" Feeding habits of seven cichlid species (Archocentrus octofasciatus, A. spilurus, " Cichlasoma" robertsoni , "C." synspilum , "C." urophthalmus , Petenia splendida, Thorichthys meeki) in Lake Caobas, southern Yucatan Peninsula, were studied. Samples were taken with enclosure and cast nets during the dry and rainy seasons of 1995 (day and night). The environment was characterized by measuring temperature, conductivity and pH. All individuals were below 41 mm SL (N=2xx). Frequency of occurrence and prey abundance were analyzed. Main prey items were chironomids, mites, copepods, cladocerans, and ostracods. The cichlids fed mainly on zooplankton, with the partial exceptions of P. splendida (piscivore), "C." synspilum and A. spilurus (herbivores). A cluster analysis showed that the most similar trophic spectra were those of T. meeki, "C." robertsoni and "C." salvini, which were also the least diverse. "C." synspilum and A. spilurus had an intermediate distance between their diets and those of other species. The species with the most distinctive feeding composition were P. splendida[/i (with the most diverse and equitable diet) and the omnivore A. octofasciatus (whose diet was the richest one). T. meeki showed quantitative diel, ontogenetic, and seasonal diet changes, but none between sexes. "C." robertsoni, "C." salvini and "C." synspilum differ in food habits in Caobas and in other localities, a fact that underscores the trophic adaptability of cichlids. Trophic overlap between cichlids in Caobas could imply absence of competition, perhaps because resources are abundant in the ecosystem "
Classification: Behavior, Central and North America.
Reference in bibliography for species (8)
- Cribroheros robertsoni referred to as "Cichlasoma" robertsoni [p. 503].
- Cryptoheros chetumalensis referred to as "Cichlasoma" spilurus.
- Mayaheros urophthalmus referred to as "Cichlasoma" urophthalmus [p. 503].
- Rocio octofasciata referred to as Archocentrus octofasciatus [p. 503].
- Trichromis salvini referred to as "Cichlasoma" salvini [p. 503].
- Vieja melanurus referred to as "Cichlasoma" synspilum [p. 503].
Valtierra-Vega, Maria Teresa & J. J. Schmitter-Soto. 2000. "Hábitos alimentarios de las mojarras (Perciformes: Cichlidae) de la laguna Caobas, Quintana Roo, México". Revista de Biologia Tropical. (n. 48); pp. 503-508 (crc01505) (abstract)