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YEAR CLASS SIZE [3 records]

Record 1 2023-03-30

English

Subject field(s)
  • Ecology (General)
  • Oceanography
CONT

Population status refers to the current state of the population and considers factors such as abundance, age and sex structure, and health (i.e., nutritional and physiological condition).

CONT

The population status of Walleye of Tathlina Lake appears to have improved between 2001 and 2007. The mean size(length and weight) of Walleye and age of Walleye has increased, while the increase in catch-per-unit effort of and proportion of Walleye in the total catch suggests an increase in Walleye biomass in the lake. The presence of the strong 1997 year class that reached sexual maturity in 2003 was left to spawn multiple times without considerable harvest has likely helped improve the status of the population.

OBS

population status: term in use at Fisheries and Oceans Canada.

OBS

Fisheries and Oceans Canada describes the population status as either poor, fair, good, unknown or extirpated.

French

Domaine(s)
  • Écologie (Généralités)
  • Océanographie
OBS

état de la population : terme en usage à Pêches et Océans Canada.

OBS

Les catégories utilisées par le ministère des Pêches et des Océans du Canada pour décrire l'état d'une population sont : mauvais, passable, bon, inconnu et disparu.

Spanish

Save record 1

Record 2 2022-02-21

English

Subject field(s)
  • Commercial Fishing
  • Aquaculture
DEF

The average size of the fish in a year class at the time when the instantaneous rate of natural mortality equals the instantaneous rate of growth in weight for the year class as a whole.

French

Domaine(s)
  • Pêche commerciale
  • Aquaculture
DEF

Taille moyenne des poissons d'une même classe d'âge au moment où le taux instantané de mortalité naturelle égale le taux instantané de croissance, en poids, pour l'ensemble de la classe d'âge.

Spanish

Save record 2

Record 3 2001-01-12

English

Subject field(s)
  • Silviculture
DEF

The average annual net increase in the volume of trees during the period between inventories.

OBS

Components of net annual growth include the increment in net volume of trees at the beginning of the period surviving to the end of the period, plus the net volume of trees reaching the minimum size class during the year, minus the volume of trees that died and the net volume of trees that became cull during the period.

French

Domaine(s)
  • Sylviculture
DEF

Accroissement annuel moyen du volume des tiges au cours de la période qui s'est écoulée entre deux inventaires.

Spanish

Save record 3

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