1998
DOI: 10.1051/kmae:1998008
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Effets négatifs de pH extrêmes sur le développement embryonnaire et larvaire du brochet Esox lucius L.

Abstract: RÉSUMÉParmi les facteurs abiotiques conditionnant la survie au cours de la vie embryonnaire et larvaire des poissons, le pH semble jouer un rôle primordial. La motivation de ce travail provient d'observations sur les importantes variations de ses valeurs au printemps, l'existence de pH très acides en étangs forestiers et des mortalités importantes de brochetons au cours de la même période.Lexpérimentation s'est déroulée en aquariums avec une gamme de valeurs allant de 4,5 à 10,5 unités pH. Des tests en bains, … Show more

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“…Lethal effects of pH were fully established after 24 h of exposure for both acidic and basic ranges (see Tables and ). Generally our data agreed with previous literature on fish toxicity, where pH was shown to significantly impact fish survival at values below 5 and above 10 . Cardiac effects, for example pericardial edemas and reduced heart rate, were the most noticeable sublethal effects for acidic and alkaline pH, however, they were observed at concentrations close to mortality and may be associated with overall toxicity rather than representing specific effects (see Tables and ).…”
Section: Discussionsupporting
confidence: 91%
“…Lethal effects of pH were fully established after 24 h of exposure for both acidic and basic ranges (see Tables and ). Generally our data agreed with previous literature on fish toxicity, where pH was shown to significantly impact fish survival at values below 5 and above 10 . Cardiac effects, for example pericardial edemas and reduced heart rate, were the most noticeable sublethal effects for acidic and alkaline pH, however, they were observed at concentrations close to mortality and may be associated with overall toxicity rather than representing specific effects (see Tables and ).…”
Section: Discussionsupporting
confidence: 91%