Ecological implications of unprecedented warm water anomalies on interannual prey preferences and foraging areas of Guadalupe fur seals

The Guadalupe fur seal (GFS) currently is recovering from near extinction and prey availability is an important factor. Scat and stable isotope analyses (SIA) were used to assess GFS foraging on Guadalupe Island during 2013–2016. This period was characterized by normal (2013) ocean temperatures foll...

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Veröffentlicht in:	Marine mammal science 2020-10, Vol.36 (4), p.1254-1270
Hauptverfasser:	Amador‐Capitanachi, María José, Moreno‐Sánchez, Xchel G., Ventura‐Domínguez, Phalom Denohi, Juárez‐Ruiz, Ariadna, González‐Rodríguez, Eduardo, Gálvez, Casandra, Norris, Tenaya, Elorriaga‐Verplancken, Fernando R.
Format:	Artikel
Sprache:	eng
Schlagworte:	Anomalies Aquatic mammals Arctocephalus townsendi Climate change El Niño Environmental impact Foraging fur seals Guadalupe Island Isotope ratios isotopic niche Life Sciences & Biomedicine Marine & Freshwater Biology Marine mammals Marine molluscs Neon Niches Ocean temperature Offshore Prey Puppies scat analysis Science & Technology Seals Squid Stable isotopes The Blob Trophic levels Variance analysis Warm water Water temperature Zoology
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Zusammenfassung:	The Guadalupe fur seal (GFS) currently is recovering from near extinction and prey availability is an important factor. Scat and stable isotope analyses (SIA) were used to assess GFS foraging on Guadalupe Island during 2013–2016. This period was characterized by normal (2013) ocean temperatures followed by warm conditions (2014–2016). Scat samples (~40/year) were collected for prey identification. Additionally, lanugo samples from 1‐month‐old pups (50/year) were processed for SIA (δ13C/δ15N). Interannual prey preferences were identified (ANOSIM, p
ISSN:	0824-0469 1748-7692
DOI:	10.1111/mms.12718