Abstract
Abstract Hobbseus yalobushensis, the Yalobusha rivulet crayfish, is a species of conservation concern because it is known from only six localities in parts of three central Mississippi counties. No studies have focused on the species since its description in 1989. Our objectives were to: (1) identify additional H. yalobushensis localities within a landscape managed intensively for loblolly pine (Pinus taeda) production, (2) relate stream size, water quality variables, and flow permanence to species presence or density, (3) characterize the aquatic community in relation to H. yalobushensis, (4) better define elements of the species' life history, and (5) compile unpublished H. yalobushensis localities from post-1989 collection records. During February and March 2011–2013, we made 56 samples in 24 reaches of 16 streams in Calhoun County, Mississippi. We documented captured crayfishes, fishes, and amphibians and measured habitat and water quality variables. Catch-per-unit-effort (CPUE, number per 100 s elect...
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