Osmotic Adaptation in Fishes

Parry, Gwyneth

doi:10.1111/j.1469-185x.1966.tb01499.x

Cited by 168 publications

(54 citation statements)

References 206 publications

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“…When a drug is added to water, there are several possible absorption routes. Absorption of drugs through the gills is assumed to b e of major importance whereas absorption through the skin is of relatively little significance (Parry 1966). In seawater drugs can be absorbed via the intestine as a result of the fish drinking the surrounding medium (Motais & Garcia-Romeu 1972).…”

Section: Discussionmentioning

confidence: 99%

Bath treatment, an alternative method for the administration of the quinolones flumequine and oxolinic acid to halibut Hippoglossus hippoglossus, and in vitro antibacterial activity of the drugs against some Vibrio sp.

Samuelsen¹,

Lunestad²

1996

Dis. Aquat. Org.

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in muscle and 85.4 pg g-' in abdominal organ homogenate and oxolinic acid concentrations of 9.4 pg g-' in muscle and 72.6 pg g-' in abdominal organ homogenate. Excretion of both antibacterials was rapid and characterised by elunination half-lives (t1,2) of 10 and 15.6 h respectively for flumequine and oxolinic acid In muscle and 9.8 and 15.0 h respectively in the abdominal organ homogenate. The corresponding elimination times (E,) were 6.5 and 8 d respectively for flumequine and oxolinic acid in muscle and 7.5 and 9 d respectively in abdominal organ homogenate when a maximum residue concentration of 0.05 pg g-' was applied for both drugs. The minimum inhibitory concentration (MIC) against strains of Vibrio sp. ranged from 0.015 to 1.0 pg m]-' for flurnequine and 0.015 to 0.5 pg ml-' for oxolinic acid. Following bath treatment, tissue levels of flumequine and oxolinic acid greater than MIC for susceptible strains (<0.0625 pg rnl-') were maintained for up to 6.5 and 8 d respectively for flumequine and oxolinic acid in muscle and 7.5 and 9 d respectively in abdominal organ homogenate.

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Section: Discussionmentioning

confidence: 99%

Bath treatment, an alternative method for the administration of the quinolones flumequine and oxolinic acid to halibut Hippoglossus hippoglossus, and in vitro antibacterial activity of the drugs against some Vibrio sp.

Samuelsen¹,

Lunestad²

1996

Dis. Aquat. Org.

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“…This problem is overcome by an active uptake of monovalent ions across the gills and the excretion of a copious and dilute urine by the kidney ( Fig.·1A; Smith, 1932;Krogh, 1939;Parry, 1966;Perry, 1997). The uptake of Na + and Cl -by various vertebrates in freshwater, i.e.…”

Section: Osmoregulatory Mechanisms In Freshwatermentioning

confidence: 99%

Cellular composition and ultrastructure of the gill epithelium of larval and adult lampreys

Bartels

Potter

2004

Journal of Experimental Biology

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SUMMARY Lampreys, one of the only two surviving groups of agnathan (jawless)vertebrates, contain several anadromous species that, during their life cycle,thus migrate from fresh to seawater and back to freshwater. Lampreys have independently evolved the same overall osmoregulatory mechanisms as the gnathostomatous (jawed) and distantly related teleost fishes. Lamprey gills thus likewise play a central role in taking up and secreting monovalent ions. However, the ultrastructural characteristics and distribution of their epithelial cell types [ammocoete mitochondria-rich (MR) cell, intercalated MR cell, chloride cell and pavement cell] differ in several respects from those of teleosts. The ultrastructural characteristics of these cells are distinctive and closely resemble those of certain ion-transporting epithelia in other vertebrates, for which the function has been determined. The data on each cell type, together with the stage in the life cycle at which it is found, i.e. whether in fresh or seawater, enable the following proposals to be made regarding the ways in which lampreys use their gill epithelial cells for osmoregulating in hypo- and hypertonic environments. In freshwater, the intercalated MR cell takes up Cl– and secretes H+,thereby facilitating the uptake of Na+ through pavement cells. In seawater, the chloride cell uses a secondarily active transcellular transport of Cl– to provide the driving force for the passive movement of Na+ through leaky paracellular pathways between these cells.

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“…The pronephros is usually superseded as the functional kidney in embryonic development in fish (for a review of the literature see Fraser 1950), yet it is the only functional system in the whitebait. This persistence and the observed activity of the blood in the gills, which has been correlated with the general changes involved in migration between seawater and freshwater (for a review of osmoregulation in fish see Parry 1966), suggest that there may be some cue to initiate migration from the osmotic balance of the juvenile G. m. attenuatus, combined with a changed thyroid output. taken between 3 September 1959 and 17 November 1959, and totalled 1,079 fish.…”

Section: The Whitebait Stage Of Galaxias Maculatus Attenuatusmentioning

confidence: 99%

A consideration of the whitebait stage of Galaxias maculatus attenuatus (Jenyns)

Benzie¹

1968

New Zealand Journal of Marine and Freshwater Research

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SUMMARYThe size composition of a season's catch of Galaxias maculatus attenuatus (Jenyns) whitebait is given. An analysis of consecutive catches shows that there is no overall increase in the size of the whitebait caught. This supports the theory that these fish have reached a physiological stage at which they migrate up accessible freshwater streams. The subsequent changes are so great that they warrant the term metamorphosis.The whitebait stages of other species of Galaxias are briefly compared.

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Osmotic Adaptation in Fishes

Cited by 168 publications

References 206 publications

Bath treatment, an alternative method for the administration of the quinolones flumequine and oxolinic acid to halibut Hippoglossus hippoglossus, and in vitro antibacterial activity of the drugs against some Vibrio sp.

Bath treatment, an alternative method for the administration of the quinolones flumequine and oxolinic acid to halibut Hippoglossus hippoglossus, and in vitro antibacterial activity of the drugs against some Vibrio sp.

Cellular composition and ultrastructure of the gill epithelium of larval and adult lampreys

A consideration of the whitebait stage of Galaxias maculatus attenuatus (Jenyns)

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