| Titre : | Waterbirds 39(2) - APR 2016 |
| Type de document : | Bulletin |
| Paru le : | 01/04/2016 |
Dépouillements
Article
Alexander L. Bond, Auteur ;
Sabina I. Wilhelm, Auteur ;
Gregory J. Robertson, Auteur ;
Stephanie Avery-Gomm, Auteur
Environmental conditions in eastern Newfoundland have changed considerably since the 1970s, as both bottom-up oceanographic and anthropogenic influences on seabird populations have fluctuated considerably. The diet, reproductive success, and pre[...]
Article
Sabina I. Wilhelm, Auteur ;
Jean-Francois Rail, Auteur ;
Paul M. Regular, Auteur ;
Carina Gjerdrum, Auteur ;
Gregory J. Robertson, Auteur
Large-scale relationships between changes in abundance of coastal breeding Herring (Larus argentatus) and Great Black-backed (L. marinus) gulls and commercial fisheries landings of bottom-dwelling groundfish spanning 28 years in four of Canada's[...]
Article
Antony W. Diamond, Auteur ;
Catherine Otorowski, Auteur
Distinguishing among eggs of large gull species in mixed colonies is difficult because egg size is variable, size ranges overlap and colors are similar. Regional and yearly differences in egg size of Herring Gulls (Larus argentatus) were compare[...]
Article
Noah G. Perlut, Auteur ;
David N. Bonter, Auteur ;
Julie C. Ellis, Auteur ;
Margaret S. Friar, Auteur
A number of colonial waterbird species have been documented nesting on roof-tops throughout Europe and North America. The most common hypothesis explaining why gulls (Laridae) select roof-tops for nesting has been that population growth rates ar[...]
Article
Pablo Yorio, Auteur ;
Joaquim Olinto Branco, Auteur ;
Javier Lenzi, Auteur ;
Guillermo Luna-Jorquera, Auteur ;
Carlos Zavalaga, Auteur
In South America, Kelp Gulls (Larus dominicanus) breed from Chilean Tierra del Fuego north to Rio de Janeiro, Brazil, on the Atlantic coast and to Piura, Peru, on the Pacific coast. This review presents the first synthesis of information on the [...]
Article
Jean-Francois Giroux, Auteur ;
Martin Patenaude-Monette, Auteur ;
Florent Lagarde, Auteur ;
Ericka Thieriot, Auteur ;
Pierre Brousseau, Auteur ;
Pierre Molina, Auteur
Ring-billed Gulls (Larus delawarensis) were rare at the beginning of the 20th century, possibly because of intensive exploitation. Once they became protected in 1916, their numbers increased throughout eastern North America, reaching a maximum o[...]
Article
Gregory J. Robertson, Auteur ;
Danielle T. Fife, Auteur ;
Mark L. Mallory, Auteur ;
Anna M. Calvert, Auteur
In response to human activity and ecosystem changes, large gulls in eastern North America have shown a variety of population trends over the last 100 years. Seven years of capture-mark-recapture data were analyzed for Herring (Larus argentatus) [...]
Article
Brian E. Washburn, Auteur ;
Susan B. Elbin, Auteur ;
Christina Davis, Auteur
During the 20th century, gull populations in North America experienced considerable changes in abundance and geographic ranges. The objective of this study was to describe population trends of Herring Gulls (Larus argentatus) and Great Black-bac[...]
Article
Gregory J. Robertson, Auteur ;
Sheena Roul, Auteur ;
Karel A. Allard, Auteur ;
Cynthia Pekarik, Auteur ;
Raphael A. Lavoie, Auteur ;
Julie C. Ellis, Auteur ;
Noah G. Perlut, Auteur ;
Antony W. Diamond, Auteur ;
Nikki Benjamin, Auteur ;
Robert A. Ronconi, Auteur ;
Scott G. Gilliland, Auteur ;
Brian G. Veitch, Auteur
Herring Gull (Larus argentatus) and Great Black-backed Gull (L. marinus) morphometric data from various eastern North American locations was collected to examine the sources of variation in body size within and among geographic regions. For Herr[...]
Article
Glen H. Mittelhauser, Auteur ;
R. Bradford Allen, Auteur ;
Jordan Chalfant, Auteur ;
Richard P. Schauffler, Auteur ;
Linda J. Welch, Auteur
The status and trends of Maine's island-nesting Herring Gull (Larus argentatus) and Great Black-backed Gull (L. marinus) populations have changed dramatically over the last century. Aerial photographs were used to count nesting Herring and Great[...]
Article
Philip A. Whittington, Auteur ;
Robert J. M. Crawford, Auteur ;
A. Paul Martin, Auteur ;
Rod M. Randall, Auteur ;
Mark Brown, Auteur ;
Peter G. Ryan, Auteur ;
Bruce M. Dyer, Auteur ;
Keith H. B. Harison, Auteur ;
Johan Huisamen, Auteur ;
Azwianewi B. Makhado, Auteur ;
Leshia Upfold, Auteur ;
Lauren J. Waller, Auteur ;
Minke Witteveen, Auteur
South Africa's population of Kelp Gulls (Larus dominicanus vetula) numbered about 10,000 pairs during 1976/1977-1980/1981, increased to 21,000 pairs from 2000/2001-2004/2005 and then decreased to 17,500 pairs from 2009/2010-2013/2014. The increa[...]
Article
Scott G. Gilliland, Auteur ;
C. Davison Ankney, Auteur ;
Gregory J. Robertson, Auteur
Morphology, body condition and survival of Great Black-backed Gull (Larus marinus) chicks raised in broods of different size in southern New Brunswick, Canada, were compared. The relationship between age and body size measurements taken from 68 [...]
Article
Robert A. Ronconi, Auteur ;
Jessica R. Stephens, Auteur ;
Zoe J. Crysler, Auteur ;
Ingrid L. Pollet, Auteur ;
Danielle T. Fife, Auteur ;
Andrew G. Horn, Auteur ;
Philip D. Taylor, Auteur
Sable Island is the most isolated seabird colony site in eastern Canada and the United States, offering a unique opportunity to study the population dynamics of terns and gulls in an area removed from human activities. Sable Island likely suppor[...]
Article
Brian G. Veitch, Auteur ;
Gregory J. Robertson, Auteur ;
Ian L. Jones, Auteur ;
Alexander L. Bond, Auteur
The increase in gull (Laridae) populations through the 20th century, largely due to an upsurge in anthropogenic food sources, has raised concerns about the effects of gulls on sympatric populations of other seabirds. In Newfoundland and Labrador[...]
Article
Gregory J. Robertson, Auteur ;
Keith G. Chaulk, Auteur
Information on the status, trends and dynamics of large gulls nesting in northern areas is limited. Herring (Larus argentatus) and Great Black-backed (L. marinus) gull breeding colonies were surveyed in coastal Labrador, Canada, from 1998 to 200[...]
Article
Daniel E. Clark, Auteur ;
Kiana K. G. Koenen, Auteur ;
Jillian J. Whitney, Auteur ;
Kenneth G. MacKenzie, Auteur ;
Stephen DeStefano, Auteur
While the breeding ecology of gulls (Laridae) has been well studied, their movements and spatial organization during the non-breeding season is poorly understood. The seasonal movements, winter-site fidelity, and site persistence of Ring-billed [...]
Article
David Boertmann, Auteur ;
Morten Frederiksen, Auteur
Great Black-backed (Larus marinus), Lesser Black-backed (L. fuscus) and Herring (L. argentatus) gulls have all shown population increases and range expansion in Greenland in recent decades, but in very different ways. Great Black-backed Gulls in[...]
Article
Carina Gjerdrum, Auteur ;
Francois Bolduc, Auteur
Comprehensive understanding of the potential threats faced by seabirds requires information on their distribution and abundance in the marine environment where they spend a significant part of their life cycle. Data collected from shipboard seab[...]
Article
Ruedi G. Nager, Auteur ;
Nina J. O'Hanlon, Auteur
Between-population variation of changes in numbers can provide insights into factors influencing variation in demography and how population size or density is regulated. Here, spatio-temporal patterns of population change of Herring Gull (Larus [...]
Article
Cynthia Pekarik, Auteur ;
Ian K. Barker, Auteur ;
D. V. Chip Weseloh, Auteur
In 2001-2002, Great Black-backed Gull (Larus marinus) eggs from Lake Ontario had significantly higher concentrations of organochlorine contaminants than Herring Gull (L. argentatus) eggs. This study investigated whether higher contaminants in Gr[...]
Article
Martti Hario, Auteur ;
Jukka Rintala, Auteur
After an increase from the 1930s through the mid-1990s, the populations of the Herring Gull (Larus argentatus), the Lesser Black-backed Gull (L. fuscus fuscus), and the Great Black-backed Gull (L. marinus) in Finland are currently declining at r[...]
Article
Gregory J. Robertson, Auteur
Herring Gulls (Larus argentatus) have been banded in large numbers in eastern North America for over a century, and much has been learned about their movements and non-breeding distributions. To see if changes have occurred in the non-breeding d[...]
