| age-growth models for tilapia oreochromis aureus (perciformes, cichlidae) of the infiernillo reservoir, mexico and reproductive behaviour. | in presence of a decrease in the catch from infiernillo reservoir, michoacán-guerrero, mexico, age and growth of tilapia oreochromis aureus (steindachner 1864) were estimated, as indispensable attributes for fishery management. evaluations included scales and opercular bones readings and length frequency analysis. the population structure was determined too. due to the great variation of tilapia individual growth and with the objective to have reliable growth estimations, linearized, non-paramet ... | 2006 | 18494324 |
| aquatic ecotoxicology approaches in western mexico. | a series of bioindicator organisms for aquatic ecosystems are being maintained under laboratory conditions in order to analyze effects of pollution on aquatic wildlife and potential effects on human health. growth kinetics of algae pseudokirchneriella subcapitata was used to evaluate effects of the surfactant nonilphenol (np). brachionus calyciflorus was used to set up a model of endocrine disruption using the fungicide vinclozolin (vc). we exposed salamanders from the genus ambystoma sp., to di ... | 2007 | 17680492 |
| [trophic range of tilapia oreochromis aureus (perciformes: cichlidae) in infiernillo dam, michoacán-guerrero, mexico]. | the trophic spectrum of tilapia oreochromis aureus (steindachner 1864), was determined by stomach content analysis in 153 organisms collected during 1993 in michoacán-guerrero, méxico. the feeding status of the fish at the time of observation was evaluated by the examination of fat surrounding the gut, gastric replection and the condition coefficient. the quantitative evaluation of the food items was carried out by the combination of the following analysis: frequency of occurrence, volumetric me ... | 2000 | 11354955 |