"Black Crab" redirects here. For the 2022 action film, see Black Crab (film).
Scylla serrata (often called mud crabor mangrove crab, although both terms are highly ambiguous, and black crab) is an ecologically important species of crab found in the estuaries and mangroves of Africa, Australia, and Asia. In their most common forms, their shell colours vary from a deep, mottled green to very dark brown.
The natural range of S. serrata is in the Indo-Pacific. It is found from South Africa, around the coast of the Indian Ocean, where it is especially abundant in Sri Lanka, to the Southeast Asian Archipelago, as well as from southern Japan to south-eastern Australia, northern New Zealand,[1] and as far east as Fiji and Samoa.[2] The species has also been introduced to Hawaii and Florida.[2][3]
In Hawaii, mud crabs are colloquially known as Samoan crabs, as they were originally imported from American Samoa. As these crabs are known for their robust size and dense meat content, they have been greatly sought after over the years. As a result of overcrabbing, local government efforts have restricted harvesting of crabs smaller than 6 inches (width across back) and to harvest females of any size is illegal.[4]
Ecologyedit
A study on tidal flats in Deception Bay in Queensland found juvenile crabs (20–99 mm or 0.8–3.9 in carapace width) were resident in the mangrove zone, remaining there during low tide, while subadults (100–149 mm or 3.9–5.9 in) migrated into the intertidal zone to feed at high tide and retreated to subtidal waters at low tide.[5] Adults (150 mm or 5.9 in and larger) were caught mainly below the low-tide mark, with small numbers captured in the intertidal zone at high tide.[5]
These crabs are highly cannibalistic in nature; when crabs undergo molting, other hard-shelled ones sometimes attack the molting crabs and devour them. The females can give birth to a million offspring, which can grow up to 3.5 kg (7.7 lb) in size and have a shell width up to 24 cm (9.4 in) wide.
Referencesedit
^Yaldwyn, John C.; Webber, W. Richard (2011). "Annotated checklist of New Zealand Decapoda (Arthropoda: Crustacea)" (PDF). Tuhinga. Wellington, New Zealand: Museum of New Zealand Te Papa Tongarewa. pp. 171–272. (PDF) from the original on 10 July 2020. Retrieved 23 September 2019.
^J. Masterson (1 December 2007). "Scylla serrata". Indian River Lagoon Species Inventory. Fort Pierce, Florida: Smithsonian Marine Station at Fort Pierce. from the original on 11 August 2021. Retrieved 11 September 2012.
^"Marine Invertebrates and Limu". State of Hawaiʻi Division of Aquatic Resources. from the original on 24 March 2018. Retrieved 23 March 2018.
^ abHill, B. J.; Williams, M. J.; Dutton, P. (1982). "Distribution of juvenile, subadult and adult Scylla serrata (Crustacea: Portunidae) on tidal flats in Australia". Marine Biology. 69 (1): 117–120. doi:10.1007/BF00396967. S2CID 83951720.
External linksedit
Wikimedia Commons has media related to Scylla serrata.
Australia: Queensland government page on mangrove crab aquaculture
Life Cycle of the Mud Crab – Fishnote No.11 March 2007, Northern Territory
February 16, 2024
scylla, serrata, black, crab, redirects, here, 2022, action, film, black, crab, film, often, called, crabor, mangrove, crab, although, both, terms, highly, ambiguous, black, crab, ecologically, important, species, crab, found, estuaries, mangroves, africa, aus. Black Crab redirects here For the 2022 action film see Black Crab film Scylla serrata often called mud crabor mangrove crab although both terms are highly ambiguous and black crab is an ecologically important species of crab found in the estuaries and mangroves of Africa Australia and Asia In their most common forms their shell colours vary from a deep mottled green to very dark brown Scylla serrataScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ArthropodaClass MalacostracaOrder DecapodaSuborder PleocyemataInfraorder BrachyuraFamily PortunidaeGenus ScyllaSpecies S serrataBinomial nameScylla serrata Forsskal 1775 Contents 1 Distribution 2 Ecology 3 References 4 External linksDistribution editThe natural range of S serrata is in the Indo Pacific It is found from South Africa around the coast of the Indian Ocean where it is especially abundant in Sri Lanka to the Southeast Asian Archipelago as well as from southern Japan to south eastern Australia northern New Zealand 1 and as far east as Fiji and Samoa 2 The species has also been introduced to Hawaii and Florida 2 3 In Hawaii mud crabs are colloquially known as Samoan crabs as they were originally imported from American Samoa As these crabs are known for their robust size and dense meat content they have been greatly sought after over the years As a result of overcrabbing local government efforts have restricted harvesting of crabs smaller than 6 inches width across back and to harvest females of any size is illegal 4 Ecology editA study on tidal flats in Deception Bay in Queensland found juvenile crabs 20 99 mm or 0 8 3 9 in carapace width were resident in the mangrove zone remaining there during low tide while subadults 100 149 mm or 3 9 5 9 in migrated into the intertidal zone to feed at high tide and retreated to subtidal waters at low tide 5 Adults 150 mm or 5 9 in and larger were caught mainly below the low tide mark with small numbers captured in the intertidal zone at high tide 5 These crabs are highly cannibalistic in nature when crabs undergo molting other hard shelled ones sometimes attack the molting crabs and devour them The females can give birth to a million offspring which can grow up to 3 5 kg 7 7 lb in size and have a shell width up to 24 cm 9 4 in wide References edit Yaldwyn John C Webber W Richard 2011 Annotated checklist of New Zealand Decapoda Arthropoda Crustacea PDF Tuhinga Wellington New Zealand Museum of New Zealand Te Papa Tongarewa pp 171 272 Archived PDF from the original on 10 July 2020 Retrieved 23 September 2019 a b Species Fact Sheets Scylla serrata Food and Agriculture Organization Retrieved 26 October 2018 J Masterson 1 December 2007 Scylla serrata Indian River Lagoon Species Inventory Fort Pierce Florida Smithsonian Marine Station at Fort Pierce Archived from the original on 11 August 2021 Retrieved 11 September 2012 Marine Invertebrates and Limu State of Hawaiʻi Division of Aquatic Resources Archived from the original on 24 March 2018 Retrieved 23 March 2018 a b Hill B J Williams M J Dutton P 1982 Distribution of juvenile subadult and adult Scylla serrata Crustacea Portunidae on tidal flats in Australia Marine Biology 69 1 117 120 doi 10 1007 BF00396967 S2CID 83951720 External links edit nbsp Wikimedia Commons has media related to Scylla serrata Australia Queensland government page on mangrove crab aquaculture Cycle of the mud crab Life Cycle of the Mud Crab Fishnote No 11 March 2007 Northern Territory Retrieved from https en wikipedia org w index php title Scylla serrata amp oldid 1180155283, wikipedia, wiki, book, books, library,
