LeHavreV1, Main, Exploration, bibRecord, 000950

Endocrine effects of the tapeworm Ligula intestinalis in its teleost host, the roach ( Rutilus rutilus).

Identifieur interne : 000950 ( Main/Exploration ); précédent : 000949; suivant : 000951

Endocrine effects of the tapeworm Ligula intestinalis in its teleost host, the roach ( Rutilus rutilus).

Auteurs : P. Geraudie [France] ; C. Boulange-Lecomte ; M. Gerbron ; N. Hinfray ; F. Brion ; C. Minier

Source :

Parasitology [ 1469-8161 ] ; 2010.

RBID : pubmed:19961656

English descriptors

KwdEn :
- Animals, Aromatase (metabolism), Brain (enzymology), Cestoda (physiology), Cyprinidae (blood), Cyprinidae (parasitology), Cyprinidae (physiology), Endocrine System (parasitology), Female, Host-Parasite Interactions, Male, Population Density, Reproduction, Steroids (blood), Vitellogenins (blood).
MESH :
- chemical , blood : Steroids, Vitellogenins.
- chemical , metabolism : Aromatase.
- blood : Cyprinidae.
- enzymology : Brain.
- parasitology : Cyprinidae, Endocrine System.
- physiology : Cestoda, Cyprinidae.
- Animals, Female, Host-Parasite Interactions, Male, Population Density, Reproduction.

Abstract

The effects of parasite infection by the cestode Ligula intestinalis on the reproductive function and endocrine system of wild roach Rutilus rutilus were evaluated. Gonad maturation, plasma vitellogenin, plasma steroid concentrations (i.e. progesterone, 11-keto-testosterone and 17-beta-estradiol) and brain aromatase activity were investigated in relation with parasitization. A low prevalence (8%) of ligulosed roach and a moderate impact of parasitization (mean parasitization index of 8.8%) were found in the studied population. Inhibition of gonad maturation generally resulted from infestation but 5% of the ligulosed roach nevertheless reached maturity. Main sex steroid plasma content was depleted in both genders. Male 11-keto-testosterone, female 17-beta-estradiol and progesterone plasma concentrations of both genders were, respectively, 27, 5 and 3 times lower in ligulosed fish when compared to their non-infected counterparts. Progesterone levels were negatively correlated with the parasitization index in females. Brain aromatase activity of infected roach was reduced to 50% of that of the non-infected fish. These results demonstrate significant negative effects on the reproductive function of wild roach infected by the tapeworm L. intestinalis collected from a site with low contamination.

DOI: 10.1017/S003118200999151X
PubMed: 19961656

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en">The effects of parasite infection by the cestode Ligula intestinalis on the reproductive function and endocrine system of wild roach Rutilus rutilus were evaluated. Gonad maturation, plasma vitellogenin, plasma steroid concentrations (i.e. progesterone, 11-keto-testosterone and 17-beta-estradiol) and brain aromatase activity were investigated in relation with parasitization. A low prevalence (8%) of ligulosed roach and a moderate impact of parasitization (mean parasitization index of 8.8%) were found in the studied population. Inhibition of gonad maturation generally resulted from infestation but 5% of the ligulosed roach nevertheless reached maturity. Main sex steroid plasma content was depleted in both genders. Male 11-keto-testosterone, female 17-beta-estradiol and progesterone plasma concentrations of both genders were, respectively, 27, 5 and 3 times lower in ligulosed fish when compared to their non-infected counterparts. Progesterone levels were negatively correlated with the parasitization index in females. Brain aromatase activity of infected roach was reduced to 50% of that of the non-infected fish. These results demonstrate significant negative effects on the reproductive function of wild roach infected by the tapeworm L. intestinalis collected from a site with low contamination.</div>
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Endocrine effects of the tapeworm Ligula intestinalis in its teleost host, the roach ( Rutilus rutilus).

Endocrine effects of the tapeworm Ligula intestinalis in its teleost host, the roach ( Rutilus rutilus).

Source :

English descriptors

Abstract

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

Le document en format XML

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