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Titolo:
HINDLIMB DEFORMITIES (ECTROMELIA, ECTRODACTYLY) IN FREE-LIVING ANURANS FROM AGRICULTURAL HABITATS
Autore:
OUELLET M; BONIN J; RODRIGUE J; DESGRANGES JL; LAIR S;
Indirizzi:
MCGILL UNIV,REDPATH MUSEUM,859 SHERBROOKE ST W MONTREAL PQ H3A 2K6 CANADA CANADIAN WILDLIFE SERV,QUEBEC REG ST FOY PQ G1V 4H5 CANADA UNIV MONTREAL,FAC MED VET ST HYACINTHE PQ J2S 7C6 CANADA
Titolo Testata:
Journal of wildlife diseases
fascicolo: 1, volume: 33, anno: 1997,
pagine: 95 - 104
SICI:
0090-3558(1997)33:1<95:HD(EIF>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
AMPHIBIANS; TADPOLES; TOXICITY; EMBRYOS; LIMBS;
Keywords:
ANURANS; AMPHIBIANS; ECTROMELIA; ECTRODACTYLY; HINDLIMB DEFORMITIES; PESTICIDES; AGRICULTURAL CONTAMINANTS; QUEBEC;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
48
Recensione:
Indirizzi per estratti:
Citazione:
M. Ouellet et al., "HINDLIMB DEFORMITIES (ECTROMELIA, ECTRODACTYLY) IN FREE-LIVING ANURANS FROM AGRICULTURAL HABITATS", Journal of wildlife diseases, 33(1), 1997, pp. 95-104

Abstract

High prevalences of hindlimb deformities were recorded in wild-caughtgreen frogs (Rana clamitans), northern leopard frogs (Rana pipiens), American toads (Bufo americanus), and bullfrogs (Rana catesbeiana) from agricultural sites exposed to pesticide runoff in tile St. Lawrence River Valley of Quebec, Canada, between July and September 1992 and 1993. Of 853 metamorphosing anurans examined in 14 farmland habitats, 106 (12%; range 0 to 69%) had severe degrees of ectromelia and ectrodactyly compared to only two (0.7%; range 0 to 7.7%) of 271 in 12 control sites. However, the variation in the proportion of deformities among sites was too large to conclude that there was a significant differencebetween control and pesticide-exposed habitats. Clinical signs variedand were characterized by segmental hypoplasia or agenesis of affected limbs. Conspicuous abnormalities interfered with swimming and hopping, and likely constituted a survival handicap. Because of circumstances and the frequency of these malformations in nine distinct habitats, and in three different species from one of our study sites, we proposea teratogenic action of exogenous factors. Despite the fact that manybiotic and abiotic agents are potentially harmful to limb development, agricultural contaminants were suspected as primary aggressors. Thus, clinical examination and frequency of deformities in anurans might be an economical screening tool to assess ecosystem health and the presence of environmental contaminants.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/10/20 alle ore 07:20:55