Stress responses in rainbow trout Oncorhynchus mykiss alevins

Krumschnabel, Gerhard; Lackner, Reinhard

doi:10.1016/0300-9629(93)90154-v

Cited by 25 publications

(19 citation statements)

References 23 publications

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“…Brain generally requires only glucose for energy purpose and reduced glucose flow into the brain at higher salinity might be due to the compensatory mechanism developed by the species to combat stress. During stress, demand of glucose in different tissues is higher in order to supply the energy for osmoregulatory mechanisms (Krumschnabel and Lackner 1993;Plaut 1998), whereupon glyconeogenesis even increases (Jürss and Bittorf 1990). However, reduced glucose supply to the brain might have detrimental effect on brain tissue.…”

Section: Discussionmentioning

confidence: 99%

Response of a freshwater air-breathing fish, Clarias batrachus to salinity stress: an experimental case for their farming in brackishwater areas in Andaman, India

et al. 2012

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The study was conducted to assess the effects of salinity on growth and biochemical composition of freshwater catfish, Clarias batrachus. A static nonrenewable acute toxicity bioassay test was conducted and LC 50 of salinity for 96-h exposure to the fingerling (14.5 cm) was 12.52 %. Based on these results, two sublethal salinity levels, viz. 4 and 8 % were selected to study the long-term effects of salinity on C. batrachus for a period of 90 days. From the study, it was found that growth and survival rate were less in saline water (4 and 8 %). Maximum growth and survival were recorded in freshwater (0 % salinity) and subsequently at 4 and 8 %. To assess the biochemical alteration, few important biomarkers were estimated. At the end of 90 days rearing period, glucose level in the brain and blood of C. batrachus was found to decrease with salinity. The level of liver and muscle glycogen in the fish reared at 4 % was lower than that of control. Ascorbic acid in all organs under study was found to decrease with increasing salinity, which was attributed to stress mitigation effect of vitamin C. Acetylcholine esterase (AchE) activity recorded a gradual decrease with increasing salinity. Metabolic enzymes, alkaline phosphatase (ALP) activity and adenosine triphosphosphtase (ATPase) activity also reduced both in liver and muscle tissues with increasing salinity. From the present investigation, it can be concluded that exposure to higher salinity significantly (P \ 0.01) affects the growth and physiological response of Clarias batrachus.

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Section: Discussionmentioning

confidence: 99%

Response of a freshwater air-breathing fish, Clarias batrachus to salinity stress: an experimental case for their farming in brackishwater areas in Andaman, India

et al. 2012

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“…The findings for ATP in the present study, however, did not support this. The lack of ATP depletion following exercise was also shown for larval rainbow trout (Krumschnabel & Lackner, 1993) and larval marine lamprey Petromyzon marinus L. (Wilkie et al ., 2001), and suggests that small fishes can supply tissues with adequate ATP through aerobic processes ( i.e . production and utilization of ATP is not uncoupled).…”

Section: Discussionmentioning

confidence: 99%

“…Despite these important size‐related exercise effects, the metabolic aspects of swimming in very small fishes (<1 g) have not been adequately addressed in the literature. Earlier studies have shown that the physiological response to exercise in fish larvae contrasts with that of juveniles and adults (Wieser et al ., 1986; Krumschnabel & Lackner, 1993). Recent enzymatic data and theoretical evidence suggests that very small fishes ( i.e .…”

Section: Introductionmentioning

confidence: 99%

Metabolic recovery in Atlantic salmon fry and parr following forced activity

Wakefield

Cunjak

Kieffer

2004

Journal of Fish Biology

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Atlantic salmon Salmo salar fry and parr were subjected to 5 min of forced activity and the subsequent changes in oxygen consumption and ammonia excretion rates were evaluated over a 24 h period. In a second experiment, individual Atlantic salmon fry and parr were freeze-clamped in liquid nitrogen, before, immediately following a 5 min activity period, or after periods of recovery up to 2 h. Samples were analysed for whole body phosphocreatine (PCr), ATP and lactate. Five minutes of forced activity resulted in significant increases in both oxygen consumption and ammonia excretion rates. Changes in the oxygen consumption rates were greater in the parr compared with the fry. In contrast, the post-exercise ammonia excretion rates were nearly twice as high for the fry compared with the parr. Exercise also caused a marked decrease in PCr levels (c. 47 and 65% in fry and parr, respectively), no change in ATP levels and a significant increase in lactate levels in Atlantic salmon fry and parr. Recovery of PCr occurred quickly (between 15 and 30 min) in fry and parr. Although the post-activity levels of lactate were lower in fry (c. 3 mmol g À1 ) compared with parr (c. 14 mmol g À1 ), lactate levels returned to control levels within 60 min in fry, but it took >2 h for this metabolite to recover in parr. Compared with parr, these findings show that Atlantic salmon fry possess a reduced anaerobic capacity, and these results are consistent with the theoretical and experimental evidence that smaller fish support burst swimming through aerobic processes. # 2004 The Fisheries Society of the British Isles

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“…Similarly, we found such rise in our results. Previous studies of this issue are contradictory, showing both a rise (Assem and Hanke, 1979;Bashamohideen and Parvatheswararao, 1972) and a fall (Krumschnabel and Lackner, 1993;Soengas et al, 1991) in glucose value during seawater adaptation. There appears to be a high glucose demand in order to supply the energy by osmoregulatory mechanisms (Krumschnabel and Lackner, 1993;Plaut, 1998), whereupon glyconeogenesis even increases (Jürss and Bittorf, 1990).…”

Section: Discussionmentioning

confidence: 78%

“…Previous studies of this issue are contradictory, showing both a rise (Assem and Hanke, 1979;Bashamohideen and Parvatheswararao, 1972) and a fall (Krumschnabel and Lackner, 1993;Soengas et al, 1991) in glucose value during seawater adaptation. There appears to be a high glucose demand in order to supply the energy by osmoregulatory mechanisms (Krumschnabel and Lackner, 1993;Plaut, 1998), whereupon glyconeogenesis even increases (Jürss and Bittorf, 1990). The greater use of glucose could mask the plasma glucose increase natural environments, juvenile ship sturgeon, A. nudiventris, in migratory populations could be able to migrate and adjust successfully into brackish water with a salinity of up to 8‰ without any short-term hematological stress responses.…”

Section: Discussionmentioning

confidence: 78%

Effects of Salinity Changes on Hematological Responses in Juvenile Ship Sturgeon Acipenser nudiventris

Shahkar¹,

Daejung²,

Mohseni³

et al. 2015

Fisheries and aquatic sciences

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A 10-day trial was conducted to evaluate the salinity tolerance and hematological responses of juvenile ship sturgeon Acipenser nudiventris under different salinity levels. A total of 240 fish averaging 6.2 ± 0.13 g (mean ± SD) were randomly distributed into 12 tanks in groups of 20, and each tank was then randomly assigned to one of three replicates of four different salinities at 0, 4, 8 and 12‰. At the end of 10 days of experimental period, plasma protein value of fish exposed to 0‰ and 4‰ salinities was significantly higher than those of fish exposed to 8‰ and 12‰ salinities (P < 0.05). Significantly higher values for plasma cortisol and glucose were obtained in fish exposed to 12‰ salinity compared to the fish exposed to 0‰ and 4‰ salinities (P < 0.05). Plasma potassium and sodium values increased significantly by increment of salinity levels (P < 0.05). Therefore, these results indicated that in natural environments, juvenile ship sturgeon, A. nudiventris in migratory populations could be able to migrate and adjust successfully into brackish water with a salinity of up to 8‰ without any short-term hematological stress responses.

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Stress responses in rainbow trout Oncorhynchus mykiss alevins

Cited by 25 publications

References 23 publications

Response of a freshwater air-breathing fish, Clarias batrachus to salinity stress: an experimental case for their farming in brackishwater areas in Andaman, India

Response of a freshwater air-breathing fish, Clarias batrachus to salinity stress: an experimental case for their farming in brackishwater areas in Andaman, India

Metabolic recovery in Atlantic salmon fry and parr following forced activity

Effects of Salinity Changes on Hematological Responses in Juvenile Ship Sturgeon Acipenser nudiventris

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