LotaV3, Main, Exploration, bibRecord, 000037

Females exceed males in mercury concentrations of burbot Lota lota.

Identifieur interne : 000037 ( Main/Exploration ); précédent : 000036; suivant : 000038

Females exceed males in mercury concentrations of burbot Lota lota.

Auteurs : Charles P. Madenjian ; Martin A. Stapanian ; Peter A. Cott ; David P. Krabbenhoft ; William H. Edwards ; Lynn M. Ogilvie ; Justin G. Mychek-Londer ; John F. Dewild

Source :

Archives of environmental contamination and toxicology [ 1432-0703 ] ; 2015.

RBID : pubmed:25628029

Descripteurs français

KwdFr :
- Animaux (MeSH), Canada (MeSH), Facteurs sexuels (MeSH), Femelle (MeSH), Gadiformes (métabolisme), Gonades (MeSH), Mercure (métabolisme), Mâle (MeSH), Polluants chimiques de l'eau (analyse), Polluants chimiques de l'eau (métabolisme), Polychlorobiphényles (métabolisme), Surveillance de l'environnement (MeSH).
MESH :
- analyse : Polluants chimiques de l'eau.
- métabolisme : Gadiformes, Mercure, Polluants chimiques de l'eau, Polychlorobiphényles.
- Animaux, Canada, Facteurs sexuels, Femelle, Gonades, Mâle, Surveillance de l'environnement.
Wicri :
- geographic : Canada.

English descriptors

KwdEn :
- Animals (MeSH), Canada (MeSH), Environmental Monitoring (MeSH), Female (MeSH), Gadiformes (metabolism), Gonads (MeSH), Male (MeSH), Mercury (metabolism), Polychlorinated Biphenyls (metabolism), Sex Factors (MeSH), Water Pollutants, Chemical (analysis), Water Pollutants, Chemical (metabolism).
MESH :
- chemical , analysis : Water Pollutants, Chemical.
- chemical , metabolism : Mercury, Polychlorinated Biphenyls, Water Pollutants, Chemical.
- geographic : Canada.
- metabolism : Gadiformes.
- Animals, Environmental Monitoring, Female, Gonads, Male, Sex Factors.

Abstract

Examination of differences in contaminant concentrations between the sexes of fish, across several fish species, may show clues for important behavioral and physiological differences between the sexes. We determined whole-fish total mercury (Hg) concentrations of 25 male and 25 female adult burbot Lota lota captured in Lake Erie during summer 2011 and of 14 male and 18 female adult burbot captured in Great Slave Lake (Northwest Territories, Canada) during winter 2013. On average, females had 22 % greater Hg concentrations than males. This difference was probably not due to a greater feeding rate by females because results from previous studies based on polychlorinated biphenyl determinations of these same burbot indicated that males fed at a substantially greater rate than females. Based on our determinations of Hg concentrations in the gonads and somatic tissue of 5 ripe females and 5 ripe males, this difference was not attributable to changes in Hg concentration immediately after spawning due to the release of gametes. Furthermore, bioenergetics modeling results from previous studies indicated that growth dilution would not explain any portion of this observed difference in Hg concentrations between the sexes. We therefore conclude that this difference was most likely due to a substantially faster rate of Hg elimination by males compared with females. Male burbot exhibit among the greatest gonadosomatic indices (GSIs) of all male fishes, with their testes accounting for between 10 and 15 % of their body weight when the fish are in ripe condition. Androgens have been linked to enhanced Hg-elimination rates in other vertebrates. If androgen production is positively related to GSI, then male burbot would be expected to have among the greatest androgen levels of all fishes. Thus, we hypothesize that male burbot eliminate Hg from their bodies faster than most other male fishes and that this explains the greater Hg concentration in females compared with males.

DOI: 10.1007/s00244-015-0131-1
PubMed: 25628029

Affiliations:

Le document en format XML

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<term>Female (MeSH)</term>
<term>Gadiformes (metabolism)</term>
<term>Gonads (MeSH)</term>
<term>Male (MeSH)</term>
<term>Mercury (metabolism)</term>
<term>Polychlorinated Biphenyls (metabolism)</term>
<term>Sex Factors (MeSH)</term>
<term>Water Pollutants, Chemical (analysis)</term>
<term>Water Pollutants, Chemical (metabolism)</term>
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<term>Canada (MeSH)</term>
<term>Facteurs sexuels (MeSH)</term>
<term>Femelle (MeSH)</term>
<term>Gadiformes (métabolisme)</term>
<term>Gonades (MeSH)</term>
<term>Mercure (métabolisme)</term>
<term>Mâle (MeSH)</term>
<term>Polluants chimiques de l'eau (analyse)</term>
<term>Polluants chimiques de l'eau (métabolisme)</term>
<term>Polychlorobiphényles (métabolisme)</term>
<term>Surveillance de l'environnement (MeSH)</term>
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<term>Polluants chimiques de l'eau</term>
<term>Polychlorobiphényles</term>
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<term>Environmental Monitoring</term>
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<term>Sex Factors</term>
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<front><div type="abstract" xml:lang="en">Examination of differences in contaminant concentrations between the sexes of fish, across several fish species, may show clues for important behavioral and physiological differences between the sexes. We determined whole-fish total mercury (Hg) concentrations of 25 male and 25 female adult burbot Lota lota captured in Lake Erie during summer 2011 and of 14 male and 18 female adult burbot captured in Great Slave Lake (Northwest Territories, Canada) during winter 2013. On average, females had 22 % greater Hg concentrations than males. This difference was probably not due to a greater feeding rate by females because results from previous studies based on polychlorinated biphenyl determinations of these same burbot indicated that males fed at a substantially greater rate than females. Based on our determinations of Hg concentrations in the gonads and somatic tissue of 5 ripe females and 5 ripe males, this difference was not attributable to changes in Hg concentration immediately after spawning due to the release of gametes. Furthermore, bioenergetics modeling results from previous studies indicated that growth dilution would not explain any portion of this observed difference in Hg concentrations between the sexes. We therefore conclude that this difference was most likely due to a substantially faster rate of Hg elimination by males compared with females. Male burbot exhibit among the greatest gonadosomatic indices (GSIs) of all male fishes, with their testes accounting for between 10 and 15 % of their body weight when the fish are in ripe condition. Androgens have been linked to enhanced Hg-elimination rates in other vertebrates. If androgen production is positively related to GSI, then male burbot would be expected to have among the greatest androgen levels of all fishes. Thus, we hypothesize that male burbot eliminate Hg from their bodies faster than most other male fishes and that this explains the greater Hg concentration in females compared with males.</div>
</front>
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<affiliations><list></list>
<tree><noCountry><name sortKey="Cott, Peter A" sort="Cott, Peter A" uniqKey="Cott P" first="Peter A" last="Cott">Peter A. Cott</name>
<name sortKey="Dewild, John F" sort="Dewild, John F" uniqKey="Dewild J" first="John F" last="Dewild">John F. Dewild</name>
<name sortKey="Edwards, William H" sort="Edwards, William H" uniqKey="Edwards W" first="William H" last="Edwards">William H. Edwards</name>
<name sortKey="Krabbenhoft, David P" sort="Krabbenhoft, David P" uniqKey="Krabbenhoft D" first="David P" last="Krabbenhoft">David P. Krabbenhoft</name>
<name sortKey="Madenjian, Charles P" sort="Madenjian, Charles P" uniqKey="Madenjian C" first="Charles P" last="Madenjian">Charles P. Madenjian</name>
<name sortKey="Mychek Londer, Justin G" sort="Mychek Londer, Justin G" uniqKey="Mychek Londer J" first="Justin G" last="Mychek-Londer">Justin G. Mychek-Londer</name>
<name sortKey="Ogilvie, Lynn M" sort="Ogilvie, Lynn M" uniqKey="Ogilvie L" first="Lynn M" last="Ogilvie">Lynn M. Ogilvie</name>
<name sortKey="Stapanian, Martin A" sort="Stapanian, Martin A" uniqKey="Stapanian M" first="Martin A" last="Stapanian">Martin A. Stapanian</name>
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Serveur d'exploration Lota lota

Females exceed males in mercury concentrations of burbot Lota lota.

Females exceed males in mercury concentrations of burbot Lota lota.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki

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