Organochlorine chemical residues in white pelicans and western grebes from the klamath basin, california

Boellstorff, Diane E.; Ohlendorf, Harry M.; Anderson, Daniel W.; O'Neill, Edward J.; Keith, James O.; Prouty, Richard M.

doi:10.1007/bf01055535

Cited by 20 publications

(9 citation statements)

References 20 publications

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“…The DDE concentration reported in the cited study was 1.4 ppm, not 1 ppm (Boellstorff et al 1985 ). The 1% was reported by Boellstorff et al ( 1985 ) to not be statistically signifi cant.…”

Section: Ddt In Birdsmentioning

confidence: 49%

“…The DDE concentration reported in the cited study was 1.4 ppm, not 1 ppm (Boellstorff et al 1985 ). The 1% was reported by Boellstorff et al ( 1985 ) to not be statistically signifi cant. The authors concluded: "Thickness of grebe eggshells collected at Tule Lake NWR in 1972 and 1981 and in northern California from 1952 to 1960 were not signifi cantly different from each other and were not thinner than eggs collected before 1947 (Table 4 ).…”

Section: Ddt In Birdsmentioning

confidence: 49%

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DDT, Chlordane, Toxaphene and PCB Residues in Newport Bay and Watershed: Assessment of Hazard to Wildlife and Human Health

Byard¹,

Paulsen

Tjeerdema

et al. 2014

Reviews of Environmental Contamination and Toxicology Volume 235

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“…The DDE concentration reported in the cited study was 1.4 ppm, not 1 ppm (Boellstorff et al 1985 ). The 1% was reported by Boellstorff et al ( 1985 ) to not be statistically signifi cant.…”

Section: Ddt In Birdsmentioning

confidence: 49%

Section: Ddt In Birdsmentioning

confidence: 49%

DDT, Chlordane, Toxaphene and PCB Residues in Newport Bay and Watershed: Assessment of Hazard to Wildlife and Human Health

Byard¹,

Paulsen

Tjeerdema

et al. 2014

Reviews of Environmental Contamination and Toxicology Volume 235

View full text Add to dashboard Cite

“…The most closely related species for which data were available is the western grebe (Aechmophorus occidentalis): a no-effect concentration of 1.4 mg kg −1 w.w. is reported for this species (Boellstorff et al, 1985), while decreased eggshell thickness index (Ratcliffe's Index) was observed at 6.6 mg kg −1 w.w.…”

Section: Great Crested Grebementioning

confidence: 87%

Ecological Risk Assessment for the Recent Case of DDT Pollution in Lake Maggiore (Northern Italy)

Bettinetti

Croce

Galassi

2005

Water Air Soil Pollut

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Contamination by DDT of industrial origin was detected in 1996 in Lake Maggiore (Northern Italy) causing concern for wildlife and human health. Starting from 1998 a monitoring programme involving different research laboratories was undertaken to establish the pollution level of the lake. In assessing the ecological risk to Lake Maggiore wildlife during this period, the present study integrates information provided by the Commission for the Protection of Italian and Swiss Waters with further analysis and ecotoxicological tests carried out on some autochthonous target species for this insecticide. Sediments collected at the end of 1997 in the most contaminated bay (total DDT 860.2 ng g −1 dry weight) caused a decrease in fertility and growth of benthic oligochaetes and chironomids, while the 48 h IC 50 for Daphnia galeata (0.76 µg L −1 , c.i. 0.43-1.34) was much higher than the DDT concentration in the lake water. The risk of acute effects on zooplankton should therefore be excluded, while transfer through the trophic web and bioconcentration in fish and fish-eating birds are the most adverse consequences of DDT contamination in Lake Maggiore.

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“…; Boellstorff et al. ; Donaldson and Braune ). However, it is unclear whether the AWPE population is still increasing toward pre‐DDT levels or whether favorable conditions have allowed them to surpass pre‐DDT population levels.…”

mentioning

confidence: 99%

“…Increasing populations coincide with aquaculture expansion (King and Grewe 2001;King 2005) and the ban of DDT. Several studies suggest that this increase in the AWPE population, in part, may be a response to previous declines caused by DDT prior to the ban (Anderson et al 1969;Blus et al 1974;Boellstorff et al 1985;Donaldson and Braune 1999). However, it is unclear whether the AWPE population is still increasing toward pre-DDT levels or whether favorable conditions have allowed them to surpass pre-DDT population levels.…”

mentioning

confidence: 99%

Does a Bioenergetics Model Accurately Predict Fish Consumption by American White Pelicans? A Case Study on Walleyes in the Tamarac River, Minnesota

Graham

Hafs

Kennedy

2019

N American J Fish Manag

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The effect of piscivorous birds on fisheries is a growing concern for fisheries managers, especially when native birds consume large quantities of fish. The Red Lakes, Minnesota, fishery is one such example, where congregations of American white pelicans (AWPEs) Pelecanus erythrorhynchos forage on spawning Walleyes Sander vitreus. We quantified AWPE consumption of Walleyes on the Tamarac River, a major tributary of the Red Lakes, by using empirical diet data collected from lethally sampled birds and separately by using a bioenergetics model. Furthermore, we evaluated the diet and foraging patterns of AWPEs on the river. Camera trap data revealed that AWPEs were foraging nearly completely nocturnally, likely in response to Walleye spawning migrations, with Walleyes accounting for 98% of AWPE diets. The empirical estimate of daily fish consumption from lethally sampled birds was not significantly different from the bioenergetics estimate. Monte Carlo simulations were used to provide estimates of uncertainty in annual Walleye consumption. Based on the simulations, all estimates of annual Walleye consumption between 2014 and 2016 represented < 1% of adult (age ≥ 3) Walleyes in the system and < 2.5% of adult Walleye natural mortality. This amount of Walleye consumption by AWPEs, at current population levels, does not pose a management concern.

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Organochlorine chemical residues in white pelicans and western grebes from the klamath basin, california

Cited by 20 publications

References 20 publications

DDT, Chlordane, Toxaphene and PCB Residues in Newport Bay and Watershed: Assessment of Hazard to Wildlife and Human Health

DDT, Chlordane, Toxaphene and PCB Residues in Newport Bay and Watershed: Assessment of Hazard to Wildlife and Human Health

Ecological Risk Assessment for the Recent Case of DDT Pollution in Lake Maggiore (Northern Italy)

Does a Bioenergetics Model Accurately Predict Fish Consumption by American White Pelicans? A Case Study on Walleyes in the Tamarac River, Minnesota

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