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“Fight, flight or freeze” Tonische immobiliteit bij haaien. (Dutch/Flemish)
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- Author(s): De Swaef, E.; Vercauteren, M.; Pieraets, L.; Declercq, A. M.
- Source:
Vlaams Diergeneeskundig Tijdschrift; 2020, Vol. 89 Issue 5, p243-251, 9p- Subject Terms:
- Source:
- Additional Information
- Alternate Title: Fight, flight or freeze Tonic immobility in sharks. (English)
- Abstract: Tonic immobility (TI) is an inherited and reversible status of motoric immobility that can be provoked in a variety of terrestrial and aquatic animal species, including sharks. In sharks, this behavior, which is originally natural behavior, can be induced by putting external pressure on the fins and turning the animal on its back, after which the sharks will display reduced muscle tone and will temporarily not respond to environmental stimulation. It can be expected that this state has an effect on the physiology of the animal. In sharks, it can induce lowered ventilation efficiency with impact on blood parameters, it can cause a stress response and disrupt the osmolarity of the blood. Nonetheless, this TI state in sharks has its applications in scientific and veterinary (clinical) research, blood sampling and wound treatment. However, tonic immobility in sharks remains an enigmatic phenomenon that should be studied in detail using an interdisciplinary approach. [ABSTRACT FROM AUTHOR]
- Abstract: Tonische immobiliteit (TI) is een niet-aangeleerde en omkeerbare toestand van motorische onbeweeglijkheid die bij verscheidene terrestrische en aquatische diersoorten, zoals haaien, kan worden uitgelokt. TI is van oorsprong een natuurlijk gedrag dat bij haaien kan worden uitgelokt door plaatselijke druk uit te oefenen ter hoogte van de vinnen en de dieren op de rug te draaien, waarna ze een verslapping van de spiertonus vertonen en tijdelijk niet meer reageren op omgevingsstimuli. Deze toestand kan mogelijk een effect hebben op de fysiologie van de dieren. TI zou bij haaien de ventilatie-efficiëntie verminderen en bijgevolg verscheidene bloedparameters beïnvloeden, stressrespons induceren en de osmolariteit van het bloed verstoren. Desalniettemin kent TI bij haaien wetenschappelijke en diergeneeskundige toepassingen bij (klinisch) onderzoek, bloedafname en wondbehandeling. Tonische immobiliteit bij haaien is echter een enigmatisch fenomeen en verdient verder interdisciplinair onderzoek. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Vlaams Diergeneeskundig Tijdschrift is the property of Ghent University, Faculty of Veterinary Medicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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