Reintroduction is more likely to be successful when the subject is a trophically intermediate species. Figure shows the proportion of successful reintroductions for each subject trophic group and connectance combination. Grey bars measure success in terms of secondary extinctions, white bars in terms of change to equilibrium biomasses. Error bars are ± 1 standard error of the mean.

Reintroduction is more likely to be successful when the subject is a trophically intermediate species. Figure shows the proportion of successful reintroductions for each subject trophic group and connectance combination. Grey bars measure success in terms of secondary extinctions, white bars in terms of change to equilibrium biomasses. Error bars are ± 1 standard error of the mean.

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Global biodiversity, and its associated ecosystem services, are threatened due to species extinctions. Reintroducing locally extinct species may be a partial solution to this problem. However, the success and possible consequences of any artificial reintroduction will depend on its ecological community, and the reaction of that community to the spe...

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... We selected 17 reintroduction sites in Nebraska, each occurring within the known historic range of plains topminnow, and where the species has been historically captured but was missing in recent surveys (see Fig. 1). We restricted reintroduction efforts to sites within the Loup, Elkhorn, and Platte River drainages to avoid potential population consequences of introducing genetically dissimilar individuals (Li et al. 2009, Byrne & Pitchford 2016. These 3 drainages are known to contain a genetically indistinguishable plains topminnow clade (Bessert 2011). ...
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Plains topminnow Fundulus sciadicus are endemic to the Great Plains (USA), and because of declines in their geographic range and local abundance, are granted protection throughout their native range. Experimental reintroductions were conducted to improve conservation techniques and enhance the long-term outlook for plains topminnow persistence in Nebraska. Reintroductions were attempted at 17 extirpated stream reaches using low and high founder densities (no. of fish per suitable area) and during 2 seasons (spring and fall) to identify successful techniques for future conservation efforts. Reintroduced populations were sampled monthly (excluding winter) for 2 yr to monitor population persistence. Repeated presence− absence data was used to estimate persistence probabilities (1 − extinction probability), which we used to compare reintroduction strategy treatments. Plains topminnow were recaptured at 76% of reintroduction locations (1456 total individuals) and reproduction was observed at 35% of those sites. Catch rates at reintroduction sites varied substantially (range: 0 to 30.78 ind. per 100 m). The influence of season and founder density were minimal. Population persistence was more likely at sites stocked in fall at higher densities; however, wide confidence intervals suggest that individual site characteristics may more strongly influence population persistence. Similar population outcomes regardless of reintroduction strategy provide managers flexibility when making conservation decisions.