System Glossary
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Definition of Term

fork length (View picture)
(English) Length of a fish measured from the tip of the snout to the posterior end of the middle caudal rays. This measurement is used instead of standard length for fishes on which it is difficult to ascertain the end of the vertebral column, and instead of total length in fish with stiff, forked tail, e.g., tuna. Mostly used in fishery biology and not in systematics. (See also: standard length, total length)
longueur à la fourche (View picture)
(French) Longueur d'un poisson mesuré de la pointe du museau à l'extrémité postérieur des rayons caudaux centraux. Cette mesure est utilisée au lieu de longueur standard pour les poissons sur qu'il est difficile de constater l'extrémité de la colonne vertébrale, et au lieu de longueur totale dans les poisson avec queue raide, bifurquée, par exemple, le thon. (See also: standard length, total length)
comprimento Àfurca (View picture)
(Portuguese) Comprimento dum peixe medido da ponta do focinho à porção posterior dos raios centrais da barbatana caudal. Esta medição é utilizada em vez do comprimento standard em espécies em que é difícil determinar o fim da coluna vertebral e em vez do comprimento total em espécies com a barbatana caudal rígida, como por ex. o atum. (See also: standard length, total length)

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