NDLI: Feeding ecology and basal food sources that sustain the Paradoxal frog Pseudis minuta: a multiple approach combining stomach content, prey availability, and stable isotopes

Content Provider	Springer Nature Link
Author	Huckembeck, Sonia Loebmann, Daniel Albertoni, Edelti F. Hefler, Sonia M. Oliveira, Mauro C. L. M. Garcia, Alexandre M.
Copyright Year	2014
Abstract	In the present study, we investigated ontogenetic diet shifts, feeding strategy, prey preferences, and basal food sources that sustain the Paradoxal frog (Pseudis minuta) based on stomach content, prey availability, and stable isotope (δ13C, δ15N) approaches. The feeding strategy analysis showed that the population can be considered a generalist species with each individual displaying a marked opportunism for different preys. Trophic positions estimated using nitrogen isotopic ratio (δ15N) revealed that tadpoles are primary consumers, but post-metamorphic individuals shifted to secondary and tertiary trophic levels as they increase in body size. A stable isotopic mixing model revealed that most of the carbon (0.61–0.72) sustaining the post-metamorphic P. minuta is derived from the aquatic rather than the adjacent terrestrial environment. This finding suggests that the post-metamorphic P. minuta is strongly dependent on carbon sources that primarily originate in aquatic systems, regardless of the terrestrial or aquatic origins of the arthropods in its diet. Our results indicated that this species is a generalist-opportunistic predator that derives most of their carbon sources from the aquatic environment where it shows preference for aquatic preys with higher individual biomasses.
Starting Page	253
Ending Page	264
Page Count	12
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	740
Issue Number	1
e-ISSN	15735117
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-08-31
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Diet Food chain Optimal foraging Pseudis minuta Seasonal variation Freshwater & Marine Ecology Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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