Boris Marioni
National Institute of Amazonian Research
27 Papers
181 Citations
Boris Marioni is an academic researcher from National Institute of Amazonian Research. The author has contributed to research in topics: Melanosuchus niger & Population. The author has an hindex of 10, co-authored 24 publications. Previous affiliations of Boris Marioni include Federal University of Amazonas & Amazon.com.
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Papers
Feeding Behavior of Two Sympatric Caiman Species, Melanosuchus niger and Caiman crocodilus, in the Brazilian Amazon
TL;DR: It is found that water temperature had a negative effect on trapping by M. niger; and water depth did not affect feeding behaviors in either species; and there is probably little interspecific competition for food during the dry season.
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Mercury Concentration in the Spectacled Caiman and Black Caiman (Alligatoridae) of the Amazon: Implications for Human Health
Larissa Schneider,Reinaldo Pacheco Peleja,Augusto Kluczkovski,Guilherme Martinez Freire,Boris Marioni,Richard C. Vogt,Ronis Da Silveira +6 more
TL;DR: By calculating daily consumptions limits and number of meals per month that can be safely consumed, it is found that consumers who eat caimans frequently may be at risk for Hg-related health problems.
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Population genetic analysis of Caiman crocodilus (Linnaeus, 1758) from South America
William Rangel Vasconcelos,Tomas Hrbek,Tomas Hrbek,Ronis Da Silveira,Benoit de Thoisy,Boris Marioni,Izeni Pires Farias +6 more
TL;DR: The genetic structure of Caiman crocodilus was investigated using a 1085 bp mtDNA fragment of the cytochrome b gene and the observed genetic patterns are compatible with the ecology of C. crocodilus, and history of human exploitation.
Body size is more important than diet in determining stable-isotope estimates of trophic position in crocodilians
TL;DR: Dietary information from the literature on the four Amazonian crocodilians was analysed and ontogenetic shifts in dietary-based trophic position (TPdiet) were minimal, and differed from those estimated using δ15N data (TPSIA), which may change the way that researchers estimate trophIC position of organisms that show orders of magnitude differences in size across their life span.
Opportunistic top predators partition food resources in a tropical freshwater ecosystem
TL;DR: The results show that differences in crocodilian diets likely result from prey preferences and not only from habitat selection, and suggest that some species of crocodilians may be less generalist than traditionally thought and their influence on terrestrial or aquatic food webs might be species specific.
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