Dispersal of the White Stork Ciconia ciconia in the Lonjsko polje Nature Park, Croatia

Ječmenica, Biljana; Kralj, Jelena

doi:10.21857/ygjwrcjl5y

Cited by 2 publications

(2 citation statements)

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“…Dispersal is a highly influential parameter for which data are not yet available as the majority of the population are still sub-adults which exhibit more exploratory behaviours than breeding adults, and so it may still be a few years before the general trend in dispersal is understood (Chernetsov et al 2006, Itonaga 2009, Vergara et al 2007). In white storks natal dispersal occurs more commonly than breeding dispersal, and often occurs along their migration routes, although the availability of suitable nesting habitats is also influential (Chernetsov et al 2006, Itonaga et al 2010, Rojas et al 2016, Ječmenica and Kralj 2017). This suggests that some of the storks released in the UK may be attracted to joining the larger French and Iberian colonies that are found along the western flyway which would reduce the British population’s growth rate (Thomsen and Hötker 2013).…”

Section: Discussionmentioning

confidence: 99%

Demographic consequences of management actions for the successful reintroduction of the White Stork Ciconia ciconia to the UK

Mayall

Groves

Kennerley

et al. 2023

Bird Conservation International

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Summary Species reintroductions can be used in conservation management to increase biodiversity and aid in restoring ecosystem function. For reintroductions to be successful, it is important to identify the conditions required to establish a viable population. We developed a demographic model using Vortex10, an individual-based simulation software, to assess the long-term consequences of different management interventions on the success of the recent reintroduction of the white stork, Ciconia ciconia, to the UK. Demographic data obtained from this reintroduced population were supplemented with information from western European populations to build the models. The impact of incorporating different management actions (e.g. supplementing with captive-bred juveniles, provision of nesting platforms, and habitat improvement/supplementary feeding) on the stochastic population growth rate was assessed. Survival rates also differ depending on an individual’s migratory strategy, hence we tested the impact of having different proportions of the population as residents or migrants. Our models showed that if the British stork population adopts a fully migratory strategy, with its associated higher mortality rates, i.e. all individuals migrating to southern Europe or northern Africa, increasing the supplementation rate would not lead to a positive population growth rate. However, management actions which increased the number of fledglings per nest generated a slight positive growth rate that led to a 54.3% increase in population size after 50 years and, when combining all three management options, the population grew by 378.3%. Alternatively, if a minimum of 9% of individuals overwintered in Britain, which is likely based on field observations and tracking data, a positive growth rate can be achieved without additional management due to this behaviour’s lower mortality rates. We conclude that the British white stork population will likely be viable in the long term, but these models and projections should be updated as more demographic data on this novel population become available.

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Section: Discussionmentioning

confidence: 99%

Demographic consequences of management actions for the successful reintroduction of the White Stork Ciconia ciconia to the UK

Mayall

Groves

Kennerley

et al. 2023

Bird Conservation International

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“…Breeding white storks are conservative in their habitat selection, with significantly smaller home ranges, when compared to non-breeding white storks [ 29 ]. Moreover, white storks have low reproductive dispersal and usually return to the same nest as in previous years [ 30 ]. Therefore, the content of anthropogenic particles in the pellets could reflect the local environmental burden and trophic transfer.…”

Section: Introductionmentioning

confidence: 99%

White Stork Pellets: Non-Invasive Solution to Monitor Anthropogenic Particle Pollution

Bjedov,

Mikuška,

Gvozdić

et al. 2024

Toxics

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The present study applied a non-invasive method to analyse anthropogenic particles and prey items in white stork (Ciconia ciconia) pellets. Pellets (n = 20) were obtained from white stork nests during the 2020 breeding season from two sites in Croatia. In total, 7869 anthropogenic particles were isolated. The majority of particles were fragments, while previous studies on other birds often reported fibres. An ATR–FTIR polymer analysis detected glass and construction and building materials, as well as several compounds associated with plastic masses. Polymer investigation revealed the presence of dotriacontane and octacosane, which are by-products of polyethylene (PE) degradation and transformation. Additionally, the detection of vinylidene chloride (VDC) highlights the historical contribution of polyvinylidene chloride (PVDC) to plastic pollution. Significant variation in particle quantity and size between the sampling sites was detected, with larger particles found at sites associated with the metal mechanical engineering industry and agriculture. Prey assessment revealed chitin remains of large insects such as Orthoptera and Coleoptera. This research confirms the potential of pellet analysis as a valuable tool for assessing the presence of anthropogenic particles in the environment. However, further research is needed to fully understand the extent of particle ingestion, particle sources and potential impact.

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Dispersal of the White Stork Ciconia ciconia in the Lonjsko polje Nature Park, Croatia

Cited by 2 publications

References 10 publications

Demographic consequences of management actions for the successful reintroduction of the White Stork Ciconia ciconia to the UK

Demographic consequences of management actions for the successful reintroduction of the White Stork Ciconia ciconia to the UK

White Stork Pellets: Non-Invasive Solution to Monitor Anthropogenic Particle Pollution

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