The protozoan parasite<i>Trichomonas gallinae</i>causes adult and nestling mortality in a declining population of European Turtle Doves,<i>Streptopelia turtur</i>

Stockdale, Jennifer E.; Dunn, Jenny C.; Goodman, Simon J.; Morris, Antony J.; Sheehan, Danaë K.; Grice, Philip V.; Hamer, Keith C.

doi:10.1017/s0031182014001474

Cited by 50 publications

(63 citation statements)

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“…The positive associations between turtle dove condition and the proportion of fed, cultivated and brassica taxonomic units in the diet of adult turtle doves suggest that anthropogenic food makes up for a shortfall in availability of other food resources, especially prior to the onset of breeding (when adult birds were sampled). The addition of wild bird seed mixes to turtle dove diet may have had further consequences, with the possibility of increased exposure to parasites such as Trichomonas gallinae (Stockdale et al., ), a parasite transmitted at shared food and water resources (Stabler, ), linked to feeding on resources commonly shared with other species (Lennon et al., ). However, the negative relationship between fed and brassica dietary components and nestling condition, and positive association with natural dietary components, suggests that reproductive success is still reliant upon the availability of natural food resources.…”

Section: Discussionmentioning

confidence: 99%

The decline of the Turtle Dove: Dietary associations with body condition and competition with other columbids analysed using high‐throughput sequencing

et al. 2018

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Dietary changes linked to the availability of anthropogenic food resources can have complex implications for species and ecosystems, especially when species are in decline. Here, we use recently developed primers targeting the ITS2 region of plants to characterize diet from faecal samples of four UK columbids, with particular focus on the European turtle dove (Streptopelia turtur), a rapidly declining obligate granivore. We examine dietary overlap between species (potential competition), associations with body condition in turtle doves and spatiotemporal variation in diet. We identified 143 taxonomic units, of which we classified 55% to species, another 34% to genus and the remaining 11% to family. We found significant dietary overlap between all columbid species, with the highest between turtle doves and stock doves (Columba oenas), then between turtle doves and woodpigeons (Columba palumbus). The lowest overlap was between woodpigeons and collared doves (Streptopelia decaocto). We show considerable change in columbid diets compared to previous studies, probably reflecting opportunistic foraging behaviour by columbids within a highly anthropogenically modified landscape, although our data for nonturtle doves should be considered preliminary. Nestling turtle doves in better condition had a higher dietary proportion of taxonomic units from natural arable plant species and a lower proportion of taxonomic units from anthropogenic food resources such as garden bird seed mixes and brassicas. This suggests that breeding ground conservation strategies for turtle doves should include provision of anthropogenic seeds for adults early in the breeding season, coupled with habitat rich in accessible seeds from arable plants once chicks have hatched.

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Section: Discussionmentioning

confidence: 99%

The decline of the Turtle Dove: Dietary associations with body condition and competition with other columbids analysed using high‐throughput sequencing

et al. 2018

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“…The avian influenza is a striking example, because feral water birds form the natural reservoir of these viruses474849. During the last decade, several investigations of feral birds have pointed at the increased disease risk by immunosuppression, which is also reflected in altered disease dynamics35051525354.…”

Section: Discussionmentioning

confidence: 99%

Widespread episodic thiamine deficiency in Northern Hemisphere wildlife

Balk

Hägerroth

Gustavsson

et al. 2016

Sci Rep

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Many wildlife populations are declining at rates higher than can be explained by known threats to biodiversity. Recently, thiamine (vitamin B1) deficiency has emerged as a possible contributing cause. Here, thiamine status was systematically investigated in three animal classes: bivalves, ray-finned fishes, and birds. Thiamine diphosphate is required as a cofactor in at least five life-sustaining enzymes that are required for basic cellular metabolism. Analysis of different phosphorylated forms of thiamine, as well as of activities and amount of holoenzyme and apoenzyme forms of thiamine-dependent enzymes, revealed episodically occurring thiamine deficiency in all three animal classes. These biochemical effects were also linked to secondary effects on growth, condition, liver size, blood chemistry and composition, histopathology, swimming behaviour and endurance, parasite infestation, and reproduction. It is unlikely that the thiamine deficiency is caused by impaired phosphorylation within the cells. Rather, the results point towards insufficient amounts of thiamine in the food. By investigating a large geographic area, by extending the focus from lethal to sublethal thiamine deficiency, and by linking biochemical alterations to secondary effects, we demonstrate that the problem of thiamine deficiency is considerably more widespread and severe than previously reported.

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“…Recent studies of Turtle-doves in Britain (Lennon et al, 2013;Stockdale et al, 2015) have shown that the protozoan parasite Trichomonas gallinae causes mortality of adults and chicks. For this reason, identifying and studying the sources and prevalence of parasitic diseases is of great importance, not only in North Africa, but in all countries frequented by the Turtle-dove.…”

Section: Parasites and Disease Researchmentioning

confidence: 99%

Analysis of Ring Recoveries of European Turtle DovesStreptopelia turtur— Flyways, Migration Timing and Origin Areas of Hunted Birds

2016

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The protozoan parasiteTrichomonas gallinaecauses adult and nestling mortality in a declining population of European Turtle Doves,Streptopelia turtur

Abstract: 23SG19 2DL, UK. +44 (0)

Cited by 50 publications

References 40 publications

The decline of the Turtle Dove: Dietary associations with body condition and competition with other columbids analysed using high‐throughput sequencing

The decline of the Turtle Dove: Dietary associations with body condition and competition with other columbids analysed using high‐throughput sequencing

Widespread episodic thiamine deficiency in Northern Hemisphere wildlife

Analysis of Ring Recoveries of European Turtle DovesStreptopelia turtur— Flyways, Migration Timing and Origin Areas of Hunted Birds

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