Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/zoo.21281 |
Hormonal Profiles of Captive Galapagos Tortoises (Chelonoidis nigra) | |
Branson, Maile A.1; Atkinson, Shannon2; Ramos, Meg Ferrell3 | |
通讯作者 | Atkinson, Shannon |
来源期刊 | ZOO BIOLOGY |
ISSN | 0733-3188 |
EISSN | 1098-2361 |
出版年 | 2016 |
卷号 | 35期号:3页码:237-245 |
英文摘要 | Monthly blood samples, daily mating observations from Galapagos tortoises (Chelonoidis nigra), and local rainfall and temperature were collected at the Honolulu Zoo as part of a fertility evaluation. Testosterone concentrations were measured for males (n = 6), two of which were seen copulating and were considered sexually active. Estrone sulfate and progesterone concentrations were measured for female tortoises (n = 9), two of which nested and only one had laid eggs. Testosterone profiles were similar for both sexually active and sexually inactive males, both of which were positively correlated with temperature but not rainfall. Peak testosterone concentrations (12.0 = 1.4 ng/ml sexually active animals vs. 14.4 = 2.4 ng/ml sexually inactive animals) occurred at the end of the nesting season, from April to July. Estrone sulfate concentrations were similar for nesting (n = 2) and non-nesting (n = 7) female tortoises, rising from non-detectable concentrations (September), and increasing to peak concentrations during the nesting season. Progesterone concentrations remained low and spiked (9.44 ng/ml) only for the female that nested and laid eggs. Testosterone was negatively correlated with mating behavior, and the male tortoises were likely capable of spermatogenesis even though only two of them engaged in mating behavior. The female tortoises were not senescent, as the estrone sulfate concentrations likely reflected waves of ovarian follicular activity. Endocrine parameters were not in synchrony with rainfall, and a disconnect between the timing of reproductive events and the environmental milieu may help to explain the poor fertility of these tortoises. (C) 2016 Wiley Periodicals, Inc. |
英文关键词 | reproduction testosterone estrogen progesterone fertility rainfall temperature |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000385731400009 |
WOS关键词 | FEMALE DESERT TORTOISES ; REPRODUCTIVE-CYCLE ; ESTRONE SULFATE ; GEOCHELONE-ELEPHANTOPUS ; MONACHUS-SCHAUINSLANDI ; GOPHERUS-AGASSIZII ; DNA ANALYSIS ; PROGESTERONE ; ULTRASOUND ; PLASMA |
WOS类目 | Veterinary Sciences ; Zoology |
WOS研究方向 | Veterinary Sciences ; Zoology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/196884 |
作者单位 | 1.Univ Florida, Sch Forest Resources & Conservat, Dept Fisheries & Aquat Sci, Gainesville, FL 32611 USA; 2.Univ Alaska Fairbanks, Sch Fisheries & Ocean Sci, Juneau, AK USA; 3.Regeneron Pharmaceut Inc, Tarrytown, NY USA |
推荐引用方式 GB/T 7714 | Branson, Maile A.,Atkinson, Shannon,Ramos, Meg Ferrell. Hormonal Profiles of Captive Galapagos Tortoises (Chelonoidis nigra)[J],2016,35(3):237-245. |
APA | Branson, Maile A.,Atkinson, Shannon,&Ramos, Meg Ferrell.(2016).Hormonal Profiles of Captive Galapagos Tortoises (Chelonoidis nigra).ZOO BIOLOGY,35(3),237-245. |
MLA | Branson, Maile A.,et al."Hormonal Profiles of Captive Galapagos Tortoises (Chelonoidis nigra)".ZOO BIOLOGY 35.3(2016):237-245. |
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