923,342 research outputs found
Heavy metal pollution and blackheaded gull (larus ridibundus L.) breeding ecology
No full textHeavy metals in air, soil and water are a global problem and present a growing threat to the environment. These metals may have profound consequences for birds and can cause a number of sub-lethal effects, such as decreased reproductive success. The concentrations of selected heavy metals (As, Cd. Co, Cu, Fe, Pb, Mn, Ni, V, Zn) and Se in eggs and feathers from populations of black-headed gulls (Larus ridibundus L.) located on different colonies in the UK, which have different characteristics and are subject to different sources, types and degrees of pollution, were examined. Concentrations of As, Cu, Pb, Ni, Se and V measured in black-headed gull eggs were consistently high relative to those reported in previous field studies with other gull species. However, no significant effect was observed on the egg characteristics in terms of egg size and dimensions, shell thickness and index as a result of concentrations of metals measured in this study. Concentrations of Co, Fe and Ni were significantly negatively correlated with yolk:albumen ratio in the egg. The usefulness of sampling eggs to provide a reflection of local contamination has been demonstrated, with concentrations related to local sources of metal pollution and site differences reflected in sediment concentrations from previous studies. The importance of taking into account diffuse and historical pollution in addition to point source discharges has also been highlighted. As, Fe, Mn, Pb, Se, V and Zn were found at significantly higher concentrations in egg contents than egg shell, and Cd, Co and Ni concentrations were higher in shell than contents. Cu was distributed approximately equally. Within the egg contents, concentrations of As, Cu, Se and V were higher in the albumen than in the yolk, and Co, Fe, Mn, Ni, Pb and Zn concentrations were higher in the yolk than the albumen. Cd was found mainly in the shell and concentrations in egg contents were largely undetectable. Comparisons were made between a colony subject to high-level commercial egg harvesting and an un-harvested site, and between pre- and post-harvesting eggs on the harvested site. Postcollection eggs were found to be of significantly lower quality than the pre-collection eggs and the eggs from the uncollected site, as indicated by yolk:albumen ratio. Concentration of metals in eggs as a result of relaying forced by commercial harvesting has been demonstrated, with concentrations of Co, Fe and Ni significantly higher in post-collection eggs compared to precollection eggs. Average nesting density was significantly lower on the collected colony than the uncollected colony. No effect on egg size was found as a result of changes in nesting density. Concentrations of metals in black-headed gull chick down were measured and compared to egg data in order to assess the usefulness of feathers as a tool for non-destructive monitoring of metal pollution. The results suggest that feathers may be good indicators for As and Zn, and possibly also for Mn and Ni. However, the sample masses were very small and for a number of metals concentrations were largely undetectable using the analytical equipment available in this study. Future work with larger samples of down would be prudent to further examine the use of chick down to provide an indication of the level of pollution to which birds are exposed. The importance of using appropriate washing procedures to remove exogenous contamination of feathers to assess internal concentrations has been demonstrate
Oral History Interview with Don Pickard, September 17, 2020
No full textThe National Museum of the Pacific War presents an interview with Don Pickard. Pickard was in high school when the war started and recalls a few anecdotes from childhood before joining the Navy in mid-1944. Once in the Navy, Pickard was assigned to the Amphibious Force. He served as a signalman aboard USS Bergen (APA-150). On his first voyage, they delivered ammunition to Ulithi. Pickard also went to Okinawa and describes typhoons. After the war ended, his ship carried parts of the First Marine Division to China. Upon returning to the US, Pickard received his discharge in mid-1946
The Arts Interview. Julia Pickard
No full textHost Fred Hollingshurst interviews painter Julia Pickard, who discusses how the Newfoundland environment, especially its light and colour, have influenced her art. Pickard explains some of her methods and techniques when painting in oils. Her recent work is expressionistic and figurative, although her earlier works are more impressionistic and scenic. The fact that Newfoundland is relatively small and isolated, the artists are able to interact as a community
L.A. Chuck Pickard, July 20, 1984
No full textL.A. Pickard discusses his experiences as a smokejumper in Montana, which started in 1948 and ended in 1950. He comments on the social life, the experimental firefighting equipment used, and the 1949 Mann Gulch Fire. He also discusses Forest Service policy from his point of view as an environmentalist.https://scholarworks.umt.edu/smokejumpers/1086/thumbnail.jp
Pickard, Kate E.R., letter, [May? 1855], to [William?] Still
No full textKate Pickard poses questions regarding the history of Peter Still's parents (“a knowledge of which is necessary to the complete narration of the story”), such as how long had Peter’s father been married when he purchased his freedom, what was the father’s employment before and after he was enslaved, and what were the details of the mother’s successful and unsuccessful escape attempts
Embodying precarity, pain and perfection: young dancers’ commitment to the ballet body as aesthetic project
No full textThis chapter examines the embodied practices of young dancers and their aspirations to become professional, performing ballet dancers. It explores the social world of ballet, young dancers’ commitment to the social construction of the body as aesthetic project and some lived experiences of precarity, pain and perfection. Pierre Bourdieu’s conceptual schema of field, habitus and capital is used as a way of making greater sense of the social world of ballet, the relationship of a dancer’s body to the powerful ballet aesthetic and identity as a ballet dancer. Ten young dancers, five girls and five boys, all of whom want to be professional, performing ballet dancers, were interviewed in the context of their non-residential, elite ballet school. The findings and discussion are presented as integrated together with literature and suggest that young dancers’ perception and understandings are that the social world of ballet is about devoting yourself, your body and your mind to the art of ballet as an aesthetic project. The young dancers accepted and believed that ‘hard work’ will bring personal capital and enable success
Pickard, Kate E.R., letter, Camillus, [N.Y.], April 24, 1854, to "Uncle Peter" [Peter Still]
No full textKate Pickard acknowledges the receipt of Peter Still’s letter; consoles Still regarding news that he has received relating to the price for freeing his enslaved family; relays family news (e.g., of her sister Julia's marriage to Mr. LeGrand Marvin, a lawyer of Buffalo, N.Y.); regrets that his summer fundraising visit to her area the previous year was not as successful as it might have been, had it occurred in the winter; and counsels Still to trust in the Lord
Paramitraceras Pickard-Cambridge 1905
No full textParamitraceras Pickard-Cambridge, 1905 Type species: Paramitraceras granulatum Pickard-Cambridge, 1905, by original designation.Published as part of Cruz-López, Jesús A. & Francke, Oscar F., 2013, Two new species of the genus Paramitraceras Pickard-Cambridge, 1905 (Opiliones: Laniatores: Stygnopsidae) from Chiapas, Mexico, pp. 481-490 in Zootaxa 3641 (4) on page 2, DOI: 10.11646/zootaxa.3641.4.13, http://zenodo.org/record/21941
Enna O. Pickard-Cambridge 1897
No full textEnna O. Pickard-Cambridge 1897 Enna O. Pickard-Cambridge 1897: 232, figs 13 a, b, c; Sierwald 1990: 51; Carico 1993: 226; Sierwald 1993: 63. Type species. Enna velox O. Pickard-Cambridge 1897, by original designation. Diagnosis. See Silva et al. (2008).Published as part of Cruz, Estevam L., Silva, Da, Viquez, Carlos & Lise, Arno A., 2012, On the Neotropical spider genera Enna O. Pickard-Cambridge, 1897 and Syntrechalea F. O. Pickard-Cambridge, 1902 (Araneae, Lycosoidea, Trechaleidae): descriptions, taxonomic notes and new records, pp. 55-62 in Zootaxa 3334 on page 56, DOI: 10.5281/zenodo.28129
Pickard, Kate E.R., letter, Camillus, [N.Y.], May 30, 1857, to "Uncle Peter" [Peter Still]
No full textKate Pickard acknowledges to Peter Still that she has not written to him for some time, although in the meantime she has learned news of him through Mr. Hamilton and Mr. May; updates Still on the health and activities of members of her family (including the birth of her daughter Jane); consoles him on the death of his mother; encourages him in selling the book about his life and family, noting that he gets both his “share as proprietor & the agent’s percentage besides”; and relates that, although there is not much news from Alabama, she has learned that Judge Weakl[e]y of Florence has died
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