Gekkonid field studies are hampered by the difficulty to individually recognize individuals. In this study we assess the feasibility of using their variegated iris pattern to photo-identify Tarentola boettgeri bischoffi, a threatened Macaronesian endemic. Using a library of 924 photos taken over a 9-month period we also evaluate the use of the pattern matching software Interactive Individual Identification System (I3S) to match photos of known specimens. Individuals were clearly recognized by their iris pattern with no misidentifications, and using I3S lead to a correct identification of 95% of the recaptures in a shorter time than the same process when conducted visually by an observer. The method’s feasibility was improved by increasing the number of images of each animal in the library and hindered by photos that deviate from a horizontal angle.
Advances in methodologies of sexing and marking less dimorphic gekkonid lizards: the study case of the Moorish gecko, Tarentola mauritanica.
Can citizen science monitor whale-shark aggregations? Investigating bias in mark-recapture modelling using identification photographs sourced from the public.
Multi-scale features for identifying individuals in large biological databases: an application of pattern recognition technology to the marbled salamander Ambystoma opacum.
J. Applied Ecol.45:
Photo-identification, side fidelity, and movement of female gray seals (Halichoerus grypus) between haul-outs in the Baltic Sea.
Tarentola bischoffi. In:
Atlas dos Anfíbios e Répteis de Portugal p.
LoureiroA.Ferrand de AlmeidaN.CarreteroM.A.PauloO.S. Eds Instituto de Conservação da Natureza e da BiodiversidadeLisboa.
Photographic identification in reptiles: a matter of scales.
Investigating the viability of photo-identification as an objective tool to study endangered sea turtle populations.
J. Exp. Mar. Biol. Ecol.360:
Van TienhovenA.M.Den HartogJ.E.ReijnsR.A.PeddemorsV.M. (2007):
A computer-aided program for pattern-matching of natural marks on the spotted raggedtooth shark Carcharias taurus.
J. Applied Ecol.44:
An integrative taxonomic revision of the Tarentola geckos (Squamata, Phyllodactylidae) of the Cape Verde Islands.
Zool. J. Linnean Soc.164:
How to monitor elusive lizards: comparison of capture-recapture methods on giant day geckos (Gekkonidae, Phelsuma madagascariensis grandis) in the Masoala rainforest exhibit, Zurich Zoo.