Video analysis of predation by polyphagous invertebrate predators in the laboratory and field

Merfield, Charles N.; Wratten, Stephen D.; Navntoft, Søren

doi:10.1016/s1049-9644(03)00095-1

Cited by 30 publications

(24 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Predation rate was assessed using 'prey surrogates' comprising 25cm 2 water-proof sandpaper squares pinned to the soil surface by wooden toothpicks (Merfield et al, 2004;Frank et al, 2007). Live aphids (dorsal side uppermost) were glued onto the sandpaper (P150, Norton) using 3M repositionable glue in a grid pattern with 1cm between aphids.…”

Section: Biological Control Of Pestsmentioning

confidence: 99%

The future of farming: The value of ecosystem services in conventional and organic arable land. An experimental approach

Sandhu

Wratten

Cullen

et al. 2008

Ecological Economics

205

113

View full text Add to dashboard Cite

In the current work, a novel, experimental 'bottom-up' approach is used to quantify the economic value of ecosystem services (ES) associated with highly modified arable landscapes in Canterbury, New Zealand. First, the role of land management practices in the maintenance and enhancement of ES in agricultural land was investigated by quantifying the economic value of ES at the field level under organic and conventional arable systems. This quantification was based on an experimental approach in contrast with the earlier value transfer methods. conventional farming shifted to organic practices, the total economic value of ES would be US $192 million and US $166 million annually for organic and conventional arable area, respectively. In this case, the non-market value of ES for the organic area was US $65 million and that of conventional area was US $35 million annually. This study demonstrated that arable farming provides a range of ES which can be measured using field experiments based on ecological principles by incorporating a 'bottom-up'approach. The work also showed that conventional New Zealand arable farming 3 practices can severely reduce the financial contribution of some of these services in agriculture whereas organic agriculture practices enhance their economic value.

show abstract

Section: Biological Control Of Pestsmentioning

confidence: 99%

The future of farming: The value of ecosystem services in conventional and organic arable land. An experimental approach

Sandhu

Wratten

Cullen

et al. 2008

Ecological Economics

205

113

View full text Add to dashboard Cite

show abstract

“…Video technology can provide information on the spectrum of prey attacked by predators (or those predators consuming sedentary prey) (e.g. Merfield, Wratten & Navntoft 2004), but for most generalist predators, information is limited to those interactions in the view of the camera (which may constitute a small fraction of total predation events). The collection of samples from the field, and subsequent post‐mortem analysis of gut or faecal samples, is highly advantageous in that predation events are allowed to occur naturally, without interference or bias towards certain prey types (Sunderland 1988; Harwood & Obrycki 2005).…”

Section: Introductionmentioning

confidence: 99%

Advances in molecular ecology: tracking trophic links through predator–prey food‐webs

2005

View full text Add to dashboard Cite

Summary 1.It is not always possible to track trophic interactions between predators and prey by direct observation. This is especially true when observing small or elusive animals with cryptic food-web ecology. Gut and/or faecal analysis can sometimes allow prey remains to be identified visually but is only possible when a component of the diet is resistant to digestion. In some cases there are no solid remains, and when there are it can lead to bias in interpretation of prey choice. 2. Numerous invasive and non-invasive methods have been developed to characterize predator-prey interactions but two principal areas dominate 'molecular' research. These are reviewed under the headings of monoclonal antibodies and DNA-based techniques. 3. Early 'molecular' studies of predator-prey food webs were dominated by the development of monoclonal antibodies. These methods continue to be used for mass-screening of field-collected arthropods for insect-specific proteins. 4. The application of species-specific primer design, polymerase chain reaction (PCR), restriction fragment length polymorphism analysis (RFLP), DNA cloning and sequencing, comparative sequence analysis (e.g. BLAST; basic local alignment search tool), high-resolution gel electrophoresis, Temperature/denaturing gradient gel electrophoresis (TGGE/DGGE) and automated fragment analysis with fluorescent probes is reviewed. The development of molecular techniques for use in predator-prey studies is primarily limited by their cost and the development of new procedures and equipment that complement them.

show abstract

“…In contrast, predation events on immobile prey including coleopteran, dipteran and lepidopteran eggs, lepidopteran pupae, and overwintering cocooned lepidopteran larvae have been successfully recorded (Merfield et al. ; Grieshop et al. ; Walton ).…”

Section: Discussionmentioning

confidence: 99%

“…Cameras in these studies are often aimed at Petri dishes on the ground (Merfield et al. ; Frank et al. ; Grieshop et al.…”

Section: Discussionmentioning

confidence: 99%

Comparison of sampling methods of Aphis glycines predators across the diel cycle

Woltz

Landis

2013

J Applied Entomology

View full text Add to dashboard Cite

Nocturnal predators are often overlooked in biological control studies, despite evidence that they can make important contributions to insect pest suppression in agroecosystems. Many sampling methods are only employed during the daytime hours due to limitations of time and labour. Additionally, different sampling methods can provide contrasting information about natural enemy community composition and relative abundance. Here, we use Aphis glycines and its arthropod predators as a model system to compare natural enemy community composition described by vacuum samples, direct observations and video observations across the diel cycle in soybean. All sampling methods identified several common taxa. Anthocorids were dominant in vacuum samples and direct observations, and both methods indicated that this taxa may be more active in the afternoon. In contrast, anthocorids were recorded infrequently on video, possibly due to their small size. On video samples, lacewing larvae were the most active taxa during the day and lacewing larvae, spiders, opiliones and carabids were the most active taxa at night. We directly observed 22 predation events on soybean aphid: 17 by anthocorids, two by chrysopid larvae, and one each by a coccinellid, spider and predatory mite. The differences between the sample methods suggest that vacuum samples may represent predator abundance more accurately, while video data may miss small predators, but can be used to better assess relative time spent foraging.

show abstract

Video analysis of predation by polyphagous invertebrate predators in the laboratory and field

Cited by 30 publications

References 26 publications

The future of farming: The value of ecosystem services in conventional and organic arable land. An experimental approach

The future of farming: The value of ecosystem services in conventional and organic arable land. An experimental approach

Advances in molecular ecology: tracking trophic links through predator–prey food‐webs

Comparison of sampling methods of Aphis glycines predators across the diel cycle

Contact Info

Product

Resources

About