Inter-sexual habitat and isotopic niche segregation of the endangered Monteiro’s storm-petrel during breeding

Paiva, Vítor H.; Ramos, Jaime A.; Nava, Cristina; Neves, Verónica C.; Bried, Joël; Magalhães, M. Clara F.

doi:10.1016/j.zool.2017.12.006

Cited by 23 publications

(24 citation statements)

References 45 publications

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“…Studies have also revealed that breeding adults and their reproductive success depend on the epi-and mesopelagic feeding resources around the Azores (Monteiro et al, 1996;Granadeiro et al, 1998;Magalhaes et al, 2008;Amorim et al, 2009;Neves V.C. et al, 2012;Paiva et al, 2018). Four out of seven species of sea turtles occur in Azorean waters ( Table 1).…”

Section: A Mid-atlantic Hub For Oceanic Megafaunamentioning

confidence: 99%

The Azores: A Mid-Atlantic Hotspot for Marine Megafauna Research and Conservation

et al. 2020

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The increasing public perception that marine megafauna is under threat is an outstanding incentive to investigate their essential habitats (EMH), their responses to human and climate change pressures, and to better understand their largely unexplained behaviors and physiology. Yet, this poses serious challenges such as the elusiveness and remoteness of marine megafauna, the growing scrutiny and legal impositions on their study, and difficulties in disentangling environmental drivers from human disturbance. We argue that advancing our knowledge and conservation on marine megafauna can and should be capitalized in regions where exceptional access to multiple species (i.e., megafauna 'hotspots') combines with the adequate legal framework, sustainable practices, and research capacity. The wider Azores region, hosting EMHs of all key groups of vulnerable or endangered vertebrate marine megafauna, is a singular EMH hotspot on a migratory crossroads, linking eastern and western Atlantic margins and productive boreal waters to tropical seas. It benefits from a sustainable development model based on artisanal fisheries with zero or minor megafauna bycatch, and one of the largest marine protected area networks in the Atlantic covering coastal, oceanic and deepsea habitats. Developing this model can largely ensure the future integrity of this EMH hotspot while fostering cuttingedge science and technological development on megafauna behavior, biologging and increased ocean observation, with potential major impacts on the Blue Growth agenda. An action plan is proposed.

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Section: A Mid-atlantic Hub For Oceanic Megafaunamentioning

confidence: 99%

The Azores: A Mid-Atlantic Hotspot for Marine Megafauna Research and Conservation

et al. 2020

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“…One of the obstacles to understand eventual sexual partitioning of food resources is related to limitations of widely used diet analysis methods, which often are unable to provide enough taxonomic resolution to detect subtle differences in prey consumption (e.g., Mata et al., 2016). This is the case, for instance, of methods widely used in avian ecology, including for instance the morphological identification of the remains of ingested food items (Bravo et al., 2016; Fonteneau et al., 2009; Hunter, 1983; Hunter & Brooke, 1992), direct observation (Catry et al., 2012), fatty acids and alcohols analysis (Owen et al., 2013), or stable isotope analysis (Blanco‐Fontao, Sandercock, Obeso, McNew, & Quevedo, 2013; Cleasby et al., 2015; Elliott et al., 2010; Hsu, Shaner, Chang, Ke, & Kao, 2014; Ludynia et al., 2013; Paiva et al., 2018; Phillips et al., 2011). The advent of high‐throughput DNA sequencing is making it possible to overcome the limitations of these methods, providing the ability to identify virtually all prey species consumed with unprecedent taxonomic resolution (Hope et al., 2014; Nielsen, Clare, Hayden, Brett, & Kratina, 2017; Razgour et al., 2011; Soininen et al., 2009).…”

Section: Introductionmentioning

confidence: 99%

High‐resolution multi‐marker DNA metabarcoding reveals sexual dietary differentiation in a bird with minor dimorphism

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et al. 2020

Ecology and Evolution

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Although sexual dietary differentiation is well known in birds, it is usually linked with significant morphological dimorphism between males and females, with lower differentiation reported in sexually monomorphic or only slightly dimorphic species. However, this may be an artifact of poor taxonomic resolution achieved in most conventional dietary studies, which may be unable to detect subtle intraspecific differentiation in prey consumption. Here, we show the power of multi‐marker metabarcoding to address these issues, focusing on a slightly dimorphic generalist passerine, the black wheatear Oenanthe leucura . Using markers from four genomic regions (18S, 16S, COI, and trn L), we analyzed fecal droppings collected from 93 adult black wheatears during the breeding season. We found that sexes were rather similar in bill and body features, though males had a slightly thicker bill and longer wings and tail than females. Diet was dominated in both sexes by a very wide range of arthropod species and a few fleshy fruits, but the overall diet diversity was higher for males than females, and there was a much higher frequency of occurrence of ants in female (58%) than male (29%) diets. We hypothesize that the observed sexual differentiation was likely related to females foraging closer to their offspring on abundant prey, while males consumed a wider variety of prey while foraging more widely. Overall, our results suggest that dietary sexual differentiation in birds may be more widespread than recognized at present and that multi‐marker DNA metabarcoding is a particularly powerful tool to unveiling such differences.

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“…Although the combination of these techniques shows a strong potential to study the trophic ecology of seabirds, it has only been used for a small number of storm-petrel species (e.g. Pollet et al 2014a;Halpin et al 2018;Paiva et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Metabarcoding, stables isotopes, and tracking: unraveling the trophic ecology of a winter-breeding storm petrel (Hydrobates castro) with a multimethod approach

et al. 2020

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Inter-sexual habitat and isotopic niche segregation of the endangered Monteiro’s storm-petrel during breeding

Cited by 23 publications

References 45 publications

The Azores: A Mid-Atlantic Hotspot for Marine Megafauna Research and Conservation

The Azores: A Mid-Atlantic Hotspot for Marine Megafauna Research and Conservation

High‐resolution multi‐marker DNA metabarcoding reveals sexual dietary differentiation in a bird with minor dimorphism

Metabarcoding, stables isotopes, and tracking: unraveling the trophic ecology of a winter-breeding storm petrel (Hydrobates castro) with a multimethod approach

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