Property:Definition
From Coastal Wiki
This is a property of type Text. It links to pages that use the form MstConcept.
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1) The measurement from the most anterior tip of the body to the midlateral posterior edge of the hypural plate (in fish with a hypural plate) or to the posterior end of the vertebral column (in fish lacking hypural plates). It may be restricted to the tip of the snout if the lower jaw projects. The base of the caudal fin (end of the vertebral column or posterior edge of the hypural plate) is determined by flexing the tail up while the caudal peduncle is held down. The resultant wrinkle or caudal flexure indicates the caudal base. It may also be determined by probing or dissection. Sometimes the posteriormost point is the last scale, the last pored scale or the beginning of the caudal fin rays. It is the usual scientific measurement for length of a fish except in Myxini, Petromyzontiformes, Elasmobranchii and Holocephali. This measurement is used because long-preserved fish often lose the tips of the caudal fin rays through breakage after the desiccation effect of alcohol. See total length and fork length. In Holocephali the length is usually taken from the tip of the snout to the origin of the upper caudal fin because the caudal filament breaks off frequently. In Scaridae it is taken back to the rear margin of the second to last lateral line scale, because the large scales obscure the point of caudal flexure. In small dead fish, the end point is detected by bending the caudal fin to one side. In fishery work, as a result of the use of the measuring board, standard-, fork- and total length are taken from the most anterior part of the head. Abbreviated as SL. (FishBase)
2) Standard length (SL) refers to the length of a fish measured from the tip of the snout to the posterior end of the last vertebra or to the posterior end of the midlateral portion of the hypural plate. Simply put, this measurement excludes the length of the caudal fin. (Wikipedia)
Standard length measurements are used with Teleostei (most bony fish), while total length measurements are used with Myxini (hagfish), Petromyzontiformes (lampreys), and (usually) Elasmobranchii (sharks and rays), as well as some other fishes. (Wikipedia)
3) Standard length (SL) can be specified as: a) Maximum length: Size (in cm) of the largest male/unsexed or female specimen ever caught. (FishBase); b) Common length: Size (in cm) at which male/unsexed or female specimen(s) are commonly caught or marketed. (FishBase).
Tentacles used to collect particluate food (e.g. polychaete deposit feeders) +
Channels between the mainland and an island or between two islands which are open at both ends to the open coast (it does not refer to similar features or narrows within marine inlets). +
A line on the shore composing debris deposited by a receding tide; commonly used to denote the line of debris at the level of extreme high water (Lincoln ''et al.'', 1998). +
An organism that uses pulses of electricity or sound to stun prey (e.g. pistol shrimp) +
1) The zone exposed to air only at its upper limit by the lowest spring tides, although almost continuous wave action on extremely exposed coasts may extend the upper limit high into the intertidal region. The sublittoral extends from the upper limit of the large kelps and includes, for practical purposes in nearshore areas, all depths below the littoral. Various sub-zones are recognized (based on Hiscock, 1985). 2) The marine zone extending from the lowest limit of the intertidal to the outer edge of the continental slope (rephrased from Lincoln ''et al.'', 1998). +
The upper part of the sublittoral zone which is uncovered by the tide. On hard substrata, the zone is characterized by the kelps ''Laminaria digitata'' and ''Alaria esculenta''. The lower limit of this zone is marked by the upper limit of the truly sublittoral kelp ''Laminaria hyperborea'' (based on Lewis, 1964; Hiscock, 1996). +
An organism that provide substratum for specific other organisms, rarely found on other organisms, a ubiquitous relationship. +
Description of the substratum on or in which an organism is found or recorded. +
An organism that feeds on fragmented particulate organic matter within the substratum (e.g. ''Echinocardium cordatum'') (adapted from Lincoln ''et al.'', 1998). +
Appendages that bear suckers on muscular arms to hold and subdue prey (e.g cephalopods) +
An organism that provides 'support' for other organisms, either as a host for a symbiote or parasite, or as substratum for epibiota. +
Hard framework, internal or external, which supports and protects softer parts of plant, animal or unicellular organism, and to which muscles usually attach in animals, includes skeletons (derived from Lawrence, 2005). +
1) The lower terrestrial zone, characteristically dominated by orange and white-to-grey lichens on hard substrata with scattered salt-tolerant higher plants and mosses (Hiscock, 1996). 2) The region of the shore directly above the highest water level and subject to wetting by spray or wave splash (Lincoln ''et al.'', 1998). +
An organism that feeds on fragmented particulate organic matter on the surface of the substratum (e.g. ''Corophium volutator'') (adapted from Lincoln ''et al.'', 1998). +
