Ammonia and urea excretion from mudskipper fishes Periophthalmus cantonensis and Boleophthalmus pectinirostris transferred from land to water

Ammonia and urea handling by early life stages of fishes

“…In adult fishes, only one study (Smith, 1929) has measured cutaneous J urea , but found it to be negligible in goldfish and common carp. However, J urea through the skin might be substantial in some marine teleosts (Morii et al, 1979;Sayer and Davenport, 1987). Unfortunately, it is not possible to use the divided chamber approach adopted in Zimmer and Wood (2016) to address the overall contributions of renal J urea versus cutaneous J urea in larval trout, as urinary catheterization of fish this small is not feasible.…”

Ammonia and urea handling by early life stages of fishes

“…In adult fishes, only one study (Smith, 1929) has measured cutaneous J urea , but found it to be negligible in goldfish and common carp. However, J urea through the skin might be substantial in some marine teleosts (Morii et al, 1979;Sayer and Davenport, 1987). Unfortunately, it is not possible to use the divided chamber approach adopted in Zimmer and Wood (2016) to address the overall contributions of renal J urea versus cutaneous J urea in larval trout, as urinary catheterization of fish this small is not feasible.…”

Adaptations of amphibious fish for surviving life out of water

“…However, nearly all values of <0.50 come from a single set of studies that are unclear in experimental design and data presentation (Gordon et al. 1969, 1970, 1978) and where estimated excretion proportions are clearly different from other studies on the same fish species (Morii et al. 1978, 1979; Iwata et al.…”

Postprandial increases in nitrogenous excretion and urea synthesis in the giant mudskipperPeriophthalmodon schlosseri

“…The activities of arginase and urate oxidase in their livers are high enough to account for the rate of urea excretion (Gregory, 1977). Working on the mudskippers Periophthalmus modestus (as P. cantonensis) and Boleophthalmus pectinitrostris, Morii (1979) and Morii et al (1978Morii et al ( , 1979 reported that ammonia was not detoxified to urea in these mudskippers during aerial exposure. Iwata et al (1981) and Iwata (1988) also reported that urea production remained unchanged in P. modestus exposed to environmental ammonia or terrestrial conditions.…”

Ammonia and urea handling by early life stages of fishes

“…In adult fishes, only one study (Smith, 1929) has measured cutaneous J urea , but found it to be negligible in goldfish and common carp. However, J urea through the skin might be substantial in some marine teleosts (Morii et al, 1979;Sayer and Davenport, 1987). Unfortunately, it is not possible to use the divided chamber approach adopted in Zimmer and Wood (2016) to address the overall contributions of renal J urea versus cutaneous J urea in larval trout, as urinary catheterization of fish this small is not feasible.…”

Adaptations of amphibious fish for surviving life out of water

“…However, nearly all values of <0.50 come from a single set of studies that are unclear in experimental design and data presentation (Gordon et al. 1969, 1970, 1978) and where estimated excretion proportions are clearly different from other studies on the same fish species (Morii et al. 1978, 1979; Iwata et al.…”

Postprandial increases in nitrogenous excretion and urea synthesis in the giant mudskipperPeriophthalmodon schlosseri

“…The activities of arginase and urate oxidase in their livers are high enough to account for the rate of urea excretion (Gregory, 1977). Working on the mudskippers Periophthalmus modestus (as P. cantonensis) and Boleophthalmus pectinitrostris, Morii (1979) and Morii et al (1978Morii et al ( , 1979 reported that ammonia was not detoxified to urea in these mudskippers during aerial exposure. Iwata et al (1981) and Iwata (1988) also reported that urea production remained unchanged in P. modestus exposed to environmental ammonia or terrestrial conditions.…”

Ammonia and urea handling by early life stages of fishes

“…In adult fishes, only one study (Smith, 1929) has measured cutaneous J urea , but found it to be negligible in goldfish and common carp. However, J urea through the skin might be substantial in some marine teleosts (Morii et al, 1979;Sayer and Davenport, 1987). Unfortunately, it is not possible to use the divided chamber approach adopted in Zimmer and Wood (2016) to address the overall contributions of renal J urea versus cutaneous J urea in larval trout, as urinary catheterization of fish this small is not feasible.…”

Adaptations of amphibious fish for surviving life out of water

“…However, nearly all values of <0.50 come from a single set of studies that are unclear in experimental design and data presentation (Gordon et al. 1969, 1970, 1978) and where estimated excretion proportions are clearly different from other studies on the same fish species (Morii et al. 1978, 1979; Iwata et al.…”

Postprandial increases in nitrogenous excretion and urea synthesis in the giant mudskipperPeriophthalmodon schlosseri

“…The activities of arginase and urate oxidase in their livers are high enough to account for the rate of urea excretion (Gregory, 1977). Working on the mudskippers Periophthalmus modestus (as P. cantonensis) and Boleophthalmus pectinitrostris, Morii (1979) and Morii et al (1978Morii et al ( , 1979 reported that ammonia was not detoxified to urea in these mudskippers during aerial exposure. Iwata et al (1981) and Iwata (1988) also reported that urea production remained unchanged in P. modestus exposed to environmental ammonia or terrestrial conditions.…”