| 1. |
- Becher, Paul, et al.
(författare)
-
Yeast, not fruit volatiles mediate Drosophila melanogaster attraction, oviposition and development
- 2012
-
Ingår i: Functional Ecology. - : Wiley. - 1365-2435 .- 0269-8463. ; 26:4, s. 822-828
-
Tidskriftsartikel (refereegranskat)abstract
- 1.In nature, the fruit fly Drosophila melanogaster is attracted to fermenting fruit. Micro-organisms like Saccharomyces yeasts growing on fruit occupy a commonly overlooked trophic level between fruit and insects. Although the dietary quality of yeast is well established for D.melanogaster, the individual contribution of fruit and yeast on host finding and reproductive success has not been established. 2.Here, we show that baker's yeast Saccharomyces cerevisiae on its own is sufficient for fruit fly attraction, oviposition and larval development. In contrast, attraction and oviposition were significantly lower if non-fermented grape juice or growth media were used, and yeast-free grapes did not support larval development either. 3.Despite a strong preference for fermented substrates, moderate attraction to and oviposition on unfermented fruit might be adaptive in view of the fly's capacity to vector yeast. 4.Signals emitted by fruit were only of secondary importance because fermenting yeast without fruit induced the same fly behaviour as yeast fermenting on fruit. We identified a synthetic mimic of yeast odour, comprising ethanol, acetic acid, acetoin, 2-phenyl ethanol and 3-methyl-1-butanol, which was as attractive for the fly as fermenting grape juice or fermenting yeast minimal medium. 5.Yeast odours represent the critical signal to establish the flyfruityeast relationship. The traditional plantherbivore niche concept needs to be updated, to accommodate for the role of micro-organisms in insectplant interactions.
|
|
| 2. |
- Elmberg, Johan, 1960-, et al.
(författare)
-
Snokens barnkammare försvinner
- 2013
-
Ingår i: Fauna och flora. - 0014-8903. ; 108:1, s. 10-16
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
|
|
| 3. |
- Elmberg, Johan, et al.
(författare)
-
Snokens barnkammare försvinner
- 2013
-
Ingår i: Fauna och flora populär tidskrift för biologi. - 0014-8903. ; 108:1, s. 10-16
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
|
|
| 4. |
- Hagman, Mattias
(författare)
-
Control methods for unwanted anurans
- 2011
-
Bok (refereegranskat)abstract
- Anurans (frogs and toads) worldwide are threatened by habitat loss, emerging infectious diseases, overexploitation, pollution, climatic change and introduction of exotic species. As a result of human activities, some anurans have actually increased their distribution and are now doing extremely well in places far outside of their natural range. But these anurans are often unwanted in the introduced range because they may disturb recipient ecosystems and pose a threat to indigenous fauna, including native amphibians. This book reviews anuran biology and discusses some life history traits that may be suitable for targeted control measures.
|
|
| 5. |
- Hagman, Mattias, et al.
(författare)
-
Grass snakes (Natrix natrix) in Sweden decline together with their anthropogenic nesting-environments
- 2012
-
Ingår i: Herpetological Journal. - : British Herpetological Society. - 0268-0130. ; 22:3, s. 199-202
-
Tidskriftsartikel (refereegranskat)abstract
- In this paper we show that the number of grass snake (Natrix natrix L.) specimens deposited in Swedish museum collections has declined in the last eighty years, and that this is correlated with a dramatic national decrease in the number of livestock holdings. These results support the hypothesis that Swedish grass snakes are declining and that this may be linked to a loss of important nesting-environments provided by open manure heaps in small-scale farming. Our study suggests that information obtained from museum databases potentially may be used to explore population trends for snakes and other reptiles.
|
|
| 6. |
|
|
| 7. |
|
|
| 8. |
|
|
| 9. |
- Hagman, Mattias
(författare)
-
Pheromone-induced life-history shifts : a novel approach to controlling invasive toads
- 2010
-
Ingår i: Communicative & Integrative Biology. - 1942-0889. ; 3:3, s. 238-239
-
Tidskriftsartikel (refereegranskat)abstract
- In a recent paper,1 we showed that recurrent exposure to alarm pheromones reduced development time and size at metamorphosis in larval cane toads (Bufo marinus). Subsequent measurements of post-metamorphic toads revealed larger parotoid glands relative to body size and increased amounts of bufalin (a toxic bufodienalide) in animals from the experimental treatment, suggesting increased investment in chemical defenses. These findings are of interest for evolutionary theory. But the study was also part of a larger conservation-based research program of which this pheromone work was an important component in the development of a management strategy for reducing the ecological impact of invasive cane toads in Australia. For example, our study1 aimed to quantify biochemical and life-history effects as well as assess the likely longterm impact of pheromone exposure on toads. In this addendum, I discuss the conservation potential of our research, with emphasis on exploiting alarm pheromones to induce viability reducing life-history shifts.
|
|
| 10. |
- Hagman, Mattias
(författare)
-
Pond usage by anuran amphibians
- 2011
-
Ingår i: Ponds: Formation, Characteristics and Uses. - New York : Nova Science Publishers, Inc.. - 9781617613777 ; , s. 1-36
-
Bokkapitel (refereegranskat)
|
|
