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Variation in Mayfly Size at Metamorphosis As a Developmental Response to Risk of Predation
Ecology, 82(3), 2001, pp. 740±757 q 2001 by the Ecological Society of America VARIATION IN MAYFLY SIZE AT METAMORPHOSIS AS A DEVELOPMENTAL RESPONSE TO RISK OF PREDATION BARBARA L. PECKARSKY,1,3,5 BRAD W. T AYLOR,1,3 ANGUS R. MCINTOSH,2,3 MARK A. MCPEEK,4 AND DAVID A. LYTLE1 1Department of Entomology, Cornell University, Ithaca, New York 14853 USA 2Department of Zoology, University of Canterbury, Private Bag 4800, Christchurch, New Zealand 3Rocky Mountain Biological Laboratory, P.O. Box 519, Crested Butte, Colorado 81224 USA 4Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire 03755 USA Abstract. Animals with complex life cycles often show large variation in the size and timing of metamorphosis in response to environmental variability. If fecundity increases with body size and large individuals are more vulnerable to predation, then organisms may not be able to optimize simultaneously size and timing of metamorphosis. The goals of this study were to measure and explain large-scale spatial and temporal patterns of phe- notypic variation in size at metamorphosis of the may¯y, Baetis bicaudatus (Baetidae), from habitats with variable levels of predation risk. Within a single high-elevation watershed in western Colorado, USA, from 1994 to 1996 we measured dry masses of mature larvae of the overwintering and summer generations of Baetis at 28 site-years in streams with and without predatory ®sh (trout). We also estimated larval growth rates and development times at 16 site-years. Patterns of spatial variation in may¯y size could not be explained by resource (algae) standing stock, competitor densities, or physical±chemical variables. -
Gill Mobility in the Baetidae (Ephemeroptera): Results of a Short Study in Africa
GILL MOBILITY IN THE BAETIDAE (EPHEMEROPTERA): RESULTS OF A SHORT STUDY IN AFRICA MICHAEL T. GJLLIES Whitfeld, Hamsey, Lewes, Sussex, BN8 STD, England Afroptilum was the only genus of Baetidae observed with mobile gills in African streams. Other members of the Cloeon group of genera from fast-running water, including Dicentroptilum, Rhithrocloeon, Afrobaetodes, Centroptiloides and Platycloeon had rigid gills. No gill movements were observed in any species of Baetis s.l. No structural features of the gills appeard to be correlated with this behaviour. Gill movement is seen as an adaptation by Afroptilum to lower current speeds. Mobility of the gills is thought to be the plesiomorphic state. INTRODUCTION the vicinity of the research station of Amani. It lies at an altitude of 600-900 m and is fed by a number of streams draining the forested slopes of the surrounding hills. It had KLuGE et al. (1984) were the first to note that in the advantage that intermittent studies of the mayfly fauna the family Baetidae gill vibration is confined to have been made in the past so that the identity of most taxa the subfamily Cloeninae (referred to here as the could be firmly established. The availability of laboratory Cloeon-group of genera). They concluded it had facilities was also a great help. The study was limited to a tree-week period during the months of November and been lost in the subfamily Baetinae (Baetis December, 1993. group of genera). In a later paper, NovrKovA & The essential observations were made at the riverside. I KLUGE ( 1987) remarked that Baetis was sharply collected nymphs with a sweep net and transferred them differentiated from all members of the Cloeon directly from the holding pan into individual dishes for group genera in which gills are developed as a study under a portable stereomicroscope at a magnification of 20 diameters. -
“Two-Tailed” Baetidae of Ohio January 2013
Ohio EPA Larval Key for the “two-tailed” Baetidae of Ohio January 2013 Larval Key for the “two-tailed” Baetidae of Ohio For additional keys and descriptions see: Ide (1937), Provonsha and McCafferty (1982), McCafferty and Waltz (1990), Lugo-Ortiz and McCafferty (1998), McCafferty and Waltz (1998), Wiersema (2000), McCafferty et al. (2005) and McCafferty et al. (2009). 1. Forecoxae with filamentous gill (may be very small), gills usually with dark clouding, cerci without dark band near middle, claws with a smaller second row of teeth. .............................. ............................................................................................................... Heterocloeon (H.) sp. (Two species, H. curiosum (McDunnough) and H. frivolum (McDunnough), are reported from Ohio, however, the larger hind wing pads used by Morihara and McCafferty (1979) to distinguish H. frivolum have not been verified by OEPA.) Figures from Ide, 1937. Figures from Müller-Liebenau, 1974. 1'. Forecoxae without filamentous gill, other characters variable. .............................................. 2 2. Cerci with alternating pale and dark bands down its entire length, body dorsoventrally flattened, gills with a dark clouded area, hind wing pads greatly reduced. ............................... ......................................................................................... Acentrella parvula (McDunnough) Figure from Ide, 1937. Figure from Wiersema, 2000. 2'. Cerci without alternating pale and dark bands, other characters variable. ............................ -
Biological Objectives for Rivers and Streams – Ecosystem Protection
INFORMATION BULLETIN BIOLOGICAL OBJECTIVES FOR RIVERS AND STREAMS – ECOSYSTEM PROTECTION INFORMATION BULLETIN BIOLOGICAL OBJECTIVES FOR RIVERS AND STREAMS – ECOSYSTEM PROTECTION Freshwater Sciences EPA Victoria 40 City Road, Southbank Victoria 3006 AUSTRALIA Key Contributors: Leon Metzeling, Fiona Wells, Peter Newall, David Tiller and Julia Reed Publication 793.2 ISBN 0 7306 7604 8 © EPA Victoria, March 2004 CONTENTS 1 INTRODUCTION ...........................................................................................................................................1 1.1 Background ............................................................................................................................................1 1.2 Context and scope ..................................................................................................................................1 2 USING INVERTEBRATES AS BIOLOGICAL INDICATORS...................................................................................3 2.1 Aquatic invertebrates ..............................................................................................................................3 2.2 Sensitivity to change...............................................................................................................................3 2.3 Taxonomic resolution..............................................................................................................................4 2.4 Sampling protocol...................................................................................................................................4 -
The Mayfly Newsletter: Vol
Volume 20 | Issue 2 Article 1 1-9-2018 The aM yfly Newsletter Donna J. Giberson The Permanent Committee of the International Conferences on Ephemeroptera, [email protected] Follow this and additional works at: https://dc.swosu.edu/mayfly Part of the Biology Commons, Entomology Commons, Systems Biology Commons, and the Zoology Commons Recommended Citation Giberson, Donna J. (2018) "The aM yfly eN wsletter," The Mayfly Newsletter: Vol. 20 : Iss. 2 , Article 1. Available at: https://dc.swosu.edu/mayfly/vol20/iss2/1 This Article is brought to you for free and open access by the Newsletters at SWOSU Digital Commons. It has been accepted for inclusion in The Mayfly eN wsletter by an authorized editor of SWOSU Digital Commons. An ADA compliant document is available upon request. For more information, please contact [email protected]. The Mayfly Newsletter Vol. 20(2) Winter 2017 The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera In this issue Project Updates: Development of new phylo- Project Updates genetic markers..................1 A new study of Ephemeroptera Development of new phylogenetic markers to uncover island in North West Algeria...........3 colonization histories by mayflies Sereina Rutschmann1, Harald Detering1 & Michael T. Monaghan2,3 Quest for a western mayfly to culture...............................4 1Department of Biochemistry, Genetics and Immunology, University of Vigo, Spain 2Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany 3 Joint International Conf. Berlin Center for Genomics in Biodiversity Research, Berlin, Germany Items for the silent auction at Email: [email protected]; [email protected]; [email protected] the Aracruz meeting (to sup- port the scholarship fund).....6 The diversification of evolutionary young species (<20 million years) is often poorly under- stood because standard molecular markers may not accurately reconstruct their evolutionary How to donate to the histories. -
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). -
Amphiesmeno- Ptera: the Caddisflies and Lepidoptera
CY501-C13[548-606].qxd 2/16/05 12:17 AM Page 548 quark11 27B:CY501:Chapters:Chapter-13: 13Amphiesmeno-Amphiesmenoptera: The ptera:Caddisflies The and Lepidoptera With very few exceptions the life histories of the orders Tri- from Old English traveling cadice men, who pinned bits of choptera (caddisflies)Caddisflies and Lepidoptera (moths and butter- cloth to their and coats to advertise their fabrics. A few species flies) are extremely different; the former have aquatic larvae, actually have terrestrial larvae, but even these are relegated to and the latter nearly always have terrestrial, plant-feeding wet leaf litter, so many defining features of the order concern caterpillars. Nonetheless, the close relationship of these two larval adaptations for an almost wholly aquatic lifestyle (Wig- orders hasLepidoptera essentially never been disputed and is supported gins, 1977, 1996). For example, larvae are apneustic (without by strong morphological (Kristensen, 1975, 1991), molecular spiracles) and respire through a thin, permeable cuticle, (Wheeler et al., 2001; Whiting, 2002), and paleontological evi- some of which have filamentous abdominal gills that are sim- dence. Synapomorphies linking these two orders include het- ple or intricately branched (Figure 13.3). Antennae and the erogametic females; a pair of glands on sternite V (found in tentorium of larvae are reduced, though functional signifi- Trichoptera and in basal moths); dense, long setae on the cance of these features is unknown. Larvae do not have pro- wing membrane (which are modified into scales in Lepi- legs on most abdominal segments, save for a pair of anal pro- doptera); forewing with the anal veins looping up to form a legs that have sclerotized hooks for anchoring the larva in its double “Y” configuration; larva with a fused hypopharynx case. -
Identification Guide to the Australian Odonata Australian the to Guide Identification
Identification Guide to theAustralian Odonata www.environment.nsw.gov.au Identification Guide to the Australian Odonata Department of Environment, Climate Change and Water NSW Identification Guide to the Australian Odonata Department of Environment, Climate Change and Water NSW National Library of Australia Cataloguing-in-Publication data Theischinger, G. (Gunther), 1940– Identification Guide to the Australian Odonata 1. Odonata – Australia. 2. Odonata – Australia – Identification. I. Endersby I. (Ian), 1941- . II. Department of Environment and Climate Change NSW © 2009 Department of Environment, Climate Change and Water NSW Front cover: Petalura gigantea, male (photo R. Tuft) Prepared by: Gunther Theischinger, Waters and Catchments Science, Department of Environment, Climate Change and Water NSW and Ian Endersby, 56 Looker Road, Montmorency, Victoria 3094 Published by: Department of Environment, Climate Change and Water NSW 59–61 Goulburn Street Sydney PO Box A290 Sydney South 1232 Phone: (02) 9995 5000 (switchboard) Phone: 131555 (information & publication requests) Fax: (02) 9995 5999 Email: [email protected] Website: www.environment.nsw.gov.au The Department of Environment, Climate Change and Water NSW is pleased to allow this material to be reproduced in whole or in part, provided the meaning is unchanged and its source, publisher and authorship are acknowledged. ISBN 978 1 74232 475 3 DECCW 2009/730 December 2009 Printed using environmentally sustainable paper. Contents About this guide iv 1 Introduction 1 2 Systematics -
Diversity and Ecosystem Services of Trichoptera
Review Diversity and Ecosystem Services of Trichoptera John C. Morse 1,*, Paul B. Frandsen 2,3, Wolfram Graf 4 and Jessica A. Thomas 5 1 Department of Plant & Environmental Sciences, Clemson University, E-143 Poole Agricultural Center, Clemson, SC 29634-0310, USA; [email protected] 2 Department of Plant & Wildlife Sciences, Brigham Young University, 701 E University Parkway Drive, Provo, UT 84602, USA; [email protected] 3 Data Science Lab, Smithsonian Institution, 600 Maryland Ave SW, Washington, D.C. 20024, USA 4 BOKU, Institute of Hydrobiology and Aquatic Ecology Management, University of Natural Resources and Life Sciences, Gregor Mendelstr. 33, A-1180 Vienna, Austria; [email protected] 5 Department of Biology, University of York, Wentworth Way, York Y010 5DD, UK; [email protected] * Correspondence: [email protected]; Tel.: +1-864-656-5049 Received: 2 February 2019; Accepted: 12 April 2019; Published: 1 May 2019 Abstract: The holometabolous insect order Trichoptera (caddisflies) includes more known species than all of the other primarily aquatic orders of insects combined. They are distributed unevenly; with the greatest number and density occurring in the Oriental Biogeographic Region and the smallest in the East Palearctic. Ecosystem services provided by Trichoptera are also very diverse and include their essential roles in food webs, in biological monitoring of water quality, as food for fish and other predators (many of which are of human concern), and as engineers that stabilize gravel bed sediment. They are especially important in capturing and using a wide variety of nutrients in many forms, transforming them for use by other organisms in freshwaters and surrounding riparian areas. -
A Phylogenetic Review of the Species Groups of Phylocentropus Banks (Trichoptera: Dipseudopsidae)
Zoosymposia 18: 143–152 (2020) ISSN 1178-9905 (print edition) https://www.mapress.com/j/zs ZOOSYMPOSIA Copyright © 2020 · Magnolia Press ISSN 1178-9913 (online edition) https://doi.org/10.11646/zoosymposia.18.1.18 http://zoobank.org/urn:lsid:zoobank.org:pub:964C864A-89AC-4ECC-B4D2-F5ACD9F2C05C A phylogenetic review of the species groups of Phylocentropus Banks (Trichoptera: Dipseudopsidae) JOHN S. WEAVER USDA, 230-59 International Airport Cen. Blvd., Bldg. C, Suite 100, Rm 109, Jamaica, New York, 11431, USA. [email protected]; https://orcid.org/0000-0002-5684-0899 ABSTRACT A phylogenetic review of the three species groups of the caddisfly genus Phylocentropus Banks, proposed by Ross (1965), is provided. The Phylocentropus auriceps Species Group contains 9 species: †P. antiquus, P. auriceps, †P. cretaceous, †P. gelhausi, †P. ligulatus, †P. simplex, †P. spiniger, †P. succinolebanensis, and †P. swolenskyi,; the P. placidus Species Group, 4 species: P. carolinus, P. harrisi, P. lucidus, and P. placidus; and the P. orientalis Species Group, 7 species: P. anas, P. narumonae, P. ngoclinh, P. orientalis, P. shigae, P. tohoku, and P. vietnamellus. A hypothetical phylogenetic tree of the genus is presented along with its historic biogeography. Keywords: Trichoptera, Dipseudopsidae, Phylocentropus, amber, systematics, phylogeny, biogeography, Cretaceous, Eocene Ross (1965) proposed three species groups for the genus Phylocentropus which at the time contained 10 spe- cies: 6 extant species (4 from eastern North America and 2 from eastern Asia) and 4 extinct species from Baltic amber. Since then 10 additional species of Phylocentropus have been discovered: 6 extant species (1 from southeastern North America and 5 from Southeast Asia) and 4 fossil species from New Jersey and Lebanese amber. -
Critical Species of Odonata in Australia
---Guardians of the watershed. Global status of Odonata: critical species, threat and conservation --- Critical species of Odonata in Australia John H. Hawking 1 & Gunther Theischinger 2 1 Cooperative Research Centre for Freshwater Ecology, Murray-Darling Freshwater Research Centre, PO Box 921, Albury NSW, Australia 2640. <[email protected]> 2 Environment Protection Authority, New South Wales, 480 Weeroona Rd, Lidcombe NSW, Australia 2141. <[email protected]> Key words: Odonata, dragonfly, IUCN, critical species, conservation, Australia. ABSTRACT The Australian Odonata fauna is reviewed. The state of the current taxonomy and ecology, studies on biodiversity, studies on larvae and the all identification keys are reported. The conservation status of the Australian odonates is evaluated and the endangered species identified. In addition the endemic species, species with unusual biology and species, not threatened yet, but maybe becoming critical in the future are discussed and listed. INTRODUCTION Australia has a diverse odonate fauna with many relict (most endemic) and most of the modern families (Watson et al. 1991). The Australian fauna is now largely described, but the lack of organised surveys resulted in limited distributional and ecological information. The conservation of Australian Odonata also received scant attention, except for Watson et al. (1991) promoting the awareness of Australia's large endemic fauna, the listing of four species as endangered (Moore 1997; IUCN 2003) and the suggesting of categories for all Australian species (Hawking 1999). This conservation report summarizes the odonate studies/ literature for species found in Continental Australia (including nearby smaller and larger islands) plus Lord Howe Island and Norfolk Island. Australia encompasses tropical, temperate, arid, alpine and off shore island climatic regions, with the land mass situated between latitudes 11-44 os and 113-154 °E, and flanked on the west by the Indian Ocean and on the east by the Pacific Ocean. -
New Larvae of Baetidae (Insecta: Ephemeroptera) from Espiritu Santo, Vanuatu
Stuttgarter Beiträge zur Naturkunde A, Neue Serie 4: 75–82; Stuttgart, 30.IV.2011. 75 New larvae of Baetidae (Insecta: Ephemeroptera) from Espiritu Santo, Vanuatu JEAN-LUC GATTOLLIAT & ARNOLD H. STANICZEK Abstract During the Global Biodiversity Survey “Santo 2006” conducted in Espiritu Santo, Vanuatu, mayfl y larvae were collected in several streams of the island. This contribution deals with the larvae of Baetidae (Insecta: Ephemerop- tera) that are represented by two species: Labiobaetis paradisus n. sp. and Cloeon sp. The presence of these two genera is not surprising as they both possess almost a worldwide distribution and constitute a great part of Austral- asian Baetidae diversity. Diagnoses of these two species are provided and their affi nities are discussed. K e y w o r d s : Australasia, Cloeon erromangense, Labiobaetis paradisus, mayfl ies, new species, Santo 2006, taxonomy. Zusammenfassung Im Rahmen der auf Espiritu Santo, Vanuatu, durchgeführten Biodiversitätserfassung “Santo 2006” wurden Eintagsfl iegenlarven in verschiedenen Fließgewässern der Insel gesammelt. Der vorliegende Beitrag behandelt die Larven der Baetidae (Insecta: Ephemeroptera), die mit zwei Arten vertreten sind: Labiobaetis paradisus n. sp. and Cloeon sp. Der Nachweis beider Gattungen ist nicht überraschend, da diese eine nahezu weltweite Verbreitung be- sitzen und einen großen Anteil der Diversität australasiatischer Baetidae ausmachen. Die beiden Arten werden be- schrieben, beziehungsweise eine Diagnose gegeben, und Unterschiede zu anderen Formen werden diskutiert.