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Effects of vegetation differences in relocated Utah prairie dog release sites

Natural Science 2013年第5期5卷 44-49页

作者： Rachel Curtis shandra nicole frey Department of Wildland Resources Utah State University Logan USA

Utah prairie dogs have been extirpated in 90% of their historical range. Because most of the population occurs on private land, this threatened species is continually in conflict with land-owners due to burrowing. The Utah Division of Wildlife Resources has been relocating Utah prairie dogs from private to public land since the 1970s, but relocations have been largely unsuccessful due to high mortality. Utah prairie dogs were relocated in 2010 and 2011 from the golf course in Cedar City, Utah to two prepared sites near Bryce Canyon National Park, Utah. Vegetation transects were established at each site to determine if there was a correlation between site vegetation composition and structure, and Utah prairie dog survival at relocation sites. The vegetation at the two sites was significantly different. One site had significantly less grass cover, more invasive plant cover, and rockier soils. The sites also had different soil structures and long-term Utah prairie dog retention rates. Newly established burrows were clustered rather than randomly distributed. Utah prairie dogs appeared to avoid placing burrows in areas with tall vegetation and rocky soils. More research is needed to determine how site selection determines longterm retention and colonization of a relocation site.

关键词： Burrows Cynomys Parvidens Relocation Reseeding Utah Prairie Dog Vegetation Composition Vegetation Structure

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Anatomic relationship of extensor indicis propius and extensor digitorum communis: Implications for tendon transfer

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World Journal of Orthopedics 2022年第11期13卷 978-985页

作者： Joanne Zhou Christopher frey nicole Segovia Jeffrey Yao Department of Orthopaedic Surgery Stanford University Medical CenterStanford UniversityRedwood cityCA 94063United States

BACKGROUND The extensor indicis proprius(EIP)tendon is a frequently used donor for a variety of tendon transfers,most commonly for reconstruction of the extensor pollicis longus(EPL).EIP is known to have frequent anatomic variants including split tendons and variations in tendon *** To characterize the anatomy of the EIP at the level of the extensor retinaculum,where tendon harvest is often performed,and share our preferred technique for EIP to EPL *** Twenty-nine fresh-frozen cadaveric forearms without history of forearm or hand injury or surgery were *** circumference and relationship of the EIP and extensor digitorum communis to the index(EDCI)at the metacarpophalangeal(MCP)joint and the distal extensor retinaculum were *** from the distal extensor retinaculum to the EIP myotendinous junction was *** EIP was ulnar to the EDCI in 96.5%of specimens(28/29)at the distal edge of the extensor *** the remaining specimen,EIP was volar to *** circumference at the distal extensor retinaculum averaged(9.3 mm±1.7 mm)for EDCI and 11.1 mm(±2.7 mm)for EIP(P=0.0010).The tendon circumference at the index MCP joint averaged 11.0 mm(±1.7 mm)for EDCI and 10.6 mm(±2.1 mm)for EIP(P=0.33).EIP had a greater circumference in 76%(22/29)of specimens at the distal extensor retinaculum whereas EIP had a greater circumference in only 31%(9/29)of specimens at the MCP *** The EIP tendon is frequently ulnar to and greater in circumference than the EDCI at the distal extensor retinaculum,which can be taken into consideration for tendon transfers involving EIP.

关键词： Surgical anatomy Tendon transfer Extensor digitorum communis Extensor indicis proprius Tendon harvest Cadaveric Dissection

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