Foraging Niche Shifts in Multispecies Dabbling Duck (Anas spp.) Feeding Groups: Harmful and Beneficial Interactions between Species

1986 ◽  
Vol 17 (4) ◽  
pp. 333 ◽  
Author(s):  
Hannu Poysa

2002 ◽  
Vol 73 (3) ◽  
pp. 246-252 ◽  
Author(s):  
Piotr G. Jabłoński ◽  
Sang Don Lee


Author(s):  
Nguyen Van Hieu ◽  
Nguyen Van Vinh

An intensive field survey on aquatic insects of Me Linh Station for Biodiversity in Vinhphuc province was conducted in December 2015. Specimens were collected at 8 different sites and aquatic insects were collected both quantitatively by Surber net and qualitatively by hand net, pond net. As a result, a total of 110 aquatic insect species belonging to 98 genera, 49 families and 9 orders were recognized. Among these, the order Ephemeroptera had the highest species number with 26 species, followed by Odonata with 25 species, Trichoptera with 18 species, Coleoptera with 15 species, Hemiptera with 11 species, Diptera with 9 species. Lepidoptera, Plecoptera and Megaloptera had the lowest of species number, represented by 3 species of Lepidoptera, 2 species of Plecoptera and 1 species of Megaloptera. Besides, the quantitative analysis results and the functional feeding groups were provided.



Author(s):  
Boris Lukyanov ◽  
Pavel Lukyanov

The article discusses the solution to the problem of uniting animals on a cattle farm into groups to organize their rational feeding. The task is solved based on the use of management accounting data; the solution of the problem is automated with the help of the CORAL software package





2005 ◽  
Vol 30 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Donald A. Levin
Keyword(s):  


Ecology ◽  
2015 ◽  
Vol 96 (1) ◽  
pp. 80-89 ◽  
Author(s):  
Patrick Grof-Tisza ◽  
Marcel Holyoak ◽  
Edward Antell ◽  
Richard Karban


Author(s):  
Marina Vilenica ◽  
Andreja Brigić ◽  
Michel Sartori ◽  
Zlatko Mihaljević

Research examining mayfly ecology in karst streams and rivers has increased in recent years, though microhabitat preferences remain poorly characterized. We examined mayfly assemblage taxonomy, functional feeding groups and microhabitat preferences in two contrasting lotic Dinaric karst catchments, one pristine and one anthropogenically impacted. At monthly intervals over a one-year period, all major microhabitats (i.e. dominated by boulders, cobbles, sand, silt, mosses, or angiosperms) were sampled at sites spanning springs, upper, middle and lower river reaches, and tufa barriers. In both catchments, mayfly species richness was comparable among microhabitats, while mayfly abundance was highest on mosses and lowest on silt. NMDS ordination did not group assemblages according to microhabitat type, which may reflect the greater influence of physical and chemical water properties. In both catchments and all microhabitats, mayfly assemblages were dominated by grazers/scrapers at upstream sites and by detritivores at downstream sites. Active filter feeders were more abundant in microhabitats with silt substrates and lower current velocities. This study demonstrated that certain mayfly species strongly preferred a specific microhabitat type, reflecting their water current preferences and feeding strategies, while other species shifted between microhabitats, likely in search of food resources and shelter. The results emphasize the importance of habitat heterogeneity in supporting diverse communities in karst rivers.



2021 ◽  
Vol 31 (19) ◽  
pp. R1252-R1266
Author(s):  
Olivia K. Bates ◽  
Cleo Bertelsmeier


Ecology ◽  
2009 ◽  
Vol 90 (5) ◽  
pp. 1207-1216 ◽  
Author(s):  
Lauren A. Harrington ◽  
Andrew L. Harrington ◽  
Nobuyuki Yamaguchi ◽  
Michael D. Thom ◽  
Pablo Ferreras ◽  
...  


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