Jasus paulensis

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Jasus paulensis
Jatris.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Malacostraca
Order: Decapoda
Suborder: Pleocyemata
Family: Palinuridae
Genus: Jasus
Species:
J. paulensis
Binomial name
Jasus paulensis
(Heller, 1862) [2]
Jasus distribution.svg
Jasus distribution map; J. paulensis live in the blue and red areas
Synonyms
  • Jasus tristani Holthuis, 1963
  • Palinurus paulensis Heller, 1862
The coat of arms of Tristan da Cunha features St Paul rock lobsters as supporters Coat of arms of Tristan da Cunha.svg
The coat of arms of Tristan da Cunha features St Paul rock lobsters as supporters

Jasus paulensis, also commonly known as the St Paul rock lobster, is a species of spiny lobster found in the waters around Saint Paul Island in the southern Indian Ocean and around Tristan da Cunha in the southern Atlantic Ocean. At one time the rock lobsters on Tristan da Cunha were believed to be a separate species known as the Tristan rock lobster (Jasus tristani), but the use of mitochondrial DNA sequencing has shown them to be identical. [3] Some authorities, for example the International Union for Conservation of Nature, retain them as separate species. [4] [5] The Tristan rock lobster features on the coat of arms and the flag of Tristan da Cunha.

Contents

Description

Males of this species grow to a total length of about 34 cm (13 in) with a carapace length of 13 cm (5 in) while females may attain a total length of 24 cm (9 in). Like other rock lobsters, it lacks chelae (claws) on its front pair of walking legs. The carapace is armoured with large flat spines, about as wide as they are long, mixed with small spines. The first few abdominal segments are sculptured with fine transverse grooves at the front of each segment with a smoother area behind. [6]

Distribution and habitat

Although this spiny lobster was originally known only from St Paul and neighbouring New Amsterdam Islands in the southern Indian Ocean, more recently it has been discovered on other seamounts on the Southwest Indian Ridge, so its range is rather larger than originally thought. [1] A previously recognised species Jasus tristani, found around Tristan da Cunha in the southern Atlantic Ocean, has now been synonymised with J. paulensis. [2] This is an uncommon species throughout its range and is usually found at depths between 10 and 35 m (33 and 115 ft) but occasionally down to about 60 metres (200 ft). It is found on rocks and among kelp. [1]

Ecology

Jasus paulensis is nocturnal. It feeds on seaweeds and scavenges on dead animal material. The eggs are laid from May onwards and the female incubates them under her tail for several months. [6]

Fishery

Lobster traps in Tristan da Cuhna Preparing the lobster traps (25143993838).jpg
Lobster traps in Tristan da Cuhna

Early visitors to St Paul found that it was possible to catch a lobster by hand in shallow water in the crater lake bay, take it to a nearby submarine hot spring, and cook it, without ever removing it from the water. [6] In 1928, a large-scale fishery and cannery for the spiny lobster using lobster pots was set up on St Paul, but the company went bankrupt three years later, stranding seven people on the island and leading to a tragedy known as "Les Oubliés de Saint-Paul" (the forgotten ones of Saint-Paul). [7] In the next two decades, there were several, largely unsuccessful, attempts to harvest the lobsters using factory ships. In the period 1950 to 1956, the spiny lobsters were harvested by the French company Sapmer with about 260 tonnes of lobster tails being processed annually (equivalent to about 800 tonnes of whole lobster). [6] This company still operates factory vessels equipped with deep-freeze facilities in the area. [8]

Before 1950, the rock lobster on the Tristan da Cunha archipelago was only fished for local consumption. Since then, companies such as the South Atlantic Islands Development Corporation have exploited it. Production peaked in the 1970s, with over 800  tonnes being collected in some years, but the industry has since waned, with less than 400 t being caught most years since 1992. [9] The fishery became MSC-certified in 2011, and the current TAC total still stands at about 400 tonnes annually. Since 1996 it has been harvested by Ovenstone Agencies in a partnership with the Island Govt scheduled to last at least until 2026.

Related Research Articles

<span class="mw-page-title-main">Spiny lobster</span> Family of crustaceans

Spiny lobsters, also known as langustas, langouste, or rock lobsters, are a family (Palinuridae) of about 60 species of achelate crustaceans, in the Decapoda Reptantia. Spiny lobsters are also, especially in Australia, New Zealand, Ireland, South Africa, and the Bahamas, called crayfish, sea crayfish, or crawfish, terms which elsewhere are reserved for freshwater crayfish.

<i>Jasus edwardsii</i> Species of crustacean

Jasus edwardsii, the southern rock lobster, red rock lobster, or spiny rock lobster, is a species of spiny lobster found throughout coastal waters of southern Australia and New Zealand including the Chatham Islands. It is commonly called crayfish in Australia and New Zealand and kōura in Māori. They resemble lobsters, but lack the large characteristic pincers on the first pair of walking legs.

<span class="mw-page-title-main">Lobster fishing</span> Aspect of the fishing industry

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<i>Panulirus cygnus</i> Species of crustacean

Panulirus cygnus is a species of spiny lobster, found off the west coast of Australia. Panulirus cygnus is the basis of Australia's most valuable fishery, making up 20% of value of Australia's total fishing industry, and is identified as the western rock lobster.

<span class="mw-page-title-main">St. Paul's fingerfin</span> Species of fish

St. Paul's fingerfin, is a species of marine ray-finned fish, traditionally regarded as belonging to the family Cheilodactylidae, the members of which are commonly known as morwongs. It is native to the southwestern Indian Ocean and southeastern Atlantic Ocean.

<i>Palinurus elephas</i> Species of crustacean

Palinurus elephas is a commonly caught species of spiny lobster from the East Atlantic Ocean and the Mediterranean Sea. Its common names include European spiny lobster, crayfish or cray, crawfish, common spiny lobster, Mediterranean lobster and red lobster.

<i>Sebastes capensis</i> Species of fish

Sebastes capensis, the false jacopever or Cape redfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the South Atlantic Ocean and may also occur off southern and western South America.

<i>Panulirus versicolor</i> Species of crustacean

Panulirus versicolor is a species of spiny lobster that lives in tropical reefs in the Indo-Pacific. Other names include painted lobster, common rock lobster, bamboo lobster, blue lobster, and blue spiny lobster. P. versicolor is one of the three most common varieties of spiny lobster in Sri Lanka, alongside Panulirus homarus and Panulirus ornatus.

<i>Jasus</i> Genus of lobsters

Jasus is a genus of spiny lobsters which live in the oceans of the Southern Hemisphere. They have two distinct "horns" projecting from the front of the carapace, but lack the stridulating organs present in almost all other genera of spiny lobsters. Like all spiny lobsters, they lack claws, and have long stout antennae which are quite flexible.

<i>Jasus lalandii</i> Species of spiny lobster of the family Palinuridae from South Africa

Jasus lalandii, the Cape rock lobster or West Coast rock lobster or South African rock lobster, is a species of spiny lobster found off the coast of Southern Africa. It is not known whom the specific epithet lalandii commemorates, although it may the French naturalist and taxonomer Pierre Antoine Delalande.

<i>Sagmariasus</i> Species of crustacean

Sagmariasus verreauxi is a species of spiny lobster that lives around northern New Zealand, the Kermadec Islands the Chatham Islands and Australia from Queensland to Tasmania. It is probably the longest decapod crustacean in the world, alongside the American lobster Homarus americanus, growing to lengths of up to 60 centimetres (24 in).

<span class="mw-page-title-main">Geography of Tristan da Cunha</span>

Tristan da Cunha is an archipelago of five islands in the southern Atlantic Ocean, the largest of which is the island of Tristan da Cunha itself and the second-largest, the remote bird haven, Gough Island. It forms part of a wider territory called Saint Helena, Ascension and Tristan da Cunha which includes Saint Helena and Ascension Island.

<i>Scyllarides latus</i> Species of crustacean

Scyllarides latus, the Mediterranean slipper lobster, is a species of slipper lobster found in the Mediterranean Sea and in the eastern Atlantic Ocean. It is edible and highly regarded as food, but is now rare over much of its range due to overfishing. Adults may grow to 1 foot (30 cm) long, are camouflaged, and have no claws. They are nocturnal, emerging from caves and other shelters during the night to feed on molluscs. As well as being eaten by humans, S. latus is also preyed upon by a variety of bony fish. Its closest relative is S. herklotsii, which occurs off the Atlantic coast of West Africa; other species of Scyllarides occur in the western Atlantic Ocean and the Indo-Pacific. The larvae and young animals are largely unknown.

<i>Panulirus pascuensis</i> Species of crustacean

Panulirus pascuensis is a species of spiny lobster found around Easter Island and the Pitcairn Islands in the Pacific Ocean. It is known in English as the Easter Island spiny lobster, Langosta de Isla de Pascua in Spanish and Ura in the Rapa Nui language. This lobster is fished on a small scale for local consumption.

Jasus caveorum is a species of spiny lobster found on a single seamount in the southeastern Pacific Ocean, discovered in 1995 by fishermen from New Zealand. It is most similar to Jasus frontalis from the nearby Juan Fernández Islands, but is more closely related to species from the Atlantic and Indian Oceans.

<i>Panulirus ornatus</i> Species of crustacean

Panulirus ornatus is a large spiny lobster with 11 larval stages.

Jasus frontalis, known as the Juan Fernández rock lobster, is a species of spiny lobster in the genus Jasus, found around the Juan Fernández and Desventuradas Islands in the south-eastern Pacific Ocean.

<i>Panulirus echinatus</i> Species of crustacean

Panulirus echinatus, the brown spiny lobster, is a species of spiny lobster that lives on rocky reefs in the tropical western Atlantic Ocean and central Atlantic Islands.

<i>Panulirus penicillatus</i> Species of crustacean

Panulirus penicillatus is a species of spiny lobster that lives on shallow rocky and coral reefs in the tropical Indo-Pacific region. Common names for this spiny lobster include variegated crayfish, tufted spiny lobster, spiny lobster, Socorro spiny lobster, red lobster, pronghorn spiny lobster, golden rock lobster, double spined rock lobster and coral cray. It has a very wide range and the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".

<span class="mw-page-title-main">Vema Seamount</span> Seamount in the South Atlantic east of Cape Town

Vema Seamount is a seamount in the South Atlantic Ocean. Discovered in 1959 by a ship with the same name, it lies 1,600 kilometres (1,000 mi) from Tristan da Cunha and 1,000 kilometres (620 mi) northwest of Cape Town. The seamount has a flat top at a mean depth of 73 metres which was eroded into the seamount at a time when sea levels were lower; the shallowest point lies at 26 metres depth. The seamount was formed between 15-11 million years ago, possibly by a hotspot.

References

  1. 1 2 3 Cockcroft, A.; Butler, M.; MacDiarmid, A.; Wahle, R. (2011). "Jasus paulensis". IUCN Red List of Threatened Species . 2011: e.T169980A6698477. doi: 10.2305/IUCN.UK.2011-1.RLTS.T169980A6698477.en . Retrieved 12 November 2021.
  2. 1 2 Chan, Tin-Yam (2015). "Jasus paulensis (Heller, 1862)". WoRMS. World Register of Marine Species . Retrieved April 11, 2015.
  3. Groeneveld, Johan C.; Von der Heyden, Sophie; Mattheeb, Conrad A. (2012). "High connectivity and lack of mtDNA differentiation among two previously recognized spiny lobster species in the southern Atlantic and Indian Oceans". Marine Biology Research. 8 (8): 764–770. doi:10.1080/17451000.2012.676185. S2CID   85369368.
  4. Lipke Holthuis (1991). "Jasus lalandii (Cape rock lobster)". Marine Lobsters of the World. Food and Agriculture Organization. pp. 103–104. ISBN   92-5-103027-8. Archived from the original on 2011-07-17. Retrieved 2015-04-14.
  5. J. R. Ovenden; J. D. Booth; A. J. Smolenski (1997). "Mitochondrial DNA phylogeny of red and green rock lobsters (genus Jasus)". Marine and Freshwater Research . 48 (8): 1131–1136. doi:10.1071/MF97192.
  6. 1 2 3 4 Holthuis, L.B. "St. Paul rock lobster (Jasus paulensis)". Marine Lobsters of the World. Marine Species Identification Portal. Retrieved 12 April 2015.
  7. "St. Paul and Amsterdam Islands: A History of Two Islands". Discoverfrance.net. Archived from the original on 3 October 2007. Retrieved 12 April 2015.
  8. "Fishing zones". Sapmer. Archived from the original on 12 April 2015. Retrieved 12 April 2015.
  9. "Global Capture Production 1950-2004". Food and Agriculture Organization. Archived from the original on 2016-01-23. Retrieved 2015-04-14.