Garcia, P. J. and Tavecchia, G., 2018 Apparent survival and long-term population growth rate of the Kentish Plover Charadrius alexandrinus in Mallorca, Balearic Archipelago, Spain. Ardeola 65. 2-2. doi:
http://dx.doi.org/10.13157/arla.65.1.2018.sc2
This was a collaboration between the
GEDA and the
GOB aiming to estimate the survival probability of Kentish Plovers in Mallroca using data from 1977. The main question was whether there was a trend in survival probability in the last twenty years.
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| https://commons.wikimedia.org/wiki/File:Charadrius_alexandrinus_0711.jpg |
Abstract: During the last few decades, many breeding
waders have been declining worldwide, probably due to the reduction of suitable
coastal habitats. Diagnosis of population parameters has become increasingly
important for the conservation of waders.
We used capture-recapture information
of 214 adult Kentish Plovers
Charadrius
alexandrinus,
marked between 1977
and 2015 at two breeding areas in Mallorca, Spain, to assess any possible
temporal trend in the survival probability. Mean adult survival probability was
0.756 ± 0.05 with no differences between the two areas. The sparseness of the
data did not permit robust estimates of yearly survival. However, models with a
temporal trend in survival probability were not retained. An age-structured
population model including demographic stochasticity suggested a stable
population (l = 1.024
± 0.09). Perturbation analyses indicated that a 10% increase in mean breeding
success (from 0.44 to 0.63), by reducing habitat loss or nest predation, would
be sufficient to obtain positive population trajectories.
