scholarly journals Diet of the Lesser Spotted Eagle (Clanga pomarina) in Amvrakikos Wetlands National Park, Greece

2020 ◽  
Vol 30 ◽  
pp. 68-76
Author(s):  
Haralambos Alivizatos ◽  
Dimitris Papandropoulos ◽  
Stamatis Zogaris
Keyword(s):  
Rattus Norvegicus ◽  
National Park ◽  
Active Nest ◽  
Nest Sites ◽  
Important Prey ◽  
Wide Availability ◽  
Brown Rat ◽  
Southwestern Margin ◽  
Prey Remains ◽  
Water Snakes

The diet of the lesser spotted eagle (Clanga pomarina) was studied in the area that is now the Amvrakikos Wetlands National Park during the Spring periods of 2000 and 2002 by analysis of pellets and prey remains found at two active nest sites, in two different territories. Among 155 prey items collected, in terms of biomass, the diet was 43% reptiles, 30% birds, 24% mammals, 3% amphibians and 1% arthropods. The most important prey taxa were brown rat (Rattus norvegicus) at 19%, water snakes (Natrix spp.) at 11% and moorhen (Gallinula chloropus) at 11% composition. Despite a wide availability of semi-natural and agricultural habitats around the immediate nesting areas, the species seems to have invested in foraging largely on water-dependent animals. The species maintained only one or a maximum of two pairs in the wider region during the study, this being at the southwestern margin of its global breeding range. Conservation insights and recommendations are presented.

scholarly journals Damage to wheat by enclosed populations of Rattus norvegicus

1951 ◽  
Vol 49 (1) ◽  
pp. 22-25 ◽  
Author(s):  
S. A. Barnett
Keyword(s):  
Rattus Norvegicus ◽  
Monetary Loss ◽  
Brown Rat ◽  
The Common

Small enclosed populations of the common brown rat (ten to twenty-six rats), each with access to one ton of sacked wheat for 12–28 weeks, caused a loss in weight of 4·4% of the wheat. 70·4% of the wheat was fouled and had to be cleaned before use. The main monetary loss was due to damage to sacks. Total monetary loss was 18·23% of the original value of the wheat and sacks.

scholarly journals Feeding Ecology of Short-Toed Snake-Eagle (Circaetus gallicus [Gmelin, 1788]) in the Montados of Iberian Peninsula

2020 ◽  
Vol 28 (2) ◽  
pp. 155-179
Author(s):  
Nuno Onofre ◽  
Luís Sampaio
Keyword(s):  
Relative Abundance ◽  
Diet Composition ◽  
Prey Species ◽  
Prey Selection ◽  
Prey Type ◽  
Generalist Predator ◽  
Important Prey ◽  
Psammodromus Algirus ◽  
Circaetus Gallicus ◽  
Water Snakes

The diet of Short-toed Snake-eagle (Circaetus gallicus) during the breeding season in an area dominated by cork and holm oak parkland forests (Montados) was analyzed in this study. As expected, results showed that snakes are the dominant prey in the diet of this eagle, comprising up to 92.5% of the identified items, if potential secondary prey species were excluded. The Montpellier Snake (Malpolon monspessulanus) was the most consumed one (42.2%), followed by the Ladder Snake (Zamenis scalaris) (28.0%), and the water snakes (Natrix spp.) (14.2%). According to the same criteria, lizards (mainly Psammodromus algirus) and mammals represent between 4.8 and 2.2%, respectively. Other animals such as pond turtle and amphibians are irregular prey (<1%), and no bird remains were found at all. Short-toed Snake-eagle is usually referred as a stenophagic predator where snakes are by far its most important prey type, and where within this taxonomic group it behaves as a generalist predator. In this study this premise was then tested comparing the relative abundance of the snake species with their proportion in the diet composition of the eagle in order to know whether or not prey selection exists with regard to the species of snakes in this region. Results point to a quite plausible "preference" for the Ladder Snake and an "avoidance" for the smooth snakes group (Macroprotodon brevis/Coronella girondica), and possibly for the Horseshoe Whip (Hemorrhois hippocrepis). The avoidance to the Horseshoe Whip must be indirect and habitat related, while in relation to the two smooth snakes it may be due in large extend to its small size, in particular.

scholarly journals Global population divergence and admixture of the brown rat ( Rattus norvegicus )

2016 ◽  
Vol 283 (1841) ◽  
pp. 20161762 ◽  
Author(s):  
Emily E. Puckett ◽  
Jane Park ◽  
Matthew Combs ◽  
Michael J. Blum ◽  
Juliet E. Bryant ◽  
...  
Keyword(s):  
Population Structure ◽  
Rattus Norvegicus ◽  
Population Divergence ◽  
Western North America ◽  
Westward Expansion ◽  
Fine Grained ◽  
Worldwide Distribution ◽  
Brown Rat ◽  
Commensal Rodents ◽  
Global Population

Native to China and Mongolia, the brown rat ( Rattus norvegicus ) now enjoys a worldwide distribution. While black rats and the house mouse tracked the regional development of human agricultural settlements, brown rats did not appear in Europe until the 1500s, suggesting their range expansion was a response to relatively recent increases in global trade. We inferred the global phylogeography of brown rats using 32 k SNPs, and detected 13 evolutionary clusters within five expansion routes. One cluster arose following a southward expansion into Southeast Asia. Three additional clusters arose from two independent eastward expansions: one expansion from Russia to the Aleutian Archipelago, and a second to western North America. Westward expansion resulted in the colonization of Europe from which subsequent rapid colonization of Africa, the Americas and Australasia occurred, and multiple evolutionary clusters were detected. An astonishing degree of fine-grained clustering between and within sampling sites underscored the extent to which urban heterogeneity shaped genetic structure of commensal rodents. Surprisingly, few individuals were recent migrants, suggesting that recruitment into established populations is limited. Understanding the global population structure of R. norvegicus offers novel perspectives on the forces driving the spread of zoonotic disease, and aids in development of rat eradication programmes.

scholarly journals Finding ofNeospora caninumin the wild brown rat (Rattus norvegicus)

2004 ◽  
Vol 35 (3) ◽  
pp. 283-290 ◽  
Author(s):  
Chiu-Chen Huang ◽  
Chen-Hsiung Yang ◽  
Yuko Watanabe ◽  
Yung-Kung Liao ◽  
Hong-Kean Ooi
Keyword(s):  
Rattus Norvegicus ◽  
Brown Rat

The molecular identification of Calodium hepaticum in the wild brown rat (Rattus norvegicus) in Poland

2017 ◽  
Vol 62 (4) ◽  
Author(s):  
Katarzyna Buńkowska-Gawlik ◽  
Agnieszka Perec-Matysiak ◽  
Klaudia Burzyńska ◽  
Joanna Hildebrand
Keyword(s):  
Molecular Identification ◽  
Rattus Norvegicus ◽  
Parasitic Nematode ◽  
Mammal Species ◽  
First Finding ◽  
Calodium Hepaticum ◽  
Brown Rat ◽  
In The Wild

Abstractis a parasitic nematode found primarily in rodents but known to infect numerous other mammal species, and causing in humans the hepatic calodiasis. Herein, we present the first finding of

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