EurekaMag.com logo
+ Site Statistics
References:
48,253,228
Abstracts:
22,798,842
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Distribution and population size of the bittern Botaurus stellaris in lower Saxony results of a state-wide census in 2004 Verbreitung und Bestand der Rohrdrommel Botaurus stellaris in Niedersachsen Ergebnisse einer landesweiten Erfassung 2004


, : Distribution and population size of the bittern Botaurus stellaris in lower Saxony results of a state-wide census in 2004 Verbreitung und Bestand der Rohrdrommel Botaurus stellaris in Niedersachsen Ergebnisse einer landesweiten Erfassung 2004. Vogelkundliche Berichte aus Niedersachsen. Dezember; 381-2: 25-37

A state-wide census of the Bittern was carried out in Lower Saxony in 2004. The results are based on reports of more than 50 ornithologists and own observations. Additionally, data from 2000 to 2003 were analysed. Over the period 2000-2004 there were 15 breeding-populations known. Ten territories in nine populations were recorded in 2004. Because of deficient data for some sites the current population size in Lower Saxony is estimated at appr. 10-15 territories. After a decline of more than 50 % from 1975 to 1999 the population size is presently stable on a very low level. Currently the Bittern is only locally distributed in the regions 'Watten and Marschen', 'Weser-Aller-Flachland' and 'Borden'. Approximately 60% of the population in Lower Saxony are in Special Protection Areas. Reedbeds are most commonly used as breeding habitat, mostly associated with man-made standing waters. In the fluvial plains of the Weser and the Elbe only few observations of breeding Bitterns were made in the past years. Most of the populated reedbeds are full of structures such as pools and shrubs. The majority of the populations are in areas not or rarely visited by the public and free of water-sport. The destruction of natural habitats was the main cause of the decline in populations in the past decades. Possibly the decline in populations in the last century could not be compensated due to lack of suitable breeding habitats. Availability of food and predation may also be factors, but there is too little data on this. Due to the current low population, the negative trend in the records, uncertain reproduction and multiple threats the Bittern in Lower Saxony has an unfavourable conservation status.

(PDF 0-2 workdays service)

Order PDF Full Text

Close
Close

Click here to order any other PDF Full Text


Accession: 038153644

PDF Full Text: Submit


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Other references

Yeh, E.L.; Yeh, Y.S., 1981: Theoretical error in radionuclide ejection fraction study due to photon attenuation. The ejection fractions measured with the radionuclide method are usually lower than those measured with the X-ray contrast method in our hospitals. One of the reasons for this may be that the photon attenuation by the cardiac blood pool and soft t...

Walter, K; Steinhauser, H., 1976: Utilization of remaining grassland by fattening of bulls on farms. Bayerisches landwirtschaftliches Jahrbuch: 3 (1) 3-19

McCabe, C.A., 1967: The role of the dentist in emergency health services. Canadian Journal of Public Health 58(2): 66-68

Hood, J. D., 1915: On some American Aeolothripidae (Thysanoptera). The paper gives an account of the distribution in America of two species of Franklinothrips, and one species of Aeolothrips. F. vespiformis, Crawford, has been taken in Nicaragua, Florida, Texas, Canal Zone (Panama) and Moro Island (Panama). F. te...

Miyake, H.; Maeda, H.; Tashiro, M.; Suzuki, K.; Nagatomo, H.; Aikawa, H.; Ashizawa, A.; Iechika, S.; Moriuchi, A., 1989: CT of adrenal tumors: frequency and clinical significance of low-attenuation lesions. The CT values of adrenal tumors were evaluated in 36 patients to determine the frequency and significance of negative CT values. Twenty-seven patients had adrenocortical adenomas (13 had primary aldosteronism, 12 had Cushing syndrome, and two had...

TABENSKI, Z.; ERMICH, S., 1956: Comparative evaluation of methods of treating myelitis. Polski Przeglad Chirurgiczny 28(11): 1155-1161

Sebesta, J., 1979: Complete or incomplete dominance of resistance of the oat cultivar Delphin as a function of crown rust culture. Delphin, from the cross Bonda X Carstens VII, was found to carry two complementary genes that conferred resistance to 16 cultures of 10 central European races of Puccinia coronata f. sp. avenae. The two genes showed complete dominance of resistanc...

Salmen, L., 2004: Micromechanical understanding of the cell-wall structure. For improving properties of pulp fibres, a better understanding of the relationships between its macroscopic mechanical properties, fibre ultrastructure, and properties of the wood polymers is important. This paper discusses such relations between...

Cliburn J.W.Jr, 1974: Short term toxicities of penta chloro phenol for fingerling catfish. Journal of the Mississippi Academy of Sciences 19: (1975), 1973

De Poli, M.; Clayden, J., 2014: Thionoglycine as a multifunctional spectroscopic reporter of screw-sense preference in helical foldamers. A single thionoglycine (glycine thioamide, -HNCH2C(=S)-) residue inserted into a peptide foldamer provides both a pair of germinal protons for use as a (1)H NMR stereochemical probe and a chromophore giving rise to a well defined Cotton effect in...