Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Joachim Ostheim"'
Publikováno v:
Journal of Experimental Biology
The visual control of pecking by pigeons (Columba livia) has latterly been thought to be restricted to the fixation stops interrupting their downward head movements because these stops prevent interference by motion blur. Pigeons were also assumed to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ac5778006bc639eda5623b93cc3071d
https://hdl.handle.net/21.11116/0000-0006-DFD1-321.11116/0000-0006-4318-4
https://hdl.handle.net/21.11116/0000-0006-DFD1-321.11116/0000-0006-4318-4
Autor:
Joachim Ostheim
Publikováno v:
European Journal of Morphology. 35:269-276
During the final down-thrust of a pigeon's head, the eyes are closed gradually, a response that was thought to block visual input. This phase of pecking was therefore assumed to be under feed-forward control exclusively. Analysis of high resolution v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::450c4fe2d873e0a8fc2d54b129435a65
https://doi.org/10.1076/ejom.35.4.269.13082
https://doi.org/10.1076/ejom.35.4.269.13082
Autor:
Joachim Ostheim
Publikováno v:
Netherlands Journal of Zoology. 47:457-475
The visual control of pecking is believed to be restricted to the fixation pauses which precede the final down-thrust of the head. The latter movement is assumed to be performed under feed-forward control only, a hypothesis that is mainly supported b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::374409ced8421271b2e2e978697d4c66
https://doi.org/10.1163/156854297x00120
https://doi.org/10.1163/156854297x00120
Publikováno v:
The Journal of experimental biology. 207(Pt 17)
SUMMARY Captive Texas horned lizards were high-speed videotaped while feeding on ants in order to study the role of vision in facilitating tongue-protrusion capture of prey. Analysis of tongue movements revealed that prey snapping in these lizards is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::642df503d1f48811fa0695d8e07bb90c
https://pubmed.ncbi.nlm.nih.gov/15277561
https://pubmed.ncbi.nlm.nih.gov/15277561
Autor:
Joachim Ostheim
Publikováno v:
Physiologybehavior. 51(2)
The adaptive responses to increasing food scarcity were investigated in a closed economy behavioral procedure. Food-limited conditions were simulated by an increasing fixed ratio (FR) schedule, i.e., an increasing number of keypecks was required to g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9da1911e1b7494881e7ba160d2737a18
https://pubmed.ncbi.nlm.nih.gov/1557447
https://pubmed.ncbi.nlm.nih.gov/1557447
Autor:
Werner Rautenberg, Joachim Ostheim
Publikováno v:
Physiology of Cold Adaptation in Birds ISBN: 9781475700336
When faced with periods of food scarcity, an endothermic organism can use a variety of mechanisms for achieving a positive energy balance, or at least a steady state, in which energy intake compensates metabolic costs of survival. In general these me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15e614e81226de456ad0ba94cac350a2
https://doi.org/10.1007/978-1-4757-0031-2_29
https://doi.org/10.1007/978-1-4757-0031-2_29