2013
DOI: 10.1007/s00114-013-1027-4
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Trophic interactions of the endangered Southern river otter (Lontra provocax) in a Chilean Ramsar wetland inferred from prey sampling, fecal analysis, and stable isotopes

Abstract: Non-invasive methodological approaches are highly recommended and commonly used to study the feeding ecology of elusive and threatened mammals. In this study, we use multiple lines of evidence to assess the feeding strategies of the endangered Southern river otter, by determining seasonal prey availability (electrofishing), analysis of undigested prey remains (spraints), and the use of stable isotopes (δ(15)N and δ(13)C) in otter spraints (n = 262) and prey in a wetland ecosystem of southern Chile (39°49'S, 73… Show more

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Cited by 12 publications
(8 citation statements)
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“…Faeces counting has been a traditional non-invasive method used in numerous investigations because they are easily detected in the natural environment (Kasper, Bastazini, Salvi, & Grillo, 2008;Rheingantz et al, 2011;Franco et al, 2013;Biffi & Williams, 2017;Grajales-García et al, 2019). Faeces are generally deposited in conspicuous places along the shore of water bodies and can be clearly differentiated from those dropped by other carnivores (Delibes-Mateos, Díaz-Ruiz, Caro, & Ferreras, 2014;Juarez-Sanchez, Blake, & Hellgren, 2019).…”
Section: Discussionmentioning
confidence: 99%
“…Faeces counting has been a traditional non-invasive method used in numerous investigations because they are easily detected in the natural environment (Kasper, Bastazini, Salvi, & Grillo, 2008;Rheingantz et al, 2011;Franco et al, 2013;Biffi & Williams, 2017;Grajales-García et al, 2019). Faeces are generally deposited in conspicuous places along the shore of water bodies and can be clearly differentiated from those dropped by other carnivores (Delibes-Mateos, Díaz-Ruiz, Caro, & Ferreras, 2014;Juarez-Sanchez, Blake, & Hellgren, 2019).…”
Section: Discussionmentioning
confidence: 99%
“…Very little is known about the predators of this frog, and presently, it is only known that adults are consumed by the mammal huillín, Lontra provocax (González 2006, Franco et al 2013, the bird Martín pescador, Megaceryle torquata (Enrique Ziehlmann pers. comm.…”
Section: Systematics / Taxonomymentioning
confidence: 99%
“…As feces contain undigested portions of food items (Sponheimer et al, 2003 ), fecal isotopes are useful for documenting feeding behavior rather than nutritional intake and tissue synthesis (Blumenthal et al, 2012 ; Phillips & O'Connell, 2016 ; Salvarina et al, 2013 ). The non‐invasive nature of fecal sampling is well suited to working with elusive species, and stable isotopes of feces have been applied in studies of wild primates (Blumenthal et al, 2012 ; Codron et al, 2008 ; Phillips & O'Connell, 2016 ), otters (Franco et al, 2013 ), whales (Arregui et al, 2018 ), South American felids (Crowley et al, 2019 ; Magioli et al, 2014 ), coyotes (Reid & Koch, 2017 ), African savannah herbivores (Codron & Codron, 2009 ; Codron et al, 2011 ), and bats (Lam et al, 2013 ; Moyo & Jacobs, 2020 ; Painter et al, 2009 ; Royer et al, 2015 ), among others.…”
Section: Introductionmentioning
confidence: 99%