| الوصف: |
I 2001 blev antallet af skarvreder i Danmark opgjort til 39.292. Antallet af reder var 8% lavere end i 2000, men på samme niveau som i 1998 og 1999. Antallet lå endvidere på niveau med det gennemsnitlige antal reder i perioden 1993-2001. I forhold til 2000 er der især sket tilbagegang i sydøstlige Danmark og det meste af Jylland, især Vestjylland. Antallet af reder på Sydfyn og nordlige Sjælland var relativt stabilt i 2001 sammenlignet med 2000. Antallet af kolonier var også på samme niveau som i 1999. Dette er med til at underbygge indtrykket af at antallet af reder har stabiliseret sig i de seneste år, og at udviklingen i 2000 synes at have være baseret på særlige gunstige forhold for skarven. Flere af de kolonier der forsvandt i 2001 var nyetablerede i 2000. 2001 var første år med tilbagegang i Nord- og Vestjylland. Hermed er antallet af optalte reder stagneret over hele Danmark. Det kan påvises at der regionalt er sket stagnation siden 1992, først på Sydfyn, i 1993 i Storstrømmen, derefter i 1995 i den centrale del af Danmark. Antallet af skarvreder i nordlige Sjælland stagnerede først i 2000 og i 2001 i Nord- og Vestjylland. Udvikling i kolonierne i hvor individerne søger føde i den centrale del af Kattegat, tyder på at der endnu er føderessourcer dér. I 15 kolonier blev skarvreder reguleret. I alt 3.275 reder blev reguleret i 2001, svarende til 8% af det samlede antal skarvreder. Det er det højeste antal nogensinde, både hvad angår antallet af kolonier og reder. 2.407 reder blev behandlet med paraffinolie, mens de øvrige reder er reguleret ved skræmmeskud, nedtagning af reder, ødelæggelse af æg/reder, gaskanon/hyler og anden form for forstyrrelser. * In 2001, the number of cormorant Phalacrocorax carbo nests in Denmark was estimated at 39,292. The number of nests registered in 2001 decreased by 8% in relation to 2000 and has reached the 1999 and 1998 levels. The number is furthermore on the same level as the average number of nests counted in the period 1993-2001. In relation to 2000 the decrease has especially occurred in southeastern Denmark and most of Jutland, especially Western Jutland. The number of nests in the southern part of Funen and the northern part of Zealand was relatively stable in 2001. The number of colonies like the number of nests decreased to the same level as in 1999. This correlates with the impression that the number of nests has stabilised over the past years and that the development in 2000 seems to have been based on especially good conditions for the cor-mo-rants. Many of the colonies that disappeared in 2001 were the same as those that were new in 2000. For the first time the number of cormorant nests decreased in Western and Northern Jutland in 2001. Now the number of counted nests has stagnated in all parts of Denmark. Regionally there has been stagnation since 1992, first on Southern Funen and then in the southeastern part of Denmark (Storstrømmen) in 1993. In 1995 stagnation was observed in central parts of Denmark. The number of cormorant nests in the northern part of Zealand stagnated in 2000, and in 2001 stagnation was observed in the western and northern parts of Denmark. Despite the stagnation there might be local differences in the future. The development of the colonies related to the central parts of Kattegat shows that there are probably enough resources in this area for a further expansion in the affected colonies. The development in the number of counted nests in the last 3-4 years confirms the assumption that the cormorant has now accumulated a reserve of sexually mature, non-breeding birds capable of quickly establishing new colonies or ex-pand-ing old ones if nesting and forage resources are available. Such conditions appear to have been prevailing in 2000 and not in 2001. In 15 colonies, the nests of the cormorant were regulated. A total of 3,275 nests or 8% of the total number of counted nests were regulated in 2001. This is the highest number of both nests and colonies ever regulated in Denmark. 2,407 nests were regulated by the use of paraffin oil, while shooting, removing nests, and destroying eggs and/or nests or disturbance regulated over 900 nests. |
