Luna BA, Valdez PR, Romano PM, Galindo MF

Language: English/Spanish
References: 25
Page: 103-112
PDF size: 211.58 Kb.

ABSTRACT

Few studies have been published regarding the influence of the environment on the behaviour and welfare of captive dolphins and most of them have been in closed facilities. The aim of this study was to assess the time budget in fast and slow swimming, counter clockwise and clockwise swimming, as well as the state of rest in dolphins staying in closed and open facilities in daytime and evening hours. In addition, to give further information about the welfare state between dolphins in closed and open facilities, serum cortisol levels were compared. Six dolphins Tursiops truncatus in open facilities and four dolphins of the same species in closed facilities were used. There by, a focal sampling was used to obtain the data; 36 hours observing in open facilities and 48 in closed ones. Twenty blood samples were obtained from the ten dolphins in order to measure the serum cortisol, using radioimmunoassay. The locomotion bouts in swimming were higher in open facilities than in closed dolphinariums (P ‹ 0.05); additionally, the outcome showed higher time in fast clockwise swimming (P ‹ 0.05) with dolphins staying in open facilities, and more resting time (P ‹ 0.05) in closed dolphinariums. There were no differences in the average level of cortisol between both facilities (P › 0.05). The outcome obtained in this study helped to know how dolphins face up captivity in two kinds of facilities, and so to improve care and management.

REFERENCES

1. PEDERNERA-ROMANO C, VALDEZ RA, SINGH S, CHIAPPA X, ROMANO MC, GALINDO F. Salivary cortisol in captive dolphins (Tursiops truncatus): a non invasive technique. Anim Welfare 2006; 15: 359-362.

2. MIGUEL MC. Medición del comportamiento y cortisol salival de delfines de acuerdo a las actividades que realizan en cautiverio (tesis de maestría). México DF: Uni3.

3. UGAZ RC, SÁNCHEZ A, GALINDO MF. Comportamiento social e individual de un grupo de toninas (Tursiops truncatus) en instalaciones abiertas y cerradas. Vet Méx 2009; 40: 381-387.

4. BASSOS MK, WELLS RS. Effect of pool features on the behavior of two bottlenose dolphins. Mar Mammal Sci 1996; 12: 321-324.

5. SHYAN M, MERRIT D, KOHLMEIER NM, BARTON K, TENGE J. Effects of pool size on free-choice selections by Atlantic bottlenosed dolphins at one zoo facility. J Appl Anim Welfare 2002; 5: 215-225.

6. LUNA BA. Mediciones de comportamiento y cortisol en la tonina (Tursiops truncatus) en dos tipos de encierros: instalaciones cerradas y abiertas (tesis de maestría). México DF: Universidad Nacional Autónoma de México, 2008.

7. SOBEL N, SUPIN AY, MYSLOBODSKY MS. Rotational tendencies in the dolphin (Tursiops truncatus). Behav Brain Res 1994; 65: 41-45.

8. GYGAX L. Spatial movement patterns and behaviour of two captive bottlenose dolphins (Tursiops truncatus): abscence of stereotyped behaviour or lack of definition?. Appl Anim Behav Sci 1993; 38: 337-344.

9. MARINO L, STOWE J. Lateralized behavior in two captive bottlenose dolphins (Tursiops truncatus). Zoo Biol 1997; 16: 173-177.

10. RIDGWAY S, HOUSER D, FINNERAN J, CARDER D, KEOGH M, VAN BONN W et al. Functional imaging of dolphin brain metabolism and blood flow. J Exp Biol 2006; 209: 2902-2910.

11. SAAYMAN GS, TAYLER CK, BOWER D. Diurnal activity cycles in captive and free-ranging Indian Ocean bottlenose dolphins (Tursiops aduncus Ehrenburg). Behaviour 1973; 44: 212-233.

12. ROHR JJ, FISH FE, GILPATRICK JW. Maximum swim speeds of captive and free-ranging delphinids: critical analysis of extraordinary performance. Mar Mammal Sci 2002; 18: 1-19.

13. SEKIGUCHI Y, KOHSHIMA S. Resting behaviors of captive bottlenose dolphins (Tursiops truncatus). Physiol Behav 2003; 79: 643-653.

14. TOUMA C, PALME R. Measuring fecal glucocorticoid metabolites in mammals and birds: the importance of validation. Ann N Y Acad Sci 2005; 1046: 54-74.

15. ALTMANN J. Observational study of behavior: sampling methods. Behaviour 1974; 49: 227-267.

16. GALINDO F. Bases sobre la medición del comportamiento. En: GALINDO MF, ORIHUELA A, editores. Etología Aplicada. México: Universidad Nacional Autónoma de México, 2004: 357-358.

17. MARTIN P, BATESON P. Measuring Behaviour: an Introductory Guide. 2nd ed. Cambridge: Cambridge University Press, 1993.

18. SWEENEY JC. Blood sampling and other collection tecniques in marine mammals. In: FOWLER ME, editor. Zoo and wild animal medicine Current Therapy. 3rd ed. Philadelphia: WB Saunders, 1993: 425-428.

19. REIMERS TJ, MCCANN JP, COWAN RG. Effects of storage times and temperatures on T3, T4, LH, prolactin, insulin, cortisol and progesterone concentrations in blood samples from cows. J Anim Sci 1983; 57: 683-691.

20. ORTIZ RM, WORTHY GAJ. Effects of capture on adrenal steroid and vasopressin concentrations in free-ranging bottlenose dolphins (Tursiops truncatus). Comp Biochem Physiol 2000; 125: 317-324.

21. SINGH S. Estudio de bienestar del delfín nariz de botella (Tursiops truncatus) en cautiverio (tesis de maestría). México DF: Universidad Nacional Autónoma de México, 2005.

22. GOLEY PD. Behavioral aspects of sleep in Pacific White-sided Dolphin (Lagenorhynchus obliquedens, Gill 1865). Mar Mammal Sci 1999; 15: 1054-1064.

23. ST AUBIN DJ, RIDGWAY SH, WELLS RS. Dolphin thyroid and adrenal hormones: circulating levels in wild and semidomesticated Tursiops truncatus, and influence of sex, age and season. Mar Mammal Sci 1996; 12: 1-13.

24. SUZUKI M, TOBAYAMA T, KATSUMATA E, YASHIOKA M, AIDA K. Serum cortisol levels in captive killer whale and bottlenose dolphin. Fisheries Sci 1998; 64: 643-647.

25. ST AUBIN DJ. Endocrinology. In: DIERAUF LA, GULLARD FMD, editors. Handbook of Marine Mammals Medicine: Health, Disease and Rehabilitation. Vol. 2. Boca Raton: CRC Press, 2001: 165-192.