NDLI: Variation in parental care in the spectacled tyrant Hymenops perspicillatus is associated with increased nest predation in grassland fragments

Content Provider	Springer Nature Link
Author	Pretelli, Matías G. Isacch, Juan P. Cardoni, Daniel A.
Copyright Year	2015
Abstract	Predation risk on birds is often an important source of natural selection that shapes parental care and may promote behavioral changes. Parents can often estimate certain risks and adjust their behavior to reduce the likelihood of nest predation. The fragmentation of habitats is one of the main consequences of loss of habitats, and in general, for birds breeding in smaller patches, their daily nest-survival rate is lower due to increased nest predation. Since nest survival is an estimate of predation risk in the environment, we evaluated the daily survival rate (DSR) for nests of spectacled tyrants (Hymenops perspicillatus) and parental care behavior on fragmented and unfragmented grasslands. We conducted nest searching and monitoring during the 2012–2013 breeding season in small patches and in a continuous patch of grassland. In addition, parental activity was recorded using video monitoring. We found a lower DSR for the spectacled tyrant in fragmented grasslands, associated with increased nest predation risk; females showed a variation in parental care. This variation was evidenced by larger incubation bouts and lower visitation rate during the incubation period, and by a lower food delivery rate to nestlings, compensated by larger prey sizes. The results show that fragmentation not only reduces the fitness of individuals and impacts adversely on population, but individuals are also subjected to a strong selection pressure, and their reproductive success may depend to some extent on the ability of parents to estimate at least certain predation risk and adjust their behavior in this regard. Unterschiede in der Brutpflege beim Brillentyrann steht in Verbindung mit einer erhöhten Nest-Prädationsrate in fragmentiertem Grasland Das Prädationsrisiko ist für Vögel eine wichtige Quelle natürlicher Selektion, die die Brutpflege formt und zu Verhaltensänderungen führen könnte. Oft können Eltern bestimmte Risiken abschätzen und ihr Verhalten anpassen, um die Wahrscheinlichkeit für Nest-Prädation zu reduzieren. Die Fragmentierung von Habitaten ist die wesentliche Folge von Habitatverlust, und generell ist für Vögel, die in kleineren Habitatflecken brüten, die auf den Tag umgerechnete Überlebensrate eines Nests (daily survival rate, DSR) aufgrund von höherer Nest-Prädation geringer. Weil Nest-Überlebensraten ein Schätzer für das Prädationsrisiko in der Umgebung sind, erhoben wir die DSR für Nester des Brillentyrann (Hymenops perspicillatus) zusammen mit Brutpflegeverhalten in fragmentiertem und unfragmentiertem Grasland. Wir führten Nestersuche und Nestmonitoring in der Brutsaison 2012–2013 für kleine Flecken und in einem zusammenhängenden Stück Grasland durch. Außerdem wurde das Brutpflegeverhalten mit Videomonitoring aufgenommen. Wir fanden, dass der Brillentyrann in fragmentiertem Grasland eine geringere DSR hatte, und die Weibchen zeigten in Verbindung mit dem erhöhten Prädationsrisiko eine Änderung im Brutpflegeverhalten. Diese Änderung zeigte sich in längeren Bebrütungsphasen und verringerter Anzahl dieser Phasen, und in selteneren Fütterungen, die aber durch größere verfütterte Beute kompensiert wurden. Die Ergebnisse zeigen, dass Habitat-Fragmentierung nicht nur die individuelle Fitness herabsetzt und sich negativ auf die Population auswirkt, sondern auch einen Selektionsdruck auf Individuen darstellt, indem ihr Reproduktionserfolg teilweise davon abhängen könnte, wie gut die Elterntiere zumindest bestimmte Prädationsrisiken abschätzen und mit Verhaltensänderungen darauf reagieren können.
Starting Page	451
Ending Page	460
Page Count	10
File Format	PDF
ISSN	21937192
Journal	Journal für Ornithologie
Volume Number	157
Issue Number	2
e-ISSN	21937206
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-11-03
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Nest predation risk Behavioral changes Grassland bird Nestling feeding rate South America Tyrannidae Zoology Ecology Fish & Wildlife Biology & Management
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Variation in parental care in the spectacled tyrant Hymenops perspicillatus is associated with increased nest predation in grassland fragments

Parental care and external sexual characters in the Warbling Doradito (Pseudocolopteryx flaviventris)

Nest predation of grassland bird species increases with parental activity at the nest

Compensation for predator-induced reduction in nestling feeding rate in the Great Spotted Woodpecker

Male and female Blackbirds (Turdus merula) respond similarly to the risk of nest predation

Blocking of ultraviolet reflectance on bird eggs reduces nest predation by aerial predators

Plasticity of parental care under the risk of predation: how much should parents reduce care?

Effects of nest predation risk on female incubation behavior and offspring growth in great tits

Nest predation research: recent findings and future perspectives

Variation in parental care in the spectacled tyrant Hymenops perspicillatus is associated with increased nest predation in grassland fragments

Similar Documents

Variation in parental care in the spectacled tyrant Hymenops perspicillatus is associated with increased nest predation in grassland fragments

Parental care and external sexual characters in the Warbling Doradito (Pseudocolopteryx flaviventris)

Nest predation of grassland bird species increases with parental activity at the nest

Compensation for predator-induced reduction in nestling feeding rate in the Great Spotted Woodpecker

Male and female Blackbirds (Turdus merula) respond similarly to the risk of nest predation

Blocking of ultraviolet reflectance on bird eggs reduces nest predation by aerial predators

Plasticity of parental care under the risk of predation: how much should parents reduce care?

Effects of nest predation risk on female incubation behavior and offspring growth in great tits

Nest predation research: recent findings and future perspectives

Variation in parental care in the spectacled tyrant Hymenops perspicillatus is associated with increased nest predation in grassland fragments