Abstract
Abstract the goal of this study was to better understand population characteristics of Villosa iris (Lea) (Rainbow Shell) in the Spring River drainage in north-central Arkansas through documenting seasonal spatial patterns, movement behavior, population size, size-frequency distributions, sex ratios, and fecundity. We conducted monthly mark and recapture sampling between May and September 2007 (i.e., before, during, and after spawning) and documented the sex, size, fecundity, and spatial location of individual Rainbow Shell at 2 sites (SFSR1 and SR1). Population estimates were relatively high at both sites with 166 ± 32 (SE) and 381 ± 37 (SE) individuals at SFSR1 and SR1, respectively. Sex ratio was highly skewed toward males at SFSR1 with a ratio of 1.0:2.6, but only slightly skewed at SR1 with a ratio of 1.0:1.3. Mean fecundity was 27,849 ± 11,653 (SE) and 15,089 ± 11,710 (SE) glochidia at SFSR1 and SR1, respectively. Spatially, statistically more males were found upstream of non-gravid females during t...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.