Perna perna: Difference between revisions
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| name = Brown mussel |
| name = Brown mussel |
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| image = |
| image = |
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| image_width = 250px |
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| regnum = [[Animal]]ia |
| regnum = [[Animal]]ia |
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| phylum = [[Mollusk|Mollusca]] |
| phylum = [[Mollusk|Mollusca]] |
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| ordo = [[Mytiloida]] |
| ordo = [[Mytiloida]] |
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| familia = [[Mytilidae]] |
| familia = [[Mytilidae]] |
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| genus = ''[[Perna]]'' |
| genus = ''[[Perna (bivalve)|Perna]]'' |
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| species = '''''P. perna''''' |
| species = '''''P. perna''''' |
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| binomial = ''Perna perna'' |
| binomial = ''Perna perna'' |
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The '''brown mussel''', ''Perna perna'', is an economically important [[mussel]], a [[bivalve]] [[mollusc]] |
The '''brown mussel''', ''Perna perna'', is an economically important [[mussel]], a [[bivalve]] [[mollusc]] belonging to the [[family (biology)|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]].<ref name="issg">{{cite web | url=http://www.issg.org/database/species/ecology.asp?si=742&fr=1&sts | title=Perna perna (mollusc) | publisher= Global Invasive Species Database | date = | accessdate=2007-12-15}}</ref> |
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==Description== |
==Description== |
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''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 [[resillal ridge]] is also pitted which differentiates it from other bivalves. |
''Perna perna'' is usually 90 [[millimetre|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 [[resillal ridge]] is also pitted which differentiates it from other bivalves. |
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Similar species includes 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.<ref name="gsmfc"/> The European mussel is also more resistant to human disturbance such as use for baits and consumption.<ref>{{cite journal |last=Abada-Boudjema |first=Yamina-Madiha |authorlink= |coauthors=Jean-Claude Dauvin |year=1995 |month= |title=RECRUITMENT AND LIFE SPAN OF TWO NATURAL MUSSEL POPULATIONS PERNA PERNA(LINNAEUS) AND MYTILUS GALLOPROVINCIALIS (LAMARCK) FROM THE ALGERIAN COAST |journal=Journal of Molluscan Studies |volume=61 |issue=4 |pages=467–481 |id= |url=http://mollus.oxfordjournals.org/cgi/content/abstract/61/4/467 |accessdate= 2007-12-15 |quote=|doi=10.1093/mollus/61.4.467 }}</ref> It is out-competing the brown mussel as it is more resistant to certain [[parasite]]s. The black mussel has similar shape and size although it lacks the distinguishable pitted resillal ridge. |
Similar species includes 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.<ref name="gsmfc"/> The European mussel is also more resistant to human disturbance such as use for baits and consumption.<ref>{{cite journal |last=Abada-Boudjema |first=Yamina-Madiha |authorlink= |coauthors=Jean-Claude Dauvin |year=1995 |month= |title=RECRUITMENT AND LIFE SPAN OF TWO NATURAL MUSSEL POPULATIONS PERNA PERNA(LINNAEUS) AND MYTILUS GALLOPROVINCIALIS (LAMARCK) FROM THE ALGERIAN COAST |journal=Journal of Molluscan Studies |volume=61 |issue=4 |pages=467–481 |id= |url=http://mollus.oxfordjournals.org/cgi/content/abstract/61/4/467 |accessdate= 2007-12-15 |quote=|doi=10.1093/mollus/61.4.467 }}</ref> It is out-competing the brown mussel as it is more resistant to certain [[parasite]]s. The black mussel has similar shape and size although it lacks the distinguishable pitted resillal ridge. |
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The brown mussel is native to the [[tropical]] and [[sub-tropical]] regions of the [[Atlantic Ocean]]. It is found in waters off the west coast of Africa and the coast of South America up to the [[Caribbean]]. It is accidentally introduced as an [[invasive species]] to the coast of [[Texas]] via the [[Biofouling|boat hulls]] and [[Ballast_water#Ship.27s_ballast|water ballasts]] of ships from [[Venezuela]].<ref name="gsmfc"/> |
The brown mussel is native to the [[tropical]] and [[sub-tropical]] regions of the [[Atlantic Ocean]]. It is found in waters off the west coast of Africa and the coast of South America up to the [[Caribbean]]. It is accidentally introduced as an [[invasive species]] to the coast of [[Texas]] via the [[Biofouling|boat hulls]] and [[Ballast_water#Ship.27s_ballast|water ballasts]] of ships from [[Venezuela]].<ref name="gsmfc"/> |
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| ⚫ | The brown mussel naturally colonizes rocky shores but can also attach to submerged man-made objects such as navigation buoys, petroleum platforms and shipwrecks.<ref name="issg"/> The adult brown mussel can tolerate a temperature range of 10 to 30°C and a [[salinity]] range of about 15 to 50 [[Parts-per notation|ppt]].<ref name="gsmfc"/> Its colonization of the hard strata improves that surface's marine ecology. The colonization increases surface area, encouraging other marine organisms such as [[limpet]]s, [[polychaete]]s, [[barnacle]]s, [[snail]]s and [[alga]]e to settle there as well.<ref name="issg"/> |
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The brown mussel naturally colonizes rocky shores but can also attach to submerged man-made objects such as |
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| ⚫ | navigation buoys, petroleum platforms and shipwrecks.<ref name="issg"/> The adult brown mussel can tolerate a temperature range of 10 to 30°C and a [[salinity]] range of about 15 to 50 [[Parts-per notation|ppt]].<ref name="gsmfc"/> Its colonization of the hard strata improves that surface's marine ecology. The colonization increases surface area, encouraging other marine organisms such as [[limpet]]s, [[polychaete]]s, [[barnacle]]s, [[snail]]s and [[alga]]e to settle there as well.<ref name="issg"/> |
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==Ecology and life history== |
==Ecology and life history== |
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Revision as of 21:34, 5 August 2008
| Brown mussel | |
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| Species: | P. perna
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| Binomial name | |
| Perna perna Linnaeus, 1758
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| Synonyms | |
The brown mussel, Perna perna, 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]
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 resillal ridge is also pitted which differentiates it from other bivalves.
Similar species includes 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]
Habitat and distribution
The brown mussel is native to the tropical and sub-tropical regions of the Atlantic Ocean. It is found in waters off the west coast of Africa and the coast of South America up to the Caribbean. 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]
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
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 parthenopeun, Chicoreus brevifrons, Thais haemastoma, and Menippe nodifroms.[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]
References
- ^ a b c d "Perna perna (mollusc)". Global Invasive Species Database. Retrieved 2007-12-15.
- ^ a b c d e f "Perna perna (Linnaeus, 1758)". Gulf States Marine Fisheries Commission. Retrieved 2007-12-15.
- ^ Abada-Boudjema, Yamina-Madiha (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. Retrieved 2007-12-15.
{{cite journal}}: Cite has empty unknown parameter:|month=(help); Unknown parameter|coauthors=ignored (|author=suggested) (help) - ^ Holland, Brenden (1997). "Genetic aspects of a marine invasion". Quarterdeck. 5 (3). Retrieved 2007-12-15.
{{cite journal}}: Cite has empty unknown parameter:|coauthors=(help); Unknown parameter|month=ignored (help)