Organochlorine and mercury residues in eggs of the lesser kestrel (Falco naumanni) from a long term study in the eastern Mediterranean

Goutner, Vassilis; Bakaloudis, Dimitrios E.; Papakosta, Malamati A.; Vlachos, Christos; Mattig, Frank R.; Pijanowska, Ursula; Becker, Peter

doi:10.1016/j.envpol.2015.09.021

Cited by 6 publications

(4 citation statements)

References 77 publications

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“…Choisy et al 1999;Lepley et al 2000;Prugnolle et al 2003;Mihoub et al 2012) and Greece (e.g. Vlachos et al 2003Vlachos et al , 2004aVlachos et al ,b, 2015Goutner et al 2015). Despite their usefulness in predicting future population dynamics and monitoring local environmental conditions, we only found two studies of nestling lesser kestrel growth patterns.…”

Section: Introductionmentioning

confidence: 82%

Patterns of postnatal growth in a small falcon, the lesser kestrelFalco naumanni(Fleischer, 1818) (Aves: Falconidae)

Braziotis

Liordos

Bakaloudis

et al. 2017

The European Zoological Journal

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Following a dramatic decline, the lesser kestrel Falco naumanni global population has recently stabilised, although it is still fluctuating in several countries, including Greece. Nestling growth rates and size at fledging greatly influence future survival and reproductive success, and therefore the study of postnatal growth can aid the understanding of population dynamics and the conservation of avian populations. We quantified body mass and morphological traits in female and male lesser kestrel nestlings from a lowland Greek breeding population. Nonlinear mixed models were used to describe and compare growth trajectories. Growth in body mass, tarsus and bill reached asymptotic values before fledging and was best described by the logistic equation, whereas total length grew linearly beyond the fledging phase. Random variation was found in the asymptote in body mass, the inflection point in body mass, tarsus and bill lengths and the intercept in total length, being substantially higher between nests than amongst siblings, implying differences in parental quality between nests and also an even distribution of parental care amongst siblings. Random effects were not observed on the growth rate constant, supporting the hypothesis that it varies little within populations. Females were significantly heavier and had longer bills and total length than males, whereas males were similar to females in tarsus growth. Nonlinear mixed models allowed us to describe a stage of avian life vital for future survival and reproductive output and reveal variation between nests, nestlings and the sexes.

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Section: Introductionmentioning

confidence: 82%

Patterns of postnatal growth in a small falcon, the lesser kestrelFalco naumanni(Fleischer, 1818) (Aves: Falconidae)

Braziotis

Liordos

Bakaloudis

et al. 2017

The European Zoological Journal

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“…On the other hand, the median concentration of lindane for all species was 0.18 ng g − 1 ww/1.58 ng g − 1 lw (maximum = 33.3 ng g − 1 ww/ 567 ng g − 1 lw), lower than the one reported by Augspurger and Boynton (1998) in peregrine falcon (Falco peregrinus) eggs (range = 10-30 ng g − 1 ww) that had no apparent effects on reproduction. In addition, the median concentration of HCB was 0.22 ng g − 1 ww/4.03 ng g − 1 lw (maximum = 7.46 ng g − 1 ww/65.5 ng g − 1 lw) which is below 4 μg g − 1 ww, a threshold related with biological effects in birds (Goutner et al, 2015). Therefore, these results suggest that HCB and lindane contamination do not pose a high risk to the investigated species while 4,4 ′ -DDE contamination might pose a risk to gull-billed terns and booted eagles.…”

Section: Occurrence and Levels Of Pesticidesmentioning

confidence: 91%

Pesticide Contamination of Bird Species from Doñana National Park (Southwestern Spain): Temporal Trends (1999-2021) and Reproductive Impacts

Peris¹,

Baos²,

Martínez³

et al. 2022

SSRN Journal

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“…2007, Goutner et al . 2015). More importance has been given to indirect effects of pesticide use, through a reduction in the availability of prey.…”

mentioning

confidence: 99%

“…With regard to pesticides, several studies have analysed their direct effects on Lesser Kestrel, which seem to be mild in recent years and insufficient to explain its population decline , Vergara et al 2007, Goutner et al 2015. More importance has been given to indirect effects of pesticide use, through a reduction in the availability of prey.…”

mentioning

confidence: 99%

Causes of the recent decline of a Lesser Kestrel (Falco naumanni) population under an enhanced conservation scenario

Aparicio

Muñoz

Bonal

2022

Ibis

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Lesser Kestrel Falco naumanni (Fleischer, 1818) populations have been one of the best monitored bird populations in Spain over the last 70 years. These populations suffered a sharp decline between the 1950s and 1990s. Since then, periodic censuses showed a population increase that lasted until the 2010s. In those years, numerous projects for the recovery of the species were also initiated (some EU LIFE Projects, among others), which have continued to the present day. However, despite conservation efforts, the Spanish Lesser Kestrel population, which includes about 40% of the European breeding population, has declined at a rate of 6% per year since 2012. In this study, we analysed changes in habitat and population size in 12 colonies located in La Mancha between 2003 and 2021 in order to identify possible causes of the current decline. This colonial species breeds in old buildings, and roof area (a proxy for house size) was the predictor that best accounted for the number of pairs in a colony in a given year. In addition, the extent of herbaceous crops (related to prey availability) explained a similar amount of colony size variance in 2021, whereas in 2003, the availability of large Orthoptera itself had a significant effect but a much lower effect size. The number of nestboxes affected positively the number of breeding pairs in 2021 but explained only 1% of the variance. The decline of the Lesser Kestrel population between 2003 and 2021 was largely explained by the decrease of the density of large orthopterans, their main prey. The model with the minimum Akaike Information criterion adjusted for small sample size (AICc) value also included a positive association with changes in roof area and a negative association with rabbit density (possibly through a hyperpredation phenomenon). Other top models (i.e. ΔAICc ≤ 2 units) also showed negative effects of the loss of favourable land uses (pasture lands and herbaceous crops) on colony size, probably because this caused a reduction in the availability of large Orthoptera. These changes in land use occurred less often in areas protected by the Natura 2000 network, which may thus have contributed to the conservation of the Lesser Kestrel population. However, other conservation measures such as the installation of nestboxes were not as efficient as expected.

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Organochlorine and mercury residues in eggs of the lesser kestrel (Falco naumanni) from a long term study in the eastern Mediterranean

Cited by 6 publications

References 77 publications

Patterns of postnatal growth in a small falcon, the lesser kestrelFalco naumanni(Fleischer, 1818) (Aves: Falconidae)

Patterns of postnatal growth in a small falcon, the lesser kestrelFalco naumanni(Fleischer, 1818) (Aves: Falconidae)

Pesticide Contamination of Bird Species from Doñana National Park (Southwestern Spain): Temporal Trends (1999-2021) and Reproductive Impacts

Causes of the recent decline of a Lesser Kestrel (Falco naumanni) population under an enhanced conservation scenario

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