Literature type: Scientific
Journal: Freshwater biology
Volume: 64 , Pages: 1183-1195.
Full reference: Jialin, L., Yifei, J., Yuyu, W., Guangchun, L., Cai, L., Neil, S., & Li, W. 2019. Behavioural plasticity and trophic niche shift: How wintering geese respond to habitat alteration. Freshwater biology 64: 1183-1195. https://www.dx.doi.org/10.1111/fwb.13294
1. The accelerated rate of human-induced environmental change poses a significant challenge for wildlife. The ability of wild animals to adapt to environmental changes has important consequences for their fitness, survival, and reproduction. Behavioural flexibility, an immediate adjustment of behaviour in response to environmental variability, may be particularly important for coping with anthropogenic change. The main aim of this study was to quantify the response of two wintering goose species (bean goose Anser fabalis and lesser white-fronted goose Anser erythropus) to poor habitat condition at population level by studying foraging behaviour. In addition, we tested whether behavioural plasticity could alter trophic niche. 2. We characterised foraging behaviours and calculated daily home range (HR) of the geese using global positioning system tracking data. We calculated standard ellipse areas to quantify niche width using the δ13C and δ15N values of individual geese. We linked behavioural plasticity with habitat quality using ANCOVA (analysis of covariance) models. We also tested the correlation between standard ellipse areas and HR using ANCOVA model. 3. We found significant differences in geese foraging behaviours between years in their daily foraging area, travel distance and speed, and turning angle. Specifically, the birds increased their foraging area to satisfy their daily energy intake requirement in response to poor habitat conditions. They flew more sinuously and travelled faster and longer distances on a daily basis. For the endangered lesser white-fronted goose, all behaviour variables were associated with habitat quality. For bean goose, only HR and turning angle were correlated with habitat quality. The birds, especially the lesser white-fronted goose, may have had a higher trophic position under poor conditions. 4. Our findings indicate that wintering geese showed a high degree of behavioural plasticity. However, more active foraging behaviours under poor habitat condition did not lead to a broader trophic niche. Habitat availability could be responsible to the divergent responses of foraging HR and isotopic niche to human-induced environmental change. Therefore, maintaining natural hydrological regimes during the critical period (i.e. September–November) to ensure that quality food
Literature type: Scientific
Journal: Biology Bulletin
Volume: 44 , Pages: 960–979Download:
Full reference: Rozenfeld, S. B., Soloviev, M.Yu., Kirtaev, G.V., Rogova, N.V. & Ivanov, M.N. 2017. Estimation of the Spatial and Habitat Distribution of Anseriformes in the Yamal-Nenets and Khanty-Mansi Autonomous Regions (Experience from the Use of Ultralight Aircrafts). Biology Bulletin 44: 960–979 https://www.dx.doi.org/10.1134/S1062359017080143
In Russia, the conservation of anseriformes is possible through the creation of temporary huntingfree zones during hunting season, especially in spring. A justification for creating such zones and outlining their boundaries (by analogy with the experience derived from the countries on North America) each season must be based on data on annual waterfowl monitoring. The present paper describes census experience drawn from the use of ultralight aviation for further delineating the key staging sites of waterfowl in western Siberia. To refine the duration of monitoring, observation data were combined with those derived from geese equipped with GSM-GPS transmitters. In the spring and autumn of 2012–2014, we covered over 50000 km of aerial surveys of 25 waterfowl species. A new method is advanced for assessing their numbers based on visual observations, flock photography, and modern statistics. We estimated the species densities in 16 habitat types delineated on the basis of Landsat imagery. In terms of this, a system is proposed for extrapolating the survey data on 25 waterfowl species onto model sites in western Siberia. Drops in the numbers of several mass game species were noted. Based on an evaluation of the habitat quality, ten waterfowl hunting-free zones were suggested and delineated. A GIS project was launched that incorporated the main migration routes, boundaries of the key sites, places of mass bird aggregations, and sites for the observation of rare, Red Data Book. A program of long-term monitoring and sustainable use of waterfowl in the study region is offered. Such an approach must also be applied to other regions of Russia.
Literature type: Scientific
Journal: Journal of Evolutionary Biology
Volume: 13 , Pages: 532-540.
Full reference: Ruokonen, M., Kvist, L. & Lumme, J. 2000. Close relatedness between mitochondrial DNA from seven Anser goose species. Journal of Evolutionary Biology 13: 532-540. https://www.dx.doi.org/DOI: 10.1046/j.1420-9101.2000.00184.x
The phylogenetic relationships of seven goose species and two of the subspecies representing the genus Anser were studied by approximately 1180 bp of mitochondrial DNA tRNAglu, control region and tRNAphe sequences. Despite obvious morphological and behavioural affinities among the species, their evolutionary relationships have not been studied previously. The small amount of genetic differentiation observed in the mitochondrial DNA indicates an extremely close evolutionary relationship between the Anser species. The sequence divergences between the species (0.9±5.5%) are among the lowest reported for avian species with speciation events of Anser geese dating to late Pliocene and Pleistocene. The species grouped into four mtDNA lineages: (1) snow and Ross' goose, (2) greylag goose, (3) white-fronted goose, and (4) bean, pink-footed and lesser white-fronted goose. The phylogenetic relationships of the most closely related species, bean, pink-footed and lesser white-fronted goose, indicate a period of rapid cladogenesis. The poor agreement between morphological relationships and the phylogenetic relationships indicated by mtDNA sequences implies that either ancestral polymorphism and lineage sorting, hybridization and introgression or convergent evolution has been involved.
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