years of existence, 100 years of study. Reviews in Fisheries Science, 10(1), pp. 39-73. Comments: Horseshoe crabs play a role in the economy of three diverse industries and user groups: wildlife viewing and birding enthusiasts together with the ecotourism industry, the biomedical industry, and the Atlantic Coast commercial eel and whelk (conch) pot fisheries, |
Known measurable environmental impact? | Known References: Botton, M. L. 1984. The importance of predation by horseshoe crabs, Limulus polyphemus, to an intertidal sand flat community. |
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: Not available. |
Last update by | Sandra Gečaitė, 2024-07-17 |