Olrog's Gull (Larus atlanticus)

2009 ◽  
Author(s):  
Pablo Yorio
Keyword(s):  
Olrog’S Gull

Mercury levels and health parameters in the threatened Olrog’s Gull (Larus atlanticus) from Argentina

2010 ◽  
Vol 181 (1-4) ◽  
pp. 1-11 ◽  
Author(s):  
Luciano Francisco La Sala ◽  
Pablo Fabricio Petracci ◽  
Judit Emmy Smits ◽  
Sandra Botté ◽  
Robert W. Furness
Keyword(s):  
Olrog’S Gull ◽  
Health Parameters

Epidemiology of acanthocephalan infections in crabs from the Bahía Blanca Estuary, Argentina

2011 ◽  
Vol 86 (4) ◽  
pp. 446-452 ◽  
Author(s):  
L.F. La Sala ◽  
A.M. Perez ◽  
S.R. Martorelli
Keyword(s):  
Risk Factors ◽  
Carapace Length ◽  
Carapace Width ◽  
Infection Prevalence ◽  
Intensity Of Infection ◽  
Breeding Colony ◽  
Bahía Blanca Estuary ◽  
Feeding Area ◽  
Olrog’S Gull ◽  
Blanca Estuary

AbstractThis study was conducted in two populations of crabs, Cyrtograpsus angulatus and Neohelice granulata from the Bahía Blanca Estuary, in Argentina, to identify risk factors for infection by the acanthocephalan Profilicollis chasmagnathi and to assess the association between infection and mortality of these hosts. Cyrtograpsus angulatus and N. granulata crabs were sampled seasonally over the course of a year, and spring sampling included collection of dead crabs predated by Olrog's gulls in a nearby breeding colony. Potential risk factors for infection were assessed and the number of cystacanth larvae per crab was counted. In C. angulatus, the odds of infection increased by 7% for each millimetre increase in carapace length, and were nearly 17 times greater in crabs sampled from the Olrog's gull feeding area compared with those sampled from nests in the breeding colony. For every millimetre increase in carapace length in N. granulata, the odds of infection increased by 13% in crabs from the breeding colony, and by 32% in crabs from the feeding area. Mean intensity of infection in N. granulata increased by 16.5% for each additional millimetre of carapace width. The level of parasite aggregation was lowest in the largest C. angulatus and highest in N. granulata predated by Olrog's gull. The results show that host size is the most important factor influencing infection prevalence in both crab species and intensity of infection in N. granulata, and suggest the presence of parasite-induced mortality in the populations studied.

Some Digeneans from Olrog's Gull Larus atlanticus Olrog, 1958 (Aves: Laridae) from the Bahía Blanca Estuary, Argentina

2009 ◽  
Vol 76 (1) ◽  
pp. 113-116 ◽  
Author(s):  
Luciano F. La Sala ◽  
Sergio R. Martorelli ◽  
Pilar Alda ◽  
Paula Marcotegui
Keyword(s):  
Bahía Blanca Estuary ◽  
Olrog’S Gull ◽  
Blanca Estuary

The diet of Olrog's Gull (Larus atlanticus) reveals an association with fisheries during the non-breeding season

2013 ◽  
Vol 113 (1) ◽  
pp. 69-76 ◽  
Author(s):  
María Paula Berón ◽  
Juan Pablo Seco Pon ◽  
Germán O. García ◽  
Carla A. Paterlini ◽  
Rocío Mariano-Jelicich ◽  
...  
Keyword(s):  
Breeding Season ◽  
Olrog’S Gull

scholarly journals Chlorpyrifos and persistent organic pollutants in feathers of the near threatened Olrog’s Gull in southeastern Buenos Aires Province, Argentina

2020 ◽  
pp. 115918
Author(s):  
Agustina Quadri-Adrogué ◽  
Juan Pablo Seco Pon ◽  
Germán Oscar García ◽  
Melina Vanesa Castano ◽  
Sofia Copello ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Buenos Aires ◽  
Buenos Aires Province ◽  
Olrog’S Gull ◽  
Near Threatened

Breeding Biology of Olrog's Gull in Bahía Blanca Estuary, Argentina

2011 ◽  
Vol 123 (2) ◽  
pp. 243-250 ◽  
Author(s):  
Luciano F. La Sala ◽  
Andrés Perez ◽  
Sergio Martorelli ◽  
Judit Smits
Keyword(s):  
Breeding Biology ◽  
Bahía Blanca Estuary ◽  
Olrog’S Gull ◽  
Blanca Estuary

Pathology of enteric infections induced by the acanthocephalan Profilicollis chasmagnathi in Olrog's gull, Larus atlanticus, from Argentina

2011 ◽  
Vol 87 (1) ◽  
pp. 17-23 ◽  
Author(s):  
L.F. La Sala ◽  
A.M. Perez ◽  
J.E. Smits ◽  
S.R. Martorelli
Keyword(s):  
Risk Factor ◽  
Pathological Findings ◽  
Intensity Of Infection ◽  
Marine Birds ◽  
Intestinal Perforations ◽  
Enteric Infections ◽  
Severe Pathology ◽  
Olrog’S Gull ◽  
Chick Size

AbstractAcanthocephalans can be pathogenic helminths of marine birds. Every year during the breeding season, there is variable mortality among prefledged chicks from the largest known Olrog's gull (Larus atlanticus) colony. Mortality has been associated with infection by the acanthocephalan Profilicollis chasmagnathi. Our aim was to study the role of chicks' size as a risk factor for intensity of infection and severe pathology, and to expand upon previous pathological findings reported in acanthocephalan-infected chicks. Size of the chick was associated with intensity of infection and number of intestinal perforations, which increased by 6.9% and 4.1%, respectively, for each millimetre increment in chick size. Infection was associated with inflammatory enteritis and granulomatous peritonitis. Complete intestinal perforations were observed in 85% and 97.3% of the studied chicks in 2005 and 2006, respectively, and they were observed very early during the post-hatching period. Our results show: (1) the presence of advanced pathology associated with acanthocephalan infections in chicks, beginning very early in the post-hatching period; and (2) significant increases in the intensity of infection and the associated pathology as a function of size of chicks, in dead chicks during this period.

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