José Manuel Reyes-González

José Manuel Reyes-González
Estación Biológica de Doñana · Conservation Biology

PhD

About

53
Publications
9,775
Reads
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220
Citations
Additional affiliations
November 2010 - present
University of Barcelona
Position
  • PhD Student
September 2007 - October 2008
Universidad Autónoma de Madrid
Position
  • Research Assistant

Publications

Publications (53)
Article
Full-text available
Every year, billions of birds undertake extensive migrations between breeding and non-breeding areas, facing challenges that require behavioural adjustments, particularly to flight timing and duration. Such adjustments in daily activity patterns and the influence of extrinsic factors (e.g., environmental conditions, moonlight) have received much mo...
Presentation
Full-text available
In colonial seabirds, ecological divergence may occur in the absence of physical barriers, driven by the isolation of populations due to distance, or the adaptation to local environment. In migratory seabirds, the geographic segregation among breeding populations can persist year round (i.e., strong migratory connectivity) when populations breeding...
Article
Light‐level geolocators are popular bio‐logging tools, with advantageous sizes, longevity, and affordability. Biologists tracking seabirds often presume geolocator spatial accuracies between 186‐202 km from previously‐innovative, yet taxonomically, spatially, and computationally limited, studies. Using recently developed methods, we investigated wh...
Article
Full-text available
Migratory marine species cross political borders and enter the high seas, where the lack of an effective global management framework for biodiversity leaves them vulnerable to threats. Here, we combine 10,108 tracks from 5775 individual birds at 87 sites with data on breeding population sizes to estimate the relative year-round importance of nation...
Article
Sexual segregation in foraging strategies has been little studied in marine species with slight Sexual Size Dimorphism (SSD), particularly regarding the role of environmental conditions and fishery activities. Sexual differences in fishery attendance are of particular concern because uneven mortality associated with bycatch may exacerbate impacts i...
Article
Despite its importance for ecology and conservation, we are still far from understanding how environmental variability interacts with intrinsic factors and individual specialization to determine trophic strategies of long-lived taxa, mostly due to difficulties in studying the same animals over extended periods. Here, by yearly consistently sampling...
Article
Full-text available
ABSTRACT: Insights into the year-round movements and behaviour of seabirds are essential to better understand their ecology and to evaluate possible threats at sea. The Atlantic petrel Pterodroma incerta is an Endangered gadfly petrel endemic to the South Atlantic Ocean, with virtually the entire population breeding on Gough Island (Tristan da Cun...
Article
Full-text available
Sexual segregation (SS) is widespread among animal taxa, with males and females segregated in distribution, behavior, or feeding ecology but so far, most studies on birds have focused on the breeding period. Outside this period, the relevance of segregation and the potential drivers of its persistence remain elusive, especially in the marine enviro...
Article
Full-text available
Many generalist species are composed of individuals varying in the size of their realized niches within a population. To understand the underlying causes and implications of this phenomenon, repeated samplings on the same individuals subjected to different environmental conditions are needed. Here, we studied individual specialization of feeding st...
Presentation
Foraging distributions of colonial central place foragers are shaped not only by environmental factors but also by population parameters: larger colonies will deplete resources around the colony and will therefore have larger foraging areas, but parapatric competition will often cause spatial segregation, leading to little overlap among foraging ar...
Book
Full-text available
This book has been published by the Spanish Society of Ornithology (SEO/BirdLife) in the framework of the MIGRA programme. In this work we analyse the movement ecology and at-sea behaviour of two related seabird species under conservation concern: the Scopoli's and the Cory's Shearwater. It focuses on Spanish populations, covering the entire distri...
Presentation
Conservation policies for the protection of marine biodiversity are being implemented in many international management treaties worldwide. The process of identification of Marine Protected Areas (MPAs) is often based on the spatial preference of threatened species, such as many marine predators. Multi-colony tracking studies comprising a wide geogr...
Article
Full-text available
With increasing pressure on the oceans from environmental change, there has been a global call for improved protection of marine ecosystems through the implementation of Marine Protected Areas (MPAs). Here, we used Species Distribution Modelling (SDM) of tracking data from 14 seabird species to identify key marine areas in the southwest Atlantic Oc...
Article
Full-text available
Fisheries provide an abundant and predictable food source for many pelagic seabirds through discards, but also pose a major threat to them through bycatch, threatening their populations worldwide. The reform of the European Common Fisheries Policy (CFP), which intends to ban discards through the landing obligation of all catches, may force seabirds...
Presentation
It is well known that colonial breeders are spatially constrained by their need to return to the colony to attend their rearing duties. This behaviour results in a decreasing density of foraging birds with the distance to the colony. In addition, the effect of intraspecific competition, which grows with colony size, also increases the length of for...
Conference Paper
Research on sexual segregation is essential to understand the role of sexual differences on distribution, migration and reproduction over the annual cycle of migratory species. Sexual differences in seabird ecology have been often reported during the breeding period, yet little is known about sex effects out of that period. We evaluated the degree...
Presentation
Foraging strategies of colonial central-place foragers, such as breading seabirds, are spatially constrained by their need to return to the colony to attend to their rearing duties and by a denso-dependent competition for resources that increases with colony size. Moreover, in areas where the foraging ranges of several breeding colonies potentially...
Conference Paper
Fisheries and seabirds are intimately associated as both exploit the same productive areas. Some seabirds take advantage of fishery discards, mostly generated by trawlers, as a supplementary foraging resource, changing their foraging strategies linked to this predictable food. Thus it is expected that any change in fishing practices will have impor...
Article
Full-text available
Long-distance migrants are suffering drastic declines in the last decades. Causes beneath this problem are complex due to the wide spatial and temporal scale involved. We aim to reveal migratory routes, stopover areas, wintering grounds, and migratory strategies for the most southwestern populations of the near-threatened European Roller Coracias g...
Article
Full-text available
Apical pelagic species forage in predictable habitats, and their movements should signal biologically and ecologically significant areas of the marine ecosystem. Several countries are now engaged in identifying these areas based on animal tracking, but this is often limited to a few individuals from one breeding population, which may result in bias...

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Projects

Projects (3)
Project
Seabirds are key organisms in sea-land Spanish National Parks Research, because most of them are protected threatened species and included in the Annex I of the EU Birds Directive. Despite some research has been done on population dynamics and threats on land, the information about the relationship with environmental traits and particularly the movements of seabirds at sea remain unknown. However, this information is critical to define or revaluate the limits and zoning of protected areas. This project will study movements at sea of Cory's/Scopoli's Shearwater (Calonectris diomedea) as model species in PN Cabrera, PN Timanfaya and PN Islas Atlánticas. State-of-the-art devices and analytical tools will be used in order to know their foraging and resting grounds, the main corridors between both, diet composition, interannual consistency, and fishing interactions. Knowledge produced by this project will allow to predict seabird movements facing environmental variability, as well as to evaluate threats at sea. Finally, this information will be really useful in order to revaluate edges and planned zoning of sea-land Spanish National Parks.
Project
The environmental sustainability and the conservation of biodiversity is one of the major challenges of the Spanish society. In particular, our project seeks (1) Identifying main foraging, resting and wintering areas and their corridors in four pelagic seabirds (Cory’s, Scopoli’s and Cape Verde shearwaters and Bulwer’s petrel) throughout the year; (2) Evaluating the spatial consistency of these areas across several temporal scales; (3) Identifying the environmental variables driving seasonal and inter-annual changes in these areas, and exploring their suitability as early predictors of the seabird distribution; (4) Assessing spatiotemporal overlap and interactions between pelagic seabirds and the different types of fisheries operating in the Mediterranean and the Atlantic.
Project
Since 2011 we are researchig about migration of Spanish birds, thanks to new thecnologies (satelite transmiters, GSM trasmitters, GPS data loggers, geolocators, nano-GPS).