New records on intestinal eversion in a free-ranging nurse shark (Ginglymostoma cirratum) and a free-ranging, breaching-spotted eagle ray (Aetobatus narinari)
Tóm tắt
Although intestinal eversion has been documented as an important behavior in elasmobranchs, it is rarely observed in wild animals. Here we describe the first published record of an intestinal eversion in a shark with a ring type of valvular intestine, the nurse shark (Ginglymostoma cirratum), and the first record of an intestinal eversion during breaching events in the spotted eagle ray (Aetobatus narinari), a ray with a conicospiral type of valvular intestine. These observations contribute to the scientific knowledge on this interesting and important behavior in elasmobranchs and also expand the proposed hypotheses for breaching behavior in rays.
Tài liệu tham khảo
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