Comparison of body temperature and heart rate in sea turtles from Baja California Sur, Mexico

Main Article Content

Helena Fernández-Sanz
https://orcid.org/0000-0001-7902-6892
Eduardo Reséndiz
https://orcid.org/0000-0002-5219-5511

Abstract

Sea turtles depend on ambient temperature to carry out their main activities, so changes in water temperature can affect the function of their immune system and represent different threats. To assess vital signs in black sea turtles (Chelonia mydas) in the Ojo de Liebre lagoon complex, Mexico, 600 turtles were examined. Carapace, plastron, and left inguinal area temperatures were measured with a digital infrared thermometer gun. Cloacal temperature was measured with an electronic thermometer. Heart rate was recorded using a stethoscope. Statistical analyses found no significant variation between inguinal area and cloacal temperatures. Vital sign measurements were compared with previous reports in the region, and there were differences in body temperatures, which were attributed to the characteristics of the water masses inhabited by the turtles. There was no significant difference between heart rate data for black sea turtles in this study and previously reported data for healthy sea turtles in the region, indicating that these data are likely an accurate representation for the species. All values fell within the reference intervals for healthy sea turtles. This minimally invasive diagnostic approach using vital signs allowed us to evaluate and infer core organ functions and to rule out health threats such as cold-stunning, resulting in a useful preliminary systemic assessment of free-ranging sea turtles.

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How to Cite
Fernández-Sanz, H., & Reséndiz, E. (2021). Comparison of body temperature and heart rate in sea turtles from Baja California Sur, Mexico. Ciencias Marinas, 47(2), 139–146. https://doi.org/10.7773/cm.v47i2.3187
Section
Research note

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References

Aguirre AA, Lutz PL. 2004. Marine turtles as sentinels of ecosystem health: is fibropapillomatosis an indicator? EcoHealth. 1:275–283.

https://doi.org/10.1007/s10393-004-0097-3

Arthur K, Limpus C, Balazs G, Capper A, Udy J, Shaw G, Keuper- Bennett U, Bennett P. 2008. The exposure of green turtles (Chelonia mydas) to tumour promoting compounds produced by the cyanobacterium Lyngbya majuscula and their potential role in the aetiology of fibropapillomatosis. Harmful Algae. 7(1):114–125.

https://doi.org/10.1016/j.hal.2007.06.001

Balazs GH. 1999. Factors to consider in the tagging of sea turtles. In: Eckert K, Bjorndal K, Abreu-Grobois A, Donnelly M (eds.), Research and Management Techniques for the Conservation of Sea Turtles. IUCN/SSC Marine Turtle Specialist Group, Publication No. 4. Washington DC: International Union for Conservation of Nature.

Bolten AB. 1999. Techniques for measuring sea turtles. In: Eckert K, Bjorndal K, Abreu-Grobois A, Donnelly M (eds.), Research and Management Techniques for the Conservation of Sea Turtles. IUCN/SSC Marine Turtle Specialist Group, Publication No. 4. Washington DC: International Union for Conservation of Nature.

Butler PJ, Milsom WK, Woakes AJ. 1984. Respiratory, cardiovascular and metabolic adjustments during steady state swimming in the green turtle, Chelonia mydas. J Comp Physiol. 154:167–174.

https://doi.org/10.1007/bf00684141

Contreras F. 1985. Lagunas costeras mexicanas, Centro de Ecodesarrollo. México: Secretaría de Pesca.

[ESSA] Empresa exportadora de sal. 2018. Informe anual de los monitoreos de tortugas marinas en el complejo lagunar Ojo de Liebre BCS, México. Guerrero Negro (Baja California Sur, Mexico): ESSA, Gerencia de Gestión Integral y Planeación. 145 p.

Foley AM, Singel KE, Dutton PH, Summers TM, Redlow AE, Lessman J. 2007. Characteristics of a green turtle (Chelonia mydas) assemblage in northwestern Florida determined during a hypothermic stunning event. Gulf Mex Sci. 25(2):131–143.

https://doi.org/10.18785/goms.2502.04

Hunt KE, Innis C, Merigo C, Burgess EA, Norton T, Davis D, Kennedy AE, Buck CL. 2019. Ameliorating transport-related stress in endangered Kemp’s ridley sea turtles (Lepidochelys kempii) with a recovery period in saltwater pools. Conserv Physiol. 7(1):coy065.

https://doi.org/10.1093/conphys/coy065

Innis CJ, Tlusty M, Merigo C, Weber ES. 2007. Metabolic and respiratory status of cold-stunned Kemp’s ridley sea turtles (Lepidochelys kempii). J Comp Physiol B. 177:623–630.

https://doi.org/10.1007/s00360-007-0160-9

Lluch-Belda D. 2000. Centros de Actividad Biológica en la costa de Baja California. In: Lluch-Belda D, Elorduy-Garay JF, Lluch- Cota SE, Ponce-Díaz G (eds.), BAC: Centros de Actividad Biológica del Pacífico Mexicano. Mexico: Centro de Investigaciones Biológicas del Noroeste. p. 49–64.

Manire CA, Norton TM, Stacy BA, Innis CJ, Harms CA. 2017. Sea Turtle Health & Rehabilitation. Plantation (FL): J Ross Publishing. 1045 p.

Márquez R. 1990. FAO Species Catalogue. Vol. 11: Sea turtles of the world. An annotated and illustrated catalog of sea turtle species known to date. Rome (Italy): Food and Agriculture Organization of the United Nations (FAO). 81 p.

Norton TM. 2005. Chelonian emergency and critical care. Topics in medicine and surgery. Semin Avian Exot Pet Med. 14(2):106–130.

https://doi.org/10.1053/j.saep.2005.04.005

Reséndiz E, Fernández-Sanz H, Barrientos-Torres DS, Lara-Uc MM. 2019. Clinical pathology and health reference values for loggerhead sea turtles (Caretta caretta) and olive ridley turtles (Lepidochelys olivacea) in the Gulf of Ulloa, Baja California Sur, Mexico. Comp Clin Path. 28(6):1637–1650.

https://doi.org/10.1007/s00580-019-02985-0

Reséndiz E, Fernández-Sanz H, Lara-Uc MM. 2018. Baseline health indicators of Eastern Pacific green turtles (Chelonia mydas) from Baja California Sur, Mexico. Comp Clin Path. 27(5):1309–1320.

https://doi.org/10.1007/s00580-018-2740-3

Schwartz FJ. 1978. Behavioral and tolerance responses to cold water temperatures by three species of sea turtles (Reptilia, Cheloniidae) in North Carolina. Fla Mar Res Publ. 33:16–18.

Southwood AL, Andrews RD, Lutcavage ME, Paladino FV, West NH, George RH, Jones DR. 1999. Heart rates and diving behavior of leatherback sea turtles in the eastern Pacific Ocean. J Exp Biol. 202(Pt9)(9):1115–1125.

Southwood AL, Darveau CA, Jones DR. 2003. Metabolic and cardiovascular adjustments of juvenile green turtles to seasonal changes in temperature and photoperiod. J Exp Biol. 206(24):4521–4531.

https://doi.org/10.1242/jeb.00689

Van Houtan KS, Smith CM, Dailer ML, Kawachi M. 2014. Eutrophication and the dietary promotion of sea turtle tumors. PeerJ. 2:e602.

https://doi.org/10.7717/peerj.602

Wyneken J, Mader DR, Weber III ES, Merigo C. 2006. Medical care of seaturtles. In: Mader DM (ed.), Reptile Medicine and Surgery. 2nd ed. St. Louis (MO): Saunders Elsevier. p. 972–1007.

https://doi.org/10.1016/B0-72-169327-X/50080-8