Hormonal Control of Osmoregulation in the Channel Catfish Ictalurus punctatus

Eckert, S M; Yada, Takashi; Shepherd, Brian S.; Stetson, Milton H.; Hirano, Tetsuya; Grau, E. Gordon

doi:10.1006/gcen.2001.7633

Cited by 78 publications

(34 citation statements)

References 33 publications

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“…Schreck (1990) recommended that osmoregulatory ability could be assessed by monitoring plasma sodium concentrations after a seawater challenge in euryhaline species and this is in fact very close to what we found in this study in common carp as a stenohaline fish (the main difference being the use of NaCl instead of sea salt for increasing environmental salinity). The increase in plasma Na + content as found in the current study is a common response of stenohaline species to salinity challenges (De Boeck et al 2000;Eckert et al 2001;Tam et al 2003;Benli & Yildis 2004). These increases could be the consequence of increase in Na + -K + ATPase, which is a good indicator of an osmoregulatory challenge, such as seen in euryhaline fish (Sardella et al 2007).…”

Section: Discussionsupporting

confidence: 72%

Effect of different levels of salinity on gill and kidney function in common carpCyprinus carpio(Pisces: Cyprinidae)

Salati

Baghbanzadeh

Soltani

et al. 2011

Italian Journal of Zoology

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Common carp is generally considered to be a stenohaline freshwater fish, but can tolerate a wide range of salinities and is therefore a good candidate for rearing in brackish water. The present study was undertaken to investigate the influence of environmental salinity on osmoregulatory mechanisms in the common carp (Cyprinus carpio). Seventy-five healthy adults of C. carpio were randomly divided into five groups kept in salinities of at least 3, 6, 9 and 12 g/l NaCl and a control (tap water) group. The salinity was gradually increased by 3 g/l daily, until the desired concentration for each group was reached. Then the urinary papilla was catheterized to allow urine collection. Urine was collected once daily for 14 days and after this period blood and gill tissue were sampled and plasma electrolytes and gill Na + -K + ATPase activity were assayed. Plasma sodium and chloride significantly increased in response to increased environmental salinity (P≤0.05). Gill Na + -K + ATPase activity had significantly increased in response to increased environmental salinity (P≤0.05). Our results showed that common carp can tolerate environmental salinities up to at least 12 g/l, but survival at salinities of at least 6 g/l and higher requires profound changes in function of gill and kidney as principal osmoregulatory organs.

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Section: Discussionsupporting

confidence: 72%

Effect of different levels of salinity on gill and kidney function in common carpCyprinus carpio(Pisces: Cyprinidae)

Salati

Baghbanzadeh

Soltani

et al. 2011

Italian Journal of Zoology

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“…In the present experiment, it is possible that other hormones are involved in the osmoregulation of O. bonariensis as cortisol treatment did not affect plasma osmolality and individual ions, fact also observed in channel catfish transferred to hyperionic salt water (Davis and Simco, 1976;Eckert et al, 2001) and in coho salmon during seawater acclimation (Redding et al, 1984). These last authors suggested that other factors in addition to cortisol might be required to activate ion transport mechanisms in coho salmon.…”

Section: Resultssupporting

confidence: 58%

“…Cortisol injection increased ATPase activity and reduced the increases in plasma Na + in the stenohaline common carp, Cyprinus carpio, after transfer to a salinity of 15ppt, whereas in the euryhaline tilapia, Oreochromis mossambicus (=Sarotherodon mossambicus) exposed to 27ppt, it inhibited enzyme activity and had no effect on the Na + concentration (Abo Hegab and Hanke, 1984). In yearling coho salmon, Oncorhynchus kisutch, and in channel catfish, Ictalurus punctatus, cortisol treatment did not prevent changes in plasma osmolality and electrolyte concentrations in fresh water or during seawater acclimation (Redding et al, 1984;Eckert et al, 2001). Therefore, cortisol influence on the osmoregulatory process seems to differ widely among fish.…”

Section: Introductionmentioning

confidence: 91%

The significance of cortisol on acclimation to salinity in pejerrey Odontesthes bonariensis

Tsuzuki

Ogawa

Strüssmann

et al. 2007

Arq. Bras. Med. Vet. Zootec.

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The role of cortisol on the osmoregulation of pejerrey Odontesthes bonariensis at different salinities was investigated in adult fish injected with 0.7mg hydrocortisone per 100g body weight of fish, and transferred to 0, 5 and 20ppt of NaCl. Blood cortisol was 566ng/ml at the beginning of the experiment (0h) but surged to 1250ng/ml within 3h in cortisol-injected fish. Cortisol levels were influenced not only by treatment but also by time, being higher at 3h compared to 24h. Salinity level, time of exposure and their interaction, but not cortisol treatment, significantly affected plasma osmolality and the concentration of ions Cl -and Na + . This study showed that exogenous cortisol does not seem to play a significant role on the regulation of plasma osmolality and concentration of individual ions in pejerrey.Keywords: pejerrey, Odontesthes bonariensis, cortisol, osmoregulation, salinity RESUMO Investigou-se a participação do cortisol na osmoregulação de peixe-rei

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“…In a shortterm experiment, cortisol (Sigma, St Louis, MO, USA), dissolved in soybean oil (2 and 10 mg/ml), was injected intraperitoneally at doses of 2 and 10 µg/g (n=8-10). Doses of cortisol were selected according to our previous study (Eckert et al 2001) and our preliminary experiments using different doses of cortisol at different sampling intervals. Control fish received soybean oil only (0·1 ml/ 100 g).…”

Section: Experimental Protocolsmentioning

confidence: 99%

Dual mode of cortisol action on GH/IGF-I/IGF binding proteins in the tilapia, Oreochromis mossambicus

Kajimura¹,

Hirano²,

Visitacion³

et al. 2003

Journal of Endocrinology

101

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Hormonal Control of Osmoregulation in the Channel Catfish Ictalurus punctatus

Cited by 78 publications

References 33 publications

Effect of different levels of salinity on gill and kidney function in common carpCyprinus carpio(Pisces: Cyprinidae)

Effect of different levels of salinity on gill and kidney function in common carpCyprinus carpio(Pisces: Cyprinidae)

The significance of cortisol on acclimation to salinity in pejerrey Odontesthes bonariensis

Dual mode of cortisol action on GH/IGF-I/IGF binding proteins in the tilapia, Oreochromis mossambicus

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