孵育条件对荒漠象龟性别决定、孵化成功率和生长的影响

IF 1.1 2区生物学 Q3 ZOOLOGY

Herpetological Monographs Pub Date : 1994-01-01 DOI:10.13016/M2GK2M

J. Spotila, L. C. Zimmerman, Christopher A. Binckley, J. S. Grumbles, D. Rostal, A. List, E. C. Beyer, Kelly M. Phillips, S. Kemp

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引用次数: 116

摘要

孵化温度对沙漠龟的性别决定有直接影响。低温(26.0-30.6℃)产生雄性，高温(32.8-35.3℃)产生雌性。关键温度约为31.8℃，性腺的宏观和微观解剖结构与其他海龟相似。在28.1 - 32.8℃的干沙(-5000 kPa)中，孵化成功率和存活率都很好。在35.3℃的温度下孵化对72%的卵来说是致命的，孵化出的幼雏在45天内就会死亡。湿沙(-5千帕)对沙漠龟蛋是致命的。孵化大小取决于卵的大小和孵化条件。在32.8℃和35.3℃孵育的幼崽显著小于28.1℃和30.6℃孵育的幼崽，孵育质量对幼崽的生长速率没有影响。因此，大卵产下的大雏鸟在120日龄时比它们的兄弟姐妹大。小海龟从

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EFFECTS OF INCUBATION CONDITIONS ON SEX DETERMINATION, HATCHING SUCCESS, AND GROWTH OF HATCHLING DESERT TORTOISES, GOPHERUS AGASSIZII

Incubation temperature has a direct effect on sex determination of the desert tortoise. Low temperatures (26.0-30.6 C) produce males and high temperatures (32.8-35.3 C) produce females. Pivotal temperature is approximately 31.8 C. Macroscopic and microscopic anatomy of the gonads is similar to that of other turtles. Hatching success and survival is very good between 28.1 and 32.8 C in dry sand (-5000 kPa). Incubation at 35.3 C is lethal for 72% of the eggs and produces weak hatchlings that die within 45 days. Wet sand (-5 kPa) is lethal for desert tortoise eggs. Hatchling size was dependent upon egg size and incubation condition. Hatchlings from eggs incubated at 32.8 and 35.3 C were significantly smaller than hatchlings from eggs incubated at 28.1 and 30.6 C. Hatching mass had no effect on growth rate of hatchlings. Thus, large eggs produced large hatchlings that were larger than their siblings at 120 days of age. Hatchlings from

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来源期刊

Herpetological Monographs 生物-动物学

CiteScore

5.40

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Since 1982, Herpetological Monographs has been dedicated to original research about the biology, diversity, systematics and evolution of amphibians and reptiles. Herpetological Monographs is published annually as a supplement to Herpetologica and contains long research papers, manuscripts and special symposia that synthesize the latest scientific discoveries.