NDLI: Alimentação de Rhinodoras dorbignyi (Kröyer, 1855) (Siluriformes: Doradidae) no rio Ibicuí, Rio Grande do Sul, Brasil - DOI: 10.4025/actascibiolsci.v29i2.446

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Alimentação de Rhinodoras dorbignyi (Kröyer, 1855) (Siluriformes: Doradidae) no rio Ibicuí, Rio Grande do Sul, Brasil - DOI: 10.4025/actascibiolsci.v29i2.446

Content Provider	Semantic Scholar
Author	Fagundes, Camila Kurzmann Behr, Everton Rodolfo Kotzian, Carla Bender
Copyright Year	2007
Abstract	The study of the feeding ecology of Rhinodoras dorbignyi was conducted in three sites of the Ibicui river, Rio Grande do Sul, Brazil, from December 1999 to January, 2003. The specimens were sampled bimonthly. The feeding spectrum was determined combining the frequency of the occurrence with the volume of each alimentary item, in order to obtain the feeding index (IAi). The spatial analysis was based on the diet and distribution of R. dorbignyi in the three sampling points, and also in their different biotopes. Temporal changes on diet and capture of the specimens were evaluated considering the seasons and the daily feeding rhythm. The intensity of spatial-temporal feeding intake was analyzed using the average stomach fullness. Significance level of 0.05 was used in the analyses. Ephemeroptera nymphs belonging to the family Polymitarcyidae represented the main feeding item (62.48%). The feeding spectrum of R. dorbignyi showed significant differences regarding sampling points, seasons, and biotopes. The species showed highest abundance in lotic environments, during the spring and summer and after sunset. No statistically significant results were observed with regard to spatial and temporal differences in feeding intake.
Starting Page	137
Ending Page	143
Page Count	7
File Format	PDF HTM / HTML
DOI	10.4025/actascibiolsci.v29i2.446
Volume Number	29
Alternate Webpage(s)	http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/download/446/304
Alternate Webpage(s)	https://doi.org/10.4025/actascibiolsci.v29i2.446
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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