Sand fly (Diptera, Psychodidae, Phlebotominae) abundance and diversity in areas affected by the São Francisco River transposition project in Ceará State, Brazil

Table 3 Student’s t-test (t) with degrees of freedom (df) for the Shannon’s diversity index in the seven municipalities monitored in the period between May 2011 and December 2014

	Brejo Santo		Lavras de Mangabeira		Iguatu		Mauriti		Jaguaribe		Jaguaretama
	df	t	df	t	df	t	df	t	df	t	df	t
Missão Velha	12,080	48.145	25,577	88.831	19,655	109.66	19,411	48.015	18,978	130.333	21,673	125.974
Brejo Santo			7878	8.139	6872	18.05	13,915	4.118	6766	31.479	7294	31.523
Lavras de Mangabeira					78,103	24.136	12,403	15.085	67,332	58.949	51,413	54.037
Iguatu							10,406	26.829	107,940	47.171	33,228	40.512
Mauriti									10,194	42.318	11,214	41.995
Jaguaribe											27,997	1.979

ISSN: 1756-3305