Timing of breeding, habitat preference and reproductive success of marsh harriers (Circus aeruginosus)

Němečková, Ivana; Mrlík, V.; Drozd, Pavel

doi:10.2478/s11756-008-0030-2

Cited by 9 publications

(4 citation statements)

References 25 publications

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“…For instance, average clutch size in our study was smaller than recorded in the Barycz valley in SW Poland (5.0; Witkowski 1989), similar to that reported in Finland (4.66;Cramp 1980) and in the Netherlands (4.59-4.68; Dijkstra & Zi-jlstra 1997), and larger than the average clutch size recorded in Czech Republic (4. 06-4.24;Nfmecková et al 2008). In general, clutch size is related to food conditions (Lack 1966), and one could argue that the food resource in our study population was stable during study period.…”

Section: Resultsmentioning

confidence: 82%

Clutch and egg size variation in the Marsh Harrier Circus aeruginosus in eastern Poland

Polak

2010

Ornis Svec

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The main aim of this study was to examine how clutch size and season influenced egg size in a population of Marsh Harriers Circus aeruginosus in eastern Poland. The Marsh Harriers nested in small, isolated patches of reed belts surrounding fish ponds. A total of 328 eggs from 70 clutches were measured during four nesting seasons (2005–2008). Average clutch size was 4.69 ± 0.71 eggs and did not vary between years; the modal clutch size was 5 eggs. Mean values of the egg dimensions were: egg length = 48.60 ± 1.78 mm; egg breadth = 38.36 ± 1.13 mm; egg volume = 36.53 ± 2.99 cm3. There was a strong correlation between egg length and egg breadth. The number of eggs in a clutch had no effect on the egg size.

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Section: Resultsmentioning

confidence: 82%

Clutch and egg size variation in the Marsh Harrier Circus aeruginosus in eastern Poland

Polak

2010

Ornis Svec

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“…For example, the colonially nesting Little Egret ( Egretta garzetta ) and the Cattle Egret ( Bubulcus ibis ) are separated in the use of the temporal niche dimension, as the hatching time of the Little Egret peaks earlier (about 1 month) than that of the Cattle Egret (Ye et al., 2021 ). Considering that the timing of reproduction has a strong impact on the breeding success of birds (Nemecková et al., 2008 ) and that differentiation in timing plays a crucial role in species coexistence, as it is related to nest sites and food resources (Ye et al., 2019 , 2021 ), the breeding times of sympatric species using similar ecological niches should differ (Sanz‐Aguilar et al., 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Multi‐dimensional niche differentiation of two sympatric breeding secondary cave‐nesting birds in Northeast China using DNA metabarcoding

Zhang,

Liu,

Sun

et al. 2024

Ecology and Evolution

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Niche theory predicts that ecologically similar sympatric species should show differentiation in at least one of the main niche dimensions (time, space, and/or food). Here, we combined observations of breeding timing, nest site selection, and diet (the latter determined using DNA metabarcoding) to analyze the niche overlap and differentiation between two sympatric secondary cavity‐nesting birds, the Japanese Tit Parus minor and the Yellow‐rumped Flycatcher Ficedula zanthopygia. The results showed that (1) there were significant differences in the first egg laying date, length of the egg laying period, incubation date, and hatching date between tits and flycatchers, and the breeding time of flycatchers peaked later (about 30 days) than that of tits; (2) the two species had a large overlap in nest site selection, although the canopy coverage and shrub density of flycatchers were significantly higher than those of tits; and (3) the niche overlap in diet was minimal, with both species heavily relying on Lepidoptera (39.6% and 63.7% for tits and flycatchers, respectively), but with flycatchers consuming significantly higher percentages of Lepidoptera, Diptera, and Coleoptera than tits. The results indicate that these two sympatric secondary cavity‐nesting species have significant niche differentiation in breeding time and diet, but little differentiation in nest site selection.

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“…The aim of the present study was to investigate for the first-time key factors affecting the nest survival rate in Marsh Harrier in wetland habitats with varied vegetation structures and hydrological regimes. Vegetation and wetland characteristics are important factors affecting nest site selection in this species ( Stanevičius, 2004 ; Němečková, Mrlík & Drozd, 2008 ). In addition, nest site selection appears to be affected not only by nesting habitat quality but also by the presence of conspecifics using the nearby wetland as a foraging area ( Cardador, Carrete & Manosa, 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of nest age and habitat variables on nest survival in Marsh Harrier (Circus aeruginosus) in a fishpond habitat

Zaremba¹,

Kasprzykowski²,

Goławski³

2020

PeerJ

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Background One important anti‐predator strategy adopted by birds involves nest site selection and timing of breeding. Nest-site selection by marsh-nesting birds often involves nest concealment and water depth as key features influencing nest survival. Marsh Harrier (Circus aeruginosus) is an obligate ground nester, which sets it apart from other raptors. The aim of the present study was to identify for the first time possible temporal and habitat factors affecting nest survival in Marsh Harrier. Understanding features which affect nest survival are essential for assessing relevant conservation strategies. Methods To understand the relative contributions of different temporal and habitat variables to brood losses, it is useful to determine the daily survival rate (DSR). We examined 82 Marsh Harrier nests located on fishponds in eastern Poland, where predation is the main cause of nest loss. Six habitat variables were measured for each active nest. DSR was calculated using known-fate models with the RMark package. Results The best-supported model predicted that DSR decreased with nest age and was positively affected by the water depth and the diameter of reed stems, but not by the height or density of vegetation at the nest site. The distances of nests to the fishpond dyke and to open water received no support in the models. The chances of nest survival were lower if a neighbouring nest had been depredated. This result suggests that the Marsh Harrier is more susceptible to mammalian than avian predation and confirms the high level of predator pressure in fishpond habitats.

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Timing of breeding, habitat preference and reproductive success of marsh harriers (Circus aeruginosus)

Cited by 9 publications

References 25 publications

Clutch and egg size variation in the Marsh Harrier Circus aeruginosus in eastern Poland

Clutch and egg size variation in the Marsh Harrier Circus aeruginosus in eastern Poland

Multi‐dimensional niche differentiation of two sympatric breeding secondary cave‐nesting birds in Northeast China using DNA metabarcoding

Effect of nest age and habitat variables on nest survival in Marsh Harrier (Circus aeruginosus) in a fishpond habitat

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