List of the studied authors
Ganapati & Shanthakumari, 1962 (p.9, 16); Patel, 1975 (p.660); Madhupratap & Haridas, 1986 (p.105, tab.1); Othman & al., 1990 (p.561, 564, Table 1); Fernandes, 2008 (p.465, Tabl.2); Shanthi & Ramanibai, 2011 (p.132, Table 1); Jagadeesan & al., 2013 (p.27, Table 3, seasonal abundance)