scholarly journals Recent changes in the reproductive success of farmland birds: conservation and management implications. The declining grey partridge Perdix perdix as a case study

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Sylvain Godin ◽  
François Reitz ◽  
Léo Bacon ◽  
Elisabeth Bro
Keyword(s):  
Reproductive Success ◽  
Farmland Birds ◽  
Management Implications ◽  
Perdix Perdix ◽  
Grey Partridge ◽  
Conservation And Management

scholarly journals Rural landscape dynamics over time and its consequences for habitat preference patterns of the grey partridge Perdix perdix

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0255483
Author(s):  
Sabine Marlene Hille ◽  
Eva Maria Schöll ◽  
Stéphanie Schai-Braun
Keyword(s):  
Agricultural Landscape ◽  
Habitat Preferences ◽  
Bird Species ◽  
Agricultural Practices ◽  
Rural Landscape ◽  
Landscape Changes ◽  
Farmland Birds ◽  
Perdix Perdix ◽  
Grey Partridge ◽  
Over Time

Intensification of agricultural practices has drastically shaped farmland landscapes and generally caused a decline in spatial and temporal heterogeneity, thus leading to changes in habitat quality and food resources and a decline for most farmland birds Europe-wide. The relationship between complex landscape changes and habitat preferences of animals still remains poorly understood. Particularly, temporal and spatial changes in diversity may affect not only habitat choice but also population sizes. To answer that question, we have looked into a severely declining typical farmland bird species, the grey partridge Perdix perdix in a diverse farmland landscape near Vienna to investigate the specific habitat preferences in respect to the change of agricultural landscape over two decades and geographic scales. Using a dataset collected over 7.64 km² and between 2001 and 2017 around Vienna, we calculated Chesson’s electivity index to study the partridge’s change of habitat selection over time on two scales and between winter and spring in 2017. Although the farmland landscape underwent an ongoing diversification over the two decades, the grey partridges declined in numbers and shifted habitat use to less diverse habitats. During covey period in winter, partridges preferred also human infrastructure reservoirs such as roads and used more diverse areas with smaller fields than during breeding where they selected harvested fields but surprisingly, avoided hedges, fallow land and greening. Known as best partridge habitats, those structures when inappropriately managed might rather function as predator reservoirs. The avoidance behaviour may further be a consequence of increasing landscape structuring and edge effects by civilisation constructions. Besides, the loss in size and quality of partridge farmland is altered by crop choice and pesticides reducing plant and insect food. With declining breeding pairs, the grey partridge does not seem to adjust to these unsustainable landscape changes and farmland practices.

scholarly journals Intensive supplementary feeding improves the performance of wild bird seed plots in provisioning farmland birds throughout the winter: a case study in lowland England

Bird Study ◽  
2021 ◽  
pp. 1-11
Author(s):  
Richard K. Broughton ◽  
Michael G.W. Kettlewell ◽  
Marta Maziarz ◽  
Stephen H. Vickers ◽  
Alan Larkman ◽  
...  
Keyword(s):  
Wild Bird ◽  
Supplementary Feeding ◽  
Farmland Birds

Testosterone Affects the Acoustic Structure of the Male Call in the Grey Partridge (Perdix Perdix)

Behaviour ◽  
1994 ◽  
Vol 128 (3-4) ◽  
pp. 301-310 ◽  
Author(s):  
L. Beani ◽  
L. Fusani ◽  
F. Dessi-Fulgheri
Keyword(s):  
Acoustic Structure ◽  
Perdix Perdix ◽  
Grey Partridge

scholarly journals Population characteristics, space use and habitat associations of the seahorse Hippocampus reidi (Teleostei: Syngnathidae)

2007 ◽  
Vol 5 (3) ◽  
pp. 405-414 ◽  
Author(s):  
Ierecê Lucena Rosa ◽  
Tacyana P. R. Oliveira ◽  
André L. C. Castro ◽  
Luiz E. de Souza Moraes ◽  
Josias H. A. Xavier ◽  
...  
Keyword(s):  
Habitat Structure ◽  
Habitat Associations ◽  
Population Characteristics ◽  
Brazilian Coast ◽  
Life Stages ◽  
Unequal Distribution ◽  
Ecological Information ◽  
Spatial Use ◽  
Conservation And Management

This paper provides a case study of a threatened seahorse species, Hippocampus reidi, highlighting the importance of using ecological information to assist conservation and management initiatives. Underwater visual sighting data (50 x 2m transect) gathered along the NE, SE and S portions of the Brazilian coast revealed an unequal distribution across localities, perhaps related to harvesting pressure, and a mean density of 0.026 ind.m-2. Our findings suggest some restricted spatial use by H. reidi, which was consistent with its estimated home range, and with re-sighting of specimens. Reproduction was recorded year-round, however productive peaks may exist. Components of habitat structure mostly used as anchoring points were mangrove plants, macroalgae, cnidarians, seagrass, sponges, and bryozoans. Conservation recommendations include: further characterization and mapping of habitats; assessment of availability and condition of microhabitats in selected areas, and studies on dispersal routes during initial life stages.

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