Blooms of the harmful algal species Prymnesium parvum
are responsible for fish kills at various locations throughout
the world (Grane´li and Salomon, 2010). Since the
1980s fish kills associated with P. parvum blooms have
increased in the inland waters of Texas and other parts
of the USA (Southard et al., 2010; Roelke et al., 2011);
however, most previous studies have been conducted
under marine or estuarine conditions (Brooks et al.,
2010). This species releases toxins to the water column
that produce various toxicological responses (Brooks
et al., 2010).