| Home | [11–20] << 21 22 23 24 25 26 27 28 29 30 >> [31–40] |
|
| Records | |||||
|---|---|---|---|---|---|
| Author | van Langevelde, F.; Ettema, J.A.; Donners, M.; WallisDeVries, M.F.; Groenendijk, D. | ||||
| Title | Effect of spectral composition of artificial light on the attraction of moths | Type | Journal Article | ||
| Year | 2011 | Publication | Biological Conservation | Abbreviated Journal | Biological Conservation |
| Volume | 144 | Issue | 9 | Pages | 2274-2281 |
| Keywords | insects; moths; artificial light; ecology; population dynamics | ||||
| Abstract | During the last decades, artificial night lighting has increased globally, which largely affected many plant and animal species. So far, current research highlights the importance of artificial light with smaller wavelengths in attracting moths, yet the effect of the spectral composition of artificial light on species richness and abundance of moths has not been studied systematically. Therefore, we tested the hypotheses that (1) higher species richness and higher abundances of moths are attracted to artificial light with smaller wavelengths than to light with larger wavelengths, and (2) this attraction is correlated with morphological characteristics of moths, especially their eye size. We indeed found higher species richness and abundances of moths in traps with lamps that emit light with smaller wavelengths. These lamps attracted moths with on average larger body mass, larger wing dimensions and larger eyes. Cascading effects on biodiversity and ecosystem functioning, e.g. pollination, can be expected when larger moth species are attracted to these lights. Predatory species with a diet of mainly larger moth species and plant species pollinated by larger moth species might then decline. Moreover, our results indicate a size-bias in trapping moths, resulting in an overrepresentation of larger moth species in lamps with small wavelengths. Our study indicates the potential use of lamps with larger wavelengths to effectively reduce the negative effect of light pollution on moth population dynamics and communities where moths play an important role. | ||||
| Address | |||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0006-3207 | ISBN  |
Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | IDA @ john @ | Serial | 114 | ||
| Permanent link to this record | |||||
| Author | Moser, J.C.; Reeve, J.D.; Bento, J.M.S.; Della Lucia, T.M.C.; Cameron, R.S.; Heck, N.M. | ||||
| Title | Eye size and behaviour of day- and night-flying leafcutting ant alates | Type | Journal Article | ||
| Year | 1999 | Publication | Journal of Zoology | Abbreviated Journal | J. Zoology |
| Volume | 264 | Issue | 1 | Pages | 69-75 |
| Keywords | Atta; leaf-cutting ants; nuptial flight; compound eye; ocelli; ommatidia; insects | ||||
| Abstract | The morphology of insect eyes often seems to be shaped by evolution to match their behaviour and lifestyle. Here the relationship between the nuptial flight behaviour of 10 Atta species (Hymenoptera: Formicidae) and the eye size of male and female alates, including the compound eyes, ommatidia facets, and ocelli were examined. These species can be divided into two distinct groups by nuptial flight behaviour: those that initiate the nuptial flight during the day and those that initiate it at night. The most striking difference between day- vs night-flying alates was in ocellus area, which was almost 50% larger in night-flying species. Night-flying species also had significantly larger ommatidia facets than day-flying species. A scaling relationship was also found between compound eye area, facet diameter, and ocellus area vs overall body size. Detailed observations are also presented on the nuptial flight behaviour of a night- vs day-flying species, A. texana and A. sexdens, respectively. The pattern in A. texana is for a single large and precisely timed nuptial flight before dawn, while flights of A. sexdens last for several hours, beginning at midday. Further observations suggest that the timing of the nuptial flight in A. texana is easily disrupted by light pollution. | ||||
| Address | |||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0952-8369 | ISBN |
Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | IDA @ john @ | Serial | 115 | ||
| Permanent link to this record | |||||
| Author | Dacke, M.; Baird, E.; Byrne, M.; Scholtz, C.H.; Warrant, E.J. | ||||
| Title | Dung beetles use the Milky Way for orientation | Type | Journal Article | ||
| Year | 2013 | Publication | Current Biology : CB | Abbreviated Journal | Curr Biol |
| Volume | 23 | Issue | 4 | Pages | 298-300 |
| Keywords | Animals; Beetles/*physiology; *Behavior, Animal; Cues; Feces; *Galaxies; Locomotion; Moon; Motor Activity; Orientation/*physiology; *Stars, Celestial; Vision, Ocular/physiology; Milky Way; insects | ||||
| Abstract | When the moon is absent from the night sky, stars remain as celestial visual cues. Nonetheless, only birds, seals, and humans are known to use stars for orientation. African ball-rolling dung beetles exploit the sun, the moon, and the celestial polarization pattern to move along straight paths, away from the intense competition at the dung pile. Even on clear moonless nights, many beetles still manage to orientate along straight paths. This led us to hypothesize that dung beetles exploit the starry sky for orientation, a feat that has, to our knowledge, never been demonstrated in an insect. Here, we show that dung beetles transport their dung balls along straight paths under a starlit sky but lose this ability under overcast conditions. In a planetarium, the beetles orientate equally well when rolling under a full starlit sky as when only the Milky Way is present. The use of this bidirectional celestial cue for orientation has been proposed for vertebrates, spiders, and insects, but never proven. This finding represents the first convincing demonstration for the use of the starry sky for orientation in insects and provides the first documented use of the Milky Way for orientation in the animal kingdom. | ||||
| Address | Department of Biology, Lund University, 223 62 Lund, Sweden. marie.dacke@biol.lu.se | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0960-9822 | ISBN |
Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:23352694 | Approved | no | ||
| Call Number | IDA @ john @ | Serial | 116 | ||
| Permanent link to this record | |||||
| Author | Narendra, A.; Reid, S.F.; Raderschall, C.A. | ||||
| Title | Navigational efficiency of nocturnal Myrmecia ants suffers at low light levels | Type | Journal Article | ||
| Year | 2013 | Publication | PloS one | Abbreviated Journal | PLoS One |
| Volume | 8 | Issue | 3 | Pages | e58801 |
| Keywords | Adaptation, Biological/*physiology; Animals; Ants/*physiology; Australian Capital Territory; *Cues; Geographic Information Systems; Homing Behavior/*physiology; *Light; Locomotion/*physiology; Orientation/*physiology; insects | ||||
| Abstract | Insects face the challenge of navigating to specific goals in both bright sun-lit and dim-lit environments. Both diurnal and nocturnal insects use quite similar navigation strategies. This is despite the signal-to-noise ratio of the navigational cues being poor at low light conditions. To better understand the evolution of nocturnal life, we investigated the navigational efficiency of a nocturnal ant, Myrmecia pyriformis, at different light levels. Workers of M. pyriformis leave the nest individually in a narrow light-window in the evening twilight to forage on nest-specific Eucalyptus trees. The majority of foragers return to the nest in the morning twilight, while few attempt to return to the nest throughout the night. We found that as light levels dropped, ants paused for longer, walked more slowly, the success in finding the nest reduced and their paths became less straight. We found that in both bright and dark conditions ants relied predominantly on visual landmark information for navigation and that landmark guidance became less reliable at low light conditions. It is perhaps due to the poor navigational efficiency at low light levels that the majority of foragers restrict navigational tasks to the twilight periods, where sufficient navigational information is still available. | ||||
| Address | ARC Centre of Excellence in Vision Science, Research School of Biology, The Australian National University, Canberra, Australian Capital Territory, Australia. ajay.narendra@anu.edu.au | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1932-6203 | ISBN |
Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:23484052; PMCID:PMC3590162 | Approved | no | ||
| Call Number | IDA @ john @ | Serial | 117 | ||
| Permanent link to this record | |||||
| Author | Nwosu, L.C.; Nwosu, L.K. | ||||
| Title | Influence of Type of Electric Bright Light on the Attraction of the African Giant Water Bug, Lethocerus indicus (Hemiptera: Belostomatidae) | Type | Journal Article | ||
| Year | 2012 | Publication | Psyche: A Journal of Entomology | Abbreviated Journal | Psyche: A Journal of Entomology |
| Volume | 2012 | Issue | Pages | 1-4 | |
| Keywords | insects; bugs; African giant water bug; Lethocerus indicus; Hemiptera; Belostomatidae | ||||
| Abstract | This study investigated the influence of type of electric bright light (produced by fluorescent light tube and incandescent light bulb) on the attraction of the African giant water bug, Lethocerus indicus (Hemiptera: Belostomatidae). Four fluorescent light tubes of 15 watts each, producing white-coloured light and four incandescent light bulbs of 60 watts each, producing yellow-coloured light, but both producing the same amount of light, were varied and used for the experiments. Collections of bugs at experimental house were done at night between the hours of 8.30 pm and 12 mid-night on daily basis for a period of four months per experiment in the years 2008 and 2009. Lethocerus indicus whose presence in any environment has certain implications was the predominant belostomatid bug in the area. Use of incandescent light bulbs in 2009 significantly attracted more Lethocerus indicus 103 (74.6%) than use of fluorescent light tubes 35 (25.41%) in 2008 [ 𝑃 < 0 . 0 5 ; 𝑃 ( 𝑍 > 4 . 9 2 ) = 0 . 0 0 0 1 ]. However, bug’s attraction to light source was not found sex dependent [ 𝑃 > 0 . 0 5 ; 𝑃 ( 𝑍 > 0 . 1 8 ) = 0 . 4 2 8 6 and 𝑍 > 0 . 2 8 = 0 . 3 8 9 7 ]. Therefore, this study recommends the use of fluorescent light by households, campgrounds, and other recreational centres that are potentially exposed to the nuisance of the giant water bugs. Otherwise, incandescent light bulbs should be used when it is desired to attract the presence of these aquatic bugs either for food or scientific studies. |
||||
| Address | |||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0033-2615 | ISBN |
Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | IDA @ john @ | Serial | 118 | ||
| Permanent link to this record | |||||