Trophic ecology of Saccodon dariensis (Pisces: Parodontidae) in Guatapé River tributaries, Magdalena River Basin, Colombia
ABSTRACT Objective. To study the trophic ecology of Saccodon dariensis in the Peñoles and El Cardal streams, Guatape River mid-basin, Magdalena River Basin, Colombia. Materials and methods. To compare differences in size between individuals from the two streams in terms of hydrologic periods, oral...
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| Format: | Article |
| Language: | English |
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Universidad de Cordoba
2014-01-01
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| Series: | Revista MVZ Cordoba |
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| Online Access: | http://revistas.unicordoba.edu.co/index.php/revistamvz/article/view/113 |
| _version_ | 1819137667361669120 |
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| author | Ana Restrepo-Gómez Néstor Mancera-Rodríguez |
| author_facet | Ana Restrepo-Gómez Néstor Mancera-Rodríguez |
| author_sort | Ana Restrepo-Gómez |
| collection | DOAJ |
| description | ABSTRACT
Objective. To study the trophic ecology of Saccodon dariensis in the Peñoles and El Cardal streams, Guatape River mid-basin, Magdalena River Basin, Colombia. Materials and methods. To compare differences in size between individuals from the two streams in terms of hydrologic periods, oral polymorphisms or sexes, an analysis of variance was conducted (ANOVA). Volume percentages, frequency of occurrence and the food importance index (FII) were determined; a principal component analysis (PCA) and an ANOVA was carried out to determine the diet differences between streams, climatic periods, oral polymorphism, sexes and developmental states, as well as a Mann-Whitney pairwise comparison test for each food category. Results. A significant difference was found in size between individuals of the two streams with different oral polymorphism. Algae are the most important food item (FII: 91.9%), followed by Trichoptera and insect remains (FII: 4.3%), and vegetal material (FII: 1.8%). The PCA did not indicate significant differences in diet between streams, climatic periods, oral polymorphisms, sexes or developmental states, but the ANOVA and Mann-Whitney pairwise comparison test indicated differences in oral morphotype, where individuals with a straight mouth consumed more vegetal material. We also observed different proportions in consumption of different algae genera, and increased consumption of insects in ontogeny, this being higher in individuals with a straight mouth. Conclusions. The species is algaevorous. The oral morphotypes of S. dariensis may be related to a trophic polymorphism that confers different trophic habits and differential access to the items that constitute their diet. |
| first_indexed | 2024-12-22T10:54:31Z |
| format | Article |
| id | doaj.art-a325ee85b9be489dbb4793ac66275890 |
| institution | Directory Open Access Journal |
| issn | 0122-0268 1909-0544 |
| language | English |
| last_indexed | 2024-12-22T10:54:31Z |
| publishDate | 2014-01-01 |
| publisher | Universidad de Cordoba |
| record_format | Article |
| series | Revista MVZ Cordoba |
| spelling | doaj.art-a325ee85b9be489dbb4793ac662758902022-12-21T18:28:41ZengUniversidad de CordobaRevista MVZ Cordoba0122-02681909-05442014-01-0119110.21897/rmvz.113Trophic ecology of Saccodon dariensis (Pisces: Parodontidae) in Guatapé River tributaries, Magdalena River Basin, ColombiaAna Restrepo-Gómez0Néstor Mancera-Rodríguez1Universidad Nacional de Colombia, Departamento de Ciencias Forestales. Posgrado en Bosques y Conservación Ambiental. Medellín, ColombiaUniversidad Nacional de Colombia, Departamento de Ciencias Forestales. Posgrado en Bosques y Conservación Ambiental. Medellín, ColombiaABSTRACT Objective. To study the trophic ecology of Saccodon dariensis in the Peñoles and El Cardal streams, Guatape River mid-basin, Magdalena River Basin, Colombia. Materials and methods. To compare differences in size between individuals from the two streams in terms of hydrologic periods, oral polymorphisms or sexes, an analysis of variance was conducted (ANOVA). Volume percentages, frequency of occurrence and the food importance index (FII) were determined; a principal component analysis (PCA) and an ANOVA was carried out to determine the diet differences between streams, climatic periods, oral polymorphism, sexes and developmental states, as well as a Mann-Whitney pairwise comparison test for each food category. Results. A significant difference was found in size between individuals of the two streams with different oral polymorphism. Algae are the most important food item (FII: 91.9%), followed by Trichoptera and insect remains (FII: 4.3%), and vegetal material (FII: 1.8%). The PCA did not indicate significant differences in diet between streams, climatic periods, oral polymorphisms, sexes or developmental states, but the ANOVA and Mann-Whitney pairwise comparison test indicated differences in oral morphotype, where individuals with a straight mouth consumed more vegetal material. We also observed different proportions in consumption of different algae genera, and increased consumption of insects in ontogeny, this being higher in individuals with a straight mouth. Conclusions. The species is algaevorous. The oral morphotypes of S. dariensis may be related to a trophic polymorphism that confers different trophic habits and differential access to the items that constitute their diet.http://revistas.unicordoba.edu.co/index.php/revistamvz/article/view/113Algaeconservationfish feedingpolymorphism |
| spellingShingle | Ana Restrepo-Gómez Néstor Mancera-Rodríguez Trophic ecology of Saccodon dariensis (Pisces: Parodontidae) in Guatapé River tributaries, Magdalena River Basin, Colombia Revista MVZ Cordoba Algae conservation fish feeding polymorphism |
| title | Trophic ecology of Saccodon dariensis (Pisces: Parodontidae) in Guatapé River tributaries, Magdalena River Basin, Colombia |
| title_full | Trophic ecology of Saccodon dariensis (Pisces: Parodontidae) in Guatapé River tributaries, Magdalena River Basin, Colombia |
| title_fullStr | Trophic ecology of Saccodon dariensis (Pisces: Parodontidae) in Guatapé River tributaries, Magdalena River Basin, Colombia |
| title_full_unstemmed | Trophic ecology of Saccodon dariensis (Pisces: Parodontidae) in Guatapé River tributaries, Magdalena River Basin, Colombia |
| title_short | Trophic ecology of Saccodon dariensis (Pisces: Parodontidae) in Guatapé River tributaries, Magdalena River Basin, Colombia |
| title_sort | trophic ecology of saccodon dariensis pisces parodontidae in guatape river tributaries magdalena river basin colombia |
| topic | Algae conservation fish feeding polymorphism |
| url | http://revistas.unicordoba.edu.co/index.php/revistamvz/article/view/113 |
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