Some Effects of X-Irradiation on the Breeding Biology of Eastern Bluebirds

Norris, Robert A.

doi:10.2307/4082101

Cited by 7 publications

(5 citation statements)

References 3 publications

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“…Few studies are available for comparison. Apparently the four bluebird nestlings irradiated up to ~I 0.5 Gy by Norris (1958) grew and developed normally. This contrasts with a more extensive study by Willard (1963), which showed that radiation exposure ofbluebirds when 9 d old is much less damaging than exposure when 2 d old.…”

Section: Growthmentioning

confidence: 90%

“…Our results clearly show that nestling Tree Swallows, acutely exposed to gamma radiation at levels up to 4.5 Gy immediately after hatching, suffer no detectable radiation-induced mortality during the 20-d nestling period (Table 1). In a study by Norris (1958), four Eastern Bluebird nestlings (Sialia sialis) fledged successfully after acute exposures of 3.5 to 10.5 Gy at 7-14 d of age. Willard (1963) speculated that the 50% lethal dose for young bluebirds over a 16-d nestling period (LD50116) is ~ 21.7 Gy, and that exposures > 26.1 Gy are almost always lethal.…”

Section: Mortalitymentioning

confidence: 99%

“…However, for a given species, developing nestlings should be more sensitive than adults. Bird embryos are usually more sensitive to radiation than nestlings and adults (Steamer and Tyler 1957, Norris 1958, Goffl959, von Wendt 1981.…”

Section: Mortalitymentioning

confidence: 99%

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Gamma Radiation Effects on Nestling Tree Swallows

Zach¹,

Mayoh²

1984

Ecology

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The sensitivity of Tree Swallows (Tachycineta bicolor) to the stress of ionizing radiation was investigated with growth analysis. Freshly hatched nestings were temporality removed from nests, taken to the laboratory and acutely exposed to 0.9, 2.7, or 4.5 Gy gamma radiation. Some of the unirradiated control nestlings were also taken to the laboratory, whereas other were left in the nests. Growth of all the nestlings was measured daily and analyzed by fitting growth models. There was no detectable radiation—induced mortality up to fledging, °20 after irradiation. Radiation exposure did not affect the basic growth pattern; the logistic growth model was most suitable for body mass and foot length, and the von Bertalanffy model for primary—feather length, irrespective of treatment. Parameter values from these models indicated pronounced growth depression in the 2.7—Gy and 4.5—Gy groups, particularly for body mass. Radiation also affected the timing of development. The growth depression of the 2.7—Gy group was similar to that cause by hatching asynchrony in unirradiated nestlings. The 4.5—Gy nestlings grew as well as unexposed nestlings that died from natural causes. Chronic irradiation at °1.0 Gy/d caused more severe growth effects than acute exposure to 4.5 Gy and may have caused permanent stunting. Growth analysis is a potent tool for assessing man—made environmental stresses. Observed body—mass statistics and model parameters seem to be most sensitive to environmental stresses, but coefficients of variation are not necessarily correlated with seabirds. Unfortunately, growth analysis may fail to assess the full impact of the stress, because stress factors can have effects far beyond the initial growing period.

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Section: Growthmentioning

confidence: 90%

Section: Mortalitymentioning

confidence: 99%

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Gamma Radiation Effects on Nestling Tree Swallows

Zach¹,

Mayoh²

1984

Ecology

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“…White Leghorn male chickens x-irradiated before puberty with dosages from 1200 to 8400 r showed no treatment effects on mating behavior (Sturkie et al, 1949). Norris (1958) subjected adult bluebirds to doses of x-rays varying from 200 to 600 r at 23.5 r per , minute. He found no observable effects on clutch size, length of incubation period, hatching success, or productivity.…”

Section: Reproductive Behaviormentioning

confidence: 97%

EFFECTS OF RADIATION ON THE BEHAVIOR OF ANIMALS: A REVIEW OF THE LITERATURE. Appendix to 1972 Progress Report.

Preston¹

1972

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“…He also concluded that nestling bluebirds seemed to be more resistant to gamma radiation than young chickens. Norris (1958) indicated that week-old songbirds might also have greater radioresistance than laboratory chicks and ducklings of the same age. He also exposed several groups of adult female eastern bluebirds and several eggs to a dose rate of 23.5 R/m for accumulated doses of 200-600 R. The number of eggs laid, incubation period, hatching success, nestling period, and general reproductive success were essentially the same for treated and control females.…”

Section: Speciesmentioning

confidence: 99%

Ecological aspects of decommissioning and decontamination of facilities on the Hanford Reservation

Rickard¹,

Klepper²

1976

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Some Effects of X-Irradiation on the Breeding Biology of Eastern Bluebirds

Cited by 7 publications

References 3 publications

Gamma Radiation Effects on Nestling Tree Swallows

Gamma Radiation Effects on Nestling Tree Swallows

EFFECTS OF RADIATION ON THE BEHAVIOR OF ANIMALS: A REVIEW OF THE LITERATURE. Appendix to 1972 Progress Report.

Ecological aspects of decommissioning and decontamination of facilities on the Hanford Reservation

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