| an evaluation of marine bird population trends following the exxon valdez oil spill, prince william sound, alaska. | we examined post-spill trends (1989-1998) of marine bird populations in prince william sound (pws) following the exxon valdez oil spill (evos) to evaluate recovery of injured taxa. two criteria were employed. first, we examined population trends of injured taxa only in the oiled area of pws using regression models. second, we examined population trends of injured taxa in the oiled area relative to the unoiled area using homogeneity of the slopes tests. we considered a population recovering if th ... | 2001 | 11381751 |
| response of pigeon guillemots to variable abundance of high-lipid and low-lipid prey. | populations of the pigeon guillemot (cepphus columba) and other piscivores have been in decline for several decades in the gulf of alaska and bering sea, and a decline in abundance of lipid-rich schooling fishes is hypothesized as the major cause. we tested this hypothesis by studying the breeding biology of pigeon guillemots during 1995-1999 while simultaneously measuring prey abundance with beach seines and bottom trawls. our study area (kachemak bay, alaska) comprises two oceanographically di ... | 2002 | 28547364 |
| changes in myoglobin and lactate dehydrogenase in muscle tissues of a diving bird, the pigeon guillemot, during maturation. | 1. the concentration of myoglobin (mb) and the isozymic distribution and activity of lactate dehydrogenase (ldh) in heart and pectoralis muscle were investigated at three stages of maturation of the pigeon guillemot, cepphus columba. 2. mb is not detectable in chick pectoralis; it is present in fledgling pectoralis muscle and increases four-fold in adult pectoralis. mb concentration in heart muscle is similar in chick and fledgling and doubles in the adult. 3. ldh activities in pectoralis muscle ... | 1988 | 3197398 |
| metals and radionuclides in birds and eggs from amchitka and kiska islands in the bering sea/pacific ocean ecosystem. | metals and radionuclide levels in marine birds of the aleutians are of interest because they are part of subsistence diets of the aleut people, and can also serve as indicators of marine pollution. we examined geographic and species-specific variations in concentrations of radionuclides in birds and their eggs from amchitka, the site of underground nuclear tests from 1965 to 1971, and kiska islands (a reference site) in the aleutians, and the levels of lead, mercury and cadmium in eggs. in 2004 ... | 2007 | 17206460 |
| veterinary contributions to wildlife biology: participation in avian field studies in alaska. | this report describes the author's experiences in participating in avian research during 3 field seasons in remote areas in prince william sound (pws), located in south-central alaska. veterinary support was needed to biopsy the livers of nestling and adult pigeon guillemots (cepphus columba) and adult black oystercatchers (haematopus bachmani). these surgeries were part of larger research studies investigating guillemot and oystercatcher populations and possible continued exposure to residual c ... | 2007 | 18069173 |
| comparison of arsenic, cadmium, chromium, lead, manganese, mercury and selenium in feathers in bald eagle (haliaeetus leucocephalus), and comparison with common eider (somateria mollissima), glaucous-winged gull (larus glaucescens), pigeon guillemot (cepphus columba), and tufted puffin (fratercula cirrhata) from the aleutian chain of alaska. | there is an abundance of field data for levels of metals from a range of places, but relatively few from the north pacific ocean and bering sea. in this paper we examine the levels of arsenic, cadmium, chromium, lead, manganese, mercury and selenium in feathers from common eiders (somateria mollissima), glaucous-winged gulls (larus glaucescens), pigeon guillemots (cepphus columba), tufted puffins (fratercula cirrhata) and bald eagles (haliaeetus leucocephalus) from the aleutian chain of alaska. ... | 2009 | 18521716 |
| stable isotopes link diet to avian yolk carotenoid allocation: a comparative study of five auk species (charadriiformes: alcidae). | the allocation of important but environmentally limited nutrients, such as carotenoids, often represents a trade-off between homeostasis and reproduction. however, key questions remain about how diet and species traits influence carotenoid allocation. we studied yolk carotenoid profiles and yolk color in relation to trophic level (based on delta(15)n values) in five species of seabirds belonging to the family alcidae: common murre (uria aalge), pigeon guillemot (cepphus columba), cassin's auklet ... | 2010 | 20210648 |
| mercury levels and potential risk from subsistence foods from the aleutians. | considerable attention has been devoted to contaminants (mainly pcbs and mercury) in subsistence foods (particularly fish) from various parts of the world. however, relatively little attention has been devoted to examining mercury levels in a full range of subsistence foods from a particular region. while managers and scientists compute risk based on site-specific data on contaminant levels and consumption rates, a first step in making risk decisions by subsistence peoples is knowledge about the ... | 2007 | 17590413 |
| mercury, arsenic, cadmium, chromium lead, and selenium in feathers of pigeon guillemots (cepphus columba) from prince william sound and the aleutian islands of alaska. | arsenic, cadmium, chromium, lead, manganese, mercury and selenium were analyzed in the feathers of pigeon guillemots (cepphus columba) from breeding colonies in prince william sound and in the aleutian islands (amchitka, kiska) to test the null hypothesis that there were no differences in metal levels as a function of location, gender, or whether the birds were from oiled or unoiled areas in prince william sound. birds from locations with oil from the exxon valdez oil spill in the environment ha ... | 2007 | 17765292 |