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Outstations as stable meeting points for workers from different nests in a polydomous nest system of Formica exsecta Nyl. (Hymenoptera: Formicidae)

100%

Csata E., Marko B., Eros K., Gal C., Szasz-Len A.-M., Czekes Z.

Polish Journal of Ecology

2012

tom 60

nr 1

The mound building narrowheaded ant Formica exsecta builds guarding outstations, usually at the root of the aphid-housing plants. Colonies of this species can develop into huge polydomous systems, so-called supercolonies, made up of several hundred of related nests and outstations. Although the existence of these guarding structures is well-known, still there is little information available concerning their characteristics. In the frame of this study we analyze the characteristics and the integrative role of outstations within a large polydomous system of F. exsecta as a function of ant nest density. The study was carried out in Transylvania, Romania. Two areas with different ant nest densities were selected for the purpose of this study: high (HD) and low density (LD) sites. Parallel to the density of ant nests, the density of outstations was also higher at the HD site, while the size of outstations and the number of ants residing in them did not differ significantly between the two sites. Outstations were usually maintained by a single ant nest at the LD site, thus the common exploitation of food resources was less frequent, whereas at the HD site outstations were used by more ant nests. This article provides the first evidence to shared use of outstations in F. exsecta. In the view of our results outstations, in addition to guarding aphid colonies, also function as permanent meeting points for workers from different nests, which contribute essentially to the integration of nests within a polydomous system.

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Birds and bats using buildings as a place of breeding or shelter

51%

Janus K., Lesinski G.

Annals of Warsaw University of Life Sciences - SGGW. Animal Science

2018

tom 57[1]

Birds and bats using buildings as a place of breeding or shelter.The presence of birds and bats was analysed in buildings intended for thermal refurbishment. Study material was collected in the years 2012-2016 in 336 buildings from 11 voivodships. For detailed analyses concerning birds, data from three voivodships were selected: kujawsko-pomorskie, łódzkie and mazowieckie. To determine differences in the location of bat roosts, buildings from all voivodships were compared. Bird nesting places and daytime bat roosts were divided into 22 locations. Regional differences in the occupation of buildings were analysed. For comparison, the analysed buildings were divided into churches, tenements, public buildings, and residential blocks. Buildings used by birds were also compared with respect to the degree of urbanization of their surroundings. Species-specific differences in their preference for occupying buildings of different types were analysed in birds. Birds were found in 78.9% of buildings and bats – in 8.9% of buildings. 2,250 bird nests in 265 buildings and over 1,000 bats in 30 buildings were inventoried. The bird species most often found in buildings were: the swift Apus apus (40.5%), house sparrow Passer domesticus (31.7%) and jackdaw Corvus monedula (9.9%). Bat species found in buildings included: the common noctule Nyctalus noctula, serotine bat Eptesicus serotinus, lesser horseshoe bat Rhinolophus hipposideros, pipistrelles Pipistrellus and long-eared bats Plecotus. The house sparrow most often inhabited buildings in kujawsko-pomorskie voivodship and the swift most often inhabited buildings in mazowieckie and łódzkie voivodships. Birds in kujawsko-pomorskie voivodship most often built their nests under roofs and birds from mazowieckie and łódzkie voivodships in flat roof spaces. A total of 31 bat roosts were located in 30 buildings in five different locations. Bats most often occupied flat roof spaces and attics and least often occupied crevices behind the gutter.

Ograniczanie wyników

1 Annals of Warsaw University of Life Sciences - SGGW. Animal Science

1 Polish Journal of Ecology

1 Csata E.

1 Czekes Z.

1 Eros K.

1 Gal C.

1 Janus K.

1 Lesinski G.

1 Marko B.

1 Szasz-Len A.-M.

1 2018

1 2012

Wyniki wyszukiwania

Outstations as stable meeting points for workers from different nests in a polydomous nest system of Formica exsecta Nyl. (Hymenoptera: Formicidae)

Birds and bats using buildings as a place of breeding or shelter