Responses to distress calls by black-headed gulls, Larus ridibundus: the role of non-degraded features

1990 ◽  
Vol 39 (3) ◽  
pp. 503-511 ◽  
Author(s):  
Jean-Claude Brémond ◽  
Thierry Aubin
2021 ◽  
Vol 175 ◽  
pp. 111-121
Author(s):  
Yingtong Wu ◽  
Anna L. Petrosky ◽  
Nicolas A. Hazzi ◽  
Rebecca Lynn Woodward ◽  
Luis Sandoval

2022 ◽  
pp. e90202113
Author(s):  
Jamile Bubadué ◽  
Lucas Carneiro ◽  
Breno Mellado ◽  
Luana Mayer ◽  
Ricardo Lyra ◽  
...  

The Mammal Collection of UENF was created in 2013 to document the biodiversity of northern Rio de Janeiro, and house voucher specimens collected during field research held by professors from the university and collaborating institutions. The collection currently holds 440 physical vouchers, mostly bats, and includes noteworthy records, such as the first Promops nasutus reported for the state of Rio de Janeiro. To these physical vouchers, we recently added a digital bioacoustics collection (343 files of bat distress calls) and a camera-trap multimedia collection (2683 videos or photographs of small to large-sized mammals). In this paper, we provide an overview of these holdings, and highlight and discuss the importance of regional scientific collections, along with the fundamental role of publishing their records in online databases in order to increase their visibility and scientific use. Finally, we discuss the importance of natural history collections to society, emphasizing that improving the awareness of the general public on the role of these collections to scientific development will be crucial for their conservation over the next centuries.


2016 ◽  
Vol 15 (4) ◽  
pp. 476-492
Author(s):  
С. С. Золотарев ◽  
◽  
С. П. Харитонов ◽  
Ю. И. Красильников ◽  
Б. М. Звонов ◽  
...  
Keyword(s):  

Behaviour ◽  
1992 ◽  
Vol 120 (3-4) ◽  
pp. 151-163 ◽  
Author(s):  
T. Aubin ◽  
J.C. Bremond

AbstractTo examine the ethological role of signal composition in the distress calls of starlings (Sturnus vulgaris), we conducted a series of playback experiments in the field. Earlier researches revealed that frequency modulations are important features of distress calls for triggering the responses of starlings. Another feature, the harmonic structure, was thought to play a role in the coding/decoding process of the call. The aim of this work was to investigate the role of this structure. Four points emerge from these experiments: 1) Ethological message is effectively encoded in the harmonic structure. 2) Wide-band frequency spectra are preferred to narrow-band spectra. 3) Starlings examine the width of the spectrum but not the interval between frequency bands. 4) Spectra with a high intensity upper part produce a stronger response than other types of spectra. Such a coding/decoding process is discussed regarding transmission of information at long range, the ability to appreciate distance, to locate the caller and the possibility of grading the information.


1988 ◽  
Vol 15 (3) ◽  
pp. 221-224 ◽  
Author(s):  
Cristina Fossi ◽  
Claudio Leonzio ◽  
Silvano Focardi ◽  
Aristeo Renzoni

This study was conducted to explore the role of the mixed-function oxidase (MFO) detoxication system in the ‘adaptation’ process of gulls to polluted environments. In two different populations of Black-headed Gull (Larus ridibundus), feeding in one case in a lagoon and in the other on an inland rubbish-dump, MFO hepatic activities (aldrin epoxidase, 7-ethoxyresorufin o-deethylase, NADPH-cytochrome c reductase, NADH-cytochrome c reductase, and NADH-ferrycianide reductase) and chlorinated hydrocarbon residues were determined. All the enzymatic activities detected, and the PCB residues, were higher in the Gulls feeding on the inland dump than in the gulls feeding in the lagoon.The results obtained suggest that the development of a strong detoxication system constitutes an important ‘survival mechanism’ for these birds when feeding customarily in polluted environments.


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