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Orientational Responses To Different Light Stimuli By Adult and Young Sedge Warbler (Acrocephalus Schoenobaenus) During Autumn Migration: a Funnel Technique Study

Orientational Responses To Different Light Stimuli By Adult and Young Sedge Warbler (Acrocephalus... ORIENTATIONAL RESPONSES TO DIFFERENT LIGHT STIMULI BY ADULT AND YOUNG SEDGE WARBLER (ACROCEPHALUS SCHOENOBAENUS) DURING AUTUMN MIGRATION: A FUNNEL TECHNIQUE STUDY by NATALE E. BALDACCINI and ELENA MARIA BEZZI1) (Istituto di Zoologia, Università di Parma, Via Università 12-43100 Parma, Italy) (With 2 Figures) (Acc. 26-III-1989) 1. Introduction ' Migratory birds, when choosing and maintaining a route, do not make use of only one orientational cue, but instead rely upon various reference systems organised in a hierarchical order (ABLE, 1980; WILTSCHKO et al., 1980; WILTSCHKO & WILTSCHKO, 1985). However, it seems improbable that the young migrant initially has the entire set of orientational cues at its disposition (EMLEN, 1969; WILTSCHKO 8L al., 1980; WILTSCHKO & WILTSCHKO, 1975). Such a complex integration of several reference systems certainly necessitates a process of biological maturation, or learn- ing, during the first migratory cycle, as has been demonstrated by PERDECK'S pioneer work (1958) on starlings. Moreover, in long-distance migrants the hierarchy of orientational cues should be particularly plastic, thereby enabling ecological adaptation to the distance and speed of migration (WILTSCHKO & WILTSCHKO, 1975). Hence we can expect dif- ferences in orientational behaviour between adults and yearlings at their first migration, in response to http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behaviour Brill

Orientational Responses To Different Light Stimuli By Adult and Young Sedge Warbler (Acrocephalus Schoenobaenus) During Autumn Migration: a Funnel Technique Study

Behaviour , Volume 110 (1-4): 115 – Jan 1, 1989

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Publisher
Brill
Copyright
© 1989 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0005-7959
eISSN
1568-539X
DOI
10.1163/156853989X00420
Publisher site
See Article on Publisher Site

Abstract

ORIENTATIONAL RESPONSES TO DIFFERENT LIGHT STIMULI BY ADULT AND YOUNG SEDGE WARBLER (ACROCEPHALUS SCHOENOBAENUS) DURING AUTUMN MIGRATION: A FUNNEL TECHNIQUE STUDY by NATALE E. BALDACCINI and ELENA MARIA BEZZI1) (Istituto di Zoologia, Università di Parma, Via Università 12-43100 Parma, Italy) (With 2 Figures) (Acc. 26-III-1989) 1. Introduction ' Migratory birds, when choosing and maintaining a route, do not make use of only one orientational cue, but instead rely upon various reference systems organised in a hierarchical order (ABLE, 1980; WILTSCHKO et al., 1980; WILTSCHKO & WILTSCHKO, 1985). However, it seems improbable that the young migrant initially has the entire set of orientational cues at its disposition (EMLEN, 1969; WILTSCHKO 8L al., 1980; WILTSCHKO & WILTSCHKO, 1975). Such a complex integration of several reference systems certainly necessitates a process of biological maturation, or learn- ing, during the first migratory cycle, as has been demonstrated by PERDECK'S pioneer work (1958) on starlings. Moreover, in long-distance migrants the hierarchy of orientational cues should be particularly plastic, thereby enabling ecological adaptation to the distance and speed of migration (WILTSCHKO & WILTSCHKO, 1975). Hence we can expect dif- ferences in orientational behaviour between adults and yearlings at their first migration, in response to

Journal

BehaviourBrill

Published: Jan 1, 1989

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