Prey detection in trawling insectivorous bats: duckweed affects hunting behaviour in Daubenton's bat, Myotis daubentonii

Boonman, Arjan; Boonman, Martijn; Bretschneider, Frank; Grind, W. A. van de

doi:10.1007/s002650050521

Cited by 76 publications

(48 citation statements)

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“…The general consistencies in habitat use that we observed between temperate latitudes and our tropical site at the level of broad habitat types may reflect ecomorphological constraints that predispose migrants to settling in those vegetation types that they can exploit most efficiently (Robinson and Holmes 1982, 1984, Winkler and Leisler 1985, Bairlein 1992, Boonman et al 1998) and, presumably, where they can achieve the highest foraging and refueling rates and probability of survival. Consistent habitat use patterns over such a large geographic region suggest that migrants may select among broad vegetation types based on overall architectural configuration or gross structural features characteristic of preferred vegetation life forms.…”

Section: Geographic Patterns In Stopover Habitat Usementioning

confidence: 99%

“…Physiognomy, the physical structure of the vegetation, provides information regarding the availability of resting/roosting/perch sites and shelter against abiotic conditions and predators, and it influences the efficiency with which animals move through the environment to escape predators and search for, locate, and acquire food resources (Hilden 1965, Robinson and Holmes 1982, 1984, Pounds 1988, Boonman et al 1998, Vanhooydonck et al 2000. Plant species composition also plays a role in shaping animal distributions, as plant species directly and indirectly influence the abundance and type of resources available to individuals (Holmes and Robinson 1981, Rotenberry 1985, Brower and Malcolm 1991, Fleming et al 1993, Barrow et al 2000.…”

Section: Introductionmentioning

confidence: 99%

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Scale-Dependent Habitat Use by Fall Migratory Birds: Vegetation Structure, Floristics, and Geography

Deppe¹,

Rotenberry

2008

Ecological Monographs

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Abstract. Animal habitat selection is a central focus of ecology and conservation biology. Understanding habitat associations in migratory animals is particularly complicated because individuals have variable habitat requirements during the annual cycle, across their geographic range, along migratory routes, and at multiple spatial scales. We studied habitat associations of 16 fall Nearctic-Neotropical migratory land birds at two spatial scales at a stopover site along the northern Yucatan coast to examine scale-dependent habitat use, identify proximate cues shaping birds' distributions, and evaluate similarities in habitat use between our tropical stopover site and temperate sites. We addressed scale-dependent habitat associations in two ways, by (1) quantifying species' distributions among and within broad vegetation types and (2) comparing migrants' associations with architectural gradients between the two spatial scales. We also evaluated the relative importance of vegetation architecture and floristics in explaining migrants' distributions within broad coastal vegetation types.Bird species were nonrandomly distributed among broad-and fine-scale vegetation types, and patterns of habitat use varied between the two scales. Moreover, birds had different preferences for vegetation architecture at the two scales, which may reflect trade-offs between competing demands and/or reduced variation in vegetation at the small scale in our study. These findings illustrate the manner in which spatial scale and range of vegetation variation influence perceptions of animal-habitat associations. Within broad coastal vegetation types birds refined their distributions in relation to architectural and floristic attributes, which provided them with redundant and/or complementary information regarding the distribution of suitable habitat. We suggest that the relative importance of architecture and floristics is likely scale-dependent. Habitat use at our site was similar to that observed at temperate stopover sites for almost all species, indicating that habitat affinities are maintained along the migratory route for these eastern populations despite latitudinal changes in environmental factors. We highlight examples of similar patterns observed in other migratory and nonmigratory animals to illustrate the generality of these patterns beyond en route land birds and our tropical site. We also indicate where we expect to see differences and outline areas of research that merit greater attention in order to advance our understanding of animal habitat selection.

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Section: Geographic Patterns In Stopover Habitat Usementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Scale-Dependent Habitat Use by Fall Migratory Birds: Vegetation Structure, Floristics, and Geography

Deppe¹,

Rotenberry

2008

Ecological Monographs

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“…As an exception, signals of 10-kHz bandwidth or less have been reported for M. dasycneme when foraging far from the shore (Britton et al 1997). Smooth water surfaces reflect little clutter echo when ensonified from an acute angle (Boonman et al 1998) and are thus acoustically comparable to open space, when echo-cluttering river banks and other structures are far from bat and prey. In this situation, narrowband signals are well suited for prey detection .…”

Section: Comparison Within the Genus Myotismentioning

confidence: 99%

Echolocation behavior and signal plasticity in the Neotropical bat Myotis nigricans (Schinz, 1821) (Vespertilionidae): a convergent case with European species of Pipistrellus ?

Siemers

Kalko

Schnitzler

2001

Behavioral Ecology and Sociobiology

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We used both field and flight cage observations to investigate the echolocation and foraging behavior of the seldom studied, small, aerial insectivorous bat Myotis nigricans (Vespertilionidae) in Panama. In contrast to its temperate congeners, M. nigricans foraged extensively in open space and showed an echolocation behavior well adapted to this foraging habitat. It broadcast narrowband echolocation signals of 7 ms duration that enhance the chance of prey detection in open space. Because of rhythmical alternations of signal amplitude from signal to signal in our sound recordings of search signals in open space, we conclude that the bats scanned their environment with head movements, thereby enlarging their search volume. In edge-and-gap situations, and in the flight cage, M. nigricans introduced an initial broadband component to its search calls. In the field and in the flight cage, M. nigricans hawked for prey in aerial catches; gleaning was never observed. M. nigricans demonstrates call structures, such as narrow bandwidth and rather long signals adapted to foraging predominantly in open space. Moreover, call structure is highly plastic, allowing M. nigricans to forage in edge-and-gap situations also. These adaptations in call structure and plasticity have evolved convergently at least twice within the genus Myotis. Finally, M. nigricans echolocation and foraging behavior parallels that of the small, aerial, insectivorous pipistrelle bats (Vespertilionidae), which are not closely related to M. nigricans but forage in similar habitats.

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“…Field studies as well as behavioural experiments have shown that isolated objects floating on smooth water, including debris and prey dummies, can be confused with prey and may be captured by M. daubentonii, M. capaccinii and M. dasycneme (Kalko and Schnitzler, 1989;Britton et al, 1997;Boonman et al, 1998;Britton and Jones, 1999;Siemers et al, 2001b). Therefore it would not be too surprising that all these species catch dead fish from the water surface.…”

Section: Discussionmentioning

confidence: 99%

Evidences of Piscivory by Myotis capaccinii (Bonaparte, 1837) in Southern Iberian Peninsula

Aihartza¹,

Goiti²,

Almenar

et al. 2003

Acta Chiropterologica

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Prey detection in trawling insectivorous bats: duckweed affects hunting behaviour in Daubenton's bat, Myotis daubentonii

Cited by 76 publications

References 31 publications

Scale-Dependent Habitat Use by Fall Migratory Birds: Vegetation Structure, Floristics, and Geography

Scale-Dependent Habitat Use by Fall Migratory Birds: Vegetation Structure, Floristics, and Geography

Echolocation behavior and signal plasticity in the Neotropical bat Myotis nigricans (Schinz, 1821) (Vespertilionidae): a convergent case with European species of Pipistrellus ?

Evidences of Piscivory by Myotis capaccinii (Bonaparte, 1837) in Southern Iberian Peninsula

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