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Insect Cold Tolerance: How Many Kinds of Frozen?
POINT OF VIEW Eur. J. Entomol. 96:157—164, 1999 ISSN 1210-5759 Insect cold tolerance: How many kinds of frozen? B rent J. SINCLAIR Department o f Zoology, University o f Otago, PO Box 56, Dunedin, New Zealand; e-mail: [email protected] Key words. Insect, cold hardiness, strategies, Freezing tolerance, Freeze intolerance Abstract. Insect cold tolerance mechanisms are often divided into freezing tolerance and freeze intolerance. This division has been criticised in recent years; Bale (1996) established five categories of cold tolerance. In Bale’s view, freezing tolerance is at the ex treme end of the spectrum o f cold tolerance, and represents insects which are most able to survive low temperatures. Data in the lit erature from 53 species o f freezing tolerant insects suggest that the freezing tolerance strategies o f these species are divisible into four groups according to supercooling point (SCP) and lower lethal temperature (LLT): (1) Partially Freezing Tolerant-species that survive a small proportion o f their body water converted into ice, (2) Moderately Freezing Tolerant-species die less than ten degrees below their SCP, (3) Strongly Freezing Tolerant-insects with LLTs 20 degrees or more below their SCP, and (4) Freezing Tolerant Species with Low Supercooling Points which freeze at very low temperatures, and can survive a few degrees below their SCP. The last 3 groups can survive the conversion of body water into ice to an equilibrium at sub-lethal environmental temperatures. Statistical analyses o f these groups are presented in this paper. However, the data set is small and biased, and there are many other aspects o f freezing tolerance, for example proportion o f body water frozen, and site o f ice nucleation, so these categories may have to be re vised in the future. -
THE QUARTERLY REVIEW of BIOLOGY
VOL. 43, NO. I March, 1968 THE QUARTERLY REVIEW of BIOLOGY LIFE CYCLE ORIGINS, SPECIATION, AND RELATED PHENOMENA IN CRICKETS BY RICHARD D. ALEXANDER Museum of Zoology and Departmentof Zoology The Universityof Michigan,Ann Arbor ABSTRACT Seven general kinds of life cycles are known among crickets; they differ chieff,y in overwintering (diapause) stage and number of generations per season, or diapauses per generation. Some species with broad north-south ranges vary in these respects, spanning wholly or in part certain of the gaps between cycles and suggesting how some of the differences originated. Species with a particular cycle have predictable responses to photoperiod and temperature regimes that affect behavior, development time, wing length, bod)• size, and other characteristics. Some polymorphic tendencies also correlate with habitat permanence, and some are influenced by population density. Genera and subfamilies with several kinds of life cycles usually have proportionately more species in temperate regions than those with but one or two cycles, although numbers of species in all widely distributed groups diminish toward the higher lati tudes. The tendency of various field cricket species to become double-cycled at certain latitudes appears to have resulted in speciation without geographic isolation in at least one case. Intermediate steps in this allochronic speciation process are illustrated by North American and Japanese species; the possibility that this process has also occurred in other kinds of temperate insects is discussed. INTRODUCTION the Gryllidae at least to the Jurassic Period (Zeuner, 1939), and many of the larger sub RICKETS are insects of the Family families and genera have spread across two Gryllidae in the Order Orthoptera, or more continents. -
Variation and Repeatability of Calling Behavior in Crickets Subject to a Phonotactic Parasitoid Fly
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by DigitalCommons@CalPoly Variation and Repeatability of Calling Behavior in Crickets Subject to a Phonotactic Parasitoid Fly Gita Raman Kolluru1 Male Teleogryllus oceanicus (Orthoptera: Gryllidae) produce a conspicuous calling song to attract females. In some populations, the song also attracts the phonotactic parasitoid fly Ormia ochracea (Diptera: Tachinidae). I examined the factors affecting calling song by characterizing the calling behavior of caged crickets from an area where the fly occurs. Calling activity (proportion of time spent calling) was repeatable and a significant predictor of female attraction. However, calling activity in the parasitized population was lower than in an unparasitized Moorea population (Orsak, 1988), suggesting a compromise between high activity to attract females and low activity to avoid flies. Calling activity peaked simultaneously with fly searching, so crickets did not shift to calling when the fly is less active. Males harboring larvae did not call less than unparasitized males; however, a more controlled study of the effects of parasitization on calling behavior is needed to evaluate this result. The results are discussed in the context of other studies of the evolutionary consequences of sexual and natural selection on cricket calling behavior. KEY WORDS: crickets; acoustic signals; calling duration; calling activity; calling patterns; phonotactic parasitoids; repeatability; Orthoptera; Gryllidae; Teleogryllus; Ormia. INTRODUCTION Male field crickets produce a conspicuous, long-range calling song to attract females for mating. However, the song may also attract acoustically-orienting natural enemies (Zuk and Kolluru, 1998). Therefore, both sexual selection and natural selection by eavesdropping enemies can shape the evolution of cricket 1 Department of Biology, University of California, Riverside, California 92521. -
ARTHROPODA Subphylum Hexapoda Protura, Springtails, Diplura, and Insects
NINE Phylum ARTHROPODA SUBPHYLUM HEXAPODA Protura, springtails, Diplura, and insects ROD P. MACFARLANE, PETER A. MADDISON, IAN G. ANDREW, JOCELYN A. BERRY, PETER M. JOHNS, ROBERT J. B. HOARE, MARIE-CLAUDE LARIVIÈRE, PENELOPE GREENSLADE, ROSA C. HENDERSON, COURTenaY N. SMITHERS, RicarDO L. PALMA, JOHN B. WARD, ROBERT L. C. PILGRIM, DaVID R. TOWNS, IAN McLELLAN, DAVID A. J. TEULON, TERRY R. HITCHINGS, VICTOR F. EASTOP, NICHOLAS A. MARTIN, MURRAY J. FLETCHER, MARLON A. W. STUFKENS, PAMELA J. DALE, Daniel BURCKHARDT, THOMAS R. BUCKLEY, STEVEN A. TREWICK defining feature of the Hexapoda, as the name suggests, is six legs. Also, the body comprises a head, thorax, and abdomen. The number A of abdominal segments varies, however; there are only six in the Collembola (springtails), 9–12 in the Protura, and 10 in the Diplura, whereas in all other hexapods there are strictly 11. Insects are now regarded as comprising only those hexapods with 11 abdominal segments. Whereas crustaceans are the dominant group of arthropods in the sea, hexapods prevail on land, in numbers and biomass. Altogether, the Hexapoda constitutes the most diverse group of animals – the estimated number of described species worldwide is just over 900,000, with the beetles (order Coleoptera) comprising more than a third of these. Today, the Hexapoda is considered to contain four classes – the Insecta, and the Protura, Collembola, and Diplura. The latter three classes were formerly allied with the insect orders Archaeognatha (jumping bristletails) and Thysanura (silverfish) as the insect subclass Apterygota (‘wingless’). The Apterygota is now regarded as an artificial assemblage (Bitsch & Bitsch 2000). -
New Canadian and Ontario Orthopteroid Records, and an Updated Checklist of the Orthoptera of Ontario
Checklist of Ontario Orthoptera (cont.) JESO Volume 145, 2014 NEW CANADIAN AND ONTARIO ORTHOPTEROID RECORDS, AND AN UPDATED CHECKLIST OF THE ORTHOPTERA OF ONTARIO S. M. PAIERO1* AND S. A. MARSHALL1 1School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada N1G 2W1 email, [email protected] Abstract J. ent. Soc. Ont. 145: 61–76 The following seven orthopteroid taxa are recorded from Canada for the first time: Anaxipha species 1, Cyrtoxipha gundlachi Saussure, Chloroscirtus forcipatus (Brunner von Wattenwyl), Neoconocephalus exiliscanorus (Davis), Camptonotus carolinensis (Gerstaeker), Scapteriscus borellii Linnaeus, and Melanoplus punctulatus griseus (Thomas). One further species, Neoconocephalus retusus (Scudder) is recorded from Ontario for the first time. An updated checklist of the orthopteroids of Ontario is provided, along with notes on changes in nomenclature. Published December 2014 Introduction Vickery and Kevan (1985) and Vickery and Scudder (1987) reviewed and listed the orthopteroid species known from Canada and Alaska, including 141 species from Ontario. A further 15 species have been recorded from Ontario since then (Skevington et al. 2001, Marshall et al. 2004, Paiero et al. 2010) and we here add another eight species or subspecies, of which seven are also new Canadian records. Notes on several significant provincial range extensions also are given, including two species originally recorded from Ontario on bugguide.net. Voucher specimens examined here are deposited in the University of Guelph Insect Collection (DEBU), unless otherwise noted. New Canadian records Anaxipha species 1 (Figs 1, 2) (Gryllidae: Trigidoniinae) This species, similar in appearance to the Florida endemic Anaxipha calusa * Author to whom all correspondence should be addressed. -
Insect Egg Size and Shape Evolve with Ecology but Not Developmental Rate Samuel H
ARTICLE https://doi.org/10.1038/s41586-019-1302-4 Insect egg size and shape evolve with ecology but not developmental rate Samuel H. Church1,4*, Seth Donoughe1,3,4, Bruno A. S. de Medeiros1 & Cassandra G. Extavour1,2* Over the course of evolution, organism size has diversified markedly. Changes in size are thought to have occurred because of developmental, morphological and/or ecological pressures. To perform phylogenetic tests of the potential effects of these pressures, here we generated a dataset of more than ten thousand descriptions of insect eggs, and combined these with genetic and life-history datasets. We show that, across eight orders of magnitude of variation in egg volume, the relationship between size and shape itself evolves, such that previously predicted global patterns of scaling do not adequately explain the diversity in egg shapes. We show that egg size is not correlated with developmental rate and that, for many insects, egg size is not correlated with adult body size. Instead, we find that the evolution of parasitoidism and aquatic oviposition help to explain the diversification in the size and shape of insect eggs. Our study suggests that where eggs are laid, rather than universal allometric constants, underlies the evolution of insect egg size and shape. Size is a fundamental factor in many biological processes. The size of an 526 families and every currently described extant hexapod order24 organism may affect interactions both with other organisms and with (Fig. 1a and Supplementary Fig. 1). We combined this dataset with the environment1,2, it scales with features of morphology and physi- backbone hexapod phylogenies25,26 that we enriched to include taxa ology3, and larger animals often have higher fitness4. -
Plasticity of the Phonotactic Selectiveness of Four Species of Chirping Crickets (Gryllidae): Implications for Call Recognition Benjamin Navia
Andrews University From the SelectedWorks of Benjamin Navia Winter January 5, 2010 Plasticity of the phonotactic selectiveness of four species of chirping crickets (Gryllidae): Implications for call recognition Benjamin Navia Available at: https://works.bepress.com/benjamin-navia/14/ Physiological Entomology (2010) 35, 99–116 DOI: 10.1111/j.1365-3032.2009.00713.x Plasticity of the phonotactic selectiveness of four species of chirping crickets (Gryllidae): Implications for call recognition JOHN STOUT1, BENJAMIN NAVIA2, JASON JEFFERY1, LESLIE SAMUEL1, LAURA HARTWIG1, ASHLEY BUTLIN1, MARY CHUNG1, JESSICA WILSON1, ERICA DASHNER1 andGORDON ATKINS1 1Biology Department, Andrews University Berrien Springs, Michigan, U.S.A. and 2Department of Human Biology, Kettering College of Medical Arts, Kettering, Ohio, U.S.A. Abstract. Earlier studies of phonotaxis by female crickets describe this selective behavioural response as being important in the females’ choices of conspecific males, leading to reproduction. In the present study, moderate (30+) to very large data sets of phonotactic behaviour by female Acheta domesticus L., Gryllus bimaculatus DeGeer, Gryllus pennsylvanicus Burmeister and Gryllus veletis Alexander demonstrate substantially greater plasticity in the behavioural choices, as made by females of each species, for the syllable periods (SP) of model calling songs (CS) than has been previously described. Phonotactic choices by each species range from the very selective (i.e. responding to only one or two SPs) to very unselective (i.e. responding to all SPs presented). Some females that do not respond to all SPs prefer a range that includes either the longest or shortest SP tested, which fall outside the range of SPs produced by conspecific males. -
Freeze Tolerance in the Spring Field Cricket, Gryllus Veletis
Western University Scholarship@Western Electronic Thesis and Dissertation Repository 7-20-2015 12:00 AM Freeze tolerance in the spring field cricket, Gryllus veletis Alexander H. Mckinnon The University of Western Ontario Supervisor Dr. Brent J. Sinclair The University of Western Ontario Graduate Program in Biology A thesis submitted in partial fulfillment of the equirr ements for the degree in Master of Science © Alexander H. Mckinnon 2015 Follow this and additional works at: https://ir.lib.uwo.ca/etd Part of the Systems and Integrative Physiology Commons Recommended Citation Mckinnon, Alexander H., "Freeze tolerance in the spring field cricket, Gryllus veletis" (2015). Electronic Thesis and Dissertation Repository. 2944. https://ir.lib.uwo.ca/etd/2944 This Dissertation/Thesis is brought to you for free and open access by Scholarship@Western. It has been accepted for inclusion in Electronic Thesis and Dissertation Repository by an authorized administrator of Scholarship@Western. For more information, please contact [email protected]. FREEZE TOLERANCE IN THE SPRING FIELD CRICKET, GRYLLUS VELETIS (Thesis format: Monograph) by Alexander H McKinnon Graduate Program in Biology A thesis submitted in partial fulfillment of the requirements for the degree of Masters in Biology The School of Graduate and Postdoctoral Studies The University of Western Ontario London, Ontario, Canada © Alexander H McKinnon 2015 Abstract Many insects are able to survive internal ice formation. However, the mechanisms underlying freeze tolerance are not well-understood, perhaps because of a lack of suitable model organisms. I found that the spring field cricket, Gryllus veletis, seasonally acquires freeze tolerance in the fall when kept outside in London, Ontario. -
Variation in the Calling Song of the Cricket Gryllus Pennsylvanicus Across Geographic Longitudinal Change
Andrews University Digital Commons @ Andrews University Honors Theses Undergraduate Research 2013 Variation in the Calling Song of the Cricket Gryllus pennsylvanicus Across Geographic Longitudinal Change Ioana Danci Follow this and additional works at: https://digitalcommons.andrews.edu/honors Recommended Citation Danci, Ioana, "Variation in the Calling Song of the Cricket Gryllus pennsylvanicus Across Geographic Longitudinal Change" (2013). Honors Theses. 67. https://digitalcommons.andrews.edu/honors/67 This Honors Thesis is brought to you for free and open access by the Undergraduate Research at Digital Commons @ Andrews University. It has been accepted for inclusion in Honors Theses by an authorized administrator of Digital Commons @ Andrews University. For more information, please contact [email protected]. Thank you for your interest in the Andrews University Digital Library Please honor the copyright of this document by not duplicating or distributing additional copies in any form without the author’s express written permission. Thanks for your cooperation. John Nevins Andrews Scholars Andrews University Honors Program Honors Thesis Variation in the calling song of the cricket Gryllus pennsylvanicus across geographic longitudinal change Ioana Danci April 1, 2013 Advisor: Dr. Gordon Atkins Primary Advisor Signature:_________________ Department: __________________________ ABSTRACT Variation of cricket calling songs can be attributed to environmental factors, including temperature, humidity, vegetation, season, solar elevation, and geographic location. Recent studies found that latitudinal position affects the calling song of male Gryllus pennsylvanicus. My project evaluates whether longitudinal position influences the calling song of G. pennsylvanicus. Using the predicted values of 4 song features based on a mathematical model (Burden 2009), I evaluated data from 6 locations along a longitudinal axis. -
Tradeoff Between Flight Capability and Reproduction in Male
Ecological Entomology (2012), 37, 244–251 DOI: 10.1111/j.1365-2311.2012.01361.x Trade-off between flight capability and reproduction in male Velarifictorus asperses crickets YANG ZENG1 andDAO-HONG ZHU1,2 1Laboratory of Insect Behavior & Evolutionary Ecology, Central South University of Forestry and Technology, Changsha, China and 2Laboratory of Zoology, Hunan First Normal University, Changsha, China Abstract. 1. There are numerous data that support the trade-off between flight capability and reproduction in female wing polymorphic insects, but the relationship between wing form and fitness remains poorly investigated in males. 2. In the present study, the development of flight muscle and gonads, spermatophore size, and multiple copulation ability were investigated in both long-winged (LW) and short-winged (SW) males to verify this trade-off, using a wing dimorphic cricket species Velarifictorus aspersus (Walker). 3. The LW males had better-developed wing muscles than the SW males on the day of emergence, and both of them developed wing muscles after emergence, but the peak of weight in SW males was achieved 4 days later than that of the LW males. The accessory glands (AG) of the LW males developed significantly slower than that of the SW males. These results suggest that development and maintenance of flight muscles have a cost on the development of reproductive organs in male V. asperses. 4. The SW males produced significantly heavier spermatophores in a single copulation and mated more often than LW males. This indicates the SW males have a higher mating success than the LW males, thereby increasing their chance of siring offspring. -
Male Reproductive Competition in the Field Crickets Gryllus Veletis and G
Male Reproductive Competition in the Field Crickets Gryllus veletis and G. pennsylvanicus by Bryan Wade French, B.S. A Thesis submitted to the Department of Biological Sciences in partial fulfillment of the requirements for the degree of Master of Science April 1986 Brock University St. Catharines, Ontario © Bry-an Wade French, 1986 For my Parents and Grandparents 3 ABSTRACT Sexual behavior in the field crickets, Gryllus veletis and G. pennsylvanicus , was studied in outdoor arenas (12 m2) at high and low levels ofpopulation density in 1983 and 1984. Crickets were weighed, individually marked, and observed from 2200 until 0800 hrs for at least 9 continuous nights. Calling was measured at 5 min intervals, and movement and matings were recorded hourly. Continuous 24 hr observations were also conducted,·and occurrences of aggressive and courtship songs were noted. The timing of males searching, calling, courting, and fighting for females should coincide with female movement and mating patterns. For most samples female movement and matings occurred at night in the 24 hr observations and were randomly distributed with time for both species in the 10 hr observations. Male movement for G. veletis high density only was enhanced at night in the 24 hr observations, however, males called more at night in both species at high and low densities. Male movement was randomly distributed with time in the 10 hr observations, and calling increased at dawn for the G. pennsylvanicus 1984 high density sample, but was randomly distributed in other samples. Most courtship and aggression songs in the 24 hr observations were too infrequent for statistical testing and generally did not coincide with matings. -
Characterization of Gromphadorhina Coquereliana Hemolymph Under Cold Stress Jan Lubawy* & Małgorzata Słocińska
www.nature.com/scientificreports OPEN Characterization of Gromphadorhina coquereliana hemolymph under cold stress Jan Lubawy* & Małgorzata Słocińska Low temperatures in nature occur together with desiccation conditions, causing changes in metabolic pathways and cellular dehydration, afecting hemolymph volume, water content and ion homeostasis. Although some research has been conducted on the efect of low temperature on Gromphadorhina coquereliana, showing that it can survive exposures to cold or even freezing, no one has studied the efect of cold on the hemolymph volume and the immune response of this cockroach. Here, we investigated the efect of low temperature (4 °C) on the abovementioned parameters, hemocyte morphology and total number. Cold stress afected hemocytes and the immune response, but not hemolymph volume. After stress, the number of circulating hemocytes decreased by 44.7%, but the ratio of apoptotic cells did not difer signifcantly between stressed and control individuals: 8.06% and 7.18%, respectively. The number of phagocyting hemocytes decreased by 16.66%, the hemocyte morphology drastically changed, and the F-actin cytoskeleton difered substantially in cold-stressed insects compared to control insects. Moreover, the surface area of the cells increased from 393.69 µm2 in the control to 458.38 µm2 in cold-treated animals. Together, our results show the links between cold stress and the cellular immune response, which probably results in the survival capability of this species. Abbreviations CHC Circulating hemocyte count NR Neutral red AC Anticoagulant bufer AMU Adam Mickiewicz University SR-VAD-FMK Sulforhodamine derivative of valyl alanyl aspartic acid fuoromethyl ketone WB Wash bufer THC Total hemocyte count TWC Total water content One of the key elements responsible for the evolutionary success of species is adaptation to adverse environmental conditions.