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ABUNDANCE-AT-AGE [1 record]

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Record 1 2021-01-18

English

Subject field(s)
  • Statistics
  • Commercial Fishing
CONT

Catch-curves plot the frequency of fish grouped by either size or age … Because size is often a poor indicator of cohort membership …, age estimated from the daily increment ageing technique is preferred. Abundance-at-age usually decreases exponentially, making the slope … the time-specific rate of mortality.

PHR

abundance at age 2, age-0 abundance

French

Domaine(s)
  • Statistique
  • Pêche commerciale
CONT

[Les] courbes de capture […] représentent la fréquence des tailles ou des âges du poisson capturé […]. Mais comme la taille est souvent un mauvais indicateur de la cohorte d'origine […], il est préférable d'utiliser l'âge établi par dénombrement des accroissements journaliers. L'abondance par âge diminuant habituellement de façon exponentielle, la pente […] devient le taux de mortalité à un moment donné.

Spanish

Campo(s) temático(s)
  • Estadística
  • Pesca comercial
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