different ways. In the natural environment, if there is little human intervention, the aquatic ecosystem will... ... middle of paper ... ...on, requirements, adaptations, and why you chose it. The black molly is a variation of the sailfin molly, or Poecilia latipinna. This fish is small and mostly black with short fins. It also has adapted the ability to live in different salt levels if exposed over time and therefore, can eventually be part of a salt-water or fresh-water tank. This fish displays dimorphism
Eco-Columns provide a first-hand glimpse of how an ecosystem works through each level. While also allowing an impression into how each organism contributes to the overall health of the ecosystem being simulated in an eco-column. In the eco-column both a closed system and an open system were represented by, the terrestrial column being an open system and the filter chamber being a closed system. Closing off potential contamination of nutrients getting past and biogeochemical cycles being affected
sex steroids hormones, vitellogenin and induction of aromatase, gonadosomatic index and hepatosomatic index. In this study, juveniles Poecilia sphenops fish was exposed to three different (0.83ppm, 1.25ppm and 2.5ppm) concentration of atrazine for 100 days. Changes in plasma and gonadal content and concentrations of sex steroids and vitellogenin protein in poecilia sphenops under laboratory conditions were assessed. The low level of the Atrazine show estrogenic effect in males, as determined by a