TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

FERTILIZATION EFFECT [4 records]

Record 1 2021-06-01

English

Subject field(s)
  • Scientific Measurements and Analyses
  • Aquaculture
DEF

The percentage of eggs that [have developed into new individuals by uniting a male reproductive cell or sperm].

CONT

The second experiment examined the effect of various sperm-to-egg ratios on fertilization rate. Pooled samples of eggs were fertilized with pooled samples of sperm at various ratios...

Key term(s)
  • fertilisation rate

French

Domaine(s)
  • Mesures et analyse (Sciences)
  • Aquaculture

Spanish

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Record 2 2021-01-26

English

Subject field(s)
  • Aquaculture
  • Animal Reproduction
CONT

… there was no effect on fertilization success for Lithobates pipiens when sperm were obtained after repeated hormonal treatment … In [Rhinella] marina and [Anaxyrus] fowleri, induction of spermiation twice a week resulted in less sperm concentration compared with treatment once a week or every other week...

French

Domaine(s)
  • Aquaculture
  • Reproduction des animaux
CONT

Pour les mâles, l'induction de la spermiation est réalisée à partir de différentes hormones […]

Spanish

Campo(s) temático(s)
  • Acuicultura
  • Reproducción de animales
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Record 3 2011-03-21

English

Subject field(s)
  • Climate Change
CONT

There is another small mystery in the latest edition of the NGGI : plants grow faster and take up more carbon dioxide when atmospheric concentrations of the gas increase, but there is no mention in the inventory of this "CO2 fertilization" effect.

OBS

CO2 fertilizing effect; CO2 fertilization effect : The number 2 is subscripted.

French

Domaine(s)
  • Changements climatiques
CONT

Sous l'effet notamment de l'enrichissement de l'air en gaz carbonique, leur aliment de prédilection, les plantes absorberaient ainsi de plus en plus de carbone [...] Sur plusieurs espèces d'arbres, comme le sapin pectiné des Vosges, l'épaisseur des cernes d'accroissement annuel est en augmentation depuis 1850. Cet effet fertilisant pourrait favoriser l'absorption de 0,3 à 1,5 milliard de tonnes de carbone.

OBS

effet fertilisant du CO2 : Le chiffre 2 s'écrit en indice.

Spanish

Save record 3

Record 4 2004-02-16

English

Subject field(s)
  • Environmental Studies and Analyses
  • Toxicology
OBS

EC; effect concentration: This [toxicological value] is generally followed by a number, which indicates the percentage of a population which experience the effect.

OBS

Typical levels are EC 10, EC 25, EC 50, EC 75, EC 100. NOEC: No observable effect concentration; LOEC: Lowest observable effect concentration.

CONT

Developing Hormosira banksii embryos, used as bioassays in toxicity studies, identified ammonium as a toxicant in secondary treated sewage effluent discharged at Boags Rocks, Victoria, Australia. Ammonium did not affect fertilization but had a significant effect on germination at 48 h and cell division at 72 h with most damage occurring in the first 48 h. Ammonium showed a similar effect as whole effluent(when expressed as mg N l-1 ammonium), sampled in June, September and November 1997, on developing H. banksii embryos. This similarity is further confirmed with comparable EC50(concentration causing an effect on 50% of the population tested) and LOEC(lowest observable effect concentration) values. Mean EC50 values for the ammonium bioassays were 3. 19 mg N l-1 for germination and 6. 14 mg N l-1 for cell division.

PHR

Effect concentration low (ECL), median effect concentration (EC50), lowest observable effect concentration (LOEC), no-observed-effect concentration (NOEC), threshold effect concentration (TEC).

French

Domaine(s)
  • Études et analyses environnementales
  • Toxicologie
CONT

Concentration entraînant un effet à long terme.

CONT

Concentration minimale produisant un effet.

CONT

Évaluation du rapport dose (concentration)-réponse (effet). L'objectif est de déterminer la concentration en dessous de laquelle la substance ne devrait pas avoir d'effets indésirables sur la composante de l'environnement considérée. Cette concentration est dénommée concentration prévue sans effet (PNEC). Toutefois, il se peut que dans certains cas il ne soit pas possible d'établir une PNEC et il faut alors effectuer une estimation qualitative de la relation dose (concentration)-réponse (effet). Pour calculer la PNEC, on peut appliquer un facteur d'évaluation aux valeurs provenant des essais effectués sur les organismes, par exemple à la DL50 (dose létale médiane), à la CL50 (concentration létale médiane), à la CE50 (concentration effective médiane), à la CI50 (concentration provoquant cinquante pour cent d'inhibition d'un paramètre donné, par exemple la croissance), au NOEL(C) (dose (concentration) sans effet observé), au LOEL(C) (dose (concentration) entraînant l'effet observé le plus faible) ou d'autres méthodes appropriées.

Spanish

Save record 4

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