Difference between revisions of "Traits:TotalLength"
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{{Concept | {{Concept | ||
|label=Total length (TL) | |label=Total length (TL) | ||
| − | |definition=Total length (TL) refers to the length of a fish measured from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body. (Wikipedia) | + | |definition=1) The greatest length of the whole body between the most anterior point of the body and the most posterior point, in a straight line, not over the curve of the body. Sometimes, when there are two equal lobes, the caudal rays are squeezed together and their tip is taken as the most posterior point (excluding the caudal filaments), or the longest lobe is squeezed to the midline (maximum length or extreme tip length). Also an imaginary line may be drawn between the two lobe tips and length to its mid-point taken as the most posterior point (total auxiliary length or bilobular length). Usually the tip of the most posterior lobe of the fin in normal position is taken as the posteriormost point (total normal length or natural tip length). Total length is used by taxonomists in Myxini, Petromyzontiformes, usually in Elasmobranchii and sometimes in other fishes. Standard length is usually employed with Teleostei. Abbreviated TL. (FishBase) |
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| + | 2) Total length (TL) refers to the length of a fish measured from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body. (Wikipedia) | ||
Total length measurements are used in slot limit and minimum landing size regulations. (Wikipedia) | Total length measurements are used in slot limit and minimum landing size regulations. (Wikipedia) | ||
| − | + | 3) Total length (TL) can be specified as:<ul><li>Maximum length: Size (in cm) of the largest male/unsexed or female specimen ever caught. (FishBase)<li>Common length: Size (in cm) at which male/unsexed or female specimen(s) are commonly caught or marketed. (FishBase)</ul> | |
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{{Conceptshowvalues}} | {{Conceptshowvalues}} | ||
{{freetext}} | {{freetext}} | ||
| + | {{reference | ||
| + | |reference=https://en.wikipedia.org/wiki/Fish_measurement | ||
| + | }} | ||
| + | {{reference | ||
| + | |reference=http://www.fishbase.org/Glossary/Glossary.php?q=total+length&sc=is | ||
| + | }} | ||
{{Concept relation | {{Concept relation | ||
|relation=collection | |relation=collection | ||
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{{Concept relation | {{Concept relation | ||
|relation=is trait of | |relation=is trait of | ||
| − | |internal page=Traits: | + | |internal page=Traits:TaxonSpecificBodySizeFish |
}} | }} | ||
{{Missingproperty}} | {{Missingproperty}} | ||
Latest revision as of 12:35, 7 June 2016
Warning: This page is no longer updated. More recent information can be found at https://marinespecies.org/traits/aphia.php?p=attrdefinitions
Total length (TL)
Total length (TL): 1) The greatest length of the whole body between the most anterior point of the body and the most posterior point, in a straight line, not over the curve of the body. Sometimes, when there are two equal lobes, the caudal rays are squeezed together and their tip is taken as the most posterior point (excluding the caudal filaments), or the longest lobe is squeezed to the midline (maximum length or extreme tip length). Also an imaginary line may be drawn between the two lobe tips and length to its mid-point taken as the most posterior point (total auxiliary length or bilobular length). Usually the tip of the most posterior lobe of the fin in normal position is taken as the posteriormost point (total normal length or natural tip length). Total length is used by taxonomists in Myxini, Petromyzontiformes, usually in Elasmobranchii and sometimes in other fishes. Standard length is usually employed with Teleostei. Abbreviated TL. (FishBase)
2) Total length (TL) refers to the length of a fish measured from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body. (Wikipedia)
Total length measurements are used in slot limit and minimum landing size regulations. (Wikipedia)
3) Total length (TL) can be specified as:- Maximum length: Size (in cm) of the largest male/unsexed or female specimen ever caught. (FishBase)
- Common length: Size (in cm) at which male/unsexed or female specimen(s) are commonly caught or marketed. (FishBase)
- [[TotalLength|Total length (TL)]]
References:
- https://en.wikipedia.org/wiki/Fish_measurement, http://www.fishbase.org/Glossary/Glossary.php?q=total+length&sc=is
