Olrog's Gull Larus atlanticus

  • Order: Charadriiformes
  • Family: Laridae
  • Monotypic
  • Authors: Pablo Yorio

Priorities for Future Research

Olrog's Gull parent with chicksSeveral research recommendations were presented by Yorio et al. (2005). These include: (1) develop comprehensive and simultaneous surveys throughout the breeding range during the same breeding season so as to obtain a correct estimation of the total breeding population, (2) evaluate natural and human related factors which may contribute to the observed changes between seasons in the use of colony sites, such as predation pressure, food availability and human disturbance, (3) promote studies on the effects of pollution on Olrog’s Gull populations in southern Buenos Aires, (4) implement population and demography studies of the species, focusing on data on age of first breeding, survival rates, fecundity, recruitment rates, dispersion and breeding site fidelity, and (5) coordinate efforts for the assessment of migratory patterns.

Although differences in nest-site characteristics are observed between Olrog’s and Kelp gulls, there is an important overlap indicating potential spatial conflict between the two species (García Borboroglu and Yorio 2007b). In addition, Kelp Gulls occupy breeding colonies earlier and may, therefore, interfere with settlement of Olrog’s Gulls. Considering the increase in the numbers, colony area and nesting density of Kelp Gulls currently observed in coastal Patagonia, there is an urgent need to implement monitoring programs for both species and conduct studies to better predict the results of their interactions (García Borboroglu and Yorio 2007b).

Recommended Citation

Yorio, P. (2009). Olrog's Gull (Larus atlanticus), version 1.0. In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/nb.olrgul1.01