Seasonal Variation of Body Condition and Organochlorines in Wild Ducks from California and Mexico

Mora, Miguel Ángel Candel; Anderson, Daniel W.; Mount, Michael E.

doi:10.2307/3801644

Cited by 33 publications

(18 citation statements)

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“…The fact that several species were collected during both seasons and were combined for the statistical analysis should not influence the results because the concentration values observed for each species were low and numerically very similar (range: 8-242 ng/g ww, n = 37, excluding two extreme values). The lack of differences in DDE concentrations between migrant and resident birds are also in agreement with other studies that have pointed out the lack of a clear pattern of DDE accumulation in migrant birds while in Mexico or in their wintering grounds (Elliott et al 2007;Klemens et al 2000;Mora 1997;Mora et al 1987). Capparella et al (2003) detected low concentrations of DDE in few (3% of 135 individuals) resident passerine birds from South America.…”

Section: Discussionsupporting

confidence: 91%

“…In the early 1980s, Mora et al (1987) documented that northern pintails (Anas acuta) wintering in western and central Mexico had lower levels of OCs, particularly DDE, than those wintering in the Salton Sea in southern California. Thereafter, other studies also suggested that OCs are as likely to accumulate in birds during the summer as well as during migration or in the winter (Bartuszevige et al 2002;Capparella et al 2003;Elliott et al 2007;Harper et al 1996;Klemens et al 2000Klemens et al , 2003Mora 1997).…”

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confidence: 99%

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Organochlorine Pollutants and Stable Isotopes in Resident and Migrant Passerine Birds from Northwest Michoacán, Mexico

Mora

2008

Arch Environ Contam Toxicol

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Although concentrations of organochlorine compounds (OCs) in birds from most of the United States and Canada have decreased over the last 30 years, there is still concern that migrant birds might be exposed to elevated concentrations of OCs during migration in Latin America. The Lerma-Chapala Basin in west-central Mexico is an important migration corridor and wintering area for many species. The objectives of this study were to assess if resident and migrant birds wintering in western Michoacán, Mexico accumulated elevated concentrations of OCs during fall and spring and to determine if the stable isotopes d 15 N, d 13 C, and dD could be used to predict burdens and origins of DDE accumulation. Resident and migrant passerine insectivorous birds were collected during fall and spring (2001)(2002) in northwest Michoacán, near Chapala Lake, Mexico. The carcasses were analyzed for OCs and tail feathers were analyzed for stable isotopes d 15 N, d 13 C, and dD. The OCs detected in more than 50% of the samples were: oxychlordane (79%), p,p'-DDE (100%), p,p 0 -DDT (57%), and total PCBs (100%). p,p 0 -DDE was the OC detected at the highest concentrations, whereas residues of other OCs were near or below detection limits. Overall, there were no significant differences in concentrations of OCs between seasons or between resident and migrant birds. Concentrations of DDE and oxychlordane were somewhat higher in migrant and resident birds during spring than in fall; however, concentrations were significantly different only for oxychlordane. Two resident birds collected in fall and spring had DDE residues [10 lg/g wet weight in carcass. There were no significant differences in d 13 C and d 15 N values among species, between seasons, or between migrant and resident birds. However, dD values were clearly different between species and helped differentiate migrant from resident birds. dD values also were negatively and significantly correlated with DDE concentrations in carcass. Birds with more depleted dD values in feathers tended to have higher DDE concentrations than those with less depleted dD values, suggesting a potential latitudinal accumulation of DDE. Overall, our results suggest that during fall and spring, there is not a significant buildup of persistent OCs in migrant and resident passerine insectivorous birds in northwest Michoacán, Mexico.

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Section: Discussionsupporting

confidence: 91%

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confidence: 99%

Organochlorine Pollutants and Stable Isotopes in Resident and Migrant Passerine Birds from Northwest Michoacán, Mexico

Mora

2008

Arch Environ Contam Toxicol

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“…Elevated levels of DDT and its metabolites, DDE and DDD, are suspected in some fish and waterbird samples (Linn, 1987;Mora, 1984). A finding of elevated levels would be consistent with findings of other studies in the area.…”

Section: Organochlorine Pesticide Residuessupporting

confidence: 73%

“…Concentrations of DDE, a metabolite of DDT, were higher in waterfowl collected from the Salton Sea than from similar samples from Mexico (Mora, 1984). High DDE concentrations were observed in water-bird eggs collected in 1985 from the Salton Sea basin (H.M. Ohlendorf, U.S. Fish and Wildlife Service, oral commun., 1988).…”

Section: Biotamentioning

confidence: 99%

Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the Salton Sea area, California, 1986-87

Setmire¹,

Wolfe²,

Stroud³

1990

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“…The dominance of detected OCs showed the approximate order: CHLs (the sum of cis-/trans-chlordane, cis-/trans-nonachlor, oxychlordane, heptachlor, and heptachlor epoxide) = DDTs (the sum of o,p'-/p,p'-DDD, o,p'-/p,p'-DDE, and o,p'-/ p,p'-DDT) > HCB > DRNs (the sum of aldrin, endrin, and dieldrin) > > TOX (the sum of B8-1413, B7-515, B9-1679, B9-1025, and B10-1110). DDTs were detected in the range 5.1-667 ng g -1 during Oct 2000-Feb 2002, which was narrower than that (11-9785 ng g -1 on a dry weight basis) of pintails captured in southern California and Mexico during Dec 1981-Mar 1982 (Mora et al, 1987). The detection frequency of DDTs approximately followed the order: p,p'-DDE > p,p'-DDD > p,p'-DDT > o,p'-DDD = o,p'-DDE = o,p'-DDT.…”

Section: Resultsmentioning

confidence: 90%

Toxaphene and Other Organochlorine Compounds in Pintails (Anas acuta) from Saitama Kamoba in Japan during Oct 2000–Feb 2002

Takazawa

Yoshikane

Shibata

2007

Bull Environ Contam Toxicol

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Seasonal Variation of Body Condition and Organochlorines in Wild Ducks from California and Mexico

Cited by 33 publications

References 0 publications

Organochlorine Pollutants and Stable Isotopes in Resident and Migrant Passerine Birds from Northwest Michoacán, Mexico

Organochlorine Pollutants and Stable Isotopes in Resident and Migrant Passerine Birds from Northwest Michoacán, Mexico

Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the Salton Sea area, California, 1986-87

Toxaphene and Other Organochlorine Compounds in Pintails (Anas acuta) from Saitama Kamoba in Japan during Oct 2000–Feb 2002

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