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Host pla.t selection of Chrysolina.cla.hra.a.（Coleoptera. Chrysomelida.） from Mpuma.a.ga. South a.rica

Insect Science 2009年第1期16卷 81-88页

作者： Robert S. Boyd Michea. a. Da.is michael a. wall Kevin Ba.kwill Depa.tment of Biologica. Sciences Auburn University Auburn Alabama Depa.tment of Biologica. Sciences University of Southern Mississippi Hattiesburg Mississippi Entomology Depa.tment San Diego Natural History Museum San Diego California USA C.E. Moss Herba.ium School of Animal and Plant Sciences University of the Witwatersrand Private Bag 3 WITS 2050 Johannesburg South Africa

Hypera.cumula.ed elements such a. Ni ma. defend pla.ts a.a.nst some na.ura. enemies wherea. other enemies ma. circumvent this defense. The Ni hypera.cumula.or Berkheya.coddii Roessler （a.tera.ea.） is a.host pla.t species for Chrysolina.cla.hra.a.（Cla.k）, which suffers no a.pa.ent ha.m by consuming its lea. tissue. Beetle specimens collected from B. coddii ha. a.whole body Ni concentra.ion of 260μg/g dry weight, despite consuming lea. ma.eria. conta.ning 15 100μg Ni/g. Two experiments were conducted with a.ults of this beetle species： a.no-choice experiment a.d a.choice experiment. In the nochoice experiment we offered beetles folia.e of one of four speeies ofBerkheya. B. coddii, B. rehma.nii Thell. va.. rogersia.a.Thell., B. echina.ea.（Ha.v.） O. Hoffm. ex Burtt Da.ey, a.d B. insignis （Ha.v.） Thell. The two former species a.e Ni hypera.cumula.ors （defined a. ha.ing lea.Ni concentra.ion 〉 1 000 μg/g） wherea. the la.ter ha.e low Ni levels （〈 200 μg/g） in their lea.es. Ma.ses of beetles were monitored for 6 da.s. Choice experiments used growing stem tips from the sa.e Berkheya.species, pla.ed into Petri dishes with five Chrysolina.beetles in ea.h, a.d the a.ount of feeding da.a.e ca.sed on ea.h of the four species wa. recorded. Beetles in the no-choice experiment ga.ned ma.s when offered B. coddii, ma.nta.ned ma.s on lea.es of the other Ni hypera.cumula.or （B. rehma.nii va.. rogersia.a., a.d lost ma.s when offered non-hypera.cumula.or lea.es. In the choice test, beetles strongly preferred B. coddii to other Berkheya.species. We conclude tha. C. cla.hra.a.ma. be host-specific on B. coddii.

关键词： Berkheya.coddii bioa.cumula.ion hea.y meta.s host pla.t specia.ist nickel

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Host-herbivore studies of Stenoscepa.sp. （Orthoptera.Pyrgomorphida.）, a.high-Ni herbivore of the South a.rica. Ni hypera.cumula.or Berkheya.coddii （a.tera.ea.）

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Insect Science 2007年第2期14卷 133-143页

作者： ROBERT S. BOYD MICHEa. a. Da.IS michael a. wall KEVIN Ba.KWILL Depa.tment of Biologica. Sciences Auburn University Auburn Alabama University of the Witwatersrand Johannesburg South Africa Depa.tment of Biologica. Sciences University of Southern Mississippi Hattiesburg MS University of the Witwatersrand Johannesburg South Africa Entomology Depa.tment San Diego Natural History Museum San Diego California USA C.E. Moss Herba.ium School of Animal and Plant Sciences University of the Witwatersrand Johannesburg South Africa

Nymphs of Stenoscepa.sp. feed on lea.es of the Ni hypera.cumula.or Berkheya.coddii a. serpentine sites in Mpuma.a.ga.Province, South a.rica. These sites conta.n Ni hypera.cumula.ors, Ni a.cumula.ors, a.d pla.ts with Ni concentra.ions in the norma. ra.ge. We conducted studies to：（i） determine the whole-body meta. concentra.ion of nymphs （including those sta.ved to empty their guts）; （ii） compa.e Stenoscepa.sp. nymphs a.a.nst other gra.shoppers in the sa.e ha.ita. for whole-body meta. concentra.ions; a.d （iii）compa.e the suita.ility of Ni hypera.cumula.or a.d Ni a.cumula.or pla.ts a. food sources for Stenoscepa.sp. a.d other gra.shoppers. Stenoscepa.nymphs ha. extremely high whole-body Ni concentra.ions （3 500μg Ni/g）. This wa. pa.tly due to food in the gut, a. sta.ved insects conta.ned less Ni （950 pg Ni/g）. Stenoscepa.nymphs survived significa.tly better tha. other gra.shoppers collected from either a.serpentine or a.non-serpentine site when offered high-Ni pla.ts a. food. In a.host preference test a.ong four Berkheya.species （two Ni hypera.cumula.ors a.d two Ni a.cumula.ors）, Stenoscepa.sp, preferred lea.es of the Ni hypera.cumula.or species. a.preference experiment using lea.es of three Senecio species （of which one species, Senecio corona.us, wa. represented by both a.Ni hypera.cumula.or a.d a.Ni a.cumula.or popula.ion） showed tha. Stenoscepa.sp. preferred Ni a.cumula.or Senecio corona.us lea.es to a.l other choices. We conclude tha. Stenoscepa.sp. is extremely Ni-tolera.t. Stenoscepa.sp. nymphs prefer lea.es of hypera.cumula.or Berkheya.species, but eleva.ed Ni concentra.ion a.one does not determine their food preference. We suggest tha. the extremely high whole-body Ni concentra.ion of Stenoscepa.nymphs ma. a.fect food web rela.ionships in these serpentine communities.

关键词： Berkheya.coddii bioma.nifica.ion food webs hea.y meta.s hypera.cumula.ion,South a.rica

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Nickel levels in a.thropods a.socia.ed with Ni hypera.cumula.or pla.ts from a. ultra.a.ic site in New Ca.edonia

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Insect Science 2006年第4期13卷 271-277页

作者： ROBERT S. BOYD michael a. wall Ta.GUY Ja.FRE Depa.tment of Biologica. Sciences Auburn University Auburn Alabama USA Entomology Depa.tment San Diego Natural History Museum San Diego California USA La.ora.oire de Bota.ique et d'Ecologie Végéta.e a.pliquées IRD - Institut de recherche pour le développement Centre de Nouméa Nouméa New Caledonia

a.thropods （ma.nly insects） were collected from a.forest site tha. conta.ned a. lea.t six species of Ni hypera.cumula.ors. Whole body Ni a.a.ysis wa. performed for 12 a.thropod ta.a. two of which were studied a. different life cycle sta.es. We found two Nitolera.t insects. The penta.omid heteroptera. Uta.a.viridipuncta. feeding on fruits of the Ni hypera.cumula.or Hyba.thus a.stroca.edonicus, conta.ned a.mea. of 2 600 μg Ni/g in nymphs a.d 750μg Ni/g in a.ults. The tephritid fly Ba.trocera.psidii, feeding on pulp of Sebertia.a.umina.a.fruits tha. conta.ned 6 900μg Ni/g, conta.ned 420μg Ni/g a. la.va. tha. ha. eva.ua.ed their guts a.d significa.tly less （65μg Ni/g） a. a.ults. Europea. honeybees （a.is mellifera. visiting flowers of the Ni hypera.cumula.or H. a.stroca.edonicus conta.ned significa.tly more Ni （8-fold more） tha. those collected from flowers of Myodoca.pus fra.inifolius, a.non-hypera.cumula.or. Our results show tha. some insects feed on Ni hypera.cumula.or pla.ts a.d tha. their feeding mobilizes Ni into loca. food webs.

关键词： bioma.nifica.ion food web hea.y meta. herbivory hypera.cumula.ion meta. tolera.ce

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Meta. concentra.ions of insects a.socia.ed with the South a.rica. Ni hypera.cumula.or Berkheya.coddii （a.tera.ea.）

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Insect Science 2006年第2期13卷 85-102页

作者： ROBERT S. BOYD MICHEa. a. Da.IS michael a. wall KEVIN Ba.KWILL Depa.tment of Biologica. Sciences Auburn University Auburn Depa.tment of Biologica. Sciences University of Southern Mississippi Hattiesburg Entomology Depa.tment San Diego Natural History Museum San Diego USA C.E. Moss Herba.ium School of Animal and Plant Sciences University of the Witwatersrand South Africa

The high levels of some meta.s in meta. hypera.cumula.or pla.ts ma. be tra.sferred to insect a.socia.es. We surveyed insects collected from the South a.rica. Ni hypera.cumula.or Berkheya.coddii to document whole-body meta. concentra.ions （Co, Cr, Cu, Mg, Mn, Ni, Pb, Zn）. We a.so documented the concentra.ions of these meta.s in lea.es, stems a.d inflorescences, finding extremely eleva.ed levels of Ni （4 700-16 000μg/g） a.d high va.ues （5-34μg/g） for Co, Cr, a.d Pb. Of 26 insect morphotypes collected from B. coddii, seven heteroptera.s, one coleoptera., a.d one orthoptera. conta.ned rela.ively high concentra.ions of Ni （〉 500μg/g）. The la.ge number of high-Ni heteroptera.s a.ds to discoveries of others （from Ca.ifornia.USa.a.d New Ca.edonia. a.d suggests tha. members of this insect order ma. be pa.ticula.ly Ni tolera.t. Nymphs of the orthoptera. （Stenoscepa. conta.ned 3 500 μg Ni/g, the grea.est Ni concentra.ion yet reported for a. insect. We a.so found two beetles with eleva.ed levels of Mg （〉 2 800 μg/g）, one beetle with eleva.ed Cu （〉 70 μg/g） a.d one heteroptera. with a. eleva.ed level of Mn （〉 200 μg/g）. Our results show tha. insects feeding on a.Ni hypera.cumula.or ca. mobilize Ni into food webs, a.though we found no evidence of Ni bioma.nifica.ion in either herbivore or ca.nivore insect ta.a. We a.so conclude tha. some insects a.socia.ed with hypera.cumula.ors ca. conta.n Ni levels tha. a.e high enough to be toxic to vertebra.es.

关键词： Berkheya.coddii bioma.nifica.ion food webs hea.y meta.s hypera.cumula.ion,South a.rica

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Like a.G6-na.:tra.scriptiona. control of G-protein coupled receptors during oligodendroglia. development

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Neura. Regenera.ion Resea.ch 2025年第7期20卷 2001-2002页

作者： Tim a.erle michael Wegner Institut für Biochemie Friedrich-Alexander-Universität Erlangen-NürnbergErlangenGermany

Multila.ered control of myelina.ion:Quick,sa.ta.ory conduction of a.tion potentia.s a.ong nerve fibers requires the electrica. insula.ion of a.ons by myelina.ing *** the centra. nervous system,this role is ta.en up by *** a.e ma.ked by the expression of the linea.e determina.ts Sox10 a.d Olig2 a.d a.ise from oligodendrocyte precursor cells(OPCs)during embryona. *** the ma.ority of OPCs differentia.e into ma.ure oligodendrocytes when nea.by a.ona. segments require myelina.ion,a.sma.l subpopula.ion of OPCs persist a. a.progenitor ***,the timing of myelina.ion a.d ma.ntena.ce of the OPC pool both need to be precisely *** tra.scription fa.tors either positively or nega.ively a.fect oligodendrocyte differentia.ion a.d ma.ntena.ce of the OPC pool a. components of a.complex gene regula.ory network(reviewed in Sock a.d Wegner,2021).Network a.tivity is a.ditiona.ly influenced by extra.ellula. signa.ing molecules tha. bind to receptors on the oligodendroglia. cell surfa.e a.d a.tiva.e intra.ellula. signa.ing *** the receptors a.e linked to the network is poorly understood so fa.,but pivota. to understa.ding the overa.l regula.ion of centra. nervous system(CNS)myelina.ion in response to environmenta. *** insights were recently ga.ned for Gpr37(Schmidt et a..,2024),a.G-protein coupled receptor(GPCR)with known releva.ce in differentia.ing oligodendrocytes(Ya.g et a.,2016).

关键词： ga.ned insula.ion conduction

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Emerging structures a.d dyna.ic mecha.isms ofγ-secreta.e for a.zheimer’s disea.e

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Neura. Regenera.ion Resea.ch 2025年第1期20卷 174-180页

作者： Yinglong Mia. michael S.Wolfe Computa.iona. Medicine Progra. a.d Depa.tment of Pha.ma.ology University of North Carolina–Chapel HillChapel HillNCUSA Depa.tment of Medicina. Chemistry University of KansasLawrenceKSUSA

γ-Secreta.e,ca.led“the protea.ome of the membra.e,”is a.membra.e-embedded protea.e complex tha. clea.es 150+peptide substra.es with centra. roles in biology a.d medicine,including a.yloid precursor protein a.d the Notch fa.ily of cell-surfa.e *** inγ-secreta.e a.d a.yloid precursor protein lea. to ea.ly-onset fa.ilia. a.zheimer’s disea.e.γ-Secreta.e ha. thus served a. a.critica. drug ta.get for trea.ing fa.ilia. a.zheimer’s disea.e a.d the more common la.e-onset a.zheimer’s disea.e a. ***,critica. ga.s rema.n in understa.ding the mecha.isms of processive proteolysis of substra.es,the effects of fa.ilia. a.zheimer’s disea.e muta.ions,a.d a.losteric modula.ion of substra.e clea.a.e byγ-*** this review,we focus on recent studies of structura. dyna.ic mecha.isms ofγ-*** mecha.isms,including the“Fit-Sta.-Trim,”“Sliding-Unwinding,”a.d“Tilting-Unwinding,”ha.e been proposed for substra.e proteolysis of a.yloid precursor protein byγ-secreta.e ba.ed on a.l-a.om molecula. dyna.ics *** a. incorrect registry of the Notch1 substra.e wa. identified in the cryo-electron microscopy structure of Notch1-boundγ-secreta.e,molecula. dyna.ics simula.ions on a.resolved model of Notch1-boundγ-secreta.e tha. wa. reconstructed using the a.yloid precursor protein-boundγ-secreta.e a. a.templa.e successfully ca.turedγ-secreta.e a.tiva.ion for proper clea.a.es of both wildtype a.d muta.t Notch,being consistent with biochemica. experimenta. *** a.proa.h could be potentia.ly a.plied to decipher the processing mecha.isms of va.ious substra.es byγ-*** a.dition,controversy over the effects of fa.ilia. a.zheimer’s disea.e muta.ions,pa.ticula.ly the issue of whether they sta.ilize or desta.ilizeγ-secreta.e-substra.e complexes,is ***,a. outlook is provided for future studies ofγ-secreta.e,including pa.hwa.s of substra.e binding a.d product relea.e,effects of modula.ors on fa.ilia. a.zheimer’s disea.e muta.ions

关键词： a.zheimer’s disea.e a.yloid precursor protein cryo-EM structures drug design intra.embra.e proteolysis molecula. dyna.ics Notch

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NECa. fa.ily of neurona. ca.cium-binding proteins in hea.th a.d disea.e

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Neura. Regenera.ion Resea.ch 2025年第5期20卷 1236-1243页

作者： Diones Bueno michael K.E.Scha.er Sudena.Wa.g michael J.Schmeisser a.el Methner Institute for Molecula. Medicine University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Depa.tment of a.esthesiology University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Institute of a.a.omy University Medical Center of the Johannes Gutenberg-UniversityMainzGermany

The N-termina. EF-ha.d ca.cium-binding proteins 1–3(NECa.1–3) constitute a.fa.ily of predomina.tly neurona. proteins cha.a.terized by the presence of a. lea.t one EF-ha.d ca.cium-binding doma.n a.d a.functiona.ly less well cha.a.terized C-termina. a.tibiotic biosynthesis monooxygena.e doma.n. a.l three fa.ily members were initia.ly discovered due to their intera.tions with other proteins. NECa.1 a.socia.es with syna.tota.min-1, a.critica. neurona. protein involved in membra.e tra.ficking a.d syna.tic vesicle exocytosis. NECa.2 intera.ts with predomina.tly stria.a. G-protein-coupled receptors, while NECa.3 pa.tners with a.yloid-β a. precursor protein-binding fa.ily a.members 2 a.d 3, key regula.ors of a.yloid-β production. This demonstra.es the ca.a.ity of the fa.ily for intera.tions with va.ious cla.ses of proteins. NECa. proteins exhibit distinct subcellula. loca.iza.ions: NECa.1 is found in the nucleus a.d cytosol, NECa.2 resides in endosomes a.d the pla.ma.membra.e, a.d NECa.3 is present in the endopla.mic reticulum a.d Golgi a.pa.a.us. The a.tibiotic biosynthesis monooxygena.e doma.n, a. evolutiona.ily a.cient component, is a.in to a.ypica. heme oxygena.es in proka.yotes but is not wellcha.a.terized in vertebra.es. Proka.yotic a.tibiotic biosynthesis monooxygena.e doma.ns typica.ly form dimers, suggesting tha. ca.cium-media.ed conforma.iona. cha.ges in NECa. proteins ma. induce a.tibiotic biosynthesis monooxygena.e doma.n dimeriza.ion, potentia.ly a.tiva.ing some enzyma.ic properties. However, the substra.e for this enzyma.ic a.tivity rema.ns uncerta.n. a.terna.ively, ca.cium-media.ed conforma.iona. cha.ges might influence protein intera.tions or the subcellula. loca.iza.ion of NECa. proteins by controlling the a.a.la.ility of protein–protein intera.tion doma.ns situa.ed between the EF ha.ds a.d the a.tibiotic biosynthesis monooxygena.e doma.n. This review summa.izes wha. is known a.out genomic orga.iza.ion, tissue expression, intra.ellula. loca.iza.ion, intera.

关键词： ca.cium EF ha.d mitochondria nervous system signa. tra.sduction

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Sma.l extra.ellula. vesicles derived from cerebra. endothelia. cells with eleva.ed microRNa.27a.promote ischemic stroke recovery

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Neura. Regenera.ion Resea.ch 2025年第1期20卷 224-233页

作者： Yi Zha.g Zhongwu Liu michael Chopp michael Millma. Ya.feng Li Pa.qua.e Ceppa.ulo a.y Kemper Cha. Li Li Zha.g Zheng Ga.g Zha.g Depa.tment of Neurology Henry Ford HospitalDetroitMIUSA Depa.tment of Physics Oakland UniversityRochesterMIUSA Depa.tment of Pa.hology Henry Ford HospitalDetroitMIUSA Division of Pha.ma.ology Department of NeuroscienceReproductive and Dentistry SciencesSchool of MedicineUniversity of Naples“Federico Ⅱ”NaplesItaly

a.ona. remodeling is a.critica. a.pect of ischemic bra.n repa.r processes a.d contributes to sponta.eous functiona. *** previous in vitro study demonstra.ed tha. exosomes/sma.l extra.ellula. vesicles(sEVs)isola.ed from cerebra. endothelia. cells(CEC-sEVs)of ischemic bra.n promote a.ona. growth of embryonic cortica. neurons a.d tha. microRNa.27a.miR-27a.is a. eleva.ed miRNa.in ischemic *** the present study,we investiga.ed whether norma. CEC-sEVs engineered to enrich their levels of miR-27a.27a.sEVs)further enha.ce a.ona. growth a.d improve neurologica. outcomes a.ter ischemic stroke when compa.ed with trea.ment with non-engineered CEC-sEVs.27a.sEVs were isola.ed from the conditioned medium of hea.thy mouse CECs tra.sfected with a.lentivira. miR-27a.expression *** EVs isola.ed from CECs tra.sfected with a.scra.ble vector(Scra.sEVs)were used a. a.*** ma.e mice were subjected to perma.ent middle cerebra. a.tery occlusion a.d then were ra.domly trea.ed with 27a.sEVs or *** a.ra. of beha.ior a.sa.s wa. used to mea.ure neurologica. *** with trea.ment of ischemic stroke with Scra.sEVs,trea.ment with 27a.sEVs significa.tly a.gmented a.ons a.d spines in the peri-infa.ct zone a.d in the corticospina. tra.t of the spina. grey ma.ter of the denerva.ed side,a.d significa.tly improved neurologica. *** vitro studies demonstra.ed tha. CEC-sEVs ca.rying reduced miR-27a.a.olished 27a.sEV-a.gmented a.ona. *** a.a.ysis revea.ed tha. 27a.sEVs systemica.ly a.ministered preferentia.ly loca.ized to the pre-syna.tic a.tive zone,while qua.tita.ive reverse tra.scription-polymera.e cha.n rea.tion a.d Western Blot a.a.ysis showed eleva.ed miR-27a.a.d reduced a.ona. inhibitory proteins Sema.horin 6a.a.d Ra. Homolog Fa.ily Member a.in the peri-infa.ct *** of the Cla.hrin-dependent endocytosis pa.hwa. substa.tia.ly reduced neurona. interna.iza.ion of *** da.a.provide evidence tha. 27a.sEVs ha.e

关键词： a.ona. remodeling cerebra. endothelia. cells exosomes miR-27a mitochondria Sema.horin 6A sma.l extra.ellula. vesicles stroke

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a.ute a.d chronic excitotoxicity in ischemic stroke a.d la.e-onset a.zheimer's disea.e

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Neura. Regenera.ion Resea.ch 2025年第7期20卷 1981-1988页

作者： Sha. Ping Yu Emily Choi michael QJia.g Ling Wei Depa.tment of a.esthesiology Emory University School of MedicineAtlantaGAUSA Center for Visua. a.d Neurocognitive Reha.ilita.ion Atlanta Veterans Affairs Medical CenterDecaturGAUSA

Stroke a.d a.zheimer's disea.e a.e common neurologica. disorders a.d often occur in the sa.e *** comorbidity of the two neurologica. disorders represents a.gra.e hea.th threa. to older *** review presents a.brief ba.kground of the development of novel concepts a.d their clinica. *** a.tivity of gluta.a.ergic N-methyl-D-a.pa.ta.e receptors a.d N-methyl-D-a.pa.ta.e receptor-media.ed Ca.(2+)influx is critica. for neurona. *** ischemic insult induces prompt a.d excessive gluta.a.e relea.e a.d dra.tic increa.es of intra.ellula. Ca.(2+)ma.nly via.N-methyl-D-a.pa.ta.e receptors,pa.ticula.ly of those a. the extra.yna.tic *** Ca.(2+)-evoked neurona. cell dea.h in the ischemic core is domina.ed by necrosis within a.few hours a.d da.s known a. a.ute ***,mild but susta.ned Ca.(2+)increa.es under neurodegenera.ive conditions such a. in the dista.t penumbra.of the ischemic bra.n a.d ea.ly sta.es of a.zheimer's disea.e a.e not immedia.ely toxic,but gra.ua.ly set off deteriora.ing Ca.(2+)-dependent signa.s a.d neurona. cell loss mostly beca.se of a.tiva.ion of progra.med cell dea.h *** on the Ca.(2+)hypothesis of a.zheimer's disea.e a.d recent a.va.ces,this Ca.(2+)-a.tiva.ed“silent”degenera.ive excitotoxicity evolves from yea.s to deca.es a.d is recognized a. a.unique slow a.d chronic *** N-methyl-D-a.pa.ta.e receptor subunit GluN3a.prima.ily a. the extra.yna.tic site,serves a. a.ga.ekeeper for the N-methyl-D-a.pa.ta.e receptor a.tivity a.d is neuroprotective a.a.nst both a.ute a.d chronic *** stroke a.d a.zheimer's disea.e,therefore,sha.e a. N-methyl-D-a.pa.ta.e receptor-a.d Ca.(2+)-media.ed mecha.ism,a.though with much different time *** is thus proposed tha. ea.ly interventions to control Ca.(2+)homeosta.is a. the preclinica. sta.e a.e pivota. for individua.s who a.e susceptible to spora.ic la.e-onset a.zheimer's disea.e a.d a.zheimer's disea.e-rela.ed

关键词： Ca.(2+)hypothesis cognitive deficits hypera.tivity la.e-onset a.zheimer's disea.e neurodegenera.ion N-methyl-D-a.pa.ta.e receptors N-methyl-D-a.pa.ta.e receptor subunits pa.hogenesis preventive trea.ment

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Ecology a.d Beha.iour of Burton's Legless Liza.d(Lia.is burtonis,Pygopodida.) in Tropica. a.stra.ia

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a.ia. Herpetologica. Resea.ch 2013年第1期4卷 9-21页

作者： michael wall Richa.d SHINE School of Biologica. Sciences a.8 University of Sydney

The elonga.e, functiona.ly limbless fla.-footed liza.ds （fa.ily Pygopodida.） a.e found throughout a.stra.ia. ra.ging into southern New Guinea. Despite their diversity a.d a.unda.ce in most a.stra.ia. ecosystems, pygopodids ha.e a.tra.ted little scientific study. a. intensive ecologica. study of one pygopodid, Burton＇s legless liza.d （Lia.is burtonis Gra. 1835）, wa. conducted in a.stra.ia.s tropica. Northern Territory. L. burtonis ea.s nothing but other liza.ds, prima.ily skinks, a.d a.pea.s to feed rela.ively infrequently （only 20.8% of stoma.hs conta.ned prey）. Ovula.ion a.d ma.ing occur chiefly in the la.e dry-sea.on （beginning a.ound September）, a.d most egg-la.ing ta.es pla.e in the ea.ly to middle wet-sea.on （November-Ja.ua.y）. Fema.es ca. la. multiple clutches per yea., some of which ma. be fertilised with stored sperm. Free-ra.ging L. burtonis a.e sedenta.y a.bush fora.ers, with ra.io-tra.ked liza.ds moving on a.era.e 〈 5 m/da.. Most fora.ing is done diurna.ly, but liza.ds ma. be a.tive a. a.y time of da. or night. Ra.iotra.ked liza.ds were usua.ly found in lea.-litter microha.ita.s, a.preference tha. wa. a.so evident in ha.ita.-choice experiments using field enclosures. Liza.ds typica.ly buried themselves in 6-8 cm of litter; a. this depth, they detect potentia. prey items while sta.ing hidden from preda.ors a.d prey a.d a.oiding letha.ly high tempera.ures.

关键词： Squa.a.a ha.ita. use wet-dry tropics thermoregula.ion movement a.tivity pa.terns

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