Association with vessel vectors

Actual evidence of being found in samples in a particular vector from any world region.

Anchor and anchor chains. Organisms found on anchors, anchor chain or within attached sediments, including anchor chain lockers.

Ballast water. Ballast water means water with its suspended matter taken on board a ship to control trim, list, draught, stability or stresses of the ship.

Biofouling. Biofouling means the accumulation of aquatic organisms such as micro-organisms, plants, and animals on surfaces and structures immersed in or exposed to the aquatic environment. Biofouling can include microfouling and macrofouling.

  • Macrofouling means large, distinct multicellular organisms visible to the human eye such as barnacles, tubeworms, or fronds of algae.
  • Microfouling means microscopic organisms including bacteria and diatoms and the slimy substances that they produce.
Biofouling comprised of only microfouling is commonly referred to as a slime layer.

Sea chest. The sea chests are cavities (an opening with protection grid) at the bottom side of the ships’ hull (an opening for pumping in and out water for, e.g., ballasting, firefighting) where aquatic organisms may settle and be transported.

Tank sediments. Matter settled out of ballast water within a ship.

Bioaccumulation association

Natural toxins. An organism that accumulates toxins naturally produced by other organisms, such as phytotoxins, in its tissues.

Anthropogenic chemical compounds. An organism that accumulates human-produced chemicals, such as pharmaceuticals, heavy metals, pesticides, dioxins, in its tissues.

Characteristic feeding method

Chemoautotroph. An organism that obtains metabolic energy by oxidation of inorganic substrates such as sulphur, nitrogen or iron.

Deposit feeder – Subsurface. Synonym: detritivore. An organism feeding on fragmented particulate organic matter in the substratum.

Deposit feeder – Surface. Synonym: detritivore. An organism feeding on fragmented particulate organic matter from the surface of the substratum.

Grazer. An organism feeding on plants (higher aquatic plants, benthic algae and phytoplankton) and/or sessile animals organisms.

Herbivore. An organism feeding on plants (higher aquatic plants, benthic algae and phytoplankton).

Mixotroph. An organism both autotrophic and heterotrophic.

Omnivore. An organism feeding on mixed diet of plant and animal material.

Parasite. Feeding on the tissues, blood or other substances of a host.

Photoautotroph. An organism that obtains metabolic energy from light by photosynthesis (e.g. seaweeds, phytoplankton).

Planktotroph. An organism feeding on plankton.

Predator. An organism that feeds by preying on other organisms, killing them for food.

Scavenger. An organism feeding on dead and decaying organic material.

Suspension feeder – Active. An organism feeding on particulate organic matter, including plankton, suspended in the water column, collecting it actively by sweeping or pumping (creating feeding currents).

Suspension feeder – Passive. An organism feeding on particulate organic matter, including plankton, suspended in the water column, utilizing the natural flow to bring particles in contact with feeding structures.

Symbiont contribution. Where some dietary component(s) are provided by symbiotic organisms (e.g. Anemonia with zooxanthellae).

Developmental trait

Brooding. The incubation of eggs either inside or outside the body. Eggs may be brooded to a variety of developmental stages. Males or females may be responsible for brooding.

Direct development. A life cycle lacking a larval stage.

Spawning. The release of gametes into the water.

Lecithotrophy. Development at the expense of internal resources (i.e. yolk) provided by the female.

Parental care. Any form of parental behaviour that is likely to increase the fitness of offspring.

Planktotrophy. Feeding on plankton.

Resting stages. The quiescent stage in the life cycle (dormancy, diapause).

Viviparous. Producing live offspring from within parental body.

Habitat modifying ability potential

Autogenic ecosystem engineers. Organisms which change the environment via their own physical structures (i.e. their living and dead tissues) such as corals, oysters, kelps, sea grasses, etc.

Allogenic ecosystem engineers. Organisms which modify the environment by causing physical state changes in biotic and abiotic materials that, directly or indirectly, modulate the availability of resources to other species (e.g. excavating deep burrows which other organisms co-occupy, damming the water flow, etc).

Keystone species. A keystone species is crucial in maintaining the organization and diversity of its ecological community, by determining the types and numbers of other species.

Life form

Neuston. Organisms that live on (epineuston) or under (hyponeuston) the surface film of water bodies.

Zoobenthos. Animals living on or in the seabed.

Phytobenthos. Algae and higher plants living on or in the seabed.

Zooplankton. Animals living in the water column, unable to maintain their position independent of water movements.

Phytoplankton. Microscopic plankton algae and cyanobacteria.

Benthopelagos. Synonyms: hyperbenthic, benthopelagic, nektobenthic, demersal. An organism living at, in or near the bottom of the sea, but having the ability to swim.

Nekton. Actively swimming aquatic organisms able to move independently of water currents.

Parasite. An organism intimately associated with and metabolically dependent on another living organism (host) for completion of its life cycle.

Symbiont (nonparasitic). An organism living mutually with another species without harming it. Association of two species (symbionts) may be mutually beneficial.

Mobility

Boring. An organism capable of penetrating a solid substrate by mechanical scraping or chemical dissolution.

Burrowing. An organism capable of digging in sediment.

Crawling. An organism moving slowly along on the substrate.

Drifting. An organism whose movement is dependent on wind or water currents.

Permanent attachment. Non-motile; permanently attached at the base. Also includes permanent attachment to a host.

Swimming. An organism capable of moving through the water by means of fins, limbs or appendages.

Temporary attachment. Temporary / sporadic attachment. Attached to a substratum but capable of movement across (or through) it (e.g. Actinia). Also includes temporary attachment to a host.

Native origin

The region the species originates from.

References



References should follow the standard of Biological invasions:


Journal article
Gamelin FX, Baquet G, Berthoin S, Thevenet D, Nourry C, Nottin S, Bosquet L (2009) Effect of high intensity intermittent training on heart rate variability in prepubescent children. Eur J Appl Physiol 105:731-738. doi: 10.1007/s00421-008-0955-8
Ideally, the names of all authors should be provided, but the usage of “et al” in long author lists will also be accepted:
Smith J, Jones M Jr, Houghton L et al (1999) Future of health insurance. N Engl J Med 965:325–329


Article by DOI


Slifka MK, Whitton JL (2000) Clinical implications of dysregulated cytokine production. J Mol Med. doi:10.1007/s001090000086


Book
South J, Blass B (2001) The future of modern genomics. Blackwell, London


Book chapter
Brown B, Aaron M (2001) The politics of nature. In: Smith J (ed) The rise of modern genomics, 3rd edn. Wiley, New York, pp 230-257


Online document
Cartwright J (2007) Big stars have weather too. IOP Publishing PhysicsWeb. http://physicsweb.org/articles/news/11/6/16/1. Accessed 26 June 2007


Dissertation
Trent JW (1975) Experimental acute renal failure. Dissertation, University of California

Reproductive frequency

Iteroparous. Organisms breeding more than once in their lifetime.

Semelparous. Organisms breeding once in their lifetime.

Reproductive type

Asexual. Budding, Fission, Fragmentaion, including parthenogenesis. A form of asexual multiplication in which:
a) a new individual begins life as an outgrowth from the body of the parent. It may then separate to lead an independent existence or remain connected or otherwise associated to form a colonial organism;
b) the ovum develops into a new individual without fertilization;
c) division of the body into two or more parts each or all of which can grow into new individuals is involved.

Self-fertilization. Selfing or autogamy. The union of a male and female gamete produced by the same individual.

Sexual. Permanent hermaphrodite, Protandrous hermaphrodite, Protogynous hermaphrodite, Gonochoristic.
Capable of producing both ova and spermatozoa either at the same time. A condition of hermaphroditism in plants and animals where male gametes mature and are shed before female gametes mature or vice versa.
Having separate sexes.

Salinity

The exact salinity range if known (psu), else salinity zone(s) according to the Venice system:
1. Limnetic [<0.5psu]
2. β-Oligohaline [0.5-3psu]
3. α-Oligohaline [3-5psu]
4. β-Mesohaline [5-10psu]
5. α-Mesohaline [10-18psu]
6. Polymixohaline [18-30psu]
7. Euhaline [30-40psu]
8. Hypersaline [>40psu]

Sociability

Colonial. Descriptive of organisms produced asexually which remain associated with each other; in many animals, retaining tissue contact with other polyps or zooids as a result of incomplete budding.

Gregarious. Organisms living in groups or communities, growing in clusters.

Solitary. Living alone, not gregarious.

Sub-species level

A geographical subset of a species showing discrete differences in morphology, coloration or other features when compared with other members of the species. Subspecies may also differ in their habitat or behavior, but they can interbreed. Often the lowest taxonomic level within a classification system.

Synonym

Valid synonyms of a species (not all of them).

Toxicity

Poisonous. An organism capable of producing poison that gains entry to another organism body via the gastrointestinal tract, the respiratory tract, or via absorption through intact body layers.

Venomous. An organism capable of producing poison, usually injected through another organism intact skin by bite or sting.

Not relevant. Neither poisonous nor venomous.

Public domain: Species account

Species Mercenaria mercenaria [WoRMS]
Authority (Linnaeus, 1758)
Family Veneridae  
Order Venerida  
Class Bivalvia  
Phylum Mollusca  
Synonym (?) Mercenaria cancellata (Gabb, 1860)
Mercenaria fulgurans (Tryon, 1865)
Mercenaria rutila (Sternheimer, 1957)
Mercenaria rutila rarilineata (Sternheimer, 1957)
Venus mercenaria (Linnaeus, 1758)
Sub-species level (?) Not entered
Native origin (?) Ocean: Atlantic
--> Ocean region: NW Atlantic

References (not structured):
Brown A, Heilmayer O, Thatje S (2010) Metabolic rate and growth in the temperate bivalve Mercenaria mercenaria at a biogeographical limit, from the English Channel. Journal of the Marine Biological Association of the United Kingdom, 90(5), 1019–1023

Comments:
North-west Atlantic, North America, from Prince Edward Island.
Life form / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
Neuston
ZoobenthosXX
Phytobenthos
ZooplanktonXX
Phytoplankton
Benthopelagos
Nekton
Ectoparasite
Endoparasite
Symbiont (non parasitic)


References (not structured):
Brown A, Heilmayer O, Thatje S (2010) Metabolic rate and growth in the temperate bivalve Mercenaria mercenaria at a biogeographical limit, from the English Channel. Journal of the Marine Biological Association of the United Kingdom, 90(5), 1019–1023
Huiping Yang, Ximing Guo (2006) Tetraploid Induction by Inhibiting Mitosis I with Heat Shock, Cold Shock, and Nocodazole in the Hard Clam Mercenaria mercenaria (Linnaeus, 1758) Biotechnol (NY) 8(5):501-10
Sociability / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
SolitaryX
GregariousXX
Colonial


References (not structured):
Carter M.,2005. Mercenaria mercenaria. Hard-shell clam. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 07/06/2012]. Available from:
Reproductive frequency (?) Iteroparous

References (not structured):
Huiping Yang, Ximing Guo (2006) Tetraploid Induction by Inhibiting Mitosis I with Heat Shock, Cold Shock, and Nocodazole in the Hard Clam Mercenaria mercenaria (Linnaeus, 1758) Biotechnol (NY) 8(5):501-10
Hoffman EE, Klinck JM, Kraeuter JN, Powell EN, Grizzle RE, Buckner SC, Bricelj VM (2006) A population dynamics model of the hard clam, Mercenaria mercenaria: development of the age- and length-frequency structure of the population. Journal of Shellfish Research. pg(s) 417-444
Reproductive type (?) Sexual

References:
Huiping Yang, Ximing Guo (2006) Tetraploid Induction by Inhibiting Mitosis I with Heat Shock, Cold Shock, and Nocodazole in the Hard Clam Mercenaria mercenaria (Linnaeus, 1758) Biotechnol (NY) 8(5):501-10

Judge LM, Coen DL, Heck LK (1993) Does Mercenaria mercenaria encounter elevated food levels in seagrass beds? Results from a novel technique to collect suspended food resources. MARINE ECOLOGY PROGRESS SERIES Vol. 92: 141-150

Whetstone JM, Sturmer NL, Oesterling MJ (2005) Biology and Culture of the Hard Clam (Mercenaria mercenaria). Southern Regional Aquaculture Center. SRAC Publication No. 433

Comments:
Mercenaria mercenaria is a protandric hermaphrodite, with the male line developing first. Approximately 98% of all juvenile clams begin life as males; however, with increased age and size, sex ratios in the population even out, and approximately half of the males later change to females.
Developmental trait (?) Planktotrophy
Spawning

References:
Carriker, M.R. 2001. Embryogenesis and organogenesis of veligers and early juveniles. In J.N. Kraeuter & M. Castagna (eds.), Biology of the hard clam. pp 77-112. Elsevier, New York, USA.

Comments:
Eggs of M. mercenaria measure approximately 70 - 90 um in diameter and are surrounded by a gelatinous envelope. Fertilized eggs become trochophore larvae within the first 12 hours; shells develop within 26-30 hours. The veliger stage is reached in another 8-12 hours. Veligers are planktonic for approximately 12-14 days before settling. Larvae that are competent to settle measure approximately 200-210 um. With settlement, the velum disappears and use of the foot shifts from aiding in swimming to burrowing and crawling.
Characteristic feeding method / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
Photoautotroph
Mixotroph
Suspension feeder – ActiveXX
Suspension feeder – Passive
Deposit feeder – Surface
Deposit feeder – Sub-surface
Omnivore
Herbivore
Scavenger
Symbiont contribution
PlanktotrophX
Chemoautotroph
Predator
Grazer


References (not structured):
Alatalo P (1980) Yeast utilization in oysters and clams. Masters thesis, Univ. Del., Newark, DE 19716, 44 p.

Carriker, M.R. 2001. Embryogenesis and organogenesis of veligers and early juveniles. In J.N. Kraeuter & M. Castagna (eds.), Biology of the hard clam. pp 77-112. Elsevier, New York, USA.

Whetstone JM, Sturmer NL, Oesterling MJ (2005) Biology and Culture of the Hard Clam (Mercenaria mercenaria). Southern Regional Aquaculture Center. SRAC Publication No. 433

Comments:
Hard clams filter the water to obtain phytoplankton and other suspended particles that they use as food.
Juvenile clams, Mercenaria mercenaria were fed one of three diets consisting of the flagellate Isochrysis galbana, the torulan yeast Candida utilis.
The free swimming larvae feed on phytoplankton and other organic materials in the water.
Mobility / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
Swimmer
Crawler
BurrowerXX
DrifterXX
Temporary attachment
Permanent attachment
Borer


References (not structured):
Carter M.,2005. Mercenaria mercenaria. Hard-shell clam. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 07/06/2012]. Available from:

Comments:
The hard clam, Mercenaria mercenaria, burrows shallowly in sediments of either mud or sand.
Salinity tolerance range (?) Exact range: 21 - 30

References:
Eversole, A.G. 1987. Species profiles: life histories and environmental requirements of coastal fishes and invertebrates (South Atlantic)--hard clam. U.S. Fish Wildl. Serv. Biol. Rep. 82(11.75). U.S. Army Corps of Engineers, TR EL-82-4. 33 pp.

Comments:
the tolerance of M.mercenaria to decreases in salinity increases with the age of the clam, and its inversely proportional to temperature. Eggs develop normally within the range of 20-32,5 ppt; over 35 ppt, only 1% of eggs develop, at salinity below 17,5 ppt none do. Maximum growth of larvae os achieved at salinities between 21-30 ppt. Adult Mercenaria mercenaria are able to withstand long periods of low salinity due primarily to their valves. Adults survive at salinity as low as 10 ppt for up to 4-5 weeks, and are able to balance their internal osmotic conditions with that of the external medium.
Habitat modifying ability potential (?) OLD VALUE

Comments:
--/OLD VALUE/--
Perennial habitat former
Toxicity / Life stage (?) Not relevant
Bioaccumulation association (?) Anthropogenic chemical compounds

References:
Larsen, P. F. 1979. The distribution of heavy metals in the hard clam, Mercenaria mercenaria, in the lower Chesapeake Bay region. Estuaries, 2, pp. 1-8.
Known human health impact? Known

References:
Hadley, N., Coen L. 2015. Hard clams. Supplemental Volume: Species of Conservation Concern. Available at: (https://dc.statelibrary.sc.gov/server/api/core/bitstreams/bfebd132-b921-42f9-9f66-1a2e19eb7584/content)

Comments:
A large adult clam filters an average of seven to eight liters per hour. They also readily ingest bacteria, viruses and other water-borne pathogens that can cause human health problems.
Known economic impact? Known

References:
Hadley, N., Coen L. 2015. Hard clams. Supplemental Volume: Species of Conservation Concern. Available at: (https://dc.statelibrary.sc.gov/server/api/core/bitstreams/bfebd132-b921-42f9-9f66-1a2e19eb7584/content)

Comments:
Hard clams are harvested both recreationally and commercially and are the most valuable
commercially harvested clam in the United States. In South Carolina, the hard clam also supports a mariculture industry producing an estimated ‘farmgate’ value of 6.5 million dollars.
Known measurable environmental impact? Known

References:
Smithsonian Environmental Research Center. (n.d.). Nemesis species summary: Mercenaria mercenaria. Retrieved from https:https://invasions.si.edu/nemesis/species_summary/-57

Comments:
M. mercenaria to small, confined estuaries has probably limited its impact. However, dense populations of these clams could have substantial impacts by filtering phytoplankton and excreting nutrients, as was seen in the Colorado Lagoon, California.In the Gulf of Mexico, widespread plantings and aquaculture of M. mercenaria has resulted in hybridization with the native M. campechiensis. In five estuaries on the Gulf Coast of Florida, near early planting and present aquaculture sites, hybrids comprised 13-45% of the Mercenaria sampled.
Included in the Target Species list? No

References:
HELCOM, 2009. Alien Species and Ballast Water [PDF]. Available at: (https://archive.iwlearn.net/helcom.fi/stc/files/shipping/Table_2_Alienspecies_%20lists_2009.pdf)
Association with vessel vectors (?) Unknown

Comments:
Not available.
Molecular information Available

NCBI (http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=6596&lvl=0)
Last update bySandra Gečaitė, 2024-07-16