Urine production and urination in the plaice Pleuronectes platessa

Physiological responses to handling in the turbot

“…Aerial exposure had much less of an effect with only a transient elevation in plasma Na + and K + concentrations. The ionoregulatory mechanism(s) responsible for the elevations in plasma Na + and Cl concentrations were not identified in this study but available evidence from other stressed marine species does suggest that they would emanate from alterations in branchial osmotic (Fletcher, 1992) and ion (Pic, 1978) flux activity with a relatively minor or nonexistent renal (Fletcher, 1990) or intracellular (Starke & McManus, 1989) contribution. Pic (1978) found that handling of Fundulus heteroclitus (L.) and Mugil capito Cuvier, induced a rapid inhibition of Na + and Cl efflux.…”

Physiological responses to handling in the turbot

“…Aerial exposure had much less of an effect with only a transient elevation in plasma Na + and K + concentrations. The ionoregulatory mechanism(s) responsible for the elevations in plasma Na + and Cl concentrations were not identified in this study but available evidence from other stressed marine species does suggest that they would emanate from alterations in branchial osmotic (Fletcher, 1992) and ion (Pic, 1978) flux activity with a relatively minor or nonexistent renal (Fletcher, 1990) or intracellular (Starke & McManus, 1989) contribution. Pic (1978) found that handling of Fundulus heteroclitus (L.) and Mugil capito Cuvier, induced a rapid inhibition of Na + and Cl efflux.…”

Nitrogenous excretion in juvenile turbot, Scophthalmus maximus (L.), under controlled conditions

“…Danulat & Mommsen 1990). Discontinuous urination is also reported in the plaice, a flatfish (Fletcher 1990). The I emptying during the night of such a bladder in turbot is still to be confirmed.…”

Role of the kidneys in acid-base regulation and ammonia excretion in freshwater and seawater fish: implications for nephrocalcinosis

“…In marine fish, the UFRs are much lower, and urine is held in the bladder for very long periods during which time additional water is reabsorbed and the salts become even more concentrated ( Hickman and Trump, 1969 ; Beyenbach and Kirschner, 1975 ; Takvam et al, 2021a ). Whereas freshwater trout urinate about twice per hour ( Curtis and Wood, 1991 ), marine plaice ( Pleuronectes platessa ) urinate only once every 3–5 days ( Fletcher, 1990 )! Urine pH is generally very acidic in marine fish, 1.0–2.0 pH units below that of the blood plasma.…”

Physiological responses to handling in the turbot

“…Aerial exposure had much less of an effect with only a transient elevation in plasma Na + and K + concentrations. The ionoregulatory mechanism(s) responsible for the elevations in plasma Na + and Cl concentrations were not identified in this study but available evidence from other stressed marine species does suggest that they would emanate from alterations in branchial osmotic (Fletcher, 1992) and ion (Pic, 1978) flux activity with a relatively minor or nonexistent renal (Fletcher, 1990) or intracellular (Starke & McManus, 1989) contribution. Pic (1978) found that handling of Fundulus heteroclitus (L.) and Mugil capito Cuvier, induced a rapid inhibition of Na + and Cl efflux.…”

Nitrogenous excretion in juvenile turbot, Scophthalmus maximus (L.), under controlled conditions

“…Danulat & Mommsen 1990). Discontinuous urination is also reported in the plaice, a flatfish (Fletcher 1990). The I emptying during the night of such a bladder in turbot is still to be confirmed.…”

Role of the kidneys in acid-base regulation and ammonia excretion in freshwater and seawater fish: implications for nephrocalcinosis

“…In marine fish, the UFRs are much lower, and urine is held in the bladder for very long periods during which time additional water is reabsorbed and the salts become even more concentrated ( Hickman and Trump, 1969 ; Beyenbach and Kirschner, 1975 ; Takvam et al, 2021a ). Whereas freshwater trout urinate about twice per hour ( Curtis and Wood, 1991 ), marine plaice ( Pleuronectes platessa ) urinate only once every 3–5 days ( Fletcher, 1990 )! Urine pH is generally very acidic in marine fish, 1.0–2.0 pH units below that of the blood plasma.…”

Physiological responses to handling in the turbot

“…Aerial exposure had much less of an effect with only a transient elevation in plasma Na + and K + concentrations. The ionoregulatory mechanism(s) responsible for the elevations in plasma Na + and Cl concentrations were not identified in this study but available evidence from other stressed marine species does suggest that they would emanate from alterations in branchial osmotic (Fletcher, 1992) and ion (Pic, 1978) flux activity with a relatively minor or nonexistent renal (Fletcher, 1990) or intracellular (Starke & McManus, 1989) contribution. Pic (1978) found that handling of Fundulus heteroclitus (L.) and Mugil capito Cuvier, induced a rapid inhibition of Na + and Cl efflux.…”

Nitrogenous excretion in juvenile turbot, Scophthalmus maximus (L.), under controlled conditions

“…Danulat & Mommsen 1990). Discontinuous urination is also reported in the plaice, a flatfish (Fletcher 1990). The I emptying during the night of such a bladder in turbot is still to be confirmed.…”

Role of the kidneys in acid-base regulation and ammonia excretion in freshwater and seawater fish: implications for nephrocalcinosis

“…In marine fish, the UFRs are much lower, and urine is held in the bladder for very long periods during which time additional water is reabsorbed and the salts become even more concentrated ( Hickman and Trump, 1969 ; Beyenbach and Kirschner, 1975 ; Takvam et al, 2021a ). Whereas freshwater trout urinate about twice per hour ( Curtis and Wood, 1991 ), marine plaice ( Pleuronectes platessa ) urinate only once every 3–5 days ( Fletcher, 1990 )! Urine pH is generally very acidic in marine fish, 1.0–2.0 pH units below that of the blood plasma.…”