| Titre : | Vogelwelt (Die) 119(3-5) - 1998 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Peter H. Becker, Auteur ;
Ute Sommer, Auteur
We studied concentrations of environmental chemicals in Common Tern eggs collected in 1995 at 11 marine and freshwater sites in Central Europe (Warta, Poland: 1990). For all substances studied significant between-site differences were found: hig[...]
Article
Herbert Stark, Auteur
The breeding populations of Common Terns at Lake Constance and on the Swiss lowland lakes have increased in the past 21 years from a total of 389 pairs in 1976 to 513 pairs in 1997. The increase and range expansion were mainly due to the managem[...]
Article
Timm Spretke, Auteur
In the years 1989 and 1990 pellets of Herring Gulls Larus argentatus containing rings of Common Terns were found on the seabird island Kirr in the National Park 'Vorpommersche Boddenlandschaft', Mecklenburg-Vorpommern, Germany. During July 1989,[...]
Article
Jan-Dieter Ludwigs, Auteur
In the breeding season of 1996 intra-specific kleptoparasitism of Common Terns was studied at a colony on Minsener Oldeoog. The marked kleptoparasitism in 1996 was caused by very poor food supply. 15% of the observed feedings of the common Tern [...]
Article
Stefan R. Sudmann, Auteur
The breeding success of two Common Tern colonies in the Lower Rhine area, Germany, declined with increasing nest density during the period 1991 to 1997. On the rafts serving as artificial nesting platforms, the highest nest density was 2.13 clut[...]
Article
Martin Wagener, Auteur
Based on experience gathered during a longterm research project at Wilhelmshaven (Lower Saxony, Germany), methodological recommendations are given for studies of reproductive biology and breeding success of Common Terns. Aspects considered here [...]
Article
Wolfgang Neubauer, Auteur
In eastern Germany Common Tern colonies are found in the Bodden Sea of Vorpommern, in the lakes of Mecklenburg and in the pond area of the Lausitz, but no longer along rivers. Today about 20-25% of the population is breeding at man-made sites (m[...]
Article
Martin Boschert, Auteur
Within the framework of a Species Conservation Programme for Baden-Wurttemberg, the current threats of and potential conservation measures for bird species breeding in gravel pits, particularly Common Sandpiper and Common Tern, are discussed. Th[...]
Article
Eric W. M. Stienen, Auteur ;
Alex Brenninkmeijer, Auteur
The breeding numbers of Common Tern in the Netherlands during the course of the 20th century are reviewed. The current size of the Dutch population is about 12,000-13,000 pairs, down from around 45,000 in the 1930s. Most colonies are situated al[...]
Article
Peter Dienemann, Auteur
Floating artificial islands constructed from variable numbers of triangular elements ('Aquatreat Schwimmkampen', Bestmann GmbH, Wedel) constitute an adequate nesting substrate for breeding Common Terns in areas where undisturbed natural nesting [...]
Article
Peter Suedeck, Auteur ;
Bernd Haelterlein, Auteur ;
Wilfried Knief, Auteur ;
Ulrich Koeppen, Auteur
In 1995, 7557 breeding pairs of Common Tern and 7329 pairs of Arctic Tern were counted along the German coasts. This is over 25 % less than in a similar survey 1939 (SCHULZ, 1947). The population development of each species is described separate[...]
Article
Dietrich Frank, Auteur
In 1994, a gas-pipeline was built through the National Park 'Niedersachsisches Wattenmeer' between Baltrum and Langeoog on the German North Sea coast. To assess the impact on the Wadden Sea ecosystem, an ecological monitoring programme was set u[...]
Article
Peter H. Becker, Auteur
From 1981 to 1996 the reproductive success of Common Terns was studied at 3-5 colony sites at the Jade in the German Wadden Sea (Lower Saxony). The total population as well as the biggest colony on the island Minsener Oldeoog (MO) showed no tren[...]
Article
Helmut Wendeln, Auteur ;
Peter H. Becker, Auteur
Since 1992 we perform a long-term population study of Common Terns breeding in the harbor area of Wilhelmshaven, German Wadden Sea coast. We use subcutaneously injected passive transponders for life-long individual identification. All fledged ch[...]
Article
Martin Boschert, Auteur ;
Christian Dronneau, Auteur
When the river Rhine was still in a wild state, Common Terns were common and widespread. The population decreased since the beginning of the regulation and canalization by Tulla in 1817. In the northern Upper Rhine valley Common Terns had probab[...]
Article
Heribert Zintl, Auteur
During the 19th century the Common Tern population in Bavaria consisted of an estimated 1000 pairs. Due to river regulation it decreased to a minimum of 37 pairs in 1980. From 1984 onwards the population started to increase again (Fig. 4) and re[...]
Article
Peter H. Becker, Auteur ;
Stefan R. Sudmann, Auteur
The results of a symposium on Common Term conservation held in Wilhelmshaven, Germany, in October 1997 are summarized. In 1996 about 8,500 pairs of Common Tern bred in Germany. The inland population has more than doubled since 1980. However, pop[...]
Article
Stefan R. Sudmann, Auteur
A new project of monitoring Common Terns in inland colonies is designed. Data relevant to the following questions should be collected: numbers of breeding pairs, nest density and breeding success in all colonies and in some colonies also data on[...]
Article
Udo Siebolts, Auteur
In the breeding season of 1997 I studied the alarm flights and the aggressive behavior towards human intruders in three colonies of Common Terns on the island of Minsener Oldeoog in the German Wadden Sea. The alarm flight distance of individual [...]
Article
Stefan Raab, Auteur
The original habitats of the Common Tern at the southern tributaries of the river Danube were the plain meanders. The straightened rivers lost their plain meanders and were transformed into channels. Furthermore, by a variety of river management[...]
Article
Joachim Loose, Auteur
From 1989-1997 a stable colony of Common Terns Sterna hirundo developed on rafts at a freshwater lake in Mecklenburg-Vorpommern. Up to 28 pairs were breeding on the small rafts of lesser than five m2 (5.18 nests/m2). A mean clutch size of 2,82 e[...]
