Ontogenetic diet shifts: an additional mechanism for successful invasion of a piranha species in a Neotropical floodplain
Abstract Ontogenetic shifts in food preference reduces intraspecific 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 phylogen...
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| Format: | Article |
| Language: | English |
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Academia Brasileira de Ciências
2021-09-01
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| Series: | Anais da Academia Brasileira de Ciências |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000701007&tlng=en |
| _version_ | 1830190647414358016 |
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| author | GUSTAVO H. ZAIA ALVES BRUNO R.S. FIGUEIREDO GISLAINE I. MANETTA EVANILDE BENEDITO |
| author_facet | GUSTAVO H. ZAIA ALVES BRUNO R.S. FIGUEIREDO GISLAINE I. MANETTA EVANILDE BENEDITO |
| author_sort | GUSTAVO H. ZAIA ALVES |
| collection | DOAJ |
| description | Abstract Ontogenetic shifts in food preference reduces intraspecific 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 signatures. Carbon stable isotope was not correlated to fish length, but positive significant correlation between δ15N values and fish length was found for the non-native piranha. Also, immature and adult S. marginatus showed low isotopic niche overlap. The correlation between fish length and δ15N, and the low trophic overlap between immature and adult, indicate that the non-native S. marginatus had ontogenetic shifts in food preference, which may be viewed as an additional mechanism underlying its successful establishment in the upper Paraná River. Our findings indicate that ontogenetic shifts in food preference may be an invasive trait that facilitates the establishment of non-native fish species in tropical aquatic systems. |
| first_indexed | 2024-12-17T23:25:22Z |
| format | Article |
| id | doaj.art-771203b7b8eb43d28e49b9d9759b9f71 |
| institution | Directory Open Access Journal |
| issn | 1678-2690 |
| language | English |
| last_indexed | 2024-12-17T23:25:22Z |
| publishDate | 2021-09-01 |
| publisher | Academia Brasileira de Ciências |
| record_format | Article |
| series | Anais da Academia Brasileira de Ciências |
| spelling | doaj.art-771203b7b8eb43d28e49b9d9759b9f712022-12-21T21:28:47ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências1678-26902021-09-0193410.1590/0001-3765202120190868Ontogenetic diet shifts: an additional mechanism for successful invasion of a piranha species in a Neotropical floodplainGUSTAVO H. ZAIA ALVEShttps://orcid.org/0000-0002-9233-2824BRUNO R.S. FIGUEIREDOhttps://orcid.org/0000-0002-8750-808XGISLAINE I. MANETTAhttps://orcid.org/0000-0003-3232-0984EVANILDE BENEDITOhttps://orcid.org/0000-0002-3494-9949Abstract Ontogenetic shifts in food preference reduces intraspecific 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 signatures. Carbon stable isotope was not correlated to fish length, but positive significant correlation between δ15N values and fish length was found for the non-native piranha. Also, immature and adult S. marginatus showed low isotopic niche overlap. The correlation between fish length and δ15N, and the low trophic overlap between immature and adult, indicate that the non-native S. marginatus had ontogenetic shifts in food preference, which may be viewed as an additional mechanism underlying its successful establishment in the upper Paraná River. Our findings indicate that ontogenetic shifts in food preference may be an invasive trait that facilitates the establishment of non-native fish species in tropical aquatic systems.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000701007&tlng=encoexistenceSerrasalmusParaná Riverstable isotopes |
| spellingShingle | GUSTAVO H. ZAIA ALVES BRUNO R.S. FIGUEIREDO GISLAINE I. MANETTA EVANILDE BENEDITO Ontogenetic diet shifts: an additional mechanism for successful invasion of a piranha species in a Neotropical floodplain Anais da Academia Brasileira de Ciências coexistence Serrasalmus Paraná River stable isotopes |
| title | Ontogenetic diet shifts: an additional mechanism for successful invasion of a piranha species in a Neotropical floodplain |
| title_full | Ontogenetic diet shifts: an additional mechanism for successful invasion of a piranha species in a Neotropical floodplain |
| title_fullStr | Ontogenetic diet shifts: an additional mechanism for successful invasion of a piranha species in a Neotropical floodplain |
| title_full_unstemmed | Ontogenetic diet shifts: an additional mechanism for successful invasion of a piranha species in a Neotropical floodplain |
| title_short | Ontogenetic diet shifts: an additional mechanism for successful invasion of a piranha species in a Neotropical floodplain |
| title_sort | ontogenetic diet shifts an additional mechanism for successful invasion of a piranha species in a neotropical floodplain |
| topic | coexistence Serrasalmus Paraná River stable isotopes |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000701007&tlng=en |
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