scholarly journals Body Condition and Fat Score in Local and Passage Populations of the Great Reed Warbler (Acrocephalus arundinaceus) During the Spring Migration in NE Bulgaria

Ring ◽  
2005 ◽  
Vol 27 (2) ◽  
pp. 137-143 ◽  
Author(s):  
Pavel Zehtindjiev
Keyword(s):  
Body Mass ◽  
Body Condition ◽  
Spring Migration ◽  
The Body ◽  
Great Reed Warbler ◽  
Acrocephalus Arundinaceus ◽  
Reed Warbler ◽  
Field Methods ◽  
Field Station ◽  
Fat Score

Body Condition and Fat Score in Local and Passage Populations of the Great Reed Warbler (Acrocephalus arundinaceus) During the Spring Migration in NE Bulgaria The fat level and the body mass of local Great Reed Warblers in the Kalimok Field Station, NE Bulgaria (41°00'N, 26°26'E) were compared with those of passing birds. During the springs of 1998-2004, 591 individuals of this species were mist-netted and handled according to the guidelines in the Manual of Field Methods (ESF project) and to the South-East European Bird Migration Network (SEEN) standards. As local birds we identified 60 individuals caught at least twice in different seasons. The means of the fat score and the body mass calculated for the local birds and for the passing Great Reed Warblers were similar. Also, the time of the local birds arrival and the passage of the species in the region studied coincided. Therefore, we suggest that the southern and northern populations have equal potentials for realization of their migratory state and birds from southern populations could spread in spring to the north, being an important interregional gene flow in Great Reed Warblers.

Brood sex ratios, female harem status and resources for nestling provisioning in the great reed warbler ( Acrocephalus arundinaceus )

2000 ◽  
Vol 47 (5) ◽  
pp. 312-318 ◽  
Author(s):  
H. Westerdahl ◽  
Staffan Bensch ◽  
Bengt Hansson ◽  
Dennis Hasselquist ◽  
Torbjörn von Schantz
Keyword(s):  
Sex Ratios ◽  
Great Reed Warbler ◽  
Acrocephalus Arundinaceus ◽  
Reed Warbler ◽  
Nestling Provisioning

scholarly journals Nutrient Reserves of Lesser Scaup (Aythya Affinis) During Spring Migration in the Mississippi Flyway: A Test of the Spring Condition Hypothesis

The Auk ◽  
2004 ◽  
Vol 121 (3) ◽  
pp. 917-929 ◽  
Author(s):  
Michael J. Anteau ◽  
Alan D. Afton
Keyword(s):  
Reproductive Success ◽  
Body Mass ◽  
Body Condition ◽  
Female Body ◽  
Population Decline ◽  
Spring Migration ◽  
Aythya Affinis ◽  
Lesser Scaup ◽  
Nutrient Reserves ◽  
Mineral Reserves

AbstractThe continental scaup population (Lesser [Aythya affinis] and Greater [A. marila] combined) has declined markedly since 1978. One hypothesis for the population decline states that reproductive success has decreased because female scaup are arriving on breeding areas in poorer body condition than they did historically (i.e. spring condition hypothesis). We tested one aspect of that hypothesis by comparing body mass and nutrient reserves (lipid, protein, and mineral) of Lesser Scaup at four locations (Louisiana, Illinois, Minnesota, and Manitoba) between the 1980s and 2000s. We found that mean body mass and lipid and mineral reserves of females were 80.0, 52.5, and 3.0 g higher, respectively, in the 2000s than in the 1980s in Louisiana; similarly, body mass and lipid and mineral reserves of males were 108.8, 72.5, and 2.5 g higher, respectively. In Illinois, mean body mass and lipid reserves of females were 88.6 and 56.5 g higher, respectively, in the 2000s than in the 1980s; similarly, body mass and lipid and mineral reserves of males were 80.6, 76.0, and 2.7 g higher, respectively. Mean body mass of females were 58.5 and 58.9 g lower in the 2000s than in the 1980s in Minnesota and Manitoba, respectively; mean body mass of males, similarly, were 40.7 g lower in Minnesota. Mean lipid reserves of females in the 2000s were 28.8 and 27.8 g lower than those in the 1980s in Minnesota and Manitoba, respectively. Mean mineral reserves of females in the 2000s were 3.2 g lower than those in the 1980s in Manitoba. Consequently, females arriving to breed in Manitoba in the 2000s had accumulated lipid reserves for 4.1 fewer eggs and mineral reserves for 0.8 fewer eggs than those arriving to breed there in the 1980s. Accordingly, our results are consistent with the spring condition hypothesis and suggest that female body condition has declined, as reflected by decreases in body mass, lipids, and mineral reserves that could cause reductions in reproductive success and ultimately a population decline.

scholarly journals Breeding ecology and behaviour of the Great Reed Warbler, Acrocephalus arundinaceus, in Poyrazlar Lake, Turkey

2014 ◽  
Vol 38 ◽  
pp. 55-60 ◽  
Author(s):  
Ali UZUN ◽  
Zehra AYYILDIZ ◽  
Faruk YILMAZ ◽  
Belgin UZUN ◽  
Mehmet SAĞIROĞLU
Keyword(s):  
Great Reed Warbler ◽  
Breeding Ecology ◽  
Acrocephalus Arundinaceus ◽  
Reed Warbler

scholarly journals Factors influencing the appearance of spider (Araneae) and beetle (Coleoptera) assemblages in nests of great reed warbler Acrocephalus arundinaceus

Biologia ◽  
2014 ◽  
Vol 69 (7) ◽  
Author(s):  
Thomas Mérő ◽  
Maja Janjatović ◽  
Roland Horváth ◽  
Katarina Mrkobrad ◽  
Antun Žuljević
Keyword(s):  
Species Richness ◽  
Great Reed Warbler ◽  
Acrocephalus Arundinaceus ◽  
Reed Warbler ◽  
Factors Influencing ◽  
Significant Difference ◽  
Beetle Assemblages ◽  
Potential Factors ◽  
Spider Abundance ◽  
Species Richness And Abundance

AbstractThe appearance of spider (Araneae) and beetle (Coleoptera) assemblages found in nests of great reed warbler Acrocephalus arundinaceus was studied, firstly to investigate breeding success and the amount of precipitation as potential factors which might affect the abundance and species richness of both groups. In addition, we compared the diversity of spider and beetle assemblages between nests found in different reed habitats, and considered the position of nests (above water or dry ground). In this study we selected five different randomly chosen reed habitats: two mining ponds, two small canals and one large canal. Great Reed Warbler nests were collected either shortly after fledging, or after the clutch had failed. Altogether, 12 species of spider and 19 species of beetle were collected. In both groups there was no significant difference in abundance between successful, lost and cuckoo-parasitized nests; however, there was a significant difference in species richness between the three nest categories in spider assemblages, which was not the case in beetle assemblages. The amount of precipitation did not affect beetle or spider abundance; only the species richness of spiders showed significant growth. Furthermore, we found no significant relationship between vegetation cover and the species richness and abundance of spiders and beetles. The diversity of both groups differed significantly according to reed habitat: beetle assemblages were most diverse by the large canal and spiders at the mining ponds.

Sign in / Sign up

Export Citation Format

Share Document