Johngarthia oceanica, also known as Clipperton crab, is a bright orange species of land crab that lives on Clipperton Island and on Socorro Island in the Revillagigedo Islands off Mexico in the tropical eastern Pacific.[1] Prior to 2019, J. oceanica was considered part of J. planata,[2][3] however a reexamination determined the land crabs on the oceanic islands to be a separate species. J. oceanica differs from J. planata in the shape of the mesial lobe of the infraorbital margin and the color of its carapace.[1]
Johngarthia oceanica is omnivorous and feeds on seaweed (algae), vegetation and sometimes carrion. It has been observed climbing trees to feast on leaves.[4]
On Clipperton, the introduction of species that prey on the land crabs has had a significant impact on the island's vegetation. The introduction of pigs on Clipperton Island by guano miners in the 1890s reduced the crab population, which allowed grassland to gradually cover about 80 percent of the atoll's land surface.[5] The elimination of these pigs in 1958 caused most of this vegetation to disappear, resulting in the return of millions of crabs.[2][6] The introduction of ship rats from shipwrecks on the island in the late 20th/early 21st century has led to a decline in the crab population, causing a corresponding increase in both vegetation and coconut palms.[6]
Studies of predation upon land crabs on Socorro Island found that the crabs make up a significant portion of the yellow-crowned night herons's diet. Predation by red-tailed hawks and, to a limited degree, feral cats was also noted.[4]
Referencesedit
Notes
^ abPerger, Robert (2019-04-12). "A New Species of Johngarthia from Clipperton and Socorro Islands in the Eastern Pacific Ocean (Crustacea: Decapoda: Gecarcinidae)". Pacific Science. 73 (2): 285. doi:10.2984/73.2.9. ISSN 0030-8870. S2CID 146030476.
^ abDavie, P. (2015). Bieler R, Bouchet P, Gofas S, Marshall B, Rosenberg G, La Perna R, Neubauer TA, Sartori AF, Schneider S, Vos C, ter Poorten JJ, Taylor J, Dijkstra H, Finn J, Bank R, Neubert E, Moretzsohn F, Faber M, Houart R, Picton B, Garcia-Alvarez O (eds.). "Johngarthia planata (Stimpson, 1860)". MolluscaBase. World Register of Marine Species. Retrieved 22 February 2017.
^Robert Perger; Jorge Cortes & Cristian Pacheco (2013). "Closing a distributional gap of over 3000 km and encountering an invisible barrier: new presence/absence data for Johngarthia planata Stimpson, 1860 (Decapoda, Brachyura, Gecarcinidae) for Central America and biogeographic notes on East Pacific Gecarcinidae". Crustaceana. 86 (3): 268–277. doi:10.1163/15685403-00003172.
^ abOrtega-Rubio, Alfredo; Jímenez, María Luisa; Llinas, Jorge; Arnaud, Gustavo (1997). "Some Ecological Aspects of the Land Crab, Gecarcinus planatus Stimpson, at Socorro Island, Colima, Mexico". Journal of the Arizona-Nevada Academy of Science. 30 (1): 17–22. ISSN 0193-8509. JSTOR 40022435.
^Sachet, Marie-Hélène (1962). Geography and land ecology of Clipperton Island. Pacific Science Board, National Academy of Sciences-National Research Council.
^ abPitman, Robert L.; Lisa T. Ballance; Charly Bost (2005). (PDF). Marine Ornithology. 33 (2): 193–194. Archived from the original (PDF) on 2020-11-19. Retrieved 2017-05-29.
External linksedit
Media related to Johngarthia oceanica at Wikimedia Commons
Data related to Johngarthia oceanica at Wikispecies
January 01, 1970
johngarthia, oceanica, also, known, clipperton, crab, bright, orange, species, land, crab, that, lives, clipperton, island, socorro, island, revillagigedo, islands, mexico, tropical, eastern, pacific, prior, 2019, oceanica, considered, part, planata, however, . Johngarthia oceanica also known as Clipperton crab is a bright orange species of land crab that lives on Clipperton Island and on Socorro Island in the Revillagigedo Islands off Mexico in the tropical eastern Pacific 1 Prior to 2019 J oceanica was considered part of J planata 2 3 however a reexamination determined the land crabs on the oceanic islands to be a separate species J oceanica differs from J planata in the shape of the mesial lobe of the infraorbital margin and the color of its carapace 1 Johngarthia oceanica Scientific classification Domain Eukaryota Kingdom Animalia Phylum Arthropoda Class Malacostraca Order Decapoda Suborder Pleocyemata Infraorder Brachyura Family Gecarcinidae Genus Johngarthia Species J oceanica Binomial name Johngarthia oceanicaPerger 2019 Johngarthia oceanica is omnivorous and feeds on seaweed algae vegetation and sometimes carrion It has been observed climbing trees to feast on leaves 4 On Clipperton the introduction of species that prey on the land crabs has had a significant impact on the island s vegetation The introduction of pigs on Clipperton Island by guano miners in the 1890s reduced the crab population which allowed grassland to gradually cover about 80 percent of the atoll s land surface 5 The elimination of these pigs in 1958 caused most of this vegetation to disappear resulting in the return of millions of crabs 2 6 The introduction of ship rats from shipwrecks on the island in the late 20th early 21st century has led to a decline in the crab population causing a corresponding increase in both vegetation and coconut palms 6 Studies of predation upon land crabs on Socorro Island found that the crabs make up a significant portion of the yellow crowned night herons s diet Predation by red tailed hawks and to a limited degree feral cats was also noted 4 References editNotes a b Perger Robert 2019 04 12 A New Species of Johngarthia from Clipperton and Socorro Islands in the Eastern Pacific Ocean Crustacea Decapoda Gecarcinidae Pacific Science 73 2 285 doi 10 2984 73 2 9 ISSN 0030 8870 S2CID 146030476 a b Davie P 2015 Bieler R Bouchet P Gofas S Marshall B Rosenberg G La Perna R Neubauer TA Sartori AF Schneider S Vos C ter Poorten JJ Taylor J Dijkstra H Finn J Bank R Neubert E Moretzsohn F Faber M Houart R Picton B Garcia Alvarez O eds Johngarthia planata Stimpson 1860 MolluscaBase World Register of Marine Species Retrieved 22 February 2017 Robert Perger Jorge Cortes amp Cristian Pacheco 2013 Closing a distributional gap of over 3000 km and encountering an invisible barrier new presence absence data for Johngarthia planata Stimpson 1860 Decapoda Brachyura Gecarcinidae for Central America and biogeographic notes on East Pacific Gecarcinidae Crustaceana 86 3 268 277 doi 10 1163 15685403 00003172 a b Ortega Rubio Alfredo Jimenez Maria Luisa Llinas Jorge Arnaud Gustavo 1997 Some Ecological Aspects of the Land Crab Gecarcinus planatus Stimpson at Socorro Island Colima Mexico Journal of the Arizona Nevada Academy of Science 30 1 17 22 ISSN 0193 8509 JSTOR 40022435 Sachet Marie Helene 1962 Geography and land ecology of Clipperton Island Pacific Science Board National Academy of Sciences National Research Council a b Pitman Robert L Lisa T Ballance Charly Bost 2005 Clipperton Island pig sty rat hole and booby prize PDF Marine Ornithology 33 2 193 194 Archived from the original PDF on 2020 11 19 Retrieved 2017 05 29 External links edit nbsp Media related to Johngarthia oceanica at Wikimedia Commons nbsp Data related to Johngarthia oceanica at Wikispecies Retrieved from https en wikipedia org w index php title Johngarthia oceanica amp oldid 1186887508, wikipedia, wiki, book, books, library,
