Clearance of plasma corticosteroids during smoltification of coho salmon, Oncorhynchus kisutch

Patiño, Reynaldo; Cb, Schreck; Jm, Redding

doi:10.1016/0300-9629(85)90428-1

Cited by 26 publications

(6 citation statements)

References 25 publications

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“…One question still to be answered is whether the clearance of cortisol via the gills represents passive ‘leakage’ or active ‘excretion’. Patiño et al . (1985) suggested that the gills may play an active role in cortisol excretion because plasma clearance rate of cortisol metabolites in coho salmon Oncorhynchus kisutch (Walbaum) was correlated to gill Na + K + ATPase activity, implying an energy consuming process.…”

Section: Discussionmentioning

confidence: 99%

A non‐invasive stress assay based upon measurement of free cortisol released into the water by rainbow trout

Ellis

James

Stewart

et al. 2004

Journal of Fish Biology

243

206

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A procedure previously used for sex steroids was adapted to extract free cortisol and cortisone from water samples taken from rainbow trout Oncorhynchus mykiss tanks. Both corticosteroids could be readily detected by radioimmunoassay (RIA), with cortisol being predominant. All stages of the sampling, extraction and RIA procedure were validated for cortisol. An intermittent problem with poor replication was traced to the use of diethyl ether during the extraction procedure, and was overcome by the use of ethyl acetate. Other modifications were also introduced to speed up the procedure. The concentration and time course of release of both corticosteroids were shown to be related to the degree of stress that the fish had been subjected to. It was confirmed that cortisol concentrations in water and estimated cortisol release rates increased in response to handling stress, and that both were correlated with plasma cortisol concentrations. The potential for using water cortisol concentration and release rates to assess the primary stress response of fishes as a non-invasive alternative to blood sampling is discussed.# 2004 Crown copyright

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Section: Discussionmentioning

confidence: 99%

A non‐invasive stress assay based upon measurement of free cortisol released into the water by rainbow trout

Ellis

James

Stewart

et al. 2004

Journal of Fish Biology

243

206

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“…In addition, the relations between plasma hormone concentrations and the biological activity of hormones are unclear. Hormones must bind to receptors to begin their action (Hadley 1992), and plasma hormone concentrations are functions of both production and clearance rates (Specker et al 1984;Patino et al 1985;Schreck et al 1985;Sakamoto et al 1991). Specker et al (1992) showed that tissue triiodothyronine (T 3 ) concentrations (which might better reflect receptor binding rates) in yearling coho salmon showed poor relations to both plasma T 3 and T 4 concentrations.…”

Section: Smolt Indicesmentioning

confidence: 99%

Growth, Smoltification, and Smolt-to-Adult Return of Spring Chinook Salmon from Hatcheries on the Deschutes River, Oregon

Beckman

Dickhoff

Zaugg

et al. 1999

Transactions of the American Fisheries Society

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“…This result suggests that a higher frequency of exposure to disturbance by otter can lead to metabolic adaptability of the fish. It is suggested that the E in teleost fish arises from F (Patino et al 1985(Patino et al , 1987Balm 1986). But it is not clearly established whether it possess biological activity in fish or it is present only as an inactive metabolite of F (Potinger and Moran 1993).…”

Section: Discussionmentioning

confidence: 98%

Physiological responses of over-wintering common carp (Cyprinus carpio) to disturbance by Eurasian otter (Lutra lutra)

Poledník

Řehulka

Kranz

et al. 2007

Fish Physiol Biochem

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Using a tame animal, the impact of otter (Lutra lutra) disturbance on over-wintering carp (Cyprinus carpio) was monitored in two experiments, 133 and 140 days, respectively, over two consecutive winters (November-April). The level of stress in over-wintering carp exposed to various intensities of disturbance by otters was quantified using biological indicators of stress (cortisol, cortisone, indices of nitrogen, carbohydrate, lipid and mineral metabolism and activity of basic blood plasma enzymes) taken from blood plasma of stocked carp at the end of the winter seasons (when the photoperiod was 12 light:12 dark, respectively, 13L:10D). Moreover, condition (Fulton's coefficient of condition and fat content in muscles) and mortality rate of that carp were measured after over-wintering and also after the subsequent vegetation period. The analysis of blood and tissue samples of experimental fish showed changes in nitrogen, carbohydrate and mineral metabolism as well as levels of hormones and fat reserves. Higher response to stress in metabolism of carp with lower intensity of disturbance by otter suggests that high level of disturbance can lead to metabolic adaptation of carp to stress. The effect of stress on the mortality rate of carp during the over-wintering is not clear. Nevertheless, the negative effect of stress on survival, condition and growth rate of carp in the subsequent vegetation period was not observed.

show abstract

Clearance of plasma corticosteroids during smoltification of coho salmon, Oncorhynchus kisutch

Cited by 26 publications

References 25 publications

A non‐invasive stress assay based upon measurement of free cortisol released into the water by rainbow trout

A non‐invasive stress assay based upon measurement of free cortisol released into the water by rainbow trout

Growth, Smoltification, and Smolt-to-Adult Return of Spring Chinook Salmon from Hatcheries on the Deschutes River, Oregon

Physiological responses of over-wintering common carp (Cyprinus carpio) to disturbance by Eurasian otter (Lutra lutra)

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