Diadromous fish species dominate the New Zealand freshwater fish fauna and make up 15 of the 17 native fish species found on the Taranaki Ring Plain. Trajectories of occurrence in relation to elevation and distance from the sea are described for 11 diadromous and 2 non‐diadromous species using data from the New Zealand Freshwater Fish Database and data collected over the summer of 1997/ 98. Distinctive distributions were found...

To explore whether biotic interactions may be more common in benthic invertebrate communities in stable compared with unstable New Zealand streams, interspecific associations of invertebrate stone assemblages were examined in 10 streams of similar geomorphological character but differing stability. More significant correlations were found than expected by chance at most sites. Stable sites had more negative and positive associ...

A predictive model of fish community composition using a reference condition approach is proposed for the Taranaki region of New Zealand. The model is used to quantify the effects of barriers on the migration of native fish in the region. Occurrence records of fish in streams without migratory barriers (reference sites) obtained from the New Zealand freshwater fish database were used to establish trajectories of occurrence for...