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Movement and diet of brown boobies in a remote protected area suggest temporal variations in foraging strategiesNARA Subscribed
Understanding tropical seabird foraging strategies is essential for evaluating ecosystem functioning within Very Large Marine Protected Areas (VLMPAs). We investigated spatial and trophic behavior of brown booby ( Sula leucogaster ) at the Saint Peter and Saint Paul Archipelago (SPSP), a remote breeding site within a VLMPA in the equatorial Atlantic Ocean. Using GPS tracking from 207 individuals (706 trips, 2014–2015 and 2023–...
Seabird diets serve as valuable tools for monitoring forage fish populations, particularly when fishery-dependent data overlook key segments such as juvenile cohorts. In this study, we evaluated whether Peruvian booby ( Sula variegata ), a predator of anchoveta ( Engraulis ringens ), could be used as an ecological indicator of anchoveta size structures during the early industrial fishing season in northern Peru. We analysed re...
Diet and resource partitioning between egrets and herons in an estuarine colony in southern BrazilNARA Subscribed
Herons are predators at high levels of the trophic webs in aquatic and adjacent terrestrial environments. They often breed sympatrically, forming colonies with multiple species that play key roles in the transport of nutrients and can serve as environmental sentinels. However, studies evaluating foraging habits, resource partitioning, and niche overlap are still scarce. We used complementary stable isotopes of carbon and nitro...
Marine megafauna species are affected by a wide range of anthropogenic threats. To evaluate the risk of such threats, species’ vulnerability to each threat must first be determined. We build on the existing threats classification scheme and ranking system of the International Union for Conservation of Nature (IUCN) Red List of Threatened Species by assessing the vulnerability of 256 marine megafauna species to 23 at‐sea threat...
Aim Environmental features can act as selection pressures and barriers to gene flow between populations. The genetic structuring of highly mobile but philopatric seabirds creates a paradox, and the role of oceanographic and geographic variables is still poorly understood. In this study, we investigate the influence of environmental and geographic variables in the genetic and phenotypic diversity of a pantropical seabird breedi...
Stable isotope analysis is an approach that allows inferring feeding ecology and trophic structure of populations, especially for species that are difficult to observe in natural habitats, such as marine turtles. This study investigated the niche breadth of adult and juvenile green sea turtles ( Chelonia mydas ) through δ 15 N and δ 13 C values in carapace scutes. During 2017 and 2018, tissues were collected from juveniles in...