Cottus poecilopus Heckel, 1836, in the river Javorinka, the Tatra mountains, Slovakia
This study focuses on the Cottus poecilopus from the river Javorinka in the north-east High Tatra mountains, Slovakia. The movement and residence of 75 Alpine bullhead in the river were monitored and carefully recorded using GPS coordinates. A map representing their location in the river was generated. This data was collected in the spring and summer of 2016 and in the autumn of 2017. Body length and body weight of 67 Alpine bullheads were measured. The largest bullheads were collected between 860-880 m a.s.l.. Bulheads found at the 1 000-1 100 m a.s.l. were significantly smaller. In favourable microhabitats of 850-900 m, mainly large light shade bullheads were collected. Fish monitoring in Javorinka was conducted aproximatelly 55 years following previous monitoring of this river performed by Václav and Sylvia Dyk.
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