NOTES ON THE BIOLOGY AND REARING OF TWO SPECIES OF GROUND BEETLES, PTEROSTICHUS MELANARIUS AND HARPALUS PENSYLVANICUS (COLEOPTERA: CARABIDAE)

1975 ◽  
Vol 107 (1) ◽  
pp. 67-74 ◽  
Author(s):  
Alan D. Tomlin

AbstractAdult carabid beetles of the species Harpalus pensylvanicus (DeGeer) and Pterostichus melanarius (Illiger) were collected from a cultivated field near London, Ont., and brought into the laboratory for observation and mass culture in terraria; the culture method is described. Both species oviposited successfully in the laboratory; P. melanarius produced as many as 134 eggs/female over a 6-month period, whereas H. pensylvanicus deposited only about 10 eggs/female under similar conditions. However, percentage emergence in Harpalus was substantially higher (62.6) than with Pterostichus (36.8 and 45.7). Large numbers of first- and second-instar P. melanarius larvae may be obtained by using the rearing method described. The low oviposition rate of H. pensylvanicus made large-scale rearing of this species difficult.Observations are made on the mating behaviour and adult parasitization by horsehair worms (Nematomorpha) of Pterostichus.

1975 ◽  
Vol 107 (5) ◽  
pp. 529-532 ◽  
Author(s):  
A. D. Tomlin

AbstractAdults of predatory carabid beetles (Coleoptera: Carabidae) of the species Stenolophus comma Fabricius field-collected from light traps were bioassayed against several soil insecticides along with laboratory reared larvae of the predatory carabid Pterostichus melanarius Illiger. Adult S. comma beetles were exposed to serial dilutions of insecticides using a Potter spray tower; larvae of P. melanarius were exposed to insecticidally treated Plainfield sand. Fensulfothion, phorate, methomyl, carbofuran, and O,O-diethyl-S(tertbutylthio) methyl phosphorodithioate (Counter®) proved to be highly toxic to adult S. comma with a 0.01% solution causing mortalities > 65%. In the bioassay of P. melanarius larvae, Counter®, phorate, heptachlor, aldrin, and O-(2-chloro-1-(2,5-dichlorophenyl)vinyl) O-methyl ethylphosphonothioate (WL 24073) produced mortalities > 75% at 0.1 p.p.m. in Plainfield sand. The Pterostichus larvae which are probably important as predators of pest insects appear quite susceptible to several important soil insecticides. Chlorfenvinphos, leptophos, and p,p′-DDT were fairly innocuous to both adults and larvae.


2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Gábor Pozsgai ◽  
Ibtissem Ben Fekih ◽  
Markus V. Kohnen ◽  
Said Amrani ◽  
Sándor Bérces ◽  
...  

AbstractDescribing and conserving ecological interactions woven into ecosystems is one of the great challenges of the 21st century. Here, we present a unique dataset compiling the biotic interactions between two ecologically and economically important taxa: ground beetles (Coleoptera: Carabidae) and fungi. The resulting dataset contains the carabid-fungus associations collected from 392 scientific publications, 129 countries, mostly from the Palearctic region, published over a period of 200 years. With an updated taxonomy to match the currently accepted nomenclature, 3,378 unique associations among 5,564 records were identified between 1,776 carabid and 676 fungal taxa. Ectoparasitic Laboulbeniales were the most frequent fungal group associated with carabids, especially with Trechinae. The proportion of entomopathogens was low. Three different formats of the data have been provided along with an interactive data digest platform for analytical purposes. Our database summarizes the current knowledge on biotic interactions between insects and fungi, while offering a valuable resource to test large-scale hypotheses on those interactions.


1988 ◽  
Vol 66 (3) ◽  
pp. 599-604 ◽  
Author(s):  
K. Ovaska ◽  
M. A. Smith

Carabid beetles are suspected to prey on terrestrial salamanders, but no records of this exist. We examined the behavior of two species of ground beetle (Scaphinotus angusticollis and Pterostichus melanarius) towards juvenile western red-backed salamanders (Plethodon vehiculum) in staged laboratory encounters. We predicted that the beetles would show more aggression towards small (snout–vent length (SVL) ≤30 mm) than large (30 < SVL ≤ 40 mm) juvenile salamanders, as small individuals frequently had missing tails (indicating predation) in the field. Our additional objective was to examine antipredator behavior of P. vehiculum. Scaphinotus angusticollis approached, bit, and climbed on the salamanders more frequently than P. melanarius did, but neither beetle behaved differently towards small and large salamanders. Small juveniles jerked away more frequently than larger individuals when bitten by P. melanarius and when climbed on by S. angusticollis, but otherwise the behavior of salamanders of the two size classes did not differ. After overnight encounters, the injuries on the salamanders included missing toes and tail tips and skin lacerations. Scaphinotus angusticollis consumed an additional six P. vehiculum, and P. melanarius consumed three. The damage was unrelated to the size (SVL) of the salamanders, but all individuals consumed were among the smallest we tested. We suggest that in terms of both its morphology and its behavior, S. angusticollis is better suited than P. melanarius to prey on P. vehiculum, and probably preys on hatchlings in the wild.


2020 ◽  
Vol 28 (2) ◽  
pp. 163-174
Author(s):  
A. V. Putchkov ◽  
V. V. Brygadyrenko ◽  
N. Y. Nikolenko

Ground beetles and tiger beetles are the most noticible representatives of predatory invertebrates often used in bioidentificational studies. This article provides quantitative and ecological characteristics of Caraboidea in five metroplises of Ukraine (Dnipro, Donetsk, Kharkiv, Kyiv, and Lviv). In total, in these cities, 237 species of Caraboidea were recorded, belonging to 63 genera and two families – Carabidae (231 species, 61 genera) and Cicindelidae (6 species, 2 genera). By abundance of Carabidae in megapolises, 33 species were identified to abundant. Eudominants were represented by three species: Harpalus rufipes, Pterostichus melanarius and P. оblongopunctatus, dominants – five: Amara aenea, Anchomenus dorsalis, Calathus fuscipes, Harpalus distinguendus and Poecilus versicolor. Subdominants were 25 species: Amara similata, Asaphidion flavipes, Badister bullatus, Bembidion lampros, B. properans, Broscus cephalotes, Calathus ambiguus, C. melanocephalus, Carabus cancellatus, C. coriaceus, C. granulatus, Cylindera germanica, Harpalus affinis, H. anxius, H. griseus, H. latus, H. tardus, Limodromus assimilis, Microlestes minutulus, Nebria brevicollis, Notiophilus palustris, Poecilus cupreus, Pterostichus niger, P. ovoideus and P. strenuus. In the studied cities, 53 species are rare, 151 species were identified to the group of accidental species. For separate cities, number of eudominants ranged from 4 (Donetsk, Kyiv) to 6–8 (Kharkiv, Lviv). Ten species discovered: Amara famelica, A. majuscula, Anisodactylus nemorivagus, Asaphidion pallipes, Badister lacertosus, Blemus discus, Harpalus laeviceps, Limodromus krynickii, Pterostichus minor and Tachyta nana were new for the Steppe zone of Ukraine. Chlaenius aeneocephalus and Brachinus brevicollis were recorded for the first time in the Right Bank of the northern subzone of the steppe zone, and Stenolophus abdominalis mentioned earlier for the far south of Ukraine was for the first time reported for the northern Steppe. Microlestes nеgrita was new for the Forest Steppe, and Masoreus wetterhalli and Syntomus foveatus, known earlier for the forest zone and the south of the steppe zone, were for the first time reported for its northern subzone. The levels of faunistic similarity of Caraboidea for different metropolises ranged within 0.20–0.60 for all species and 0.32–0.90 for abundant species. Most similar were carabidofaunas of Kharkiv and Dnipro (similarity index of Jaccard equaled 0.58–0.87), slightly lower in Dnipro and Kyiv (0.50–0.72). Lowest parameters were seen for Lviv compared with the other cities (0.20–0.32). According to the species composition, the most numerous were meadow (119) and forest elements (59 species). To the polytopic group, 25 species are identified, 23 to the steppe group, and 11 species to the litoral group. In numbers in all the metropolises, the polytopic group dominated, among which abundant species comprised almost half. Within the forest group in Dnipro, Donetsk and Kharkiv, 4–6 abundant species were recorded, whereas in Kyiv and Lviv their number was 14–17 species. Within the meadow group, common species were represented by 4–11 species, and in the steppe and litoral groups such species were absent. In relation to moisture, eudominants were mesophiles (165 species), including 31 abundant species. According to the trophic specialization, zoophages dominated (146 species), including 24 abundant species. Among zoophytophages, 60 species (seven abundant) were recorded. Phytozoophages were represented by 30 species (two abundant). According to mechanical composition of soil, the more diverse groups were observed to be made up species preferring loamy and clay-loamy soils (85 species each), but to the abundant species from these groups, 6 and 10 species respectively were identified. The group of ground beetles with non-manifested preferences to mechanical composition of soil was represented by 41 species, though by number of abundant (17 species), the group was dominant. To inhabitants of heavy loamy, sandy and sabulous soils, 4, 6 and 16 species correspondingly were identified, and no abundant species were observed. At the level of abundant species, the ecological structure was more similar than shown by the analysis of all the species of ground beetles. Hypothetically, typical representatives of carabid beetles of Ukrainian metropolises could be considered polytopic or meadow (to a lesser extent forest) mesophile zoophages or zoophytophages which prefer loam-clayey soils without preference to one or the other type of soil.


2020 ◽  
Vol 66 (Suppl.) ◽  
pp. 49-68
Author(s):  
Agnieszka Kosewska ◽  
Katarzyna Nijak ◽  
Mariusz Nietupski ◽  
Renata Kędzior ◽  
Emilia Ludwiczak

The influence of chemical plant protection on carabid beetle assemblages was studied in an experiment conducted on fields of sugar beet at the IOR-PIB Experimental Station in Winna Góra, Poland. The experiment was composed of a block of control fields (no chemical plant protection treatments) and second block, where plant protection was carried out in compliance with the applicable plant protection program. Ground beetles were caught from May to August/September in four years, using modified Barber traps. As a result of the study, 11 881 specimens belonging to 52 species of Carabidae were collected. The most numerous species were: Harpalus rufipes, Pterostichus melanarius, Calathus ambiguus and Bembidion properans. Overall, our results demonstrate that the application of chemical plant protection treatments decreased the abundance of carabid beetles in sugar beet fields, but had no effect on species richness. The use of pesticides induced changes in some life traits of Carabidae fauna. After a pesticide application, the abundance of macropterous hemizoophages and medium carnivores with the autumn type of breeding decreased, whereas the abundance of small carnivores increased.


1967 ◽  
Vol 06 (01) ◽  
pp. 8-14 ◽  
Author(s):  
M. F. Collen

The utilization of an automated multitest laboratory as a data acquisition center and of a computer for trie data processing and analysis permits large scale preventive medical research previously not feasible. Normal test values are easily generated for the particular population studied. Long-term epidemiological research on large numbers of persons becomes practical. It is our belief that the advent of automation and computers has introduced a new era of preventive medicine.


2021 ◽  
Vol 13 (10) ◽  
pp. 1883
Author(s):  
Yuma Morisaki ◽  
Makoto Fujiu ◽  
Ryoichi Furuta ◽  
Junichi Takayama

In Japan, older adults account for the highest proportion of the population of any country in the world. When large-scale earthquake disasters strike, large numbers of casualties are known to particularly occur among seniors. Many are physically or mentally vulnerable and require assistance during the different phases of disaster response, including rescue, evacuation, and living in an evacuation center. However, the growing number of older adults has made it difficult, after a disaster, to quickly gather information on their locations and assess their needs. The authors are developing a proposal to enable vulnerable people to signal their location and needs in the aftermath of a disaster to response teams by deploying radar reflectors that can be detected in synthetic aperture radar (SAR) satellite imagery. The purpose of this study was to develop a radar reflector kit that seniors could easily assemble in order to make this proposal feasible in practice. Three versions of the reflector were tested for detectability, and a sample of older adults was asked to assemble the kits and provide feedback regarding problems they encountered and regarding their interest in using the reflectors in the event of a large-scale disaster.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Haron M. Abdel-Raziq ◽  
Daniel M. Palmer ◽  
Phoebe A. Koenig ◽  
Alyosha C. Molnar ◽  
Kirstin H. Petersen

AbstractIn digital agriculture, large-scale data acquisition and analysis can improve farm management by allowing growers to constantly monitor the state of a field. Deploying large autonomous robot teams to navigate and monitor cluttered environments, however, is difficult and costly. Here, we present methods that would allow us to leverage managed colonies of honey bees equipped with miniature flight recorders to monitor orchard pollination activity. Tracking honey bee flights can inform estimates of crop pollination, allowing growers to improve yield and resource allocation. Honey bees are adept at maneuvering complex environments and collectively pool information about nectar and pollen sources through thousands of daily flights. Additionally, colonies are present in orchards before and during bloom for many crops, as growers often rent hives to ensure successful pollination. We characterize existing Angle-Sensitive Pixels (ASPs) for use in flight recorders and calculate memory and resolution trade-offs. We further integrate ASP data into a colony foraging simulator and show how large numbers of flights refine system accuracy, using methods from robotic mapping literature. Our results indicate promising potential for such agricultural monitoring, where we leverage the superiority of social insects to sense the physical world, while providing data acquisition on par with explicitly engineered systems.


2004 ◽  
Vol 31 (3) ◽  
pp. 283 ◽  
Author(s):  
Nick Gales ◽  
Robert D. McCauley ◽  
Janet Lanyon ◽  
Dave Holley

The third in a series of five-yearly aerial surveys for dugongs in Shark Bay, Ningaloo Reef and Exmouth Gulf was conducted in July 1999. The first two surveys provided evidence of an apparently stable population of dugongs, with ~1000 animals in each of Exmouth Gulf and Ningaloo Reef, and 10 000 in Shark Bay. We report estimates of less than 200 for each of Exmouth Gulf and Ningaloo Reef and ~14 000 for Shark Bay. This is an apparent overall increase in the dugong population over this whole region, but with a distributional shift of animals to the south. The most plausible hypothesis to account for a large component of this apparent population shift is that animals in Exmouth Gulf and Ningaloo Reef moved to Shark Bay, most likely after Tropical Cyclone Vance impacted available dugong forage in the northern habitat. Bias associated with survey estimate methodology, and normal changes in population demographics may also have contributed to the change. The movement of large numbers of dugongs over the scale we suggest has important management implications. First, such habitat-driven shifts in regional abundance will need to be incorporated in assessing the effectiveness of marine protected areas that aim to protect dugongs and their habitat. Second, in circumstances where aerial surveys are used to estimate relative trends in abundance of dugongs, animal movements of the type we propose could lead to errors in interpretation.


Science ◽  
2021 ◽  
pp. eabi8870
Author(s):  
Saba Parvez ◽  
Chelsea Herdman ◽  
Manu Beerens ◽  
Korak Chakraborti ◽  
Zachary P. Harmer ◽  
...  

CRISPR-Cas9 can be scaled up for large-scale screens in cultured cells, but CRISPR screens in animals have been challenging because generating, validating, and keeping track of large numbers of mutant animals is prohibitive. Here, we report Multiplexed Intermixed CRISPR Droplets (MIC-Drop), a platform combining droplet microfluidics, single-needle en masse CRISPR ribonucleoprotein injections, and DNA barcoding to enable large-scale functional genetic screens in zebrafish. The platform can efficiently identify genes responsible for morphological or behavioral phenotypes. In one application, we show MIC-Drop can identify small molecule targets. Furthermore, in a MIC-Drop screen of 188 poorly characterized genes, we discover several genes important for cardiac development and function. With the potential to scale to thousands of genes, MIC-Drop enables genome-scale reverse-genetic screens in model organisms.


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