Liczebność ptaków wodnych na Zatoce Gdańskiej w okresie maj 2019–kwiecień 2020

• Autorzy: Meissner W. , Stepniewska K. , Bzoma S. , Kosmicki A.

Warianty tytułu

EN

Numbers of waterbirds on the Bay of Gdańsk between May 2019 and April 2020

• Języki publikacji: PL

Abstrakty

EN

In summer the most abundant species were: the Great Cormorant Phalacrocorax carbo, European Herring Hull Larus argentatus sensu lato and Black-headed Gull Chroicocephalus ridibundus. Numbers of Black-headed Gulls were gradually growing in the following months, which was associated with desertion of breeding colonies and the beginning of migration. In September many Eurasian Wigeons Mareca penelope arrived to the bay, and they concentrated mainly in the Reda mouth, where a total of 4369 individuals were counted. A very mild winter resulted in relatively high numbers of Gadwalls M. strepera and Common Teals Anas crecca, that rarely winter at the Bay of Gdańsk. In January the bay hosted many Coots Fulica atra. Their numbers in January 1985–2000 were positively correlated with the mean ambient temperatures of the month. The species is sensitive to low temperatures, but its numbers in the western part of the Bay of Gdańsk increased 2–3 years after a cold winter (not the following winter). The number of gulls at the communal garbage dumps was very low compared to the data from the beginning of 21th century, which may result from the shrinkage of the dump areas and mild winters. The key factor is probably chasing away gulls by falconers, which started in 2004.

Słowa kluczowe

PL

ptaki wodne; ptaki; gatunki zwierzat; populacje; liczebnosc; rozmieszczenie; obserwacje; wystepowanie; Zatoka Gdanska

• Wydawca: -
• Czasopismo: Ornis Polonica
• Rocznik: 2020
• Tom: 61
• Numer: 3
• Opis fizyczny: s.245-252,tab.,wykr.,bibliogr.

Twórcy

autor

Meissner W.

• Pracownia Ornitologii Katedra Ekologii i Zoologii Kręgowców UG Wita Stwosza 59, 80-308 Gdańsk

autor

Stepniewska K.

• Pracownia Ornitologii Katedra Ekologii i Zoologii Kręgowców UG Wita Stwosza 59, 80-308 Gdańsk

autor

Bzoma S.

• Grupa Badawcza Ptaków Wodnych KULING Świerkowa 34/7, 81-526 Gdynia

autor

Kosmicki A.

• Grupa Badawcza Ptaków Wodnych KULING Kruczkowskiego 15 C/9, 80-288 Gdańsk