Perna perna

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Brown mussel
Perna perna 002.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Mytilida
Family: Mytilidae
Genus: Perna
Species:
P. perna
Binomial name
Perna perna
Synonyms
  • Chloromya perna
  • Melina perna(Linnaeus, 1758)
  • Mya perna Linnaeus, 1758
  • Mytilus achatinusLamarck, 1819
  • Mytilus aferGmelin, 1791
  • Mytilus africanusChemnitz, 1785
  • Mytilus elongatusFischer von Waldheim, 1807
  • Mytilus elongatusChemnitz in Schröter, 1788 (unavailable name)
  • Mytilus irisansJousseaume, 1888
  • Mytilus magellanicusRöding, 1798
  • Mytilus perna(Linnaeus, 1758)
  • Mytilus pictusBorn, 1778
  • Mytilus variegatusRöding, 1798
  • Mytilus venezolanusAndreu, 1965
  • Mytilus versicolorGmelin, 1791
  • Perna africana(Chemnitz, 1785) (not available)
  • Perna africana var. mauretanicaPallary, 1900
  • Perna africana var. tingitanaPallary, 1900
  • Perna indicaKuriakose & Nair, 1976
  • Perna magellanicaPhilipsson, 1788
  • Perna perna f. picta(Born, 1778)
  • Perna picta(Born, 1778)

Perna perna, the brown mussel, is an economically important mussel, a bivalve mollusc belonging to the family Mytilidae. It is harvested as a food source but is also known to harbor toxins and cause damage to marine structures. It is native to the waters of Africa, Europe, and South America and was introduced in the waters of North America. [1]

Contents

Description

Perna perna is usually 90 mm long although it can reach sizes of up to 120 mm. The mussel is easily recognized by its brown color but its identifying characteristic is the "divided posterior retractor mussel scar". Its pitted resillal ridge also differentiates the mussel from other bivalves.

Similar species include the European mussel, Mytilus galloprovincialis , and the black mussel, Choromytilus meridionalis . The European mussel is similar in shape and color to the brown mussel and shares its native habitat on the south-western coast of Africa. [2] The European mussel is also more resistant to human disturbance such as use for baits and consumption. [3] It is out-competing the brown mussel as it is more resistant to certain parasites. The black mussel has similar shape and size although it lacks the distinguishable pitted resillal ridge. [2]

The brown mussel can also be mistaken for the more famous greenish-brown species Perna viridis , as their color and shell shape can change depending on environmental conditions. [4]

Right and left valve of the same specimen:


Perna perna var. elongata
Right and left valve of the same specimen:

Habitat and distribution

The brown mussel is native to the tropical and sub-tropical regions of the Atlantic Ocean and Western Indian Ocean . It is found in waters off the west coast of Africa and the coast of South America up to the Caribbean, as well in the East Coast of Africa and Madagascar. It is accidentally introduced as an invasive species to the coast of Texas via the boat hulls and water ballasts of ships from Venezuela. [2] Its distribution include: Chile, Peru, South Africa.

The brown mussel naturally colonizes rocky shores but can also attach to submerged man-made objects such as navigation buoys, petroleum platforms and shipwrecks. [1] The adult brown mussel can tolerate a temperature range of 10 to 30 °C and a salinity range of about 15 to 50 ppt. [2] Its colonization of the hard strata improves that surface's marine ecology. The colonization increases surface area, encouraging other marine organisms such as limpets, polychaetes, barnacles, snails and algae to settle there as well. [1]

Ecology and life history

Colony of Brown Mussels silted up in South Africa Colony of Brown Mussels silted up, South Africa.jpg
Colony of Brown Mussels silted up in South Africa

The mussel utilizes external fertilization during the spawning season between May and October although this is also reported to occur in December. The two sexes release eggs and sperm to the water during spawning to produce veliger larvae. Fifteen hours after fertilization the larvae have well-developed hinge teeth. Ten to twelve days after fertilization the larvae undergo metamorphosis where byssal threads are secreted. The larvae then settle on rocky surfaces.

The brown mussel is a filter feeder and feeds on phytoplankton, zooplankton and suspended organic materials. It is plagued by the parasite Proctoeces maculatus and an unidentified bucephalid sporocyst which castrates both sexes. On the African coastline it is preyed upon by the whelk Nucella cingulata , lobsters, octopuses, gulls and the African black oystercatcher. On the South American coastline, it provides food for Callinectes danae , Cymatium parthenopeum , Chicoreus brevifrons , Thais haemastoma , and Menippe nodifrons . [2]

Importance to humans

Perna perna is harvested as a food source in Africa and South America. The bivalve is considered for cultivation as it can grow quickly to the commercial size of 60 to 80 mm in just 6 or 7 months. It is also well-suited to tropical and subtropical regions. However, the mussel can harbor saxitoxin from consumed dinoflagellates. Its consumption has caused outbreaks of paralytic shellfish poisoning in Venezuela. [2]

The brown mussel is known to aggregate in such large amounts that it is able to sink navigational buoys. It also coexists with the Asian green mussel in fouling water pipes and marine equipment. It is less resistant to chlorination than Perna viridis and thus easier to control. However, it is recommended that the concentration of chlorine used for chlorination be above the tolerance level of Perna viridis, the tougher of the two biofouling mussels. [1]

Related Research Articles

<span class="mw-page-title-main">Mussel</span> Type of bivalve mollusc

Mussel is the common name used for members of several families of bivalve molluscs, from saltwater and freshwater habitats. These groups have in common a shell whose outline is elongated and asymmetrical compared with other edible clams, which are often more or less rounded or oval.

<span class="mw-page-title-main">Bivalvia</span> Class of molluscs

Bivalvia, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bivalves have no head and they lack some usual molluscan organs, like the radula and the odontophore. The class includes the clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater. The majority are filter feeders. The gills have evolved into ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other hard surfaces. Some bivalves, such as the scallops and file shells, can swim. The shipworms bore into wood, clay, or stone and live inside these substances.

<span class="mw-page-title-main">Blue mussel</span> Species of mollusc

The blue mussel, also known as the common mussel, is a medium-sized edible marine bivalve mollusc in the family Mytilidae, the mussels. Blue mussels are subject to commercial use and intensive aquaculture. A species with a large range, empty shells are commonly found on beaches around the world.

<i>Rapana venosa</i> Species of gastropod

Rapana venosa, common name the veined rapa whelk or Asian rapa whelk, is a species of large predatory sea snail, a marine gastropod mollusc or whelk, in the family Muricidae, the rock shells.

<i>Atrina fragilis</i> Species of bivalve

Atrina fragilis, the fan mussel, is a species of large saltwater clam, a marine bivalve mollusc in the family Pinnidae, the pen shells.

<i>Perna viridis</i> Species of bivalve

Perna viridis, known as the Asian green mussel, is an economically important mussel, a bivalve belonging to the family Mytilidae. It is harvested for food but is also known to harbor toxins and cause damage to submerged structures such as drainage pipes. It is native in the Asia-Pacific region but has been introduced in the Caribbean, and in the waters around Japan, North America, and South America.

<span class="mw-page-title-main">Chilean mussel</span> Species of bivalve

The Chilean mussel or Chilean blue mussel is a species of blue mussel native to the coasts of Chile from BioBio region to Cape Horn. Today genomic evidence confirmed that the native Chilean blue mussel is genetically distinct from the Northem Hemisfere M. edulis, M. galloprovincialis and M. trossulus and also genetically different from Mytilus platensis", the another species of smooth shelled mussel from Southamerica.

<i>Mytilus</i> (bivalve) Genus of bivalves

Mytilus is a cosmopolitan genus of medium to large-sized edible, mainly saltwater mussels, marine bivalve molluscs in the family Mytilidae.

<i>Ostrea lurida</i> Species of bivalve

Ostrea lurida, common name the Olympia oyster, after Olympia, Washington in the Puget Sound area, is a species of edible oyster, a marine bivalve mollusk in the family Ostreidae. This species occurs on the northern Pacific coast of North America. Over the years the role of this edible species of oyster has been partly displaced by the cultivation of non-native edible oyster species.

<i>Mytilus trossulus</i> Species of bivalve

Mytilus trossulus, the bay mussel or foolish mussel, is a medium-sized edible marine bivalve mollusc in the family Mytilidae.

<i>Choromytilus meridionalis</i> Species of bivalve

Choromytilus meridionalis, the black mussel, is a species of bivalve. It is a marine mollusc in the family Mytilidae.

<span class="mw-page-title-main">Mediterranean mussel</span> Species of bivalve

The Mediterranean mussel is a species of bivalve, a marine mollusc in the family Mytilidae. It is an invasive species in many parts of the world, and also an object of aquaculture.

<i>Perna</i> (bivalve) Genus of bivalves

Perna is a genus of mussels, marine bivalve molluscs in the family Mytilidae.

<i>Trichomya</i> Genus of bivalves

Trichomya is a monotypic genus of marine bivalve molluscs in the family Mytilidae, the mussels. The only species is Trichomya hirsuta which is endemic to southern and eastern Australia. Its common names include the hairy mussel, the greenling and the kelp greenling.

<i>Mytilus unguiculatus</i> Species of bivalve

Mytilus unguiculatus, common name the Korean mussel or the hard-shelled mussel, is a species of mussel, a marine bivalve mollusc in the family Mytilidae. This species is heavily exploited as a food item via mariculture in Korea and in China. It is also a typical macrofouling organism.

Potamocorbula amurensis is a species of small saltwater clam, a marine bivalve mollusc in the order Myida. Common names include the overbite clam, the Asian clam, the Amur River clam and the brackish-water corbula. The species is native to marine and brackish waters in the northern Pacific Ocean, its range extending from Siberia to China, Korea and Japan. It has become naturalised in San Francisco Bay.

<i>Modiolus barbatus</i> Species of bivalve

Modiolus barbatus, the bearded horse mussel, is a species of "horse mussel", a marine bivalve mollusc in the family Mytilidae, the mussels.

<i>Mytella charruana</i> Species of bivalve

Mytella charruana is a bivalve, commonly known as the Charru mussel. This species was discovered in Central and South America and by Alcide d'Orbigny, A French naturalist in 1842. They are less than an inch long (2.5 cm), and range from brown to black in color.

References

  1. 1 2 3 4 "Perna perna (mollusc)". Global Invasive Species Database. Retrieved 2007-12-15.
  2. 1 2 3 4 5 6 "Perna perna (Linnaeus, 1758)". Gulf States Marine Fisheries Commission. Archived from the original on 2006-08-13. Retrieved 2007-12-15.
  3. Abada-Boudjema, Yamina-Madiha; Jean-Claude Dauvin (1995). "Recruitment and Life Span of Two Natural Mussel Populations Perna Perna(Linnaeus) and Mytilus Galloprovincialis (Lamarck) from the Algerian Coast". Journal of Molluscan Studies. 61 (4): 467–481. doi:10.1093/mollus/61.4.467.
  4. Holland, Brenden (December 1997). "Genetic aspects of a marine invasion". Quarterdeck. 5 (3). Archived from the original on 2014-08-11. Retrieved 2007-12-15.