Checklist of Sawflies (Hymenoptera: Symphyta) from Iran
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The Potential of Restored Landfill Sites to Support Pollinating Insects
The potential of restored landfill sites to support pollinating insects Submitted for the Degree of Doctor of Philosophy at the University of Northampton 2009 Sam Tarrant UNIVERSITY OF NORTHAMPTON /\V £ I f c bARY i D V V 1 ACC. No. 10*54-^ CLASS N O j)gSS C1657<(o TftQ Abstract Habitat restoration is an important tool in reducing the current decline in biodiversity. To determine the success of restoration, ecologists have previously focused on species richness or on the presence of rare species; little is known of species interactions. This study examines both the potential of restored landfill sites to support pollinating insects and how flower-insect interactions can be used in determining successful restoration. These are important attributes of ecosystem function. Standard belt transects were used to record flowering insect pollinated plants and flower-visiting insects on nine paired restored landfill and reference nature sites, in the broader Northamptonshire region (UK). Over the duration of this study, an area of 25,000m2 was surveyed for floral characteristics and approximately 138,000 floral units were counted from c)8 plant species. A total of 201 flower visitor surveys were performed, with 942 flower-visiting insect samples taken. Flowering plant species richness and abundance of floral resources on restored landfill sites were not found to be significantly different from those on reference sites and the flower-visiting insect assemblages were similar in terms of species-richness and abundance. Interaction structures were examined and whilst the plant-insect assemblages had few species in common, both showed similar levels of nestedness and connectance. -
Hymenoptera: Tenthredinidae)
Zootaxa 4227 (4): 583–592 ISSN 1175-5326 (print edition) http://www.mapress.com/j/zt/ Article ZOOTAXA Copyright © 2017 Magnolia Press ISSN 1175-5334 (online edition) https://doi.org/10.11646/zootaxa.4227.4.8 http://zoobank.org/urn:lsid:zoobank.org:pub:4933B61B-700C-4F7A-A6CE-83B88359CF82 Pachyprotasis kojimai sp. nov.—the “Pachyprotasis nigronotata” of Japanese authors (Hymenoptera: Tenthredinidae) ANDREAS TAEGER1,3, AKIHIKO SHINOHARA2 & KATJA KRAMP1 1Senckenberg Deutsches Entomologisches Institut (SDEI), Eberswalder Str. 90, 15374 Müncheberg, Germany. E-mail: [email protected], [email protected] 2Department of Zoology, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba-shi, Ibaraki, 305-0005 Japan. E-mail: [email protected] 3Corresponding author Abstract The species formerly known as Pachyprotasis nigronotata Kriechbaumer, 1874 in Japan is described as P. kojimai Taeger & Shinohara, sp. nov. Both taxa are not very closely related, but were hitherto mixed up because of their similar color- ation. The new species is endemic to the mountains of central Honshu and P. nigronotata is to be deleted from the fauna of Japan. Key words: Symphyta, sawflies, Japan, COI barcoding, relationships Introduction During an expedition to the Nagano area at Honshu, Japan, that was carried out by the first two authors together with Mr. Haruyoshi Kojima, several specimens of a very conspicuous bright green Pachyprotasis species were collected. In the field these specimens were named Pachyprotasis nigronotata, but already there it was noted that the latter species in Europe has a rather different appearance in coloration. Subsequently we noted that the species previously named nigronotata in Japan is hitherto undescribed. -
Alien and Invasive Species of Harmful Insects in Bosnia and Herzegovina
Alien and invasive species of harmful insects in Bosnia and Herzegovina Mirza Dautbašić1,*, Osman Mujezinović1 1 Faculty of Forestry University in Sarajevo, Chair of Forest Protection, Urban Greenery and Wildlife and Hunting. Zagrebačka 20, 71000 Sarajevo * Corresponding author: [email protected] Abstract: An alien species – animal, plant or micro-organism – is one that has been introduced as a result of human activity to an area it could not have reached on its own. In cases where the foreign species expands in its new habitat, causing environmental and economic damage, then it is classified as invasive. The maturity of foreign species in the new area may also be influenced by climate changes. The detrimental effect of alien species is reflected in the reduction of biodiversity as well as plant vitality. A large number of alien species of insects are not harmful to plants in new habitats, but there are also those that cause catastrophic consequences to a significant extent. The aim of this paper is to present an overview of newly discovered species of insects in Bosnia and Herzegovina. The research area, for this work included forest and urban ecosystems in the territory of Bosnia and Herzegovina. For the purposes of this paper, an overview of the species found is provided: /HSWRJORVVXVRFFLGHQWDOLV Heidemann; (Hemiptera: Coreidae) - The western conifer seed bug, found at two sites in Central Bosnia, in 2013 and 2015; $UJHEHUEHULGLVSchrank; (Hymenoptera: Argidae) - The berberis sawfly, recorded in one locality (Central Bosnia), in 2015; -
76 ©Kreis Nürnberger Entomologen; Download Unter
ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Galathea, Berichte des Kreises Nürnberger Entomologen e.V. Jahr/Year: 1997 Band/Volume: 13 Autor(en)/Author(s): Dunk Klaus von der Artikel/Article: Ecological studies on Pipunculidae (Diptera) 61-76 ©Kreis Nürnberger Entomologen; download unter www.biologiezentrum.at galathea 13/2 Berichte des Kreises Nürnberger Entomologen1997 • S. 61 -76 Ecological studies on Pipunculidae (Diptera) K laus von der D unk Zusammenfassung: Es wird über Freilandbeobachtungen an Augenfliegen berich tet. Räumlich begrenzte Vorkommen erwiesen sich als erstaunlich artenreich. Sie werden im einzelnen vorgestellt, sowie eine bemerkenswerte Begleitfauna genannt. Betrachtungen von Verhaltensweisen runden das Bild ab, zeigen aber gleichzeitig die Notwendigkeit für weitere Studien. Abstract: Studies on Pipunculid flies in their natural environment are presented. Certain places are described, which proved to be astonishingly rieh in species. Some remarkable associating insect species are listed. As far as investigated comments on the behaviour of the adult flies are added. Key words: Diptera, Pipunculidae, behaviour, ecology Introduction Pipunculid flies are rather small mostly black insects, developing as parasitoids inside leafhoppers, with the ability of hovering (relationship to Syrphidae) and with enormous compound eyes, useful for males in search for females, and for females in search for a potential victim, a cicad larva. Most specimen of Pipunculidae studied so far were collected by Malaise traps. This material allows to describe the existing species, to secure their systematical stand, and to mark their distribution. Many questions in this chapter are still open. On the other hand the development as parasitoids in leafhoppers show fascinating aspects of adaptations to this life and even has an ecological/economical content regarding pest control. -
The Hymenoptera of a Dry Meadow on Limestone
POLISH JOURNAL OF ECOLOGY 47 1 29--47 1999 (Pol. J. Ecol.) W em er ULRICH Nicholas Copemicus University in Torun Department of Animal Ecology 87-100 Torun. Gagarina 9: Poland e-mail: ulrichw @ cc.uni.torun.pl 'I'HE HYMENOPTERA OF A DRY MEADOW ON LIMESTONE: SPECIES COMPOSITION, ABUNDANCE AND BIOMASS ABSTRACT: In 1986 and 1988 the hymenopterous fauna of a semixerophytic meadow on lime stone near Gottingen (FRG) was studied using ground-photo-eclectors. A total of 4982 specimens be longing to 475 different species \vere collected. Extrapolations from double-log functions revealed that there may be as many as 1330 parasitoid species present per year. 455 of the 475 species were parasito ids. 155 of them attack dipterans. 48 lepidopterans. 36 beetles. 23 wasps, 22 plant hoppers and 13 ap hids. 47 of the species are egg-parasitoids and parasitoids of miners. ectophytophages count for 44 of 2 the \V asp species. The abundance of the wasp fauna was rather high ( 1120 ± 53 in d. m- a- I ( 1986) and 2 1 335 ± 42 ind. m - a- ( 1988). Most abundant were the parasitoids of miners, gall-makers and the egg parasitoids. Compared \vith the high abundance the biomass was low. In 1986 the wasps weighed a total 2 1 2 1 of 194 ± 24 n1gDW m- a- and in 1988 only 69 ± 20 mgDW m- a- . The parasitoids of ectophytopha gous lepidopterans and coleopterans counted for n1ore than half of the whole biomass. KEY WORDS: Hymenoptera. parasitoids. faunal composition, density, biomass. species numbers, local extinction. 1. INTRODUCTION The insect order Hymenoptera is the species is very limited. -
Hymenoptera: Tenthredinidae) 405-417 © Biologiezentrum Linz/Austria; Download Unter
ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Linzer biologische Beiträge Jahr/Year: 2003 Band/Volume: 0035_1 Autor(en)/Author(s): Altenhofer Ewald, Pschorn-Walcher Hubert Artikel/Article: Biologische Notizen über die Blattwespen-Gattungen Metallus FORBES, Monostegia A. COSTA und Phymatocera DAHLBOM (Hymenoptera: Tenthredinidae) 405-417 © Biologiezentrum Linz/Austria; download unter www.biologiezentrum.at Linzer biol. Beitr. 35/1 405-417 30.6.2003 Biologische Notizen über die Blattwespen-Gattungen Metallus FORBES, Monostegia A. COSTA und Phymatocera DAHLBOM (Hymenoptera: Tenthredinidae) E. ALTENHOFER & H. PSCHORN-WALCHER Abstract: Larval collections and rearings have been made of the European species of the sawfly genera Metallus, Monostegia, and Phymatocera. The biology of Metallus albipes, a leaf-miner specialized on raspberries, is described in some detail. M. pumilus has been reared mainly from dewberries (Rubus caesius), less often from rock bramble (R. saxatilis), but has rarely been found on blackberries (R. fruticosus agg.). M. lanceolatus, mining the leaves of wood avens (Geum urbanum), is also briefly dealt with. The larvae of these leaf-miners are described and a total of 11 species of parasitoids have been reared from them, including 3 highly specific Ichneumonid species of the genera Lathrolestes and Grypocentrus. Monostegia nigra, an entirely black sawfly species separated from M. abdominalis by TAEGER (1987), has been reared from Lysimachia punctata in gardens. In contrast to M. abdominalis, frequently reared also from L. vulgaris (yellow loosestrife), M. nigra lays several eggs dispersed over a leaf (not in an oblong cluster) and the head capsule of the larvae is uniformly yellowish (not with a dark stripe on the vertex). -
New Data on the Sawfly Fauna of Corsica with the Description of a New Species Pontania Cyrnea Sp.N
ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Nachrichtenblatt der Bayerischen Entomologen Jahr/Year: 2005 Band/Volume: 054 Autor(en)/Author(s): Liston Andrew D., Späth Jochen Artikel/Article: New data on the sawfly fauna of Corsica with the description of a new species Pontania cyrnea sp.n. (Hymenoptera, Symphyta) 2-7 © Münchner Ent. Ges., download www.biologiezentrum.at NachrBl. bayer. Ent. 54 (1 /2), 2005 New data on the sawfly fauna of Corsica with the description of a new species Pontania cyrnea sp. n. (Hymenoptera, Symphyta) A. D. LISTON & J. SPÄTH Abstract Records of 38 taxa of Symphyta collected recently by the authors in Corsica are presented. 15 identified species are additions to the known Corsican fauna. Pontania cyrnea sp. n. is described and compared with the morphologically similar P. joergcnseni ENSLIN. The family Xyelidae is recorded for the first time on the island. A total of 71 symphytan species are now known from Corsica. Introduction CHEVIN (1999) published a list of 56 species of sawflies and other Symphyta (woodwasps, orus- sids) from Corsica. His paper is based mainly on material made available to him by specialists in other insect groups who have collected there. He also included data on specimens from Corsica in the Muséum national d'Histoire naturelle (Paris), and mentioned a few taxa already recorded in papers by other symphytologists. The island had previously been visited by a single sawfly specialist, who examined only the leaf-mining species (BUHR 1941). In spring 2004 the junior author stated his intent to collect Symphyta in Corsica. -
Bulletin of Zoological Nomenclature
\M RD IV WV The Bulletin of Zoological Nomenclature IGzjJxjThe Official Periodical of the International Commission on Zoological Nomenclature Volume 56, 1999 Published on behalf of the Commission by The International Trust for Zoological Nomenclature c/o The Natural History Museum Cromwell Road London, SW7 5BD, U.K. ISSN 0007-5167 '£' International Trust for Zoological Nomenclature Bulletin of Zoological Nomenclature 56(4) December 1999 I TABLE OF CONTENTS Page Notices 1 The International Commission on Zoological Nomenclature and its publications . 2 Addresses of members of the Commission 3 International Trust for Zoological Nomenclature 4 The International Code of Zoological Nomenclature 5 Towards Stability in the Names of Animals 5 General Article Recording and registration of new scientific names: a simulation of the mechanism proposed (but not adopted) for the International Code of Zoological Nomen- clature. P. Bouchet 6 Applications Eiulendriwn arbuscula Wright, 1859 (Cnidaria, Hydrozoa): proposed conservation of the specific name. A.C. Marques & W. Vervoort 16 AUGOCHLORiNi Moure. 1943 (Insecta. Hymenoptera): proposed precedence over oxYSTOGLOSSiNi Schrottky, 1909. M.S. Engel 19 Strongylogasier Dahlbom. 1835 (Insecta. Hymenoptera): proposed conservation by the designation of Teiuhredo muhifascuim Geoffroy in Fourcroy, 1785 as the type species. S.M. Blank, A. Taeger & T. Naito 23 Solowpsis inviclu Buren, 1972 (Insecta, Hymenoptera): proposed conservation of the specific name. S.O. Shattuck. S.D. Porter & D.P. Wojcik 27 NYMPHLILINAE Duponchel, [1845] (Insecta, Lepidoptera): proposed precedence over ACENTROPiNAE Stephens. 1835. M.A. Solis 31 Hemibagnis Bleeker, 1862 (Osteichthyes, Siluriformes): proposed stability of nomenclature by the designation of a single neotype for both Bagrus neimirus Valenciennes, 1840 and B. -
Prioritising the Management of Invasive Non-Native Species
PRIORITISING THE MANAGEMENT OF INVASIVE NON-NATIVE SPECIES Olaf Booy Thesis submitted to the School of Natural and Environmental Sciences in fulfilment for the requirements of the degree of Doctor of Philosophy Newcastle University October 2019 Abstract Invasive non-native species (INNS) are a global threat to economies and biodiversity. With large numbers of species and limited resources, their management must be carefully prioritised; yet agreed methods to support prioritisation are lacking. Here, methods to support prioritisation based on species impacts, pathways of introduction and management feasibility were developed and tested. Results provide, for the first time, a comprehensive list of INNS in Great Britain (GB) based on the severity of their biodiversity impacts. This revealed that established vertebrates, aquatic species and non-European species caused greater impacts than other groups. These high impact groups increased as a proportion of all non-native species over time; yet overall the proportion of INNS in GB decreased. This was likely the result of lag in the detection of impact, suggesting that GB is suffering from invasion debt. Testing methods for ranking the importance of introduction pathways showed that methods incorporating impact, uncertainty and temporal trend performed better than methods based on counts of all species. Eradicating new and emerging species is one of the most effective management responses; however, practical methods to prioritise species based both on their risk and the feasibility of their eradication are lacking. A novel risk management method was developed and applied in GB and the EU to identify not only priority species for eradication and contingency planning, but also prevention and long term management. -
Bees, Wasps & Ants
Sheringham and Beeston Regis Commons SSSI / SAC FAUNA: Hymenoptera INSECTA (Pterygota) Family/Order English Name. Scientific Name. Authority. Grid Ref. Tetrad/ Last Km sq. Common. Record. HYMENOPTERA. PAMPHILIDAE: Sawfly. Pamphilius inanitus (Villers, 1789) TG1642 1987? (Bees, Wasps and Ants) ARGIDAE: Elm Zig-zag Sawfly. Aproceros leucopoda Takeuchi, 1939 TG1642 14R/B 2020 Bramble Sawfly. Arge cyaneocrocea (Forster, 1771) TG1642 2016 Sawfly. Arge gracilicornis (Klug, 1814 ) TG1642 1987? CIMBICIDAE: Honeysuckle Sawfly. Abia lonicerae (Linnaeus) TG1641 14Q/B 2015 Club-horned Sawfly. Abia sericera (Linnaeus) TG1642 14R/B 2014 Club-horned Sawfly. Zaraea fasciata Linnaeus, 1758 TG1641/42 14R,14Q/B 2014 Birch Sawfly. Cimbex femoratus (Linnaeus, 1758) TG1642 14R/B 2017 SIRICIDAE: Greater Horntail Wasp. Urocerus gigas (Linnaeus, 1758) TG1642 14R/S 1992 CEPHIDAE: Sawfly. Calameuta pallipes (Klug, 1803) TG1642 1987? TENTHREDINIDAE: Willow Sawfly. Pontania proxima (Lepeletier, 1823) TG1642 14R/BS 2009 Willow Sawfly. Eupontania pedunculi (Hartig, 1837) TG1642 14R/B 1999 Willow Sawfly. Eupontainia viminalis (Linnaeus, 1758) TG1642 14R/B 2002 Willow Sawfly. Pontainia bridgemanii (Cameron, 1883) TG1642 14R/B 1999 Sawfly. Caliroa annulipes (Klug, 1816) TG1642 14R/S 2002 Hazel Sawfly. Craesus septentrionalis (Linnaeus, 1758) TG1641 14Q/B 2017 Sawfly. Blennocampa phyllocolpa Viitasaari & Vikberg, 1985 TG1642/41 14R,14Q/B 2003 Sawfly. Selandria serva (Fabricius, 1793) TG1642 14R/B 2013 Sawfly. Aneugmenus padi (Linnaeus, 1761) TG1642 1987? Bracken Sawfly. Strongylogaster multifasciata (Geoffroy, 1785) TG1642 14R/BS 2020 Sawfly. Dichrodolerus vestigialis (Klug, 1818) TG1642 1996 Sawfly. Dolerus germanicus (Fabricius, 1775) TG1642 1987? Sawfly. Eutomostethus ephippium (Panzer, 1798) TG1642 14R/BS 2020 Sawfly. Poodolerus aeneus Hartig, 1837 TG1642 1987? Sawfly. Dolerus brevitarus Hartig TG1642 1987? Sawfly. -
Sawflies (Hym.: Symphyta) of Hayk Mirzayans Insect Museum with Four
Journal of Entomological Society of Iran 2018, 37(4), 381404 ﻧﺎﻣﻪ اﻧﺠﻤﻦ ﺣﺸﺮهﺷﻨﺎﺳﯽ اﯾﺮان -404 381 ,(4)37 ,1396 Doi: 10.22117/jesi.2018.115354 Sawflies (Hym.: Symphyta) of Hayk Mirzayans Insect Museum with four new records for the fauna of Iran Mohammad Khayrandish1&* & Ebrahim Ebrahimi2 1- Department of Plant Protection, Faculty of Agriculture, Shahid Bahonar University, Kerman, Iran & 2- Insect Taxonomy Research Department, Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran 19395-1454, Iran. *Corresponding author, E-mail: [email protected] Abstract A total of 60 species of Symphyta were identified and listed from the Hayk Mirzayans Insect Museum, Iran, of which the species Abia candens Konow, 1887; Pristiphora appendiculata (Hartig, 1837); Macrophya chrysura (Klug, 1817) and Tenthredopsis nassata (Geoffroy, 1785) are newly recorded from Iran. Distribution data and host plants are here presented for 37 sawfly species. Key words: Symphyta, Tenthredinidae, Argidae, sawflies, Iran. زﻧﺒﻮرﻫﺎي ﺗﺨﻢرﯾﺰ ارهاي (Hym.: Symphyta) ﻣﻮﺟﻮد در ﻣﻮزه ﺣﺸﺮات ﻫﺎﯾﮏ ﻣﯿﺮزاﯾﺎﻧﺲ ﺑﺎ ﮔﺰارش ﭼﻬﺎر رﮐﻮرد ﺟﺪﯾﺪ ﺑﺮاي ﻓﻮن اﯾﺮان ﻣﺤﻤﺪ ﺧﯿﺮاﻧﺪﯾﺶ1و* و اﺑﺮاﻫﯿﻢ اﺑﺮاﻫﯿﻤﯽ2 1- ﮔﺮوه ﮔﯿﺎهﭘﺰﺷﮑﯽ، داﻧﺸﮑﺪه ﮐﺸﺎورزي، داﻧﺸﮕﺎه ﺷﻬﯿﺪ ﺑﺎﻫﻨﺮ، ﮐﺮﻣﺎن و 2- ﺑﺨﺶ ﺗﺤﻘﯿﻘﺎت ردهﺑﻨﺪي ﺣﺸﺮات، ﻣﺆﺳﺴﻪ ﺗﺤﻘﯿﻘﺎت ﮔﯿﺎهﭘﺰﺷﮑﯽ اﯾﺮان، ﺳﺎزﻣﺎن ﺗﺤﻘﯿﻘﺎت، ﺗﺮوﯾﺞ و آﻣﻮزش ﮐﺸﺎورزي، ﺗﻬﺮان. * ﻣﺴﺌﻮل ﻣﮑﺎﺗﺒﺎت، ﭘﺴﺖ اﻟﮑﺘﺮوﻧﯿﮑﯽ: [email protected] ﭼﮑﯿﺪه درﻣﺠﻤﻮع 60 ﮔﻮﻧﻪ از زﻧﺒﻮرﻫﺎي ﺗﺨﻢرﯾﺰ ارهاي از ﻣﻮزه ﺣﺸﺮات ﻫﺎﯾﮏ ﻣﯿﺮزاﯾﺎﻧﺲ، اﯾﺮان، ﺑﺮرﺳﯽ و ﺷﻨﺎﺳﺎﯾﯽ ﺷﺪﻧﺪ ﮐﻪ ﮔﻮﻧﻪﻫﺎي Macrophya chrysura ،Pristiphora appendiculata (Hartig, 1837) ،Abia candens Konow, 1887 (Klug, 1817) و (Tenthredopsis nassata (Geoffroy, 1785 ﺑﺮاي اوﻟﯿﻦ ﺑﺎر از اﯾﺮان ﮔﺰارش ﺷﺪهاﻧﺪ. اﻃﻼﻋﺎت ﻣﺮﺑﻮط ﺑﻪ ﭘﺮاﮐﻨﺶ و ﮔﯿﺎﻫﺎن ﻣﯿﺰﺑﺎن 37 ﮔﻮﻧﻪ از زﻧﺒﻮرﻫﺎي ﺗﺨﻢرﯾﺰ ارهاي اراﺋﻪ ﺷﺪه اﺳﺖ. -
Miniature Attachment Systems: Exploring Biological Design Principles
© 2002 WIT Press, Ashurst Lodge, Southampton, SO40 7AA, UK. All rights reserved. Web: www.witpress.com Email [email protected] Paper from: Design and Nature, CA Brebbia, L Sucharov & P Pascola (Editors). ISBN 1-85312-901-1 Miniature attachment systems: exploring biological design principles S.N. Gorb Biological Microtribology Group, Division 14 MPI of Developmental Biolop, Tuebingen, Germany. Abstract One of the greatest challenges for engineering science today is miniaturisation. Insects and other arthropods have solved many problems correlated with small size during their evolution. A variety of biomechanical systems of insects, adapted for attachment of parts of the body to each other or attaching the organism to a substrate, are the main topic of the present paper, There are eight fimdamental classes of attachment principles: clamp, spacer, sucker, expansion anchor, hooks, lock or snap, adhesive secretions, and friction. Different combinations of these principles occur in the majority of biological attachment structures. Friction-based probabilistic fasteners provide precise reversible coupling of surfaces with a minimum expenditure of force, Patent databases contain a huge number of ideas dealing with applications of existing fasteners. However, most of these applications use the same types of available hook-like tapes. Biological systems provide a variety of microscale surface patterns, which may serve as a source for Mure prototyping of novel types of releasable fasteners and micro-fasteners. An engineering approach is to copy the surface profile using available technologies. As an initial stage of prototyping diverse surface microsculpture, the low-viscosity wax cast technique is applied to produce surface casts, Since forces in the contact areas of most biological systems have not been previously measured, the fust step in this direction is taken toward identification of the interesting properties of systems.