Laysan Albatross on Guadalupe Island, México: Current Status and Conservation Actions

Hernández-Montoya, Julio; Luna-Mendoza, Luciana; Aguirre-Muñoz, Alfonso; Méndez-Sánchez, Federico; Félix-Lizárraga, María; Barredo-Barberena, J. M.

doi:10.3398/042.007.0101

Cited by 8 publications

(13 citation statements)

References 47 publications

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“…An oil spill near this island or introduction of invasive species (in addition to the cats already present) could seriously threaten the survival of these populations (Croxall et al 2012, Doherty et al 2016). The feral goat population was eradicated between 2003-2006(Aguirre-Muñoz et al 2011); a program to control feral cats has been carried out since 2003 (Hernández-Montoya et al 2014). Given the importance of Guadalupe for storm-petrels, it is key to continue with such long-term conservation efforts.…”

Section: Management Implicationsmentioning

confidence: 99%

Sympatric population divergence within a highly pelagic seabird species complex (Hydrobates spp.)

Taylor

Bailie

Gulavita

et al. 2018

Journal of Avian Biology

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Both physical and non-physical barriers can restrict gene flow among seabird populations. Understanding the relative importance of non-physical barriers, such as breeding phenology, is key to understanding seabird biodiversity. We investigated drivers of diversification in the Leach's storm-petrel species complex (Hydrobates spp.) by examining population genetic structure across its range. Variation in the mitochondrial control region and six microsatellite loci was assayed in birds sampled from breeding colonies throughout the North Atlantic and North Pacific (H. leucorhoa leucorhoa), as well as from San Benito Islands (H. l. chapmani), and two seasonal populations in Guadalupe (summer breeding H. socorroensis and winter breeding H. cheimomnestes), Mexico. Weak but significant differentiation was found between populations of H. l. leucorhoa breeding in the Atlantic versus North Pacific, as well as between H. l. chapmani and H. l. leucorhoa, and between H. socorroensis and H. cheimomnestes within Guadalupe. In contrast, strong differentiation in both mitochondrial DNA and microsatellites was found between H. leucorhoa and both H. socorroensis and H. cheimomnestes. Phylogenetic reconstruction suggested the Guadalupe seasonal breeding populations are sister taxa, at least in their mitochondrial DNA. Non-physical barriers to gene flow appear to be more important than physical barriers in driving divergence within the Leach's storm-petrel species complex. In particular, allochronic speciation may have occurred between the seasonal populations within Guadalupe. Further work should include higher resolution sequencing to confirm results, and an increased sampling effort, particularly within the California area, to fully resolve the relationship between H. l. leucorhoa and H. l. chapmani.

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Section: Management Implicationsmentioning

confidence: 99%

Sympatric population divergence within a highly pelagic seabird species complex (Hydrobates spp.)

Taylor

Bailie

Gulavita

et al. 2018

Journal of Avian Biology

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“…GPS tagging was carried out when the albatross was captured for blood sample collection and morphometric measurement. The GPS monitoring period took place during the breeding season, which lasts from November to June [20,46], and included the incubation, brooding, and chick-rearing stages. Albatross on GI are distributed between three different colonies: the Zapato islet, the Morro Prieto islet, and the main island, which are located 70–210 m above sea level [20,40] (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

“…The Guadalupe Island breeding colony of Laysan albatross has been monitored since 2003 [22]. This population is in continuous growth and has consolidated to become the most important population of Laysan albatross in the eastern Pacific [20,22]. The conservation and restoration of the Guadalupe Island population is the result of actions to control and eradicate invasive alien species that have been carried out by Grupo de Ecología y Conservación de Islas, A.C., during the last 15 years [20].…”

Section: Methodsmentioning

confidence: 99%

“…This population is in continuous growth and has consolidated to become the most important population of Laysan albatross in the eastern Pacific [20,22]. The conservation and restoration of the Guadalupe Island population is the result of actions to control and eradicate invasive alien species that have been carried out by Grupo de Ecología y Conservación de Islas, A.C., during the last 15 years [20]. In general, Laysan albatross are long-lived [47] with high apparent survival between 0.93 and 0.99 [48].…”

Section: Methodsmentioning

confidence: 99%

“…Although the Laysan albatross mostly in the Central Pacific (Northwestern Hawaiian Islands), this species colonized new sites in the eastern Pacific in 1983, specifically, Guadalupe Island, Alijos Island, and the Revillagigedo Archipelago (the islands of Roca Partida, San Benedicto, and Clarión) [20,21]. This expansion of the Laysan albatross breeding range resulted in high oceanic spatial segregation, reflected in differences between the two populations based on foraging habitat, behavior, and reproductive success [22].…”

Section: Introductionmentioning

confidence: 99%

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Sexual Dimorphism and Foraging Trips of the Laysan Albatross (Phoebastria immutabilis) on Guadalupe Island

Montoya

Juárez-Rodríguez

Méndez-Sánchez

et al. 2019

Animals

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Sexual dimorphism in the Laysan albatross (Phoebastria immutabilis) on Guadalupe Island was evaluated during the breeding seasons of 2015–2018 by measuring and comparing 10 morphological attributes: cranial length, bill length, nostril length, cranial width, bill height, bill width, tarsus length, closed wing length, opened wing length, and wingspan length in reproductive adults (n = 135). Males were larger than females across all traits (Student’s t-test, p < 0.05, p < 0.05). We created a logistic model using stepwise regression to predict sex based on morphological variables. This model indicated four significant morphological predictor variables (z < 0.05) and was able to successfully predict the sex of P. immutabilis individuals in more than 90% of the cases. Based on these predictor variables, a web app was developed to determine the sex of the Laysan albatross in the field, providing a non-invasive method for rapid data collection that reduces costs and handling times while improving conservation efforts. We tracked Laysan albatross (n = 36) during breeding seasons and found no significant differences between females and males for either trip length (GLMM, F = 0.017, DF = 1, 1, p = 0.917 > 0.05) or maximum trip distance (GLMM, F = 0.374, DF = 1, 1, p = 0.651 > 0.05). Our results suggest that both sexes show a strong preference to travel to highly productive coastal waters northeast of the breeding colony that are influenced by the California Current. The present research will serve to establish a baseline to protect this species on Guadalupe Island and highlights the importance of understanding sexual dimorphism in at-risk seabird species.

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Invasive Alien Species in Mexico

Koleff

Alfaro

Golubov

et al. 2021

Invasive Alien Species

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Laysan Albatross on Guadalupe Island, México: Current Status and Conservation Actions

Cited by 8 publications

References 47 publications

Sympatric population divergence within a highly pelagic seabird species complex (Hydrobates spp.)

Sympatric population divergence within a highly pelagic seabird species complex (Hydrobates spp.)

Sexual Dimorphism and Foraging Trips of the Laysan Albatross (Phoebastria immutabilis) on Guadalupe Island

Invasive Alien Species in Mexico

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