Browsing by Author "Madeiros, Jeremy"
Now showing 1 - 3 of 3
Results Per Page
Sort Options
- Exposure of an endangered seabird species to persistent organic pollutants: Assessing levels in blood and link with reproductive parametersPublication . Campioni, Letizia; Oró-Nolla, Bernat; Granadeiro, José P.; Silva, Monica C.; Madeiros, Jeremy; Gjerdrum, Carina; Lacorte, SilviaOcean contamination, particularly from persistent organic pollutants (POPs), remains a significant threat to marine predators that occupy high trophic positions. Long-lived procellariform seabirds are apex predators in marine ecosystems and tend to accumulate contaminants. Prolonged exposure to pollutants negatively affects their fitness including reproductive success. Low breeding success may represent a hurdle for the restoration of small and endangered seabird populations, including several highly threatened gadfly petrels. Here we investigated the annual variation (2019 and 2022) in organochlorine pesticide (OCP), polychlorinated biphenyl ether (PCB), polybrominated diphenyl ether (PBDE), and polycyclic aromatic hydrocarbon (PAH) exposure in the endangered Bermuda petrel (Pterodroma cahow), and the relationship between female contaminant burden and breeding parameters. We found that petrels were exposed to a wide range of pollutants (33 out of 55 showed measurable levels) with PCBs dominating the blood contaminant profiles in both years. Only 9 compounds were detected in >50 % of the birds. Specifically, among OCPs, p, p’-DDE and hexaclorobenzene were the most frequently detected while fluorene and acenaphthene were the most common PAH. The concentrations of ∑5PCBs and ∑7POPs were higher in older birds. Furthermore, females with greater contaminant burdens laid eggs with a lower probability of hatching. However, female investment in egg production (size and volume) was unrelated to their blood contaminant load. Overall, this study highlights the presence of a wide range of contaminants in the petrel's food web, and it sheds light on the potential impact of chronic exposure to sub-lethal levels of PCBs on the breeding success of seabirds. We claim that toxicological testing should be a practice integrated in the management of seabirds, particularly of endangered species to monitor how past and present anthropogenic activities impact their conservation status.
- Global assessment of marine plastic exposure risk for oceanic birdsPublication . Clark, Bethany L.; Carneiro, Ana P. B.; Pearmain, Elizabeth J.; Rouyer, Marie-Morgane; Clay, Thomas A.; Cowger, Win; Phillips, Richard A.; Manica, Andrea; Hazin, Carolina; Eriksen, Marcus; González-Solís, Jacob; Adams, Josh; Albores-Barajas, Yuri V.; Alfaro-Shigueto, Joanna; Alho, Maria Saldanha; Araujo, Deusa Teixeira; Arcos, José Manuel; Arnould, John P. Y.; Barbosa, Nadito J. P.; Barbraud, Christophe; Beard, Annalea M.; Beck, Jessie; Bell, Elizabeth A.; Bennet, Della G.; Berlincourt, Maud; Biscoito, Manuel; Bjørnstad, Oskar K.; Bolton, Mark; Booth Jones, Katherine A.; Borg, John J.; Bourgeois, Karen; Bretagnolle, Vincent; Bried, Joël; Briskie, James V.; Brooke, M. de L.; Brownlie, Katherine C.; Bugoni, Leandro; Calabrese, Licia; Campioni, Letizia; Carey, Mark J.; Carle, Ryan D.; Carlile, Nicholas; Carreiro, Ana R.; Catry, Paulo; Catry, Teresa; Cecere, Jacopo G.; Ceia, Filipe R.; Cherel, Yves; Choi, Chang-Yong; Cianchetti-Benedetti, Marco; Clarke, Rohan H.; Cleeland, Jaimie B.; Colodro, Valentina; Congdon, Bradley C.; Danielsen, Jóhannis; De Pascalis, Federico; Deakin, Zoe; Dehnhard, Nina; Dell’Omo, Giacomo; Delord, Karine; Descamps, Sébastien; Dilley, Ben J.; Dinis, Herculano A.; Dubos, Jerome; Dunphy, Brendon J.; Emmerson, Louise M.; Fagundes, Ana Isabel; Fayet, Annette L.; Felis, Jonathan J.; Fischer, Johannes H.; Freeman, Amanda N. D.; Fromant, Aymeric; Gaibani, Giorgia; García, David; Gjerdrum, Carina; Gomes, Ivandra Soeli Gonçalves Correia; Forero, Manuela G.; Granadeiro, José P.; Grecian, W. James; Grémillet, David; Guilford, Tim; Hallgrimsson, Gunnar Thor; Halpin, Luke R.; Hansen, Erpur Snær; Hedd, April; Helberg, Morten; Helgason, Halfdan H.; Henry, Leeann M.; Hereward, Hannah F. R.; Hernandez-Montero, Marcos; Hindell, Mark A.; Hodum, Peter J.; Imperio, Simona; Jaeger, Audrey; Jessopp, Mark; Jodice, Patrick G. R.; Jones, Carl G.; Jones, Christopher W.; Jónsson, Jón Einar; Kane, Adam; Kapelj, Sven; Kim, Yuna; Kirk, Holly; Kolbeinsson, Yann; Kraemer, Philipp L.; Krüger, Lucas; Lago, Paulo; Landers, Todd J.; Lavers, Jennifer L.; Le Corre, Matthieu; Leal, Andreia; Louzao, Maite; Madeiros, Jeremy; Magalhães, Maria; Mallory, Mark L.; Masello, Juan F.; Massa, Bruno; Matsumoto, Sakiko; McDuie, Fiona; McFarlane Tranquilla, Laura; Medrano, Fernando; Metzger, Benjamin J.; Militão, Teresa; Montevecchi, William A.; Montone, Rosalinda C.; Navarro-Herrero, Leia; Neves, Verónica C.; Nicholls, David G.; Nicoll, Malcolm A. C.; Norris, Ken; Oppel, Steffen; Oro, Daniel; Owen, Ellie; Padget, Oliver; Paiva, Vitor H.; Pala, David; Pereira, Jorge M.; Péron, Clara; Petry, Maria V.; de Pina, Admilton; Pina, Ariete T. Moreira; Pinet, Patrick; Pistorius, Pierre A.; Pollet, Ingrid L.; Porter, Benjamin J.; Poupart, Timothée A.; Powell, Christopher D. L.; Proaño, Carolina B.; Pujol-Casado, Júlia; Quillfeldt, Petra; Quinn, John L.; Raine, Andre F.; Raine, Helen; Ramírez, Iván; Ramos, Jaime A.; Ramos, Raül; Ravache, Andreas; Rayner, Matt J.; Reid, Timothy A.; Robertson, Gregory J.; Rocamora, Gerard J.; Rollinson, Dominic P.; Ronconi, Robert A.; Rotger, Andreu; Rubolini, Diego; Ruhomaun, Kevin; Ruiz, Asunción; Russell, James C.; Ryan, Peter G.; Saldanha, Sarah; Sanz-Aguilar, Ana; Sardà-Serra, Mariona; Satgé, Yvan G.; Sato, Katsufumi; Schäfer, Wiebke C.; Schoombie, Stefan; Shaffer, Scott A.; Shah, Nirmal; Shoji, Akiko; Shutler, Dave; Sigurðsson, Ingvar A.; Silva, Monica C.; Small, Alison E.; Soldatini, Cecilia; Strøm, Hallvard; Surman, Christopher A.; Takahashi, Akinori; Tatayah, Vikash R. V.; Taylor, Graeme A.; Thomas, Robert J.; Thompson, David R.; Thompson, Paul M.; Thórarinsson, Thorkell L.; Vicente-Sastre, Diego; Vidal, Eric; Wakefield, Ewan D.; Waugh, Susan M.; Weimerskirch, Henri; Wittmer, Heiko U.; Yamamoto, Takashi; Yoda, Ken; Zavalaga, Carlos B.; Zino, Francis J.; Dias, Maria P.Plastic pollution is distributed patchily around the world’s oceans. Likewise, marine organisms that are vulnerable to plastic ingestion or entanglement have uneven distributions. Understanding where wildlife encounters plastic is crucial for targeting research and mitigation. Oceanic seabirds, particularly petrels, frequently ingest plastic, are highly threatened, and cover vast distances during foraging and migration. However, the spatial overlap between petrels and plastics is poorly understood. Here we combine marine plastic density estimates with individual movement data for 7137 birds of 77 petrel species to estimate relative exposure risk. We identify high exposure risk areas in the Mediterranean and Black seas, and the northeast Pacific, northwest Pacific, South Atlantic and southwest Indian oceans. Plastic exposure risk varies greatly among species and populations, and between breeding and non-breeding seasons. Exposure risk is disproportionately high for Threatened species. Outside the Mediterranean and Black seas, exposure risk is highest in the high seas and Exclusive Economic Zones (EEZs) of the USA, Japan, and the UK. Birds generally had higher plastic exposure risk outside the EEZ of the country where they breed. We identify conservation and research priorities, and highlight that international collaboration is key to addressing the impacts of marine plastic on wide-ranging species.
- No evidence of inbreeding depression despite a historical severe bottleneck in the endangered Bermuda petrel (Pterodroma cahow)Publication . Afonso, Rita O; Pina-Martins, Francisco; Friesen, Vicki; Sun, Zhengxin; Campioni, Letizia; Madeiros, Jeremy; Silva, Mónica CThe Bermuda petrel Pterodroma cahow is an island endemic seabird that belongs to the Procellariiformes, one of the most endangered orders of birds. Historical records suggest a significant population size decline following human settlement in Bermuda, bringing the species to near extinction. Since the 1950s, the population has been recovering aided by the implementation of an ongoing conservation plan. However, it still faces several threats, and negative genetic effects resulting from that drastic decline are to be expected, including inbreeding and genetic drift. We studied genetic diversity and levels of inbreeding, and their effects on individual fitness and mating choice. We also tested for a genetic signature of the recent demographic bottleneck. For this, we analyzed variation in thousands of nuclear single-nucleotide polymorphisms derived from double digest restriction site-associated DNA sequencing and 1 mitochondrial gene (cytochrome oxidase I). The results revealed that the Bermuda petrel suffered a recent genetic bottleneck and shows low mitochondrial diversity compared with other petrel species. Conversely, nuclear diversity was similar to that of other endangered petrels. Inbreeding levels were not high overall, although some individuals were highly inbred. However, we found no evidence that individual inbreeding or relatedness between mates affected hatching success, or that mate choice is influenced by kinship in this very small population.