The combined effect of environmental thermal drop and isotonicity on metabolic stores of the teleost, Oreochromis niloticus

Assem, H.; Hassan, Bayan A.; Khalifa, A.; Salhia, M. El; Basomy, A. Al; Sayed, M. El

doi:10.1016/j.ejar.2013.07.001

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…Regarding the hematological analysis, the RBC count, Hgb concentration, and HCT percentage were lower in the shaded ponds than in the non-shaded counterparts, with RBC count and Hgb being statistically significant, confirming the results of the study by Panase and colleagues [43] in which the RBC count, Hgb concentration, and HCT were decreased as the temperature decreased. Moreover, the result showing less hematological disturbance proves the importance of the pre-acclimation phase improving fish's tolerance to change in environmental condition [44]. Higher temperature and lower oxygen concentration are consistent with the unshaded setup of the present study.…”

Section: Discussionsupporting

confidence: 90%

Potential Influence of Shading in Freshwater Ponds on the Water Quality Parameters and the Hematological and Biochemical Profiles of Nile tilapia (Oreochromis niloticus Linnaeus, 1758)

Dayrit

Cruz

Rodkhum

et al. 2023

Fishes

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Nile tilapia is a high-demand commodity in most developing countries including the Philippines, but its production is hampered by fluctuating water temperature (WT) and dissolved oxygen (DO) concentrations, which are mostly influenced by temperature warming. Net shading has been demonstrated to reduce pond temperature and increase the rate of spawning in cultured tilapia. The current study aimed to investigate the potential effects of shading on the water quality parameters, blood indices, and serum biochemical profiles of cultured Nile tilapia. Fish were collected from unshaded (control) and shaded (experimental) ponds in three breeding cycles. WT and DO concentrations were measured, while hematological and biochemical analyses were performed. The results showed that the average WT was considerably decreased in the shaded pond with no significant difference in the DO concentrations. Red blood cells, hemoglobin, and lymphocyte counts were significantly lower in fish raised in shaded ponds, although mean corpuscular volume and neutrophil counts were significantly higher. Likewise, Chole, TP, and Alb values were significantly affected by the interaction of cycle and shading setup. Cortisol, Glb, K+, Cl−, Mg2+, and TCa values showed significant differences and were only affected by the cycle. Similarly, AST and ALT values showed significant differences and were affected by both cycle and shading setup. Water quality parameters (WT and DO), hematological blood indices, and serum biochemical variables were correlated positively with each other. In brief, prior data imply that net shading can reduce WT in aquaculture ponds, reduce stress in Nile tilapia, and lessen the consequences of temperature warming on species production.

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Section: Discussionsupporting

confidence: 90%

Potential Influence of Shading in Freshwater Ponds on the Water Quality Parameters and the Hematological and Biochemical Profiles of Nile tilapia (Oreochromis niloticus Linnaeus, 1758)

Dayrit

Cruz

Rodkhum

et al. 2023

Fishes

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“…(2013) investigated whether isotonic holding conditions could decrease the energetic burden of osmoregulation, thereby freeing up available energy for other essential needs. Nile tilapia that were acclimatized to fresh water and abruptly exposed to (and kept in) colder water exhibited a decrease in haemoglobin by 3 h after the acute temperature change, returning to normal levels by 6 h post‐cold shock, as well as a decrease in muscle lipid content by 3 h post‐exposure that remained until 168 h post‐exposure, whereas no such changes were observed in fish acclimatized to isotonic water (Assem et al ., 2013). Using a similar protocol, Hassan et al .…”

Section: Cold Shock and Fisheriesmentioning

confidence: 99%

“…Freshwater acclimatization in milkfish also led to increased glycogenolysis in the liver in attempts to meet the energy demands of cold conditions, whereas milkfish acclimatized in sea water were likely more resilient to chronic cold stress via an apparent shift towards lipid metabolism (Chang et al, 2018). Assem et al (2013) investigated whether isotonic holding conditions could decrease the energetic burden of osmoregulation, thereby freeing up available energy for other essential needs. Nile tilapia that were acclimatized to fresh water and abruptly exposed to (and kept in) colder water exhibited a decrease in haemoglobin by 3 h after the acute temperature change, returning to normal levels by 6 h post-cold shock, as well as a decrease in muscle lipid content by 3 h post-exposure that remained until 168 h post-exposure, whereas no such changes were observed in fish acclimatized to isotonic water (Assem et al, 2013).…”

Section: Aquaculture and Dietary Mitigation Of Winter Stress Syndromementioning

confidence: 99%

An updated review of cold shock and cold stress in fish

Reid

Patrick²,

Rytwinski

et al. 2022

Journal of Fish Biology

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Temperature is critical in regulating virtually all biological functions in fish. Low temperature stress (cold shock/stress) is an often-overlooked challenge that many fish face as a result of both natural events and anthropogenic activities. In this study, we present an updated review of the cold shock literature based on a comprehensive literature search, following an initial review on the subject by M.R. Donaldson and colleagues, published in a 2008 volume of this journal. We focus on how knowledge on cold shock and fish has evolved over the past decade, describing advances in the understanding of the generalized stress response in fish under cold stress, what metrics may be used to quantify cold stress and what knowledge gaps remain to be addressed in future research. We also describe the relevance of cold shock as it pertains to environmental managers, policymakers and industry professionals, including practical applications of cold shock. Although substantial progress has been made in addressing some of the knowledge gaps identified a decade ago, other topics (e.g., population-level effects and interactions between primary, secondary and tertiary stress responses) have received little or no attention despite their significance to fish biology and thermal stress. Approaches using combinations of primary, secondary and tertiary stress responses are crucial as a research priority to better understand the mechanisms underlying cold shock responses, from short-term physiological changes to individual-and population-level effects, thereby providing researchers with better means of quantifying cold shock in laboratory and field settings.

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“…Since fish blood analysis is used in diagnosis, assessment of its physiological state and the effect of hazardous substances, (Assem et al, 2013), the objective of the present study was to investigate the potential use of some hematological and biochemical changes in Nile tilapia, (O. niloticus L.). The evaluation of fish responses to two sublethal concentrations of hexavalent chromium was studied to give information concerning not only the chemical actions but also the potential consequences of exposure and could serve as more effective tool in ecological monitoring system.…”

Section: Introductionmentioning

confidence: 99%

Multiple biomarkers response in Nile tilapia, Oreochromis niloticus (L.) exposed to sublethal concentrations of hexavalent chromium

Elsaeidy

Assem

Edrees

et al. 2016

Egypt. J. of Aquatic Biolo. and Fish.

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The effect of two sublethal concentrations (15, 30 mg/l) of Cr 6+ on Nile tilapia, Oreochromis niloticus has been studied using some hematological and biochemical parameters aiming to evaluate their possible potential use as biomarkers of stress and/or defense. Hemoglobin content decreased throughout the experiment period, compared to the control. Moreover, the plasma glucose content and uric acid increased in both Cr 6+ concentrations. Plasma urea decreased during the first 24 hr of exposure, then it increased, thereafter decreased and finally fish recovered. Also, the brain AChE of the lower concentration showed significant fluctuations starting with inhibition of the enzyme then activation and final tendency to recover, while the higher concentration showed a significant increase throughout the whole experimental period with no sign of recovery. Plasma AChE has been inhibited and no sign of recovery was detected. Gill Na +-K +-ATPase specific activity remained unchanged in fish exposed to both Cr 6+ concentrations during the whole experimental time. Liver metallothionein (MT) content increased in both fish treated with Cr 6+ concentrations. The present results indicated that blood Hb, plasma glucose followed by brain AChE are more sensitive indicators of general stress. However, MT, to a lesser extent, may be considered a valuable biomarker of defense. Finally, plasma AChE may also be considered as a biomarker of defense.

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The combined effect of environmental thermal drop and isotonicity on metabolic stores of the teleost, Oreochromis niloticus

Cited by 5 publications

References 18 publications

Potential Influence of Shading in Freshwater Ponds on the Water Quality Parameters and the Hematological and Biochemical Profiles of Nile tilapia (Oreochromis niloticus Linnaeus, 1758)

Potential Influence of Shading in Freshwater Ponds on the Water Quality Parameters and the Hematological and Biochemical Profiles of Nile tilapia (Oreochromis niloticus Linnaeus, 1758)

An updated review of cold shock and cold stress in fish

Multiple biomarkers response in Nile tilapia, Oreochromis niloticus (L.) exposed to sublethal concentrations of hexavalent chromium

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