Papers by Jos C E W Hooijmeijer
The Rice Fields Around the Estuaries of the Tejo and Sado Are a Critical Stopover Area for the Globally Near-Threatened Black-Tailed Godwit Limosa L. Limosa: Site …
rug.nl, 2009
Page 1. Airo 19: 19-26 (2009) SUMMARY - Rice fields are a globally important habitat for waterbir... more Page 1. Airo 19: 19-26 (2009) SUMMARY - Rice fields are a globally important habitat for waterbirds. Portugal is one of the main rice producers in Europe, but little is known about how these rizicultures are used by the avifauna. ...
High Resolution Mass Spectrometric Suspect Screening, Wide-Scope Target Analysis of Emerging Contaminants and Determination of Legacy Pollutants in Adult Western Black-Tailed Godwit Limosa Limosa Limosa in the Netherlands – a Pilot Study
Social Science Research Network, 2022
Behavioral Ecology, Feb 22, 2019
The adult sex ratio (ASR) is a crucial component of the ecological and evolutionary forces shapin... more The adult sex ratio (ASR) is a crucial component of the ecological and evolutionary forces shaping the dynamics of a population. Although in many declining populations ASRs have been reported to be skewed, empirical studies exploring the demographic factors shaping ASRs are still rare. In this study of the socially monogamous and sexually dimorphic Black-tailed Godwit (Limosa limosa limosa), we aim to evaluate the sex ratio of chicks at hatch and the subsequent sex-specific survival differences occurring over 3 subsequent life stages. We found that, at hatch, the sex ratio did not deviate from parity. However, the survival of pre-fledged females was 15-30% lower than that of males and the sex bias in survival was higher in low-quality habitat. Additionally, survival of adult females was almost 5% lower than that of adult males. Because survival rates of males and females did not differ during other life-history stages, the ASR in the population was biased toward males. Because females are larger than males, food limitations during development or sex-specific differences in the duration of development may explain the lower survival of female chicks. Differences among adults are less obvious and suggest previously unknown sex-related selection pressures. Irrespective of the underlying causes, by reducing the available number of females in this socially monogamous species, a male-biased ASR is likely to contribute to the ongoing decline of the Dutch godwit population.
Boekbespreking: Steltlopers van Europa
De Levende Natuur, 2017
Natuur in Nederland Dit cahier is een uitgave van Stichting Biowetenschappen en Maatschappij (BWM... more Natuur in Nederland Dit cahier is een uitgave van Stichting Biowetenschappen en Maatschappij (BWM) en verschijnt vier maal per jaar. Elk nummer is geheel gewijd aan een thema uit de levenswetenschappen, speciaal met het oog op de maatschappelijke gevolgen ervan.
Forensische DNA-methoden in het boerenland: Was het misvormde ei van zendergrutto Heidenskip?
Limosa, 2011
Black-tailed Godwits were implanted with satellite transmitters to study their migration and wint... more Black-tailed Godwits were implanted with satellite transmitters to study their migration and wintering patterns in 2009. In the breeding season of 2010 the discovery of a clutch with strangely shaped eggs suggested that the transmitters might negatively affect reproduction. One year later a similar strangely shaped egg was found in the territory of one of the transmitter birds. We used molecular DNA techniques to prove that this egg had been laid by this transmitter female. This suggests that birds with implanted transmitters show normal breeding behaviour and try to reproduce, but that as the eggs are deformed, implanted satellite transmitters physically prevent reproduction in Black-tailed godwits.
Ibis, Jun 18, 2013
Recently, Schroeder et al. (2010, Ibis 152: 368-377) suggested that intronic variation in the CHD... more Recently, Schroeder et al. (2010, Ibis 152: 368-377) suggested that intronic variation in the CHD1-Z gene of Black-tailed Godwits breeding in southwest Friesland, The Netherlands, correlated with fitness components. Here we reexamine this surprising result using an expanded dataset (2088 birds sampled from 2004 to 2010 vs. 284 birds from 2004 to 2007). We find that the presence of the Z* allele (9% of the birds) is not associated with breeding habitat type, egg size, adult survival, adult body mass or adult body condition. The results presented here, when used in synergy with the previously reported results by Schroeder et al., suggest that there might be a tendency towards female adults with the Z* allele laying earlier clutches than adult females without the Z* allele. The occurrence of the Z* allele was also associated with a higher chick body mass and return rate. Chicks with the Z* allele that had hatched early in the breeding season were heavier at birth than chicks without the Z* allele and chicks with the Z* allele that had hatched late. Collectively, the results suggest that variation in the CHD1-Z gene may indeed have arisen as a byproduct of selection acting on females during the egg fase and on chicks during the rearing stages of the reproductive cycle.
Research Square (Research Square), Apr 20, 2023
Background. Due to the large errors in Argos Doppler location estimates, Argos-based satellite tr... more Background. Due to the large errors in Argos Doppler location estimates, Argos-based satellite transmitter data are rarely used in studies of ne-scale habitat selection by animals. Novel state-space models (SSMs) for path reconstruction from animal movement data improve location estimates, delivering re ned estimations of an animal's most likely path and, also, re-estimating the uncertainties for each location. However, the SSM-re ned uncertainties are still relatively large and the true locations of animals tracked with PTTs (Platform terminal transmitters) remain impossible to determine. We suggest an approach that uses the SSM-re ned location uncertainties to quantify the probabilities of an animal's occurrence in each habitat and infer which of the habitats it most likely visited. Methods. We test the performance of our approach against habitat use assays based on most likely locations from raw Argos Doppler estimates and Argos Doppler estimates re ned with an SSM. For this, we combine a GPS tracking dataset (2214 location xes) from one individual and an Argos-PTT tracking dataset (1708 location points) from 14 individual Continental Black-tailed Godwits (Limosa limosa limosa) breeding in agricultural grasslands in The Netherlands utilizing both simulations and empirical data to assess habitat use. Results. The approach that accounted for location uncertainties on top of a state-space model improved habitat assignments in the simulation study by 5% compared with only the SSM-re ned Argos location points and by 23% compared with the raw Argos locations. We provide working code in R that can be reproduced for the analysis of habitat selection of animals followed with PTTs. Conclusions. Low-precision tracking data may be suitable to study habitat selection if location uncertainties are taken into account. The approach presented here has the potential to considerably improve the validity of such
Replication Data for: Quantifying landscape-level land use intensity patterns through radar-based remote sensing
The data package consists of four (zipped) folders and this metadata file: FINAL DATA --> Godw... more The data package consists of four (zipped) folders and this metadata file: FINAL DATA --> Godwit Early Establishement - Data collected by a large team lead by Professor Theunis Piersma (permission to use this data). Folder contains the locations of black tailed godwits counts early 1 March to 1 May 2016. Data were used to calculate habitat selection indices of early establishing black-tailed godwits. --> LogRatio_Date_Pairs Log ratio change detection analyses carried out on Sentinel SAR1 data clipped out for the south-west Friesland study site. Used to produce Table 1, Figure 1c &d, Fig 3 and Fig 6 --> Processed Modis EVI, Comparison between Sentinel Radar and Optical Modis EVI Data used to produce figure 1a & b --> Processed_Radar_Imagery, contains the variance in Sentinel Radar and standard deviation of change in Sentinel Radar values between 31 March and 17 July 2016 --> Shapefiles, contains all point, line and polygon shapefiles used to intersect the spatial analysis data. --> StDev_LogRatioChange31Mar_17Jul2016, standard deviation of change in Sentinel Radar values between 31 March and 17 July 2016 - used in final ESRI mxd file to produce figures 3a and 6a --> Temperature_Stavoren, downloaded from KNMI website and used to produce temperature variation in Figure 1a & 1c --> two data files parcel55_combined_veg_radar_evi.txt parcel55_detailed_transects_2016.txt compiled data used to produce figures 4 and 5 FINAL FIGURES Final high quality figures produced for the final print. FINAL MAP PROJECTS Esri (ArcMap 10.3) map Project used to produce figures 3a & 6a. FINAL SCRIPTS R version 3.4.0, R Studio 5.4.1 Analysis scripts used to produce the figures for this manuscript and labelled as such. In addition a pre-processing script that allows the user to stack Sentinel SAR1 data after it has been downloaded from the Sentinel Scientific Hub and processed with SNAP v6.0. Add orbit file > ratiometric calibration > geometric terrain correction
Ardea, Feb 2, 2022
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
Grutto Landschap Project: Jaarverslag 2020
UG, WUR, EIS, Apr 1, 2021
Grutto landschap project: jaarverslag 2020: “On the way to Godwit-proof…..”: De staat van ons landschap: biomonitoring van duurzame landbouw innovaties
Rijksuniversiteit Groningen, Groningen Institute for Evolutionary Life Sciences (GELIFES), Conservation Ecology Group, 2021
Ornithological observations in Senegal. We present observations made in Senegal in January 2015. ... more Ornithological observations in Senegal. We present observations made in Senegal in January 2015. Five sightings of rare species are described: a White-crested Tiger Heron Tigriornis leucolopha in the Saloum delta, a Shorteared Owl Asio flammeus in Madeleine Islands National Park, an Egyptian Nightjar Caprimulgus aegyptius in Djoudj National Park, a Shining-blue Kingfisher Alcedo quadribrachys in Niokolo-Koba National Park, and a Greater Hoopoe Lark Alaemon alaudipes in the Ndiael reserve. The predation of a Cattle Egret Bubulcus ibis by a Martial Eagle Polemaetus bellicosus, and the life history of a ringed Black-tailed Godwit Limosa limosa, are presented.
Ardea, 2020
As is the case for most avian species, there is considerable variation in the egg size of Contine... more As is the case for most avian species, there is considerable variation in the egg size of Continental Black-tailed Godwits Limosa l. limosa breeding in The Netherlands. It is interesting that egg size has costs and benefits yet varies considerably at the population level. To better understand this variation in egg size, we tested its relationship to a suite of individual and environmental factors. We found that egg size can decrease up to 2.8% throughout a breeding season and that egg size increases with clutch size by 1.4% with each additional egg in the clutch. Female body mass and body size explained 5% of the total variation in egg size observed across the population. Furthermore, females wintering south of the Sahara laid 3% smaller eggs than those wintering north of the Sahara. We also found that egg size increases with age, which may indicate age-related differences in the endogenous and/or exogenous conditions of females. The variation in egg size was, however, mostly the result of consistent differences among individuals across years (repeatability = 0.60). A comparison of daughters with mothers suggested that most of this individual repeatability reflects heritable variation (heritability = 0.64). The actual individual traits that underlie this heritable variation among individuals remain mostly undetermined. Smaller eggs did have a slightly lower chance of hatching, but we found no relationship between egg size and chick survival. Finally, nest and chick survival were strongly correlated with lay date. Thus, in Black-tailed Godwits, lay date may actually reflect a female's endogenous and/or exogenous condition at the moment of egg-laying. This finding may be general across birds, since food supplementation experiments usually result in advanced laying and larger clutch sizes rather than in larger eggs.
Ardea, 2012
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
Individual characteristics, timing and environmental factors influencing reproductive success in Black-tailed Godwits
Fig. S1. Seasonal patterns in the recording of the intensity of the rusty-brown neck collars in t... more Fig. S1. Seasonal patterns in the recording of the intensity of the rusty-brown neck collars in the staging population of Ruffs in Friesland, The Netherlands. Table S1. Model selection to determine factors involved in the occurrence of rusty-brown neck collars in Ruffs migrating northward through Friesland, The Netherlands.
Bird Study, Jan 2, 2018
Capsule: Most Continental Black-tailed Godwits Limosa limosa limosa using the Doñana wetlands dur... more Capsule: Most Continental Black-tailed Godwits Limosa limosa limosa using the Doñana wetlands during post-breeding migration appear to begin moult before they arrive and suspend moult before they migrate onwards to West Africa. Aims: We aim to describe the primary moult strategies and patterns in the Continental Black-tailed Godwits using the Doñana wetlands, a major passage and wintering area for waterbirds in southern Spain. Methods: Individual godwits were captured, marked and their primary moult was scored in Doñana during the non-breeding season (June-March) in 2011 and 2012. Data from resightings of colourmarked godwits and birds equipped with satellite transmitters were used to estimate stopover duration during post-breeding migration (June-September) to determine if godwits move to West Africa before completing their primary moult. Results: Average primary moult duration was estimated to be 84 days ± 9 se, during 29 June-21 September and did not differ between sexes. Only 2% of individuals were observed with suspended moult. We estimated stopover duration in Doñana to be 13 days ± 2 se before migrating to West Africa. Conclusions: Most godwits stage for about two weeks in the Doñana wetlands during southward migration, moult their primaries and appear to suspend moult before crossing the Sahara. Others may complete their primary moult in Doñana, or elsewhere in Europe and overwinter in Doñana where increasing numbers of godwits have been detected in recent years. A few individuals may finish the moult in Doñana and migrate to West Africa late in the post-breeding season.
Bird Study, Jan 2, 2020
Capsule: Black-tailed Godwits Limosa limosa show sexual size dimorphism and size differences betw... more Capsule: Black-tailed Godwits Limosa limosa show sexual size dimorphism and size differences between the subspecies. The shape varies slightly between the subspecies, but not between the sexes. Aims: To investigate whether and how the three subspecies of Black-tailed Godwits, and the sexes of these subspecies, differ in size and shape. Methods: We collected body dimensions (lengths of the bill, total head, tarsus, tarsus-toe and wing) of adult Black-tailed Godwits from three locations (Iceland, the Netherlands and northwest Australia) corresponding to the breeding or wintering grounds of three known subspecies (islandica, limosa and melanuroides, respectively). Determining sex by molecular assays, we computed degrees of sexual size dimorphism. Using principal component analysis (PCA), we compared differences in size and shape among the different subspecies. Results: The limosa subspecies was the largest and also showed the most significant sexual size dimorphism. Sexual size dimorphism was smallest for wing length and largest for bill length. The first two axes of the PCA that included all subspecies of both sexes explained 94% of the total variation. Most body dimensions were highly correlated with each other, but wing length varied independently of the other dimensions. Males and females differed only in size (the first axis). However, one of the two small subspecies, islandica, also differed in shape (the second axis) from limosa and melanuroides. Conclusions: In all three subspecies of Black-tailed Godwits, females are larger than males. The fact that subspecies differed in the degree of size dimorphism and slightly in shape hints at sex-related differences in the ecological selection pressures between the different flyways.
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Papers by Jos C E W Hooijmeijer