Universität zu Köln

Schuchmann, Karl-L., Hegmann, Mona, Schley, Martin, Marques, Marinez I., de Deus, Filipe Ferreira and Weller, Andre-A. (2018). Reproduction and agonistic behavior of black skimmers (Rynchops niger) in a mixed-species colony in the Brazilian Pantanal. Stud. Neotrop. Fauna Environ., 53 (3). S. 219 - 233. ABINGDON: TAYLOR & FRANCIS LTD. ISSN 1744-5140

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Abstract

Black skimmers (Rynchops niger) are colonial waterbirds in Nearctic and Neotropical regions. They often breed in mixed colonies with terns. This work analyzes the reproductive biology of skimmers within a colony including large-billed terns (Phaetusa simplex) and yellow-billed terns (Sternula superciliaris), located along the Cuiaba river in the Brazilian Pantanal, during July-September 2015. We focused on nesting parameters, timing of reproduction, nest survival, predation risk, and agonistic behavior. Skimmer nests (n=31) were not aggregated (R=0.40); mean nest distance was 6.91 +/- 3.39m. Incubation lasted on average 21.6 +/- 1.6days. Nest survival was low (3.2%) due to predation and abandonment, with the green iguana (Iguana iguana) as major predator of eggs. Aggressive behavior included chase and turn-off flights and mainly involved birds of prey (26.5%) followed by jabirus (Jabiru mycteria; 18.2%). The low number of nesting terns (n=3), which can act as protector species, may have negatively impacted the fledging success of R. niger. Reproductive parameters and the complexity of behavioral interactions in such mixed colonies should be further studied in the Pantanal as model cases for ecological/ethological adaptations of colonial breeders under the impact of a seasonally fluctuating water regime.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Schuchmann, Karl-L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hegmann, Mona UNSPECIFIED UNSPECIFIED UNSPECIFIED Schley, Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED Marques, Marinez I. UNSPECIFIED UNSPECIFIED UNSPECIFIED de Deus, Filipe Ferreira UNSPECIFIED UNSPECIFIED UNSPECIFIED Weller, Andre-A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-201324
DOI:	10.1080/01650521.2018.1479951
Journal or Publication Title:	Stud. Neotrop. Fauna Environ.
Volume:	53
Number:	3
Page Range:	S. 219 - 233
Date:	2018
Publisher:	TAYLOR & FRANCIS LTD
Place of Publication:	ABINGDON
ISSN:	1744-5140
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language YELLOW-BILLED TERNS; BREEDING BIOLOGY; NEST PREDATION; COMMON TERNS; SUCCESS; HYPOTHESIS; BIRD; SELECTION; DEFENSE; GULLS Multiple languages Zoology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/20132