Superovulation of bongo antelope () and interspecies embryo transfer to African eland ()

Dresser, B. L.; Pope, C. E.; Kramer, Laura; Kuehn, Gary; Dahlhausen, R.D.; Thomas, Warren D.

doi:10.1016/0093-691x(84)90332-7

Cited by 16 publications

(4 citation statements)

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“…Interspecific and inter-subspecific embryo transfer may ultimately be a key technique for the rapid propagation of endangered deer populations, although rate of propagation will be limited by availability of suitable recipient animals which can successfully carry transferred embryos to term. Such techniques have been successful between species such as zebra (Equus burchellii) and horse (Equus caballus; Summers, 1986); mouflon (Ovis musimon) and sheep (Ovis aries; Bunch, Foote & Whitaker, 1977); gaur (Bos gaurus) and domestic cattle (Bos tuurus; Stover & Evans, 1984), and bongo (Tragelaphus euiyceros) and eland (Tragelaphus oryx ;Dresser et al, 1984). Inter-subspecific embryo transfer could be applied using safe subspecies as recipients for embryos collected from subspecies classified as critical or endangered.…”

Section: Interspecijic Embryo Transfer and Maternal Recognition Of Prmentioning

confidence: 99%

Conservation of deer: contributions from molecular biology, evolutionary ecology, and reproductive physiology

1997

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Molecular phylogenetics, interspecific comparisons, and assisted reproductive techniques are recent approaches to understanding and facilitating conservation of endangered species. This paper reviews the contribution of these approaches to a small but well-studied group of mammals, deer, many of which are endangered in the wild. Conservation efforts require a comprehensive understanding of the biology and history of these animals. The value of assisted reproductive technologies for conservation of deer has received increased awareness especially for captive populations. Such breeding programmes are designed to assist propagation of threatened species and to maximize genetic diversity within populations through the movement of genetic material across the globe, but will only be successful if we understand the genetic and reproductive potential of various lineages. Here we discuss the phylogenetic status of deer, the distinctiveness and evolution of their reproductive patterns, and current approaches for improving the success of controlled breeding programmes for the conservation of endangered lineages. Only by combining both theoretical and practical approaches to conservation efforts can we hope to salvage the remaining organismal diversity of our planet.

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Section: Interspecijic Embryo Transfer and Maternal Recognition Of Prmentioning

confidence: 99%

Conservation of deer: contributions from molecular biology, evolutionary ecology, and reproductive physiology

1997

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“…In bovids, the protocol used depends largely on the size of the animal (Loskutoff and others 1995). For larger bovids, transcervical embryo collection and/or transfer has proved possible in bongo antelope ( Tragelaphus euryceros ), guar ( Bos guarus ), eland ( Taurotragus oryx ), American bison ( Bison bison ), Asiatic buffalo ( Bubalus bubalis ), scimitar‐horned oryx ( Oryx dammah ) and greater kudu ( Tragelaphus imberbis ) (Drost and others 1983, Dresser and others 1984, Pope and others 1988, Loskutoff and others 1990, 1995; Schiewe and others 1991). As less invasive techniques are developed for ET in sheep, they are increasingly being adapted for use in small non‐domestic bovids such as the yellow‐backed duiker ( Caphalophus sylvicultor ) and suni ( Neotragus moschatus zulensis ) (Schiewe and others 1991).…”

Section: The Advantages and Limitations Of Assisted Breeding Techniqumentioning

confidence: 99%

“…One solution to this problem is inter‐species embryo transfer, in which females of a related abundant species are used as ‘incubators’ for embryos of the endangered species. Interspecies embryo transfer has been attempted successfully between mouflon ( Ovis musimon ) and sheep (Bunch and others 1977), Bos indicus and Bos taurus (Summers and others 1983), guar and domestic cattle (Stover and Evans 1984), bongo and eland (Dresser and others 1984) and between Przewalski's horse, horse and donkey (Summers and others 1987).…”

Section: The Advantages and Limitations Of Assisted Breeding Techniqumentioning

confidence: 99%

Potential of assisted breeding techniques for the conservation of endangered mammalian species in captivity: a review

Bainbridge

Jabbour

1998

Veterinary Record

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An alarming worldwide extinction of animal species is taking place as a result of the activities of the increasing global human population. The original ranges of many animal species are being reduced and fragmented and, in some cases, they have been reduced to perilously small relict populations. The adverse genetic consequences of these restrictions are becoming clear, as are possible methods for their alleviation. The concept of ex situ genetic management of small captive populations of endangered species with a view to re-introducing them into the wild is attracting increasing interest. Modern reproductive techniques will play an important role in such programmes, and it is likely that an increasing number of veterinarians will become involved. However, the literature describing the aims and methods of reproductive genetic management is scattered and often not readily available to interested veterinary surgeons. The aim of this review is to deal with this problem by describing some potential approaches to the captive breeding of endangered species.

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“…The common eland lends itself to this approach due to the large frame of the species and its relatively calm nature. The adaption of such assisted techniques as artificial insemination, embryo transfer and in vitro fertilization are all options to apply to nondomestic reproduction, some of which have been achieved, although with low efficiency (Dresser et al, 1984;Pope et al, 1991;Luskutoff et al, 1990;Schiewe et al, 1991a, b;Morrow et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

164 Characterization of the Common Eland (Taurotragus Oryx) Estrous Cycle

Pennington

Gentry

Pope

et al. 2009

Reprod. Fertil. Dev.

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Three species of Tragelaphine (spiral horned) antelopes are endangered including the Eastern Bongo. Though most antelope species are represented as captive herds, a detailed characterization of their estrous cycles has not been described. In a crossover experimental design utilizing two groups of four females (n = 8), two estrus synchronization treatments were applied to each female. The treatments were: 1) PGF2∝ (Lutalyse®, 25 mg IM) repeated 11 days later and 2) administration of a progestin (altrenogest, 5 mL, 2.2% p.o.) for 7 days followed by PGF2∝ (25 mg IM) on 7th day. Blood samples were collected three days (Monday, Wednesday and Friday) per week until 2 days before expected estrus when ovaries were examined via transrectal ultrasound once daily and blood samples were collected twice daily, until the dominant follicle was absent. Blood samples were then collected three days per week until two days before the predicted subsequent natural estrus, when intensive ultrasound and blood collection was resumed. Plasma progesterone levels were determined via competitive radioimmunoassay utilizing a double antibody system from a commercially available kit (Diagnostic Systems Laboratories, Webster, TX, USA). Progesterone levels declined in an equal number of females (n = 6 or 75%) following prostaglandin injection in treatments 1 and 2, suggesting both methods to synchronize the estrous cycle or induce estrus are equally effective. Five of the eight females ovulated at least once during the study. A total of eight (25%) of the 32 possible ovulations were detected by ultrasound observation and confirmed by progesterone levels. Basal progesterone levels for the ovulating females around the days of ovulation were approximately 0.5 ng mL–1 and peaked at approximately 2 ng mL–1 during the luteal phase. Ultrasound observed ovulations occurred as frequently on the right ovary as the left. Two animals from treatment 2 ovulated during both the induced and natural cycles on alternate ovaries. An interovulatory interval of 21 days was observed and agrees with data previously reported by Durrant (1983 Zoo Biol. 2, 191–197). The average time to ovulation after PGF2∝ injection was 69 h (range 58–82 h). The average follicular size 12 to 24 h prior to ovulation was 9 and 7 mm for the induced and natural ovulations, respectively, suggesting that eland follicles ovulate at 10 mm. The described technology allows hormonal and ultrasonographic characterization of the estrous cycle in the eland antelope.

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Superovulation of bongo antelope () and interspecies embryo transfer to African eland ()

Cited by 16 publications

References 0 publications

Conservation of deer: contributions from molecular biology, evolutionary ecology, and reproductive physiology

Conservation of deer: contributions from molecular biology, evolutionary ecology, and reproductive physiology

Potential of assisted breeding techniques for the conservation of endangered mammalian species in captivity: a review

164 Characterization of the Common Eland (Taurotragus Oryx) Estrous Cycle

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