Status of Pseudorasbora parva in the Tiber River Basin (Umbria, central Italy) 20 years after its introduction | Knowledge and Management of Aquatic Ecosystems

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Table 6

U Mann-Whitney test analysis: comparison of the body condition values calculated for presence and absence of Pseudorasbora parva for the native species. P< 0.05 is in bold.

	Mean	Mean	U	Z	p	N values	N values	Sth. Dev.	Sth. Dev.
	syntopy	allotopy	U	Z	p	syntopy	allotopy	syntopy	allotopy
Wr Italian roach	98.68	102.41	1450291	−5.74	0.00	1738	1876	21.24	22.82
Wr Chub	94.40	100.20	1969384	−13.93	0.00	2646	1958	16.93	16.02
Wr Tiber barbel	90.29	93.03	209653.5	−6.51	0.00	902	581	13.94	13.91
Kn Arno goby	1.02	1.04	257754.00	−1.03	0.30	829	642	0.24	0.26

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