Analysis of stomach contents of freshwater stingrays (Elasmobranchii, Potamotrygonidae) from the middle Negro River, Amazonas, Brazil
Potamotrygonid stingrays are restricted to Neotropical rivers and information on their diet remains scarce. Thus, the prey composition of four freshwater stingray species from the middle Negro River was studied using stomach contents analysis: Potamotrygon motoro (n=40), Potamotrygon orbignyi (n=27)...
| Autor principal: | Shibuya, Akemi |
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| Outros Autores: | Araújo, Maria Lucia G., Zuanon, Jansen |
| Grau: | Artigo |
| Idioma: | pt_BR |
| Publicado em: |
Pan-American Journal of Aquatic Sciences
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18379 |
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oai:repositorio:1-18379 |
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oai:repositorio:1-18379 Analysis of stomach contents of freshwater stingrays (Elasmobranchii, Potamotrygonidae) from the middle Negro River, Amazonas, Brazil Análise dos conteúdos estomacais de espécies de raias de água doce (Elasmobranchii, Potamotrygonidae) do médio rio Negro, Amazonas, Brasil Shibuya, Akemi Araújo, Maria Lucia G. Zuanon, Jansen Anisoptera (dragonflies) Arthropoda Crustacea Dasyatidae Decapoda (crustacea) Elasmobranchii Gomphidae Hexapoda Palaemonidae Paratrygon Aiereba Potamotrygon Potamotrygon Motoro Potamotrygon Orbignyi Potamotrygonidae Trichodactylidae Potamotrygonid stingrays are restricted to Neotropical rivers and information on their diet remains scarce. Thus, the prey composition of four freshwater stingray species from the middle Negro River was studied using stomach contents analysis: Potamotrygon motoro (n=40), Potamotrygon orbignyi (n=27), Potamotrygon sp. "cururu" (n=26), and Paratrygon aiereba (n=34). Prey items were identified up to the lowest taxonomic level possible and analyzed with the Index of Relative Importance (%IRI). Teleosteans, crustaceans and insect larvae were consumed by all species in distinct proportions. Potamotrygon motoro fed mainly on palaemonid shrimps (33.8%) and trichodactylid crabs (48.7%). Stomach contents of Potamotrygon orbignyi were composed principally by insects (96.4%), with predominance of gomphid dragonfly larvae. Potamotrygon sp. "cururu" fed on crustaceans (shrimps and crabs: 49.4%) and insect larvae (30.2%). Paratrygon aiereba consumed mainly teleosteans (94.8%), which were composed by a wide variety of species. These results suggest a food partitioning among the four freshwater stingray species, based on the use of different microhabitats and foraging substrates. Different mechanisms of prey detection and capture may also contribute to the differences of prey composition in the stomach contents of these stingray species. 2020-06-15T21:54:20Z 2020-06-15T21:54:20Z 2009 Artigo https://repositorio.inpa.gov.br/handle/1/18379 pt_BR Volume 4, Número 4, Pags. 466-475 Restrito Pan-American Journal of Aquatic Sciences |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
pt_BR |
| topic |
Anisoptera (dragonflies) Arthropoda Crustacea Dasyatidae Decapoda (crustacea) Elasmobranchii Gomphidae Hexapoda Palaemonidae Paratrygon Aiereba Potamotrygon Potamotrygon Motoro Potamotrygon Orbignyi Potamotrygonidae Trichodactylidae |
| spellingShingle |
Anisoptera (dragonflies) Arthropoda Crustacea Dasyatidae Decapoda (crustacea) Elasmobranchii Gomphidae Hexapoda Palaemonidae Paratrygon Aiereba Potamotrygon Potamotrygon Motoro Potamotrygon Orbignyi Potamotrygonidae Trichodactylidae Shibuya, Akemi Analysis of stomach contents of freshwater stingrays (Elasmobranchii, Potamotrygonidae) from the middle Negro River, Amazonas, Brazil |
| topic_facet |
Anisoptera (dragonflies) Arthropoda Crustacea Dasyatidae Decapoda (crustacea) Elasmobranchii Gomphidae Hexapoda Palaemonidae Paratrygon Aiereba Potamotrygon Potamotrygon Motoro Potamotrygon Orbignyi Potamotrygonidae Trichodactylidae |
| description |
Potamotrygonid stingrays are restricted to Neotropical rivers and information on their diet remains scarce. Thus, the prey composition of four freshwater stingray species from the middle Negro River was studied using stomach contents analysis: Potamotrygon motoro (n=40), Potamotrygon orbignyi (n=27), Potamotrygon sp. "cururu" (n=26), and Paratrygon aiereba (n=34). Prey items were identified up to the lowest taxonomic level possible and analyzed with the Index of Relative Importance (%IRI). Teleosteans, crustaceans and insect larvae were consumed by all species in distinct proportions. Potamotrygon motoro fed mainly on palaemonid shrimps (33.8%) and trichodactylid crabs (48.7%). Stomach contents of Potamotrygon orbignyi were composed principally by insects (96.4%), with predominance of gomphid dragonfly larvae. Potamotrygon sp. "cururu" fed on crustaceans (shrimps and crabs: 49.4%) and insect larvae (30.2%). Paratrygon aiereba consumed mainly teleosteans (94.8%), which were composed by a wide variety of species. These results suggest a food partitioning among the four freshwater stingray species, based on the use of different microhabitats and foraging substrates. Different mechanisms of prey detection and capture may also contribute to the differences of prey composition in the stomach contents of these stingray species. |
| format |
Artigo |
| author |
Shibuya, Akemi |
| author2 |
Araújo, Maria Lucia G. Zuanon, Jansen |
| author2Str |
Araújo, Maria Lucia G. Zuanon, Jansen |
| title |
Analysis of stomach contents of freshwater stingrays (Elasmobranchii, Potamotrygonidae) from the middle Negro River, Amazonas, Brazil |
| title_short |
Analysis of stomach contents of freshwater stingrays (Elasmobranchii, Potamotrygonidae) from the middle Negro River, Amazonas, Brazil |
| title_full |
Analysis of stomach contents of freshwater stingrays (Elasmobranchii, Potamotrygonidae) from the middle Negro River, Amazonas, Brazil |
| title_fullStr |
Analysis of stomach contents of freshwater stingrays (Elasmobranchii, Potamotrygonidae) from the middle Negro River, Amazonas, Brazil |
| title_full_unstemmed |
Analysis of stomach contents of freshwater stingrays (Elasmobranchii, Potamotrygonidae) from the middle Negro River, Amazonas, Brazil |
| title_sort |
analysis of stomach contents of freshwater stingrays (elasmobranchii, potamotrygonidae) from the middle negro river, amazonas, brazil |
| publisher |
Pan-American Journal of Aquatic Sciences |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18379 |
| _version_ |
1787142110228512768 |
| score |
11.755432 |