English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Present address for contact author: School of Marine and Atmospheric Sciences Stony Brook University Stony Brook, New York 11790 Abstract—Anthropogenic perturbations during the 19th and 20th centuries resulted in major declines in abundance of populations of shortnose sturgeon (Acipenser brevirostrum). Despite the designation of this species as endangered, most populations are still not recovering. Abundance monitoring is needed to identify fluctuations in recruitment and survival; however, riverspecific assessments are deficient throughout the range of this species. During the summer of 2011, we used anchored nets to fish a closed population of shortnose sturgeon in the Altamaha River in Georgia. Markrecapture tagging resulted in the capture of 288 shortnose sturgeon (272 fish with unique marks and 16 fish recaptured) over 11 weekly sampling occasions. Estimates of the abundance of shortnose sturgeon were derived by using Huggins closedcapture models. The preferred model incorporated effects of temporal variation on weekly capture probability and estimated an abundance of 2218 individuals (95% confidence interval [CI]: 1424–3350), including 725 (95% CI: 455–1192) juveniles and 1493 (95% CI: 954–2409) adults. Point estimates of group abundance indicate that the population is dominated by adults, although dynamic shifts in size structure following periods of high recruitment have been reported to occur. This study continued previous markrecapture efforts in this river system, and its results offer further evidence that the Altamaha River supports the largest population of shortnose sturgeon south of Chesapeake Bay.

Abundance of endangered shortnose sturgeon (Acipenser brevirostrum) in the Altamaha River in Georgia