Effects of external Mg2+ and Ca2+ on branchial osmotic water permeabiligy and prolactin secretion in the teleost fish Sarotherodon mossambicus

Bonga, S.E. Wendelaar; Löwik, C.W.G.M.; Meij, J.C.A. van der

doi:10.1016/0016-6480(83)90116-8

Cited by 52 publications

(9 citation statements)

References 31 publications

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“…This study derives support from the observations of Fu (1989) who has noticed an increased activity of prolactin cells in cadmium exposed tilapia. Prolactin has been reported to provoke hypercalcemia in various species of fishes (Wendelaar Bonga and Pang, 1991; Flik et al, 1994) mainly by controlling the gill epithelium permeability (Wendelaar Bonga et al, 1983). The observed hypocalcemia noticed in this study after cypermethrin treatment may be the possible reason for the hyperactivity of the prolactin cells.…”

Section: Discussionmentioning

confidence: 99%

Histological alterations in the prolactin cells of a teleost, Heteropneustes fossilis, after exposure to cypermethrin

Mishra

Rai

Srivastav

et al. 2011

Environmental Toxicology

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Freshwater fish Heteropneustes fossilis (H. fossilis) were subjected to 5.76 μg/L (80% of 96 h LC(50) ) and 1.44 μg/L (20% of 96 h LC(50) ) of cypermethrin for short-term (96 h) and long-term (28 days) duration, respectively. Plasma calcium of H. fossilis exposed for short term (96 h) to cypermethrin exhibited no change at 24 h. The levels indicate a decrease in plasma calcium at 48 h. This response persists till the close of experiment (96 h). No change has been noticed throughout the experiment in the histological structure and nuclear volume of prolactin cells of short-term cypermethrin treated fish. Long-term exposure of cypermethrin to fish provoked hypocalcemia. The prolactin cells remain unchanged till 7 days following cypermethrin treatment. After 14 days, the nuclear volume exhibits an increase and the cells exhibit degranulation. These changes increase progressively 21 days onwards. Also, few degenerating cells are discerned after 28 days.

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Section: Discussionmentioning

confidence: 99%

Histological alterations in the prolactin cells of a teleost, Heteropneustes fossilis, after exposure to cypermethrin

Mishra

Rai

Srivastav

et al. 2011

Environmental Toxicology

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“…Increased environmental Ca + concentration decreased UIA toxicity in channel catfish (Tomasso et al 1980) and sunshine bass (Weirich et al 1993), presumably by decreasing gill membrane permeability (Wendelarr Bong et al 1983) or facilitating Na + –K + adenosine triphosphatase activity (Tomasso et al 1980). Relatively small increases in environmental Ca + concentrations (108.9 mg/L total hardness, ca.…”

Section: Discussionmentioning

confidence: 99%

Influence of pH, Salinity, Calcium, and Ammonia Source on Acute Ammonia Toxicity to Golden Shiners, Notemigonus crysoleucas

Sink¹

2010

Journal of the World Aquaculture Society

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Holding fish at elevated densities with limited water exchange can produce situations where ammonia concentrations are acutely elevated. Ammonia accumulation is considered a major density‐limiting factor during transport and holding of golden shiners, Notemigonus crysoleucas, but unionized ammonia (UIA) toxicity to golden shiners has not been studied in detail. Studies were undertaken to examine 48‐ and 72‐h UIA toxicity to golden shiners in response to ammonia source, pH, calcium concentration, and salinity. Shiners were exposed to geometrically increasing increments of UIA under selective environmental conditions, and monitored for mortality within 48 and 72 h. Probit regression was used to calculate median and 1% lethal concentrations of UIA to golden shiners. No difference in toxicity of ammonium chloride salt or aqueous ammonia hydroxide to golden shiners was found. UIA toxicity to golden shiners was much greater than previously reported, and increased as pH increased (72‐h LC50: 1.26 mg/L UIA at pH 7; 0.75 mg/L UIA at pH 8; 0.71 mg/L UIA at pH 9). An increase in environmental calcium (75 mg/L) decreased the toxicity of UIA to shiners by 21.7% at pH 8, whereas salinity had no effect on UIA toxicity. To limit golden shiner losses caused by UIA toxicity, calcium chloride should be added to water sources that contain <100 mg/L hardness, and vats and holding tanks should be flushed if UIA concentrations approach 0.13 (pH 7), 0.11 (pH 8), or 0.10 (pH 9) mg/L at 48 h or 0.12 (pH 7), 0.08 (pH 8), or 0.07 (pH 9) mg/L after 72 h.

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“…For example, in tilapia species, PRL reduces Na + efflux and water permeability in the gill (Dharmamba et al. 1967; Dharmamba & Maetz 1972; Wendelaar Bonga et al. 1983; Nebel et al.…”

Section: Discussionmentioning

confidence: 99%

The effect of environmental salinity on the proteome of the sea bass (Dicentrarchus labrax L.)

Lorgeril

Hirtz

et al. 2007

Animal Genetics

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The European sea bass, Dicentrarchus labrax L., tolerates a range of salinities from freshwater to hyper-saline. To study differences in protein expression, fish were reared in both freshwater and seawater. After 3-month acclimation, gill and intestine epithelia were collected and the soluble protein extracted. In all, 362 spots were differentially expressed in the gills and intestines of fishes reared in seawater compared to those from freshwater. Fifty differential protein spots were excised from a colloidal Coomassie-stained gel. Nine separate protein spots were identified unambiguously by mass spectrometry and database searching. Among the six proteins over-expressed in gill cells in seawater, five were cytoskeleton proteins and one was the aromatase cytochrome P450. In gill cells under freshwater conditions, the two over-expressed proteins identified were the prolactin receptor and the major histocompatibility complex class II beta-antigen. In intestinal cells under freshwater conditions, the Iroquois homeobox protein Ziro5 was upregulated over ninefold. The expression of these proteins, their possible direct or indirect roles in the adaptation of D. labrax to salinity, and their correspondences with a previous study are discussed.

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Effects of external Mg2+ and Ca2+ on branchial osmotic water permeabiligy and prolactin secretion in the teleost fish Sarotherodon mossambicus

Cited by 52 publications

References 31 publications

Histological alterations in the prolactin cells of a teleost, Heteropneustes fossilis, after exposure to cypermethrin

Histological alterations in the prolactin cells of a teleost, Heteropneustes fossilis, after exposure to cypermethrin

Influence of pH, Salinity, Calcium, and Ammonia Source on Acute Ammonia Toxicity to Golden Shiners, Notemigonus crysoleucas

The effect of environmental salinity on the proteome of the sea bass (Dicentrarchus labrax L.)

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