%0 Journal Article
%T Espectro tr車fico del bagre Ictalurus punctatus (Silurifomes: Ictaluridae), en la presa L芍zaro C芍rdenas, Ind谷, Durango, M谷xico Trophic spectrum of the catfish Ictalurus punctatus (Siluriformes: Ictaluridae), in the L芍zaro C芍rdenas reservoir, Ind谷, Durango, Mexico
%A Gabriel Fernando Cardoza Mart赤nez
%A Jos谷 Luis Estrada Rodr赤guez
%A Fernando Alonzo Rojo
%A Carmen Leticia Mar Tovar
%J Hidrobiol車gica
%D 2011
%I Universidad Aut車noma Metropolitana, Unidad Iztapalapa
%X Se analiz車 el contenido de 240 est車magos de Ictalurus punctatus (Rafinesque, 1818), colectados de 2006 a 2007, con el objetivo de determinar su espectro tr車fico, su variaci車n por talla y 谷poca clim芍tica. Los contenidos estomacales se analizaron en laboratorio y los organismos se determinaron hasta nivel de orden. Los datos obtenidos fueron analizados por m谷todos cuantitativos y cualitativos. Los 車rdenes m芍s frecuentes fueron Perciformes y Atheriniformes que corresponden a peces forraje, as赤 como algas verdes del orden Charales. Adem芍s, se encontraron otros siete 車rdenes de invertebrados: Schizodonta, Odonata, Himenoptera, Orthoptera, Hemiptera, Homoptera y Scorpionida, adem芍s de dos 車rdenes de plantas: Poales y Fabales. El orden Perciforme constituy車 casi la mitad del total del peso del contenido estomacal, seguido por los 車rdenes Atheriniforme y Charales. En las estaciones de verano e invierno se present車 el mayor n迆mero de est車magos vac赤os, mientras que en primavera se encontr車 el mayor n迆mero de est車magos llenos. La cantidad de alimento ingerida en la estaci車n de invierno fue significativamente menor que en las dem芍s estaciones. El principal alimento en primavera, verano y oto o, fueron los peces, mientras que en invierno hubo mayor preferencia por las algas. Having the objective of determining their trophic spectrum and their variations within a year, the contents of 240 stomachs of Ictalurus punctatus (Rafinesque, 1818) were analyzed from 2006 to 2007. The items of the stomach contents were determined to the order level. The data was analyzed by different quantitative and qualitative methods. The most frequent orders were Perciforms and Atheriniforms corresponding to forage fish, along with green algae of the Charales order. Also, seven orders of invertebrates were found: Schizodonta, Odonata, Himenoptera, Orthoptera, Hemiptera, Homoptera and Scorpionida, and two orders of plants: Poales and Fabales. The Perciform order made up almost half of the total weight of the stomach contents, followed by the Atheriniform and the Charales orders. The greatest number of empty stomachs showed up during summer and winter, while the greatest number of filled-up stomachs was found during the spring season. The quantity of food consumed during winter time was significantly lower than the amount consumed during all other seasons. The kind of food consumed during the spring, summer and autumn was mainly fish, while algae were preferred during the winter season.
%K Alimentaci車n
%K bagre
%K embalse
%K Durango
%K estaciones del a o
%K Feeding
%K catfish
%K reservoir
%K Durango
%K seasons
%U http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0188-88972011000200011