In conjunction with habitat loss and overfishing, pollution and parasitism are believed to be relevant causes of collapse of Anguilla, as these can affect eel swimming ability and the development of gonads and embryos. The present study investigated Persistent Organic Pollutant (POP) concentrations, infection levels of Anguillicoloides crassus, lipid content and gonad abnormalities in eels sampled in 2007–2008 in three Italian water bodies (Caprolace Lake, Lesina Lagoon and Tevere River) that vary in salinity, trophic condition, contamination level and fishing pressure. Our analysis revealed that low-to-moderate levels of contamination and parasitism were not associated with gonad abnormalities in Caprolace Lake and Lesina Lagoon. On the contrary, POP concentrations and abundances of swim bladder nematodes were remarkably high in eels from the heavily urbanized Tevere River and were associated with significant gonad and swim bladder alterations. Contamination and infestation levels were so high to potentially impair spawner successful migration and reproduction. POP concentrations in Tevere eels also exceeded levels considered safe for food consumption. Though marginally contaminated, eels from the oligotrophic Caprolace Lake were in critical health condition: their lipid reserve was so low as to be considered insufficient to sustain the energetic costs of the transoceanic migration. Lesina eel stock was the only one displaying relatively good quality but here spawner abundance is likely limited by overfishing. Our results suggest that multiple stressors may potentially affect eel reproductive success. More definitive studies are needed to assess whether health effects caused by these multiple stressors are additive, compensatory or synergistic.

Quadroni, S., Galassi, S., Capoccioni, F., Ciccotti, E., Grandi, G., De Leo, G., et al. (2013). Contamination, parasitism and condition of Anguilla anguilla in three Italian stocks. ECOTOXICOLOGY, 22(1), 94-108 [10.1007/s10646-012-1006-0].

Contamination, parasitism and condition of Anguilla anguilla in three Italian stocks

CAPOCCIONI, FABRIZIO;CICCOTTI, ELEONORA;
2013-01-01

Abstract

In conjunction with habitat loss and overfishing, pollution and parasitism are believed to be relevant causes of collapse of Anguilla, as these can affect eel swimming ability and the development of gonads and embryos. The present study investigated Persistent Organic Pollutant (POP) concentrations, infection levels of Anguillicoloides crassus, lipid content and gonad abnormalities in eels sampled in 2007–2008 in three Italian water bodies (Caprolace Lake, Lesina Lagoon and Tevere River) that vary in salinity, trophic condition, contamination level and fishing pressure. Our analysis revealed that low-to-moderate levels of contamination and parasitism were not associated with gonad abnormalities in Caprolace Lake and Lesina Lagoon. On the contrary, POP concentrations and abundances of swim bladder nematodes were remarkably high in eels from the heavily urbanized Tevere River and were associated with significant gonad and swim bladder alterations. Contamination and infestation levels were so high to potentially impair spawner successful migration and reproduction. POP concentrations in Tevere eels also exceeded levels considered safe for food consumption. Though marginally contaminated, eels from the oligotrophic Caprolace Lake were in critical health condition: their lipid reserve was so low as to be considered insufficient to sustain the energetic costs of the transoceanic migration. Lesina eel stock was the only one displaying relatively good quality but here spawner abundance is likely limited by overfishing. Our results suggest that multiple stressors may potentially affect eel reproductive success. More definitive studies are needed to assess whether health effects caused by these multiple stressors are additive, compensatory or synergistic.
gen-2013
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIO/07 - ECOLOGIA
English
Con Impact Factor ISI
Author keywords Anguilla anguilla Ecological and sanitary risk Gonad alterations Lipid content Parasitism POP bioaccumulation
WOS KeyWords Plus:PERSISTENT ORGANIC POLLUTANTS; EUROPEAN EEL; CRASSUS NEMATODA; HEAVY-METALS; SILVER EELS; ORGANOCHLORINE POLLUTANTS; GONAD DIFFERENTIATION; SEX-DIFFERENTIATION; TEMPORAL TRENDS; COASTAL LAGOONS
SCOPUS Indexed keywords EMTREE drug terms: lipid organochlorine pesticide polychlorinated biphenyl GEOBASE Subject Index: abnormality abundance bioaccumulation ecological impact embryonic development fish habitat loss lipid, nematode, organic pollutant, overfishing, parasitism, pollution effect, risk assessment, swimming behavior EMTREE medical terms: Anguilla anguilla, Anguillicoloides crassus, animal tissue, article bladder, body fat concentration, (parameters) controlled study, disease association, eel female, fishing, food contamination, gonad, Italy, lagoon, lake, male, maximum allowable concentration, migration, nematode, non humanparasitism, persistent organic pollutant, pollutant, priority journal, reproduction, river, salinity, tissue level, urban area, water contamination MeSH: Anguilla, Animal Migration, Animals, Female, Fish Diseases, Gonads, Italy, Lipids, Male, Nematoda, Nematode Infections, Water Pollutants, Chemical Regional Index: Caprolace Lake, Foggia, Italy,Latina, Lazio, Lesina Lagoon, Puglia, Tiber River Species Index: Anguilla anguilla, Lesina, Nematoda
Research Areas:Environmental Sciences & Ecology; Toxicology Web of Science Categories:Ecology; Environmental Sciences; Toxicology Metrics in Scopus 12 Citations 70th Percentile 1.45 Field-Weighted Citation Impact 32 Mendeley Readers 88th Percentile Journal information ECOTOXICOLOGY Impact Factor 1.951
Quadroni, S., Galassi, S., Capoccioni, F., Ciccotti, E., Grandi, G., De Leo, G., et al. (2013). Contamination, parasitism and condition of Anguilla anguilla in three Italian stocks. ECOTOXICOLOGY, 22(1), 94-108 [10.1007/s10646-012-1006-0].
Quadroni, S; Galassi, S; Capoccioni, F; Ciccotti, E; Grandi, G; De Leo, G; Bettinetti, R
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/78075
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