133,353 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
Pickard, D.L., letter, Camillus, [N.Y.], January 23, 1856, to "Uncle Peter" [Peter Still]
No full textWriting for his wife, D.L. Pickard informs Peter Still that arrangements for publication of the book about Still and his family “have been made with Wm. T. Hamilton, book merchant of Syracuse”; notes that the volume “is now ready for the press”; desires to know of current prospects for freeing the small child (Still’s grandson) remaining in bondage; wants to know whether or not the book must therefore be delayed; and reports on the health of his family
Tenedos O. Pickard-Cambridge 1897
No full textTenedos O. Pickard-Cambridge, 1897 Tenedos O. Pickard-Cambridge, 1897: 6, type species: Tenedos lautus O. Pickard-Cambridge, 1897: 226; Jocqué 1991: 93; Jocqué & Baert 1996: 309; Jocqué & Baert 2002: 80. Tijuca Mello-Leit „o, 1925: 461 (preoccupied by Tijuca Férussac, 1829 in Aves), type species: Tijuca eduardoi Mello-Leit „o, 1925: 462. Naibena Chamberlin, 1925: 214, type species: Naibena barrona Chamberlin, 1925: 214; Jocqué 1991: 93 (Synonymy). Tijucaia Mello-Leit „o, 1940: 33 (nomem novum for Tijuca); Jocqué 1991: 93 (Synonymy).Published as part of Martínez, Leonel, Brescovit, Antonio D. & Martínez, Carlos Prieto, 2023, Revealing the diversity of ant-eating spiders in Colombia II: morphology, distribution, and taxonomy of the trilobatus group of the genus Tenedos O. Pickard-Cambridge, 1897 (Araneae: Zodariidae), pp. 1-66 in Zootaxa 5328 (1) on page 7, DOI: 10.11646/zootaxa.5328.1.1, http://zenodo.org/record/824389
Tenedos O. Pickard-Cambridge 1897
No full textTenedos O. Pickard-Cambridge, 1897 Tenedos O. Pickard-Cambridge, 1897: 6, type species: Tenedos lautus O. Pickard- Cambridge, 1897: 226; Jocqué 1991: 93; Jocqué & Baert 1996: 309; Jocqué & Baert 2002: 80–125. Tijuca Mello Leitão, 1925: 461 (preoccupied by Tijuca Férussac, 1829 in Aves), type species: Tijuca eduardoi Mello Leitão, 1925: 462. Naibena Chamberlin, 1925: 214, type species: Naibena barrona Chamberlin, 1925: 214; Jocqué 1991: 93 (Synonymy). Tijucaia Mello-Leitão, 1940: 33 (nomem novum for Tijuca); Jocqué 1991: 93 (Synonymy).Published as part of Martínez, Leonel, Brescovit, Antonio D. & Quijano, Luis G., 2022, Revealing the diversity of ant-eating spiders in Colombia I: morphology, distribution and taxonomy of the barronus group of the genus Tenedos O. Pickard-Cambridge, 1897 (Araneae: Zodariidae), pp. 1-154 in Zootaxa 5130 (1) on page 8, DOI: 10.11646/zootaxa.5130.1.1, http://zenodo.org/record/652071
Trochosa propinqua O. Pickard-Cambridge 1885
No full text<i>Trochosa propinqua</i> O. Pickard-Cambridge, 1885 <p> <i>Trochosa propinqua</i> O. Pickard-Cambridge, 1885: 82 (♀).</p> <p> <b>Type material.</b> Syntype ♀ from <b>INDIA:</b> <i>Jammu & Kashmir</i>: Sind Valley (34°16’N, 74°49’E; 1689 m alt.), leg. F. Stoliczka, 5–13 August 1883, repository unknown, probably OUMNH, London (no registration number specified), not examined as the type was not available for the present study.</p> <p> <b>Notes.</b> This species is known from a single taxonomic entry with only textual description that is insufficient to identify it (Pickard-Cambridge 1885). In the original description (Pickard-Cambridge 1885), the species was compared with <i>T. ruricola</i>. The novelty of this species remained unchallenged until the examination of its type or topotype material.</p> <p> <b>Distribution.</b> India (Jammu & Kashmir, Pickard-Cambridge 1885).</p>Published as part of <i>Sankaran, Pradeep M. & Caleb, John T. D., 2023, Notes on Indian wolf spiders: III. Genera Acantholycosa Dahl, 1908, Evippomma Roewer, 1959, Hippasosa Roewer, 1960 and Trochosa C. L. Koch, 1847 (Araneae: Lycosidae), pp. 533-552 in Zootaxa 5369 (4)</i> on page 549, DOI: 10.11646/zootaxa.5369.4.4, <a href="http://zenodo.org/record/10145893">http://zenodo.org/record/10145893</a>
Clubiona neglecta O. Pickard-Cambridge 1862
No full textClubiona neglecta (O. Pickard-Cambridge, 1862) MATERIAL. 3 ♂♂, 2, bottomland herbaceous Salix - Alnus thicket, VI & VIII.2007, DK.Published as part of Esyunin, S. L. & Kazantsev, D. K, 2007, On the spider (Aranei) fauna of the Pechoro - Ilychskiy Reserve (North Urals), with the description of a new Agroeca species (Liocranidae), pp. 245-250 in Arthropoda Selecta 16 (4) on page 246, DOI: 10.5281/zenodo.58408
Panamomops dybowskii O. Pickard-Cambridge 1873
No full textPanamomops dybowskii (O. Pickard-Cambridge, 1873) MATERIAL. 1 ♀, I, creek of Malaya Garevka River, bottomland Picea forest with high-herbage, 30.VI—02.VII.2007, DK.Published as part of Esyunin, S. L. & Kazantsev, D. K, 2007, On the spider (Aranei) fauna of the Pechoro - Ilychskiy Reserve (North Urals), with the description of a new Agroeca species (Liocranidae), pp. 245-250 in Arthropoda Selecta 16 (4) on page 247, DOI: 10.5281/zenodo.58408
Alien Registration- Pickard, Harry D. (Madawaska, Aroostook County)
No full texthttps://digitalmaine.com/alien_docs/35145/thumbnail.jp
Can we Help the Bots? Towards an Evaluation of their Performance and the Creation of Human Enhanced Artifact for Emotions De-escalation
No full textWe propose a hybrid intelligence socio-technical artifact that identifies a threshold where the chatbot requires human intervention in order to continue to perform at an appropriate level to achieve the pre-defined objective of the system. We leverage the Yield Shift Theory of Satisfaction, the Intervention Theory and the Nudge Theory to develop meta requirements and design principles for this system. We discuss the first iteration of implementation and evaluation of the artifact components
Phoneutria reidyi F. O. Pickard-Cambridge 1897
No full textPhoneutria reidyi (F. O. Pickard-Cambridge, 1897) New records and Distribution. Brazil, Guyana, Peru and Venezuela (Simó & Brescovit 2001). New record for Colombia in the Meta Department (Fig. 9). Material examined. COLOMBIA. Meta. Puerto Lleras, Lomalinda, 73 ° 22 ’W, 03° 18 ’N, 1 ♀ (CAS).Published as part of Hazzi, Nicolás A., Valderrama-Ardila, Carlos, Brescovit Daniele Polotow, Antonio D. & Simó, Miguel, 2013, New records and geographical distribution of ctenid spiders (Araneae: Ctenidae) in Colombia, pp. 243-254 in Zootaxa 3709 (3) on page 252, DOI: 10.11646/zootaxa.3709.3.3, http://zenodo.org/record/22222
- …
