Residues of O,P′-DDD and O,P′-DDT in brown pelican eggs and mallard ducks

Lamont, T. G.; Bagley, George E.; Reichel, W. L.

doi:10.1007/bf01558317

Cited by 20 publications

(7 citation statements)

References 5 publications

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“…Organochlorine insecticides and PCB ( Polychlorinated biphenyls) residues in three red-shouldered hawk eggs are presented in Table 7. The p,p'-DDE levels of 0.79-2.40 ppm in the red-shouldered hawk eggs are relatively low compared to the 39.5-135.0 ppm wet weight encountered in brown pelican eggs from Anacapa Island, California, in 1969 (LaMont, Bagley, andReichel 1970). However, dieldrin levels were higher in the red-shouldered hawk eggs than in the brown pelican eggs (0.16-0.35 vs. 0.12).…”

Section: Recruitment Rate and Pesticidesmentioning

confidence: 91%

Territorial Behavior, Pesticides, and the Population Ecology of Red-shouldered Hawks in Central Maryland, 1943-1971

Henny¹,

Schmid²,

Martin³

et al. 1973

Ecology

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A breeding population of red-shouldered hawks (Buteo lineatus) along the Patuxent River in central Maryland was studied during the interval 1943-71. Numbers of breeding pairs remained unchanged or increased on the PWRC (Patuxent Wildlife Research Center) and an adjoining area where habitat was not altered. A reduction in breeding pairs occurred on the third study area where large portions of the habitat had been destroyed. Basic information on 74 nests was obtained and the annual number of breeding pairs on the PWRC ranged from a low of four to a high of nine during the study. Nesting success of this highly territorial species decreased significantly as the distance between adjacent nest sites decreased (Errington's principle of inversity). Since 1960, the recruitment rate during "high" density years was 1.34 young fledged per pair as opposed to 1.95 during "optimum" (1943 and 1947 levels) density years. The 1.95 figure compared favorably with the estimated recruitment rate necessary for maintaining a stable population and with recruitment rates observed in other locations prior to the modern pesticide era. As the observed recruitment rate during the 4 years of "optimum" density was believed adequate, it is doubtful that the relatively low pesticide levels in the eggs had a detrimental effect on the reproductive performance of the population.

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Section: Recruitment Rate and Pesticidesmentioning

confidence: 91%

Territorial Behavior, Pesticides, and the Population Ecology of Red-shouldered Hawks in Central Maryland, 1943-1971

Henny¹,

Schmid²,

Martin³

et al. 1973

Ecology

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“…The o,p'-isomers are less stable than the p,p' configurations and are therefore found only in low concentrations in nature (210). However, p,p'-DDT was also reported to have estrogenic actions both on the rat uterus (211) and in the MCF-7 breast cancer cell line (212).…”

Section: Organochlorine Pesticidesmentioning

confidence: 99%

Male reproductive health and environmental xenoestrogens.

Toppari

Larsen

Christiansen

et al. 1996

Environ Health Perspect

1,102

567

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Male reproductive health has deteriorated in many countries during the last few decades. In the 1990s, declining semen quality has been reported from Belgium, Denmark, France, and Great Britain. The incidence of testicular cancer has increased during the same time. Incidences of hypospadias and cryptorchidism also appear to be increasing. Similar reproductive problems occur in many wildlife species. There are marked geographic differences in the prevalence of male reproductive disorders. While the reasons for these differences are currently unknown, both clinical and laboratory research suggest that the adverse changes may be inter-related and have a common origin in fetal life or childhood. Exposure of the male fetus to supranormal levels of estrogens, such as diethlylstilbestrol, can result in the above-mentioned reproductive defects. The growing number of reports demonstrating that common environmental contaminants and natural factors possess estrogenic activity presents the working hypothesis that the adverse trends in male reproductive health may be, at least in part, associated with exposure to estrogenic or other hormonally active (e.g., antiandrogenic) environmental chemicals during fetal and childhood development. An extensive research program is needed to understand the extent of the problem, its underlying etiology, and the development of a strategy for prevention and intervention. Environ Health Perspect 104(Suppl 4): 741-803 (1996)

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“…Now, o,p ′‐DDT is detected only at ppb levels, and there were very few early studies trying to detect a impurity o,p ′‐DDT in wild birds. Nonetheless, the reproductive capability of birds may have been historically compromised by embryonic o,p ′‐DDT exposure because several hundred ppm of DDT homologues were reported in the eggs of wild birds during the 1960s and 1970s [11,12].…”

Section: Introductionmentioning

confidence: 99%

Reproductive and developmental effects of transovarian exposure to o,p′‐DDT in Japanese quails

Kamata¹,

Shiraishi²,

Takahashi³

et al. 2009

Enviro Toxic and Chemistry

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Avian species have the possible risk of embryonic exposure to persistent, lipophilic environmental contaminants, such as dichlorodiphenyltrichloroethane (DDT), by transfer of chemicals accumulated in mother birds to eggs. To model developmental and reproductive disorders of wild birds living in contaminated areas, we exposed Japanese quails in ovo to o,p'-DDT prior to incubation. A positive estrogenic substance diethylstilbestrol (DES; 1 and 10 ng/g of egg) and o,p'-DDT (1-100 microg/g of egg) were injected into the yolk before incubation. Treatment with o,p'-DDT (10 or 100 microg/g) but not with DES significantly reduced the hatchability of eggs. After sexual maturation, o,p'-DDT affected eggshell formation in female quails but had little influence on laying; high doses of o,p'-DDT significantly reduced eggshell strength, shell weight, and shell thickness, and several females treated with 100 microg o,p'-DDT/g laid eggs lacking shells. Diethylstilbestrol decreased egg production itself but had little effect on the eggshell. Both o,p'-DDT and DES caused dose-dependent shortening of the left oviduct and abnormal development of the right oviduct in females, while testis asymmetry was observed in males treated with a high dose of DES. In the uterus of the oviduct, the mRNAs for calcium-regulating factors osteopontin and calbindin D28K were reduced by both treatments, particularly that with o,p'-DDT. The results indicated that transovarian exposure to o,p'-DDT could bring about population declines in avian species through loss of fecundity caused by depression of hatchability and dysfunction of the reproductive tract.

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Residues of O,P′-DDD and O,P′-DDT in brown pelican eggs and mallard ducks

Cited by 20 publications

References 5 publications

Territorial Behavior, Pesticides, and the Population Ecology of Red-shouldered Hawks in Central Maryland, 1943-1971

Territorial Behavior, Pesticides, and the Population Ecology of Red-shouldered Hawks in Central Maryland, 1943-1971

Male reproductive health and environmental xenoestrogens.

Reproductive and developmental effects of transovarian exposure to o,p′‐DDT in Japanese quails

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