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- W2181106401 abstract "Abstract We describe the reproductive biology of northern populations of Crotalus willardi using data gathered from four long-term field studies, histological examination of museum specimens, and literature records. Spermiogenesis occurs summer to early autumn. All male C. willardi examined contained sperm in the vas deferens (June–September) and had enlarged kidney sexual segments (June–October). Parturition occurs from late July through August (n = 17). Postpartum females appear to remain reproductively inactive prior to hibernation. Secondary yolk deposition (vitellogenesis) commences in the late spring or early summer, one or more years after parturition. Ovulation and fertilization probably occur early in the spring, followed by 4–5 months gestation. Copulation occurs in midsummer to early fall (n = 10). Repeated observations of marked females over several years, proportion of adult gravid females (60% Crotalus willardi obscurus, 40% Crotalus willardi willardi, 51% pooled), observations on captive an..." @default.
- W2181106401 created "2016-06-24" @default.
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- W2181106401 date "2001-05-01" @default.
- W2181106401 modified "2023-09-27" @default.
- W2181106401 title "Reproduction in Northern Populations of the Ridgenose Rattlesnake,Crotalus willardi(Serpentes: Viperidae)" @default.
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- W2181106401 doi "https://doi.org/10.1643/0045-8511(2001)001[0473:rinpot]2.0.co;2" @default.
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