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Evolutionary, molecular and comparative zoology
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RESEARCH ARTICLE
Contents Vol 58(4)

Seasonal variation in plasma corticosterone concentrations in wild and captive adult Duvaucel’s geckos (Hoplodactylus duvaucelii) in New Zealand

Manuela Barry A C , John F. Cockrem B and Dianne H. Brunton A
+ Author Affiliations
- Author Affiliations

A Ecology & Conservation Group, Institute for Natural Sciences, Massey University Albany, Private Bag 102 904, Auckland, New Zealand.

B Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11 222, Palmerston North, New Zealand.

C Corresponding author. Email: m.barry@massey.ac.nz

Australian Journal of Zoology 58(4) 234-242 https://doi.org/10.1071/ZO10023
Submitted: 19 March 2010  Accepted: 13 September 2010   Published: 13 October 2010

Abstract

Most of New Zealand’s herpetofauna species are threatened and in decline. Yet, little is known about their basic physiology and endocrinology. This study examined plasma corticosterone (CORT) concentrations in a threatened endemic New Zealand reptile, the Duvaucel’s gecko, in relation to season, sex, body temperature, body condition and female reproductive condition (pregnant versus non-pregnant). In addition, seasonal plasma CORT concentrations were compared between captive geckos from a breeding facility and a wild population to determine whether concentrations of CORT were chronically elevated in captive lizards. Plasma CORT concentrations showed significant seasonal variation, but were not related to sex, body temperature, body condition or female reproductive condition. Geckos, which successfully bred in captivity each year, did not exhibit chronically elevated plasma CORT levels but showed an elevation of plasma CORT concentrations in summer compared with wild geckos. Information on basal CORT concentrations in species of conservation concern can be beneficial for improving their management and can aid in identifying and evaluating stress-related changes in hormone patterns of individuals and chronic stress, which is particularly relevant for threatened species breeding programs.

Additional keywords: captive breeding, reptiles.


Acknowledgements

Financial support was provided by Massey University and Landcare Research (Manaaki Whenua, FRST contract No CO9X0503). We thank the staff of the NZ Department of Conservation, especially Rob Chappell and Dr David Towns for their time and logistic support and all volunteers for assistance in the field. We thank the representatives of the Ngati Paoa, Ngati Whanaunga and Ngati Hako and Ngati Wei (indigenous Maori people) for giving their consent to carry out this research on Maori land. Many thanks to Dr John Potter for providing veterinary support. Thanks to Dr Alison Cree for providing useful information and suggestions for this study, to Chris Wedding and three anonymous reviewers for helpful comments on the manuscript as well as to Jane Candy for technical support with hormone assays and assay development. This research was approved by the NZ Department of Conservation (permit number: WK-20506-RES) and the Massey University animal ethics committee (permit number: 07/16).


References

Amey, A. P. , and Whittier, J. M. (2000). Seasonal patterns of plasma steroid hormones in males and females of the bearded dragon lizard, Pogona barbata. General and Comparative Endocrinology 117, 335–342.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | Barwick R. E. (1982). The growth and ecology of the gecko Hoplodactylus duvaucelii at The Brothers islands. In ‘New Zealand Herpetology’. New Zealand Wildlife Service Occasional Publication No. 2. (Ed. D. G. Newman.) pp. 377–390. (New Zealand Wildlife Service Occasional Publication, Wellington.)

Belliure, J. , Meylan, S. , and Clobert, J. (2004). Prenatal and postnatal effects of corticosterone on behavior in juveniles of the common lizard, Lacerta vivipara. Journal of Experimental Zoology. Part A – Comparative Experimental Biology 301A, 401–410.
| Crossref | GoogleScholarGoogle Scholar | CAS | Bentley P. J. (1989). Steroid hormones. In ‘Comparative Vertebrate Endocrinology’. 3rd edn. (Ed. P. J. Bentley.) pp. 67–77. (Cambridge University Press, Cambridge.)

Blanchard B. (2002). Tuatara captive management plan and husbandry manual. New Zealand Department of Conservation Threatened Species Occasional Publication No. 21.

Cartland, L. K. , Cree, A. , Sutherland, W. H. F. , Grimmond, N. M. , and Skeaff, C. M. (1994). Plasma concentrations of total cholesterol and triacylglycerol in wild and captive juvenile tuatara (Sphenodon punctatus). New Zealand Journal of Zoology 21, 399–406.
| Crossref | GoogleScholarGoogle Scholar | Christmas E. (1995). Interactions between Duvaucel’s gecko (Hoplodactylus duvaucelii) and kiore (Rattus exulans). M.Sc. Thesis, University of Otago, Dunedin.

Cockrem, J. F. (2005). Conservation and behavioural neuroendocrinology. Hormones and Behavior 48, 492–501.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | Collen R. , Reardon J. , and Tocher M. (2009). Grand skink (Oligosoma grande) and Otago skink (Oligosoma otagense) captive management plan 2007–2014. New Zealand Department of Conservation.

Cree, A. (1994). Low annual reproductive output in female reptiles from New Zealand. New Zealand Journal of Zoology 21, 351–372.
| Crossref | GoogleScholarGoogle Scholar | Guillette L. J. , Cree A. , and Rooney A. A. (1995). Biology of stress: interactions with reproduction, immunology and intermediary metabolism. In ‘Health and Welfare of Captive Reptiles’. (Eds F. L. F. C. Warwick and J. B. Murphy.) pp. 32–81. (Chapman and Hall: London.)

Hanley, K. A. , Petren, K. , and Case, T. J. (1998). An experimental investigation of the competitive displacement of a native gecko by an invading gecko: no role for parasites. Oecologia 115, 196–205.
| Crossref | GoogleScholarGoogle Scholar | Hitchmough R. , Bull L. , and Cromarty P. (2007). New Zealand Threat Classification System Lists – 2005. New Zealand Department of Conservation, Wellington.

Homan, R. N. , Reed, J. M. , and Romero, L. M. (2003). Corticosterone concentrations in free-living spotted salamanders (Ambystoma maculatum). General and Comparative Endocrinology 130, 165–171.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | Newman D. G. (1996). Native frog (Leiopelma spp.) recovery plan. New Zealand Department of Conservation, Wellington.

Oppliger, A. , Clobert, J. , Lecomte, J. , Lorenzon, P. , Boudjemadi, K. , and John-Alder, H. B. (1998). Environmental stress increases the prevalence and intensity of blood parasite infection in the common lizard Lacerta vivipara. Ecology Letters 1, 129–138.
| Crossref | GoogleScholarGoogle Scholar | SPSS Inc. (2009). ‘PASW Statistics 18 Core System User’s Guide.’ (Chicago, IL.)

Thompson, M. B. , Daugherty, C. H. , Cree, A. , French, D. C. , Gillingham, J. C. , and Barwick, R. E. (1992). Status and longevity of the tuatara, Sphenodon guntheri, and Duvaucel gecko, Hoplodactylus duvaucelii, on North Brother Island, New Zealand. Journal of the Royal Society of New Zealand 22, 123–130.
Towns D. R. , and Atkinson I. A. E. (2004). Restoration plan for Korapuki Island (Mercury Islands), New Zealand: 2004–2024. Wellington.

Towns, D. R. , and Daugherty, C. H. (1994). Patterns of range contractions and extinctions in the New Zealand herpetofauna following human colonisation. New Zealand Journal of Zoology 21, 325–339.
| Crossref | GoogleScholarGoogle Scholar | van Winkel D. (2008). Efficiency of techniques for post-translocation monitoring of the Duvaucel’s gecko (Hoplodactylus duvaucelii) and evidence of native avian predation on lizards. M.Sc. Thesis, Massey University Albany, Auckland.

Vercken, E. , de Fraipont, M. , Dufty, A. M. , and Clobert, J. (2007). Mother’s timing and duration of corticosterone exposure modulate offspring size and natal dispersal in the common lizard (Lacerta vivipara). Hormones and Behavior 51, 379–386.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed |

Wack, C. L. , Fox, S. F. , Hellgren, E. C. , and Lovern, M. B. (2008). Effects of sex, age, and season on plasma steroids in free-ranging Texas horned lizards (Phrynosoma cornutum). General and Comparative Endocrinology 155, 589–596.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed |

Waye, H. L. , and Mason, R. T. (2008). A combination of body condition measurements is more informative than conventional condition indices: temporal variation in body condition and corticosterone in brown tree snakes (Boiga irregularis). General and Comparative Endocrinology 155, 607–612.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed |

Whitaker, A. H. (1968). The lizards of the Poor Knights Island, New Zealand. New Zealand Journal of Science 11, 623–651.


Wikelski, M. , and Cooke, S. J. (2006). Conservation physiology. Trends in Ecology & Evolution 21, 38–46.
| Crossref | GoogleScholarGoogle Scholar |

Wilson, B. S. , and Wingfield, J. C. (1994). Seasonal and interpopulational variation in plasma-levels of corticosterone in the side-blotched lizard (Uta stansburiana). Physiological Zoology 67, 1025–1049.
|  CAS |

Wingfield, J. C. , and Sapolsky, R. M. (2003). Reproduction and resistance to stress: when and how. Journal of Neuroendocrinology 15, 711–724.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed |