| confirmation of gnathostoma binucleatum almeyda-artigas, 1991, advanced third-stage larvae in tres palos lagoon, mexico, by morphological and molecular data. | advanced third-stage larvae of gnathostoma sp. corresponding to 6 morphotypes, distinguished on the basis of the shape of the cephalic hooklets, were collected from the muscle tissue of 5 species of freshwater fish (i.e., dormitator latifrons, eleotris picta, gobiomorus maculatus, ariopsis guatemalensis, and cichlasoma trimaculatum) in tres palos lagoon, guerrero, mexico. principal components analysis of 4 morphological characters cluster all samples in a single taxonomic group. a minimum amount ... | 2005 | 17089777 |
| [diversity, abundance and icthyofaunistic groups of the chantuto-panzacola lagoon-estuarine system, chiapas, méxico]. | in the chantuto-panzacola system, chiapas, méxico, a study of a fish community was carried out between march and november of 1997. from a total of 1456 fish collected, 31 species, 25 genera and 19 families had been identified. the diversity and abundance were high in march with h'= 2.67 bits/ind, d = 3.89 sp/ind, biomass 1.88 g/m2. density 0.25 ind/m2 and average weight 7.55 g/ind. significant differences were found between the ecological parameters and the environmental variables of the ecosyst ... | 2004 | 17357416 |
| changes on digestive enzymes during initial ontogeny in the three-spot cichlid cichlasoma trimaculatum. | a study was performed in order to understand the development of digestive enzymes during initial ontogeny of cichlasoma trimaculatum, for which the activity of acidic and alkaline proteases, lipases, amylases and phosphatases was determined by means of biochemical and electrophoretic analysis. our results showed that the activity of alkaline proteases, trypsin and chymotrypsin is present from day 6 after hatching (dah) during exogenous feeding with artemia nauplii. the activities of carboxypepti ... | 2015 | 25547606 |