Multi-species monitoring of rare wetland fishes should account for imperfect detection of sampling devices

作者: Scotte D. Wedderburn

DOI: 10.1007/S11273-018-9634-7

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摘要: Accuracy in estimating occupancy of a threatened species is important for conservation but false absences bias many monitoring programs. Imperfect detection especially relevant to surveys rare wetland fishes which are often small-bodied and cryptic. Many factors influence probability detection, including fish size abundance, habitat characteristics sampling devices. can be addressed by accounting when modelling detection/non-detection data collected replicate surveys. Three ecological specialists were once common habitats associated with Lake Alexandrina at the terminus Murray–Darling Basin, Australia. The Murray Hardyhead (Craterocephalus fluviatilis), Southern Pygmy Perch (Nannoperca australis) Yarra (N. obscura) now region following population collapses during prolonged drought, ongoing aims assess their statuses management purposes. This study compares cohabiting 2 years multi-species using contrasting devices (fyke seine). findings suggest large variations estimated occur between Perch. was undetected study. Overall, show programs single device may wrongly estimate target fish. By imperfect will improve inferences regarding status, recovery quality more accurately inform management.

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