Letter | Published:

An Attempt to cross the Domestic Rabbit (Oryctolagus cuniculus) and Hare (Lepus europæus)

Nature volume 180, page 853 (26 October 1957) | Download Citation



PREVIOUS attempts1 to obtain young from domestic rabbits by insemination with epididymal spermatozoa from hares (Lepus timidus ainu or Lepus europœus) have proved unsuccessful. The possibility, however, that fertilization and a limited amount of embryonic development may have occurred has not so far been investigated. Recently2, it was found that in rabbits inseminated with epididymal spermatozoa from the eastern cottontail rabbit (Sylvilagus floridanus), 37 per cent of the eggs were fertilized but degeneration occurred at all stages before or at biastulation. The experiment described here was undertaken to determine whether fertilization occurred in rabbits inseminated with hare spermatozoa and, if so, at what stage development ceased.

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    , and , Zool. Mag., Tokyo, 36, No. 340 (1924). , and , J. Genet., 20, 401 (1929).

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    , and , J. Hered., 46, 41 (1955).

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    , paper submitted to J. Endocrin. (in the press).

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    , J. Endocrin., 13, 296 (1956).

  5. 5.

    , Ann. Roy. Agric. Coll., Sweden, 21, 417 (1954).

  6. 6.

    , , “Fertilisation” (Methuen, London, 1956).

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  1. Agricultural Research Council Unit of Reproductive Physiology and Biochemistry, Animal Research Station, Huntingdon Road, Cambridge. July 30.

    • C. E. ADAMS


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