2021
DOI: 10.1590/0001-3765202120190868
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Ontogenetic diet shifts: an additional mechanism for successful invasion of a piranha species in a Neotropical floodplain

Abstract: Ontogenetic shifts in food preference reduces intraspecifi c competition as immature individuals eat different food types than adults. This diet plasticity could facilitate species' ability to successfully invade and establish itself in a new environment, even when co-occurring with phylogenetically close species. Here, ontogenetic diet shifts of a non-native piranha species (Serrasalmus marginatus) was tested by analyzing the relationship between its body length and the carbon and nitrogen stable isotope sign… Show more

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Cited by 2 publications
(7 citation statements)
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References 39 publications
(20 reference statements)
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“…Therefore, this characteristic of A. crassipinnis may be one that may have favored its establishment in the upper Paraná River floodplain. The same pattern was observed for Cichla kelberi Kullander, Ferreira, 2006(Gomiero et al, 2010 and Serrasalmus marginatus (Alves et al, 2021), two other piscivorous fish species introduced in the study area.…”
Section: Discussionsupporting
confidence: 78%
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“…Therefore, this characteristic of A. crassipinnis may be one that may have favored its establishment in the upper Paraná River floodplain. The same pattern was observed for Cichla kelberi Kullander, Ferreira, 2006(Gomiero et al, 2010 and Serrasalmus marginatus (Alves et al, 2021), two other piscivorous fish species introduced in the study area.…”
Section: Discussionsupporting
confidence: 78%
“…In the juvenile stage (Class I), individuals consumed a wider variety of invertebrates. Ontogenetic diet shifts are well known in fishes (Wootton, 1999;Amundsen et al, 2003;) and may reduce intraspecific competition through diet segregation (Canavero et al, 2013;Alves et al, 2021). The relative proportions of the body and other anatomical characteristics developed during growth are the key factors determining the type and food size that fish predators will prey on (Werner, 1974;Keast, 1985;Scharf et al, 2000;Huskey & Turingan, 2001).…”
Section: Discussionmentioning
confidence: 99%
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“…Seasonal changes in fish diet are especially related to the entry of allochthonous resources into the aquatic environment (Quirino et al 2017). Ontogenetic variation is an important factor to be verified in the diet of fish, usually accompanied by morphological changes throughout the development of individuals (Hahn et al 2000;Bozza and Hahn 2010;Alves et al 2021). Feeding tactics can change as fish grow, due to physical limitations regarding prey and food selectivity (Wainwrigth and Richard, 1995;Arim et al 2010;Bozza and Hahn 2010;Keppeler et al 2015;Alves et al 2021).…”
Section: Introductionmentioning
confidence: 99%