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Still life with insects
Following a nervous breakdown, Elwyn Farmer finds stability and broad insight by keeping a journal of his insect sightings--an endeavor that also reveals a great deal about his family and himself.
Book
Developmental Plasticity of the Flesh Fly Blaesoxipha plinthopyga
Forensic entomologists rely on laboratory growth data to estimate the time of colonization on human remains thus extrapolating a minimum postmortem interval (PMI) if assumptions are satisfied. The flesh fly Blaesoxipha plinthopyga (Wiedemann) is one species that occurs in casework in Idaho, Texas, and central California. Because of the few laboratory studies on the development of this fly, the following study was conducted to determine if different substrates impact immature development of the species. In this study, flies were reared on different substrates that are likely to be encountered at indoor and outdoor scenes (Wet Sand, Dry Sand, Clothes [Polyester fibers], and Carpet [Polypropylene fibers]) to determine the influence of substrate on larval, intrapuparial, and total immature development times at 25[degrees]C, 50% RH, and 14:10 (L:D) h cycle. The results revealed that substrate significantly affected minimum immature development times without affecting the sexes differently; though a female bias in sex ratio was observed consistently. Average minimum larval developmental times were 160-179 h with a significantly faster development in Carpet than in Clothes. Similarly, average minimum intrapuparial developmental times were 331-352 h; fastest on Carpet and the slowest in Dry Sand. For this species, it may be important to consider the substrates encountered at a death scene as they may affect the development of B. plinthopyga (Wiedemann) in casework by up to 29 h at 25[degrees]C and 50% humidity. These effects will also be important to consider when planning future development studies with the species.
Journal Article
An automated procedure ten times more efficient in cutting labels for entomological collections
. The labelling of entomological material is a labour-intensive and time-consuming task, often carried out by staff who are over-qualified for the task. This paper introduces a small automation step that speeds up this process via a method that uses a low-cost cutting plotter. The following text will present a financial and temporal analysis of the introduction and use of this equipment in labelling an entomological collection with any kind of labels.
Journal Article
Carried with the wind: mass occurrence of Zeiraphera griseana
Vize Island, located in the northern part of the Kara Sea (79°30'N, 76°59'E), is one of the least studied islands of the Russian High Arctic in terms of its biota. Hundreds of live and freshly dead individuals of Larch Budmoth Zeiraphera griseana (Hübner, 1799) were observed on this island from 16 July-2 August 2020. This is the first and the only terrestrial invertebrate ever discovered on Vize Island. The moths were likely transported to the island by air currents from the northern part of the Krasnoyarsk region, where an outbreak of Z. griseana was reported on over 75,000 ha. The distance travelled by moths approached 1200 km. Thus, the high Arctic islands are less isolated from insect migrants than was commonly thought. These islands will be colonised by boreal insects as soon as changing environmental conditions allow the establishment of local populations.
Journal Article
Small wonders : Jean-Henri Fabre & his world of insects
\"Meet Jean-Henri Fabre, one of the most important naturalists of all time, whose own life was as unusual as the lives of the creatures he studied\"--Front jacket flap.
Book
Development of Lucilia sericata
Forensic entomologists usually estimate the minimum postmortem interval ([PMI.sub.min]) using the time required for the oldest immature insects found on the corpse to grow to its development stage and age at the time of discovery. The sheep blow fly Lucilia sericata (Meigen, 1826) is a carrion fly found nearly worldwide, and important in forensics.We studied the development time of L. sericata from egg to adult at constant temperatures of 16, 19, 22, 25, 28, 31, and 34[degrees]C, and found that the times required are 913.2 [+ or -] 19.4, 588.8 [+ or -] 35.8, 459.8 [+ or -] 15.2, 373.2 [+ or -] 15.3,308.0 [+ or -] 9.7, 272.5 [+ or -] 9.2, and 267.5 [+ or -] 10.5 h, respectively. We established three development models to infer the age of the immature insect: isomegalen diagram, isomorphen diagram, and thermal summation model. In addition, a regression analysis was performed on the relationship between body length and total development time from hatching to dispersing. The thermal summation constant during the development of L. sericata is 6023.2 degree hours and development threshold temperature is 9.19[degrees]C.The results of this experiment provide a basis for the use of L. sericata in the estimation of [PMI.sub.min].
Journal Article