La anchoveta Engraulis mordax es un importante recurso pesquero. En este trabajo se evaluó la posibilidad de distinguir las poblaciones central y sureita de la anchoveta mediante sus cariotipos y su patrón de bandas C. El cariotipo de ambas poblaciones está formado por 48 cromosomas acrocéntricos y coincide con el publicado por Ohno et al. (1968) probablemente proveniente de la población central. El número cromosómico común, la totalidad de sus cromosomas de tipo unirrámeo, la concordancia en sus patrones de bandas C y la ausencia de diferencias estadísticamente significativas en las tallas cromosómicas entre ambas poblaciones, no proporcionan rasgos que puedan ser considerados distintivos de las poblaciones analizadas.
The performance of aerobic submerged packed bed reactors was studied for the treatment of domestic wastewater using different kinds of packing materials with high specific areas (760-1,200 m(2)/m(3)). The tested materials were ceramic spheres, crushed tezontle, grains of high density polyethylene (HDPE), of low density polyethylene (LDPE) and of polypropylene (PP), cubes of polyurethane (PU) and polyethylene tape (SESSIL). The bioreactors were operated in continuous regime, applying organic loads in the range of 0.8-6.0 g COD.m(-2).d(-1). The obtained specific COD removal rates were very similar in all the reactors when they were operated at organic loads up to 2.0 g COD.m(-2).d(-1), after which differences in effectiveness appeared and the best results were determined in the reactors with SESSIL, LDPE and PU. Very low TSS, O&G and turbidity were obtained in all the effluents. The NH(3)-N and TN removals were dependent on the dissolved oxygen (DO) concentration and the removals at DO of 5 mg/l were 84-99% and 61-74% respectively. The best removals were determined in the reactors with PU, SESSIL and LDPE. The reactor with tezontle had also a good performance when operated with loads up to 1.0 g TN.m(-2).d(-1). The best phosphate removals (38-49%) were obtained in the reactors with PU, tezontle, ceramic sheres and SESSIL.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.