Knowledge Resource Center for Ecological Environment in Arid Area
Variation in Annual Clutch Phenology of Sonoran Desert Tortoises (Gopherus morafkai) in Central Arizona | |
Lovich, Jeffrey E.1; Averill-Murray, Roy C.2,6; Agha, Mickey3; Ennen, Joshua R.4; Austin, Meaghan5 | |
通讯作者 | Lovich, Jeffrey E. |
来源期刊 | HERPETOLOGICA
![]() |
ISSN | 0018-0831 |
EISSN | 1938-5099 |
出版年 | 2017 |
卷号 | 73期号:4页码:313-322 |
英文摘要 | The phenology of egg production and oviposition in organisms affects survival and development of neonates and thus, both offspring and maternal fitness. In addition, in organisms with environmental sex determination, clutch phenology can affect hatchling sex ratios with attendant effects on population demography. The rapid rate of contemporary climate change might disrupt reproductive phenologies that evolved to match environmental conditions. To better understand the response of clutch phenology to annual and long-term changes in climate, we studied a population of Sonoran Desert Tortoises (Gopherus morafkai) in Arizona in 1993 and 1997-2005, specifically quantifying three phenophases, including (1) the estimated time of appearance of shelled eggs in females, (2) the estimated time that eggs were last visible in Xradiographs, and (3) the duration of the interval between the first two events. The mean date for appearance of shelled eggs was 6 June, and the mean date they were last visible was 26 June. After controlling for individual female effects, these dates were different among years. The total number of days that eggs were visible across all females within a year differed among years, but the mean duration of time that clutches were visible, after controlling for individual female effects, was similar among years. Three of 18 females exhibited interannual egg retention on 5 occasions from 52 clutches. Although G. morafkai ovulates only one clutch per year, they might oviposit up to two because of interannual egg retention. Most females produced shelled eggs through heat-unit accumulation achieving 8.3 degree days within a 14-d moving average. The ability to vary the timing of egg formation and oviposition might buffer G. morafkai from some of the effects of predicted increases in temperatures, but species-specific information on developmental temperatures and nesting behavior are needed to determine whether or not the species will be able to produce viable clutches of mixed sex ratios in a warmer climate. |
英文关键词 | Clutch appearance Clutch disappearance Clutch interval Egg retention Oviposition Phenophase Testudinidae |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000417257900007 |
WOS关键词 | DEPENDENT SEX DETERMINATION ; HATCHLING LIPID RESERVES ; WIND-ENERGY FACILITY ; CLIMATE-CHANGE ; PARENTAL INVESTMENT ; CHELYDRA-SERPENTINA ; SNAPPING TURTLE ; EGG RETENTION ; BODY-SIZE ; TEMPERATURE |
WOS类目 | Zoology |
WOS研究方向 | Zoology |
来源机构 | United States Geological Survey ; University of California, Davis |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/199410 |
作者单位 | 1.US Geol Survey, Southwest Biol Sci Ctr, 2255 North Gemini Dr,MS 9394, Flagstaff, AZ 86001 USA; 2.Arizona Game & Fish Dept, Nongame Branch, Phoenix, AZ 85086 USA; 3.Univ Calif Davis, Dept Wildlife Fish & Conservat Biol, One Shields Ave, Davis, CA 95616 USA; 4.Tennessee Aquarium Conservat Inst, 175 Baylor Sch Rd, Chattanooga, TN 37405 USA; 5.Trileaf Environm Corp, 2121 West Chandler Blvd,Suite 203, Chandler, AZ 85224 USA; 6.US Fish & Wildlife Serv, Desert Tortoise Recovery Off, Reno, NV 89502 USA |
推荐引用方式 GB/T 7714 | Lovich, Jeffrey E.,Averill-Murray, Roy C.,Agha, Mickey,et al. Variation in Annual Clutch Phenology of Sonoran Desert Tortoises (Gopherus morafkai) in Central Arizona[J]. United States Geological Survey, University of California, Davis,2017,73(4):313-322. |
APA | Lovich, Jeffrey E.,Averill-Murray, Roy C.,Agha, Mickey,Ennen, Joshua R.,&Austin, Meaghan.(2017).Variation in Annual Clutch Phenology of Sonoran Desert Tortoises (Gopherus morafkai) in Central Arizona.HERPETOLOGICA,73(4),313-322. |
MLA | Lovich, Jeffrey E.,et al."Variation in Annual Clutch Phenology of Sonoran Desert Tortoises (Gopherus morafkai) in Central Arizona".HERPETOLOGICA 73.4(2017):313-322. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。