Coexistence of two newt species in a transition zone of range overlap Author Arntzen, Jan W. text Contributions to Zoology 2022 2022-03-21 91 2 133 151 http://dx.doi.org/10.1163/18759866-bja10028 journal article 10.1163/18759866-BJA10028 1875-9866 8343359

TABLE 2 Numbers of adult newts observed in the focal pond near Ambleteuse, Pas de Calais, France

Year	Method	Ichthyosaura alpestris	Lissotriton helveticus	Lissotriton vulgaris
$ = for population size estimates see table 3; # = including animals found dead.
1975	Dipnet	3	31	10
1979	Dipnet	5	47	18
1980	Dipnet	4	68	38
1981	Dipnet	7	118	40
1982	Dipnet	2	15	13
1983 $	Dipnet	28	363	208
1984	Dipnet	13	172	82
1986 $	Dipnet	22	226	184
1986 #	Dipnet	23	731	192
1988 $	Dipnet	29	413	132
1989 $	Dipnet	100	396	228
1990 $	Dipnet	24	297	71
1991 $	Dipnet	71	251	115
1992 $	Dipnet	19	388	162
1993 $	Dipnet	44	193	111
1994 $	Dipnet	26	132	9
1995 $	Dipnet	91	570	52
2003 $	Dipnet	98	156	4
2012 $	Funnel trap	213	426	81
2021	Funnel trap	30	71	12