Differences in intestinal electrophysiological parameters and nutrient transport rates between eels (Anguilla anguilla) at yellow and silver stages

Lionetto, Maria Giulia; Maffia, Michele; Vignes, Fabio; Storelli, Carlo; Schettino, T.

doi:10.1002/(sici)1097-010x(19960815)275:6<399::aid-jez1>3.0.co;2-j

Cited by 14 publications

(7 citation statements)

References 17 publications

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“…Wild mature eels have not been captured from the sea; therefore, it is not known if eels feed after migration to the sea. In the European eel, however, degeneration of the alimentary tract at the silver eel stage has been reported 30,31 . In Japan, since the larvae during early developmental stages can not be obtained from the wild, glass eels migrating into the estuaries are collected as seed and cultured in fish farms.…”

Section: Discussionmentioning

confidence: 99%

“…In the European eel, however, degeneration of the alimentary tract at the silver eel stage has been reported. 30,31 In Japan, since the larvae during early developmental stages can not be obtained from the wild, glass eels migrating into the estuaries are collected as seed and cultured in fish farms. However, the cultured eels do not mature under normal aquaculture conditions: the ovaries remain at the previtellogenic stages.…”

Section: Fisheries Sciencementioning

confidence: 99%

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Lipid content and fatty acid composition of muscle, liver, ovary and eggs of captive-reared and wild silver Japanese eel Anguilla japonica during artificial maturation

et al. 2008

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Changes in lipid content and fatty acid composition of muscle, liver and ovary of captive-reared and wild silver Japanese eel Anguilla japonica were examined during artificial maturation induced by salmon pituitary homogenate (SPH) injections. Although the relative levels of n-3 and n-6 highly unsaturated fatty acids (HUFA) in liver and ovary were higher than in muscle in both captive and wild silver eels before SPH injection, these tended to decrease with maturation. The relative levels of n-6 HUFA in muscle, liver, ovary and eggs of wild silver eels were remarkably higher than those in captive eels. Therefore, we attempted to alter the ratio of n-6 HUFA in eggs by feeding eels a diet supplemented with linoleic acid-rich plant oil. Although the percentage of n-6 polyunsaturated fatty acids to total fatty acids in eggs of eels fed the supplemented diet was similar to wild silver eels, the percentage of n-6 HUFA remained remarkably lower than in wild silver eels. Hence, it appears that the supplemented diet affected the fatty acid composition of eggs, but did not result in much conversion of linoleic acid to its higher homologs in eels.

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Section: Discussionmentioning

confidence: 99%

Section: Fisheries Sciencementioning

confidence: 99%

Lipid content and fatty acid composition of muscle, liver, ovary and eggs of captive-reared and wild silver Japanese eel Anguilla japonica during artificial maturation

et al. 2008

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“…Previous studies have suggested that as eels progress through oogenesis, the role of the intestine changes from nutrient absorption to osmoregulation (38,43), in association with increased salinities that are encountered in the oceanic environment during migration; indeed, the intestine is considered "an essential organ in marine osmoregulation" (p. 139 in Ref. 57).…”

Section: R939mentioning

confidence: 99%

Triacylglyceride physiology in the short-finned eel,Anguilla australis—changes throughout early oogenesis

Damsteegt

Falahatimarvast

McCormick

et al. 2015

American Journal of Physiology-Regulatory, Integrative and Comp

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During certain stages in an animal's life cycle, energy requirements may exceed energy intake from the diet. The spawning migration of temperate eels is a textbook example of negative energy balance, forcing these fish to rely on stored fats (triacylglycerides) to provide their muscles with energy for swimming and their growing oocytes with the nutrients needed to develop and support healthy offspring. We predicted broad implications of this great need for endogenous triacylglycerides in terms of their packaging, transport, and ovarian uptake. To test this, serum lipid concentrations and transcript abundances of intestinal and hepatic triacylglyceride packagers and ovarian triacylglyceride modifiers and receivers were investigated throughout previtellogenesis (feeding phase) and into early vitellogenesis (fasting phase) in short-finned eels. A switch from exogenous to endogenous triacylglyceride packaging was seen as the liver upregulated transcript levels of apolipoprotein B and microsomal triacylglyceride transport protein and downregulated those of apolipoprotein E and lipoprotein lipase. In the intestine, the reverse response was observed. Furthermore, ovarian transcript abundances of triacylglyceride modifiers and receivers increased (apolipoprotein E, lipoprotein lipase, and vitellogenin receptor), indicative of increased triacylglyceride uptake during previtellogenesis. We propose that increased hepatic apolipoprotein B production is a conserved vertebrate response to prolonged periods of negative energy balance.

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“…Moreover, in the same studies [50,51] the exposure to the alga was also demonstrated to induce a) alteration of the activity of the Na + -K + -ATPase, which is responsible for the electrochemical gradient across the plasma membrane and it is critical for the osmotic balance of the cell, the resting membrane potential, and the excitable properties of muscle and nerve cells [54][55][56][57][58], b) neurotoxic effects, documented by acetylcholinesterase inhibition, and c) changes in the morphology of gonads. The observed alterations may cause detrimental health status and altered behaviour in the fish, potentially preventing the reproductive success of fish population [51].…”

Section: Biomarkers As Useful Tool For Detecting Subtle Effects Of Bimentioning

confidence: 86%

Biomarker Approach in Marine Monitoring and Assessment: New Insights and Perspectives

Schettino¹,

Caricato²,

Calisi³

et al. 2012

TOENVIRJ

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Abstract:The measurement of cellular and sub cellular responses to chemical contaminants (referred to as biomarkers) in living organisms represents a recent tool in environmental monitoring. It answers to the need to detect exposure and to assess effects of pollutants on biota. Biomarkers have recently become an integral component of environmental monitoring programmes of marine environments in several countries as a supplement to the commonly used contaminant monitoring. The review reports and analyzes new insights and perspectives in the biomarker approach, including its recent application to the detection of the impact of biological pollution in marine environment.

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Differences in intestinal electrophysiological parameters and nutrient transport rates between eels (Anguilla anguilla) at yellow and silver stages

Cited by 14 publications

References 17 publications

Lipid content and fatty acid composition of muscle, liver, ovary and eggs of captive-reared and wild silver Japanese eel Anguilla japonica during artificial maturation

Lipid content and fatty acid composition of muscle, liver, ovary and eggs of captive-reared and wild silver Japanese eel Anguilla japonica during artificial maturation

Triacylglyceride physiology in the short-finned eel,Anguilla australis—changes throughout early oogenesis

Biomarker Approach in Marine Monitoring and Assessment: New Insights and Perspectives

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