Download or read book Contamination of and Biomarkers in the Great Blue Heron Ardea Herodias Indicator Species for the St Lawrence River 2001 2002 written by and published by . This book was released on 2009 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geographic Distribution of Selected Contaminants in Great Blue Herons from the St Lawrence River System Qu bec 1989 1994 written by Jean-Luc DesGranges and published by . This book was released on 2009 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geographic Distribution of Selected Contaminants in Great Blue Herons from the St Lawrence River System Quebec 1989 1994 written by Jean-Luc DesGranges and published by . This book was released on 2009 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Great Blue Herons Ardea Herodias as Potential Bioindicators of the Pollution Levels of Watersheds in the Northeastern United States from 1873 to 2012 written by Jill K. Mandel and published by . This book was released on 2013 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitoring the State of the St Lawrence River written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Patient Predator written by Robert William Butler and published by Canadian Museum of Civilization/Musee Canadien Des Civilisations. This book was released on 1995 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes a six-year study of the great blue heron (Ardea herodias) on British Columbia's Pacific coast. The study period included five breeding seasons and four winters. The researchers studied a colony of 85-100 pairs on Sidney Island and visited about 40 other colonies around the Strait of Georgia over 1986-91. This report presents the results of the study, with information on the heron's diet, food availability, foraging behavior, use of habitats by age-classes and sex-classes, seasonal shifts in habitat use, spacing of breeding colonies in relation to predators and foraging habitats, effects of nest site selection and time of breeding on breeding success, and local survival of age-classes.
Download or read book Great Blue Heron written by and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lawrence, from In the 2012 survey of Great Blue Heron colonies, Lake Saint-François, upstream, to Sept-Îles and the average number of young per clutch was the Magdalen Islands in the Gulf (Figure 1). [...] In 2011, the following colonies were sampled: Île aux Hérons and Grande-Île, in the fluvial section; Île aux Basques, in the lower estuary; and Île Manowin, in the Gulf. [...] The eggs are kept cool and sent to the laboratory to be analyzed for mercury,1 PCBs,2 organochlorine pesticides (e.g., DDT3),PBDEs4 and sometimes dioxins and furans.5 Due to fluctuations in the size and presence of colonies, it is sometimes difficult to monitor the same colony over a long period. [...] The contaminant concentrations show few concentrations of total PBDEs in Great Blue Heron eggs were on the same order of magnitude 3.5 as those of DDE and PBDE concentrations measured 3 (11) in Herring Gull eggs from (7) the Great Lakes. [...] The analysis of the main historical and emerging contaminants in Great Blue Heron egg sampling on Île aux Hérons Photo: © Annie Michel Great Blue Heron eggs provides an indication 5 BIOLOGICAL RESOURCES WATER SEDIMENTS SHORELINES USES and loss, can interfere with the functioning of the organism and pose a risk to wildlife populations.
Download or read book Behaviours Influencing the Distribution of Great Blue Herons Ardea Herodias Fannini in the Strait of Georgia British Columbia microform written by James Kenneth Kenyon and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2005 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Great Blue Heron (Ardea herodias fannini), a nonmigratory subspecies endemic to the Pacific Northwest of North America, is COSEWIC-listed in Canada as a species of 'special concern'. The Breeding Bird Survey (BBS), conducted since 1969, indicate an ongoing decline in numbers. Recent findings show that nest and colony abandonments are common, and are strongly associated with disturbance by bald eagles (Haliaeetus leucocephalus). Vanishing bearings of herons departing foraging sites were strongly associated with colony locations, and led to the discovery of small, previously unknown colonies. A probabilistic model predicted that dispersed nesting offers increased nestling safety under high eagle depredation. Ideal free distributions accounting for colony locations as well as foraging-site size and quality best matched the observed distribution of foraging herons. These findings support the hypothesis that great blue herons have redistributed into smaller, more widely-scattered colonies as eagle numbers have recovered over recent decades.
Download or read book Ontogeny of Behavior in the Great Blue Heron Ardea Herodias written by Michele A. Merritt and published by . This book was released on 1981 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Great Blue Heron Ardea Herodias at Crab Orchard National Wildlife Refuge written by Crista L. Straub and published by . This book was released on 2006 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Great Blue Heron written by Alvin C. Lopinot and published by . This book was released on 1950 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factors Influencing the Foraging Success of the Great Blue Heron Ardea Herodias written by William D. Hobbs and published by . This book was released on 1999 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Observations of Great Blue Heron Ardea Herodias and Black Night Heron Nycticorax Nycticorax and Their Detrimental Effect on Nesting Habitat Inkerman Migratory Bird Sanctuary New Brunswick 1971 2006 written by Colin Mark MacKinnon and published by . This book was released on 2006 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Colonial birds such as great blue heron, Ardea herodias, and black-crowned night heron, Nycticorax nycticorax, may abandon a nest location due to habitat loss, human development and encroachment, other disturbances or nesting tree mortality. This report presents observations related to macro habitat changes within the heron colony at Inkerman Migratory Bird Sanctuary (MBS), Pointe aux Rats Musqués, Baie de Pokemouche, New Brunswick. Aerial photographs, periodic surveys, as well as detailed notes on colony configuration, provide a case study on habitat degradation and loss at this heron colony.
Download or read book The Great Blue Heron Ardea Herodias written by British Columbia. Ministry of Environment, Lands, and Parks and published by . This book was released on 1998 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Great Blue Heron written by U.S. Fish and Wildlife Service and published by . This book was released on 1993 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book COSEWIC Status Report on Pacific Great Blue Heron Ardea Herodias Fannini written by Butler, Robert William and published by COSEWIC = COSEPAC. This book was released on 1997 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Patterns of Dispersion and Foraging Behavior of Great Blue Herons Ardea Herodias During a Period of Flood in Upper Pool 20 of the Mississippi River written by Jeremy Eugene Guinn and published by . This book was released on 2000 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
