Monitoring by telemetry reveals differences in movement and survival following hatchery or wild rearing of an endangered fish

摘要: Species reintroduction is a management strategy used to conserve endemic fish biodiversity. The present study investigated stocking on-grown endangered trout cod (Maccullochella macquariensis) in the Murrumbidgee River, Australia. hypothesis that post-juvenile dispersal underpins long-term scarcity of adults recorded at fingerling locations was also tested. Radio-tracking quantify stocked sub-adults (2-year old hatchery fish, n = 27) compared with originally as fingerlings (unknown-age wild 31), but we encountered poor survivorship former group (survivorship 9% and 95%, respectively, 13 months post release). exhibited both limited large-scale (up 55 km) downstream from release site. Wild net dispersal, occupying home-ranges within 13-km reach occasionally undertook excursions (10-70 km). It concluded (1) re-establishment populations based on not straightforward, (2) this species have an ability disperse away sites. demonstrates benefit using radio-tracking monitor movement threatened indicates need consider effects rearing when conducting reintroductions.