This study assessed zooplankton density and Chl-a amount to understand their spatial seasonal variation in Lake Malombe. Samples were collected for analysis during the hot, dry season (HDS) cool, dry, windy (CDWS). The identified Tropodiaptomus cunningtoni (TC), Mesocyclops aequatorialis (MAA), Thermocyclops neglectus (TN), Bosmina longirostris (BL), Diaphanosoma spp. (DS), Nauplii. These group...

Colony formation in marine phytoplankton can be modified by the presence of grazers, but effect colony size and shape on feeding behavior grazers is still relatively unknown. To explore defensive role formation, we examined response three differently sized (copepodites, copepod nauplii, two heterotrophic dinoflagellates) colony-forming phytoplankton, using both direct video observations bottle ...

In this study, an individual-based model (IBM) was established and applied to simulate the effects of salinity variations on productivity a promising live feed cyclopoid copepod Apocyclops royi for aquaculture applications. The integrates effect different reproductive traits temperature female longevity. To calibrate developed Mobidyc platform, we collected data from previous literature conduct...

Impacts of alien species may change with time but there are few long-term studies of invasions. Here, we present an example of a substantial change in the impact of an alien species that appeared more than a decade after initial invasion. We studied an invasion of zebra mussels (Dreissena polymorpha) into the Hudson River (New York, USA) over a 22 year period (1987–2008) including five years of...

A continuous microwave system to treat ballast water inoculated with different invasive species was designed and installed atthe Louisiana State University Agricultural Center. The effectiveness of the system to deliver the required heating loads to inactivate the organisms present was studied. The targeted organisms were microalgae (Nannochloropsis oculata), zooplankton at two different growth...

The ever-increasing threat from infectious diseases and the development of insecticide resistance in mosquito populations drive the global search for new natural insecticides. The aims of this study were to evaluate the mosquitocidal activity of the extracts of seaweed Bryopsis pennata against dengue vectors Aedes aegypti and Aedes albopictus, and determine the seaweed's toxic effect on brine s...

The stage-specific spatial distribution and mortality of Balanus glandula and Chthamalus spp. larvae were assessed with a series of daily vertical plankton tows collected from innershelf waters in La Jolla, Southern California, in March 2003. Sampling stations were located within 1.1 km of the shoreline, at depths of 10 to 45 m. For both groups, we observed a spatial segregation of naupliar sta...