Does experimental marking of wings influence resighting success in mesamphiagrion laterale and erythrodiplax umbrata? (Odonata: Coenagrionidae, Libellulidae)




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Odonatologica, 0375-0183, Vol. 43, Nro. 3. 2014, p. 237-246.

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Societas Internationalis Odonatologica

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To investigate if experimental marking affects the probability of resighting, 1,610 individuals of Mesamphiagrion laterale (Selys, 1876) and 630 individuals of Erythrodiplax umbrata (Linnaeus, 1758) were marked at two sites in Colombia and analysed with respect to marking variables as follows: marking colour used, which wing was marked, and a combination, i.e. the interaction, of these two. The colour and the marked wing were varied, using a different wing each time, and red, black, blue, or green colour. The information was analyzed using contingency tables (Chi-square test) to compare the probability of resighting for individuals within a population marked with a specific colour or on a specific wing to the probability of resighting for all other individuals in the population. In E. umbrata the resighting probability ranged as follows: 90.1 to 95.7% (marking colour type), 90.4 to 95.2% (wing used), and 87.5 to 97.8% (wing-colour combination). In the case of M. laterale, the resighting probability ranged as follows: 57.2 to 65.0% (marking colour type), 58.8 to 65.6% (wing used), and 51.0 to 82.0% (wing-colour combination). The colour, wing, or combination of wing-colour used for marking didn't have an effect on the resighting probability, suggesting that the method and its variations are adequate to be used in mark-release-recapture studies on odonates. Recommendations are given on what has to be avoided to eliminate potential effects during the marking procedure.

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