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Articles 1981 - 2010 of 2200
Full-Text Articles in Zoology
Online Dictionary Of Invertebrate Zoology: N, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Online Dictionary Of Invertebrate Zoology: N, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Armand R. Maggenti Online Dictionary of Invertebrate Zoology
nacre nacreous naiad nail naked nanism nanoid nanitic worker nanometer nanoplankton nanozooid narcosis nasale nascent naso Nassanoff's gland Nassanov's gland Nassanov's gland nasus nasute natal natality rate natant natatory natatory lamellae nates naticid naticiform native natural classification artificial classification natural decrease natural increase natural group natural increase natural requeening supersedure natural selection naupliar eye nauplius eye naupliiform nauplius eye nauplius larva nautilicone nautiliform nautiloid nautiloid navicular neala neallotype neanic neap Nearctic neascus larva nebulous neck neck organ nuchal organ necrobiosis necrocytosis necrophagous necrophoresis necrophoric behavior necrosis necrotize nectar nectobenthic nectocalyx nectophore nectochaeta larva necton nekton nectophore pneumatophore nectopod nectosome nectozooid …
Online Dictionary Of Invertebrate Zoology: L, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Online Dictionary Of Invertebrate Zoology: L, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Armand R. Maggenti Online Dictionary of Invertebrate Zoology
labella labellum labellar abductor apodeme labellar basal sclerites labellar mesial sclerite labellar sclerite labellum labial labial area labial disc labial glands labial gutter premental gutter labial kidneys labial nephridia labial lumen premental gutter labial mask labial nephridia labial palp/palpus palpi maxillary palp labial plate labial stipes labiostipes labial suture labial veil oral lappets labiate labidophorous labiella labiellum labile labiostipes labis socii labium bia inner lip labral labropalatum clypeopala¬tum labrum labra labrum-epipharynx lac lacerated lacinia lacinea laciniae lacinia mandibulae lacinia mobilis lacinia mobilis laciniate lacteous lactescent lactic acid lacuna ae lacunar system lacunose lacustrine laeotorma ae laeotropic lagena utriculus Lamarckism lamella …
Online Dictionary Of Invertebrate Zoology: M, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Online Dictionary Of Invertebrate Zoology: M, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Armand R. Maggenti Online Dictionary of Invertebrate Zoology
macerate machopolyp machozooid macraner macrergate macrobiota macrocephalic macrocercous macrochaetae macrocilia macrocnemes macrocyte macroesthetes macroevolution macrofauna macrogamete macrogametocyte macrogamy macrogenesis macrogyne macroic macrolecithal macromere macromesentery macromitosome macromolecule macromutation macronotal macronucleocyte macrophage macrophthalmic macroplankton macropore macropseudogyne macropterous macrosclere macroscopic macroseptum macrosiphon macrosymbiont macrotaxonomy macrotrichia macrotype macrurous maculate madrepore madreporic madreporite malacoid malacology malacophilous malapophysis male male-cell malella malleate malleations malleolus malleoramate malleus malli Malpighian maltha mamelon mammillate manca manchette mancoid mandible mandibular Mandibulata mandibulate manducate manica maniform manitruncus manna manometabola mantle manubrium manuscript marble margaritaceous marginalia marginate marine marita marker marmorate marsh marsupium masked mass mastax mastication masticomorphic mastidion mastigobranch mastigobranchia mastigophore …
Online Dictionary Of Invertebrate Zoology: I J K, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Online Dictionary Of Invertebrate Zoology: I J K, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Armand R. Maggenti Online Dictionary of Invertebrate Zoology
I-band I-cells ichnotaxon ichthyophagous iconotype icotype ICZN ideotype idiobiology idiochromatin idiochromosome idiocuticular idiogamy idiogram idiomorphic idionymous idionymy idioplasm idiosoma idiosome idiosphaerotheca idiotaxonomy idiotaxy idiotrichy idiotype idorgan ileocecal ileum imaginal imagination imagine imago imagochrysalis imbricate imbrication immaculate immarginate immature immersed immunity immunogenic imperfect imperforate implex implicate impregnation impressed imprint impunctate inaequipartite inanition inappendiculate inarticulate inaxon inbreed inbreeding incased incertae incidence incidental incipient incised incisions incisor incisura incisure inclinate inclivous inclusion incomplete incrassate incremental incrustation incubation incubatory incudal incudate incudes incumbent incunabulum incurrent incurved incus indented indeterminate index indexes indigenous indigoid indirect inducer induction inductor inductura indumentum indurate indusium industrial inequal inequilateral …
Online Dictionary Of Invertebrate Zoology: P, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Online Dictionary Of Invertebrate Zoology: P, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Armand R. Maggenti Online Dictionary of Invertebrate Zoology
P-1 pachynema pachyodont pachytene paedogenesis paedomorphosis paedoparthenogenesis pagina pagiopodous palate palette palidium paliform palingenesis palintrope palisade pallial palliobranchial palliolum palliopedal pallioperitoneal pallium palmaria palmars Palmen's palmula palpation palpifer palpiger palpimacula palpus paludicole palule palus pandemic panduriform Pangaea pangamy pangenesis pan¬mictic panmixia panoistic panthalassic pantherine pantropical panzootic papilioform papilla pappus papula papulous parcidentate parecium parenchyma parenchymella parenchymula paria paries parietes parieto-basilar parivincular parocciput paronychium parsimony parthenapogamy parthenita parthenogenesis parthenote partite parturition paruterine parva parviconoid pastinum patabionts patagia patella pathogen pathogenesis pathognomonic pathology patocoles patronymic paturon paucispiral paunch Paurometabola Pauropoda paurostyle Pavan's Pawlowsky's paxilla Pearman's pecilonymy pecten pectunculate pectus pedalium pedamina peddler …
Online Dictionary Of Invertebrate Zoology: O, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Online Dictionary Of Invertebrate Zoology: O, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Armand R. Maggenti Online Dictionary of Invertebrate Zoology
obconical obcordate obese obimbricate obsite objective synonym oblanceolate oblate obligate facultative obligate parasite facultative parasite obligate symbiont facultative symbiont oblique oblique muscles oblique vein obliterate oblong oblong plates oblongum obovate obpyriform obscure obsite obimbricate obsolescence obsolete obtect obtected obtect pupa exarate pupa obturaculum obturator obtuse acute obtusilingues acutilin¬gues obumbrate obverse obverse side of colony obvolvent occasional species occipital occipital arch occipital carina occipital cilia ocular seta occipital condyles occipital foramen foramen magnum occipital ganglion occipitalia occipital margin occipital notch occipital suture occipital tentacle cirrus occiput occipital occludent margin occludent teeth occlusion plate occlusor occult oceanic zone ocellara ocellus ocellar basin …
Online Dictionary Of Invertebrate Zoology: H, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Online Dictionary Of Invertebrate Zoology: H, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Armand R. Maggenti Online Dictionary of Invertebrate Zoology
habitat habitude habroderes hackled haem haematodocha haemocoele haemocoelous haemocyte haemolymph haemolysis hae¬mopoietic haemostatic haemoxanthine haft hair haliotoid Haller's halmatometamorphosis halocline halophile halter halteres hamabiosis hamate hamatype hami hamiform hammock hampe hamula hamular hamulohalterae hamulus hamus Hancock's hapaloderes haplobiont haplo-diploidy haploid haplometrosis haplometrotic haploneme haploneural haplont haplophase haplosis haptolachus haptomeri haptomerum haptor Hardy-Weinberg harmonic harmosis harpago harpagones harpes harpoon hastate hastisetae hatching haustellate haustellum haustrulum Hautkorper Hayes' H-band head head-fans heart heautotype hectocotylus heel height heli helical helices helicocone heliophil heliophilic heliophilous heliophobic heliotaxis heliotropism helix helmet helminth helminthiasis helminthic Helminthology helocerous helotism helus hem hemal hemapoiesis hematacyte hematal hematocyte hematodocha …
Online Dictionary Of Invertebrate Zoology: U V, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Online Dictionary Of Invertebrate Zoology: U V, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Armand R. Maggenti Online Dictionary of Invertebrate Zoology
uliginose, uliginous ultradextral ultrasinistral ultrasonic ultrastructure umbel umbilical suture umbilicus umbilicate umbo umbones umbos beak umbonal umbonal angle umbonal cavity umbonal depression umbonal fold umbonal pole umbonal reflection umbonal region umbonal spine umbone umbo umboniform rotelliform umbonuloid umbo-veliger umbraculate umbraculiferous umbrella exumbrella subumbrella umbrella organ sensillum campaniformium unarmed unarticulate uncate unci uncus unciform uncinal plate radula uncinal seta uncinate uncinate mastax uncini uncinus uncus unci undate underbridge undifferentiated undose undulate ungual unguiculus unguiculi unguiculate unguis unguifer unguiferate unguiflexor unguiform unguis ungues ungual uguiculus homodactyl unguitractor unguitractor tendon ungula unguis uniauriculate unibranchiate unicameral unicapsular unicarinate unicellular uniciliate unicolonial unicolorate unicornous unicuspid …
Online Dictionary Of Invertebrate Zoology: Q R, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Online Dictionary Of Invertebrate Zoology: Q R, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Armand R. Maggenti Online Dictionary of Invertebrate Zoology
Q-technique quacking quadrangle quadrat quadrate plates quadricapsular quadricolumella columella quadridentate quadrifid quadrilateral quadrimaculate quadripartite quadripinnate quadriprostatic quadriradiate quadrithecal quadrivalve quartet tetrad quasisocial queen queen control queen substance Quenstedt muscles quick muscle phasic muscle quiescence quiescent quincunx xes quincuncial quinone biochrome cochineal quinones quinquedentate quinquefarious quinquelocular race racemose racemose glands rachidian rhacidian rachiform rachiglossate rhachiglossate rachis rachides rachises radial radial radial apophysis radial cell radial gashes radial growth radial lirae carapace costae radial masses radial-medial cross vein radial muscles radial plates radial processes radial ribs radial sector radial skeleton radial symmmetry bilateral symmetry radial vein radianal plate radiate radiate radiate veins …
Online Dictionary Of Invertebrate Zoology: S, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Online Dictionary Of Invertebrate Zoology: S, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Armand R. Maggenti Online Dictionary of Invertebrate Zoology
sabulose sabulous sac saccate saccharobiose sacciform saccule saccus sacoglossa saddle Saefftigen's sagittae sagittocysts saliva salivarium salivary saltation Saltatoria saltatory saltigrade sanguinivorous sanidasters sapphirine saprobe saprobiont saprobiotic saprophagous saprophyte saprozite saprozoic saprozoite sarcobelum sarcode sarcolemma sarcolysis sarcomere sarcomeric sarcophagous sarcoplasm sarcoplasmic sarcosomes sarcostyle sarcotheca sarothrum saxicavous saxicolous scabellum scabrous scalariform scalaroid scalids scalpellum scalpriform scansorial scape scaphe scaphiform scaphium scaphocerite scaphognathite scaphoid Scaphopoda scapula scapus scarabaeiform scarabaeoid scarified scariose scatophagous scavenger scent sceptrules schemochrome schistosomula schizeckenosy schizocele schizochroal schizocoel schizodont schizogamy schizogenesis schizolophe schizopeltid schizopod schizorhyses Schmidt's Schwann scissorial scissure sclerification sclerite scleroblasts sclerocyte sclerophagous sclerosepta sclerotic scoleces scolecid scoleciform scolecoid …
Online Dictionary Of Invertebrate Zoology: T, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Online Dictionary Of Invertebrate Zoology: T, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Armand R. Maggenti Online Dictionary of Invertebrate Zoology
tabula tabular tachyauxesis tachyblastic tachygen tachygenesis tachytelic tactic tactile tactoreceptors taenia taeniate taenidium taenioglossate tagma tagmata tagmosis tail tailfan Takakura's talon talus tandem tangent tangoreceptor tanylobous tapetal tapetum tapinoma-odor Tardigrada tardigrades tarsal tarsation tarsite tarsomere tarsungulus tarsus taste tautonomy tautonym taxa taxes taxis taxis taxodont taxometrics taxon taxonomic taxonomist taxonomy tectiform tectostracum tectum teeth teges tegillum tegmen tegmentum tegula tegular tegulum tegumen tegument tegumentary tela telaform telamon telegonic teleiochrysalis telenchium teleoconch teleodont teleology teleotrocha telepod telescope telescopic teletrophic telioderma teliophan telmophage telocentric telodendria telofemur telogonic telolecithal telomitic telophase telophragma telopod telopodite telorhabdions telosonic telostome telosynapsis telosyndesis telotarsus telotaxis telotroch telson …
Online Dictionary Of Invertebrate Zoology: W X Y Z, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Online Dictionary Of Invertebrate Zoology: W X Y Z, Mary Ann Basinger Maggenti, Armand R. Maggenti, Scott L. Gardner
Armand R. Maggenti Online Dictionary of Invertebrate Zoology
Wagener's larva waggle dance walking leg pereopod wall warm-blooded homoiothermal warning coloration sematic aposematic pseudaposematic wart verruca tubercle water pore hydropore Waterston's organ water vascular system wax wax gland wax layer wax-plate wax scale web weighting Weismann's ring ring gland wheel organ white body Hensen's gland white cuticle yellow cuticle wholemount whorl width wild type wing ala winter egg summer egg With's organs workers worker jelly xanthic xanthophyll xanthopterin xanthopterine X-chromosomes xenagones xenic axenic polyxenic synxenic trix¬enic xenobiosis xenoecic xenogamy cross-fertilization xenogenesis heterogenesis xenomone allelochemic xenomorphism xenoparasite xerarch succession xeric xerophilous xerophobous xerosere lithosere hydrosere xerothermic fauna xiphidiocercaria microcotylate cer¬caria …
Immune-Endocrine Interactions In The Lizard Sceloporus Undulatus Hyacinthinus: Testing An Assumption Of The Immunocompetence Handicap Hypothesis, Mukta Chakraborty
Immune-Endocrine Interactions In The Lizard Sceloporus Undulatus Hyacinthinus: Testing An Assumption Of The Immunocompetence Handicap Hypothesis, Mukta Chakraborty
All-Inclusive List of Electronic Theses and Dissertations
The immunocompetence handicap hypothesis (IHH) was proposed by Folstad and Karter ( 1992) to describe the role of the endocrine system in ensuring honesty of sexual signaling. Numerous studies have investigated the assumptions of the IHH, but currently there is mixed evidential support in favor of the IHH. The first chapter of this thesis is a review examinining these studies, their limitations, and proposed alternative models and future directions. The second chapter of this thesis presents a study in which we experimentally assesss the testosterone immunosuppression assumption in adult male Sceloporus undulatus lizards. We manipulated circulating androgen levels (Day 0) …
"Sibling Species, Advertisement Calls, And Reproductive Isolation In Frogs Of The Leptodactylus Pentadactylus Species Cluster (Amphibia, Leptodactylidae), W. Ronald Heyer, Rafael O. De Sá, A. Rettig
"Sibling Species, Advertisement Calls, And Reproductive Isolation In Frogs Of The Leptodactylus Pentadactylus Species Cluster (Amphibia, Leptodactylidae), W. Ronald Heyer, Rafael O. De Sá, A. Rettig
Biology Faculty Publications
A recent re-evaluation of morphological and advertisement call variation in the large species of frogs of the Leptodactylus pentadactylus cluster discovered more examples of sibling species as defined by Ernst Mayr in his influential book Animal Species and Evolution. All previously documented instances of sibling species in frogs demonstrated advertisement call differentiation consistent with the calls serving as pre-mating isolating mechanisms. However, we find one instance of two species with nondistinguishable adult morphologies as well as nondistinguishable advertisement calls. Presumably, the new instances of sibling species reflect retention of ancestral adult morphologies and advertisement calls. Larval and habitat differentiation appear …
The Mayfly Newsletter, Peter M. Grant
The Mayfly Newsletter, Peter M. Grant
The Mayfly Newsletter
The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.
Are Leptodactylus Didymus And L. Mystaceus Phylogenetically Sibling Species (Amphibia, Anura, Leptodactylidae)?, Rafael O. De Sá, W. R. Heyer, Arley Camargo
Are Leptodactylus Didymus And L. Mystaceus Phylogenetically Sibling Species (Amphibia, Anura, Leptodactylidae)?, Rafael O. De Sá, W. R. Heyer, Arley Camargo
Biology Faculty Publications
The Leptodactylus fuscus species group consists of 25 currently recognized species; within this species group and distributed throughout the Amazon Basin, Atlantic Forests, Gran Chaco, and cerrados is the L. mystaceus species complex. This species complex consists of L. didymus, L. elenae, L. mystaceus, L. notoaktites, and L. spixi. Adult morphologies have been used to distinguish these species from each other except for L. didymus and L. mystaceus (Heyer, 1978; Heyer et al., 1996). Leptodactylus didymus and L. mystaceus are morphologically indistinguishable; the species are recognizable only by the characteristics of their advertisement calls: non-pulsed in L. didymus and pulsed …
Mechanical Properties Of The Integument Of The Common Gartersnake, Thamnophis Sirtalis (Serpentes: Colubridae), Gabriel Rivera, Alan H. Savitzky, Jeffrey A. Hinkley
Mechanical Properties Of The Integument Of The Common Gartersnake, Thamnophis Sirtalis (Serpentes: Colubridae), Gabriel Rivera, Alan H. Savitzky, Jeffrey A. Hinkley
Biological Sciences Faculty Publications
The evolution of the ophidian feeding mechanism has involved substantial morphological restructuring associated with the ability to ingest relatively large prey. Previous studies examining the morphological consequences of macrophagy have concentrated on modifications of the skull and cephalic musculature. Although it is evident that macrophagy requires highly compliant skin, the mechanical properties of the ophidian integument have received limited attention, particularly in the context of feeding. We examined mechanical properties of skin along the body axis in Thamnophis sirtalis (Colubridae). Data were collected from tensile tests and were analyzed using a multivariate analysis of variance (MANOVA) and post-hoc multiple comparison …
Use Of Cre Recombinase And Sb Transposase To Engineer Transgenic Zebrafish, Jie Dong
Use Of Cre Recombinase And Sb Transposase To Engineer Transgenic Zebrafish, Jie Dong
All-Inclusive List of Electronic Theses and Dissertations
Current transgenesis has become easier for certain species due to the recent development of exogenous non site-specific recombination systems such as Sleeping Beauty (SB) transposon, and site-specific recombination systems such as Cre-loxP. Such recombination systems overcame two major problems caused by conventional transgenesis, position effect and copy number effect. SB is a reconstructed fish transposon that has shown to efficiently insert transgenes into heterologous mammalian chromosomes. The Cre-loxP system is frequently used to delete a given sequence from the genome or to target the integration of foreign DNA. The use of both systems in combination, however, has not yet been …
The Mayfly Newsletter, Peter M. Grant
The Mayfly Newsletter, Peter M. Grant
The Mayfly Newsletter
The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.
A New Species Of Callulina (Anura: Microhylidae) From The West Usambara Mountains, Tanzania, Rafael O. De Sá, Simon P. Loader, Alan Channing
A New Species Of Callulina (Anura: Microhylidae) From The West Usambara Mountains, Tanzania, Rafael O. De Sá, Simon P. Loader, Alan Channing
Biology Faculty Publications
The description of the species Callulina kreffti was based on specimens collected in the East Usambara Mountains of Tanzania. Successive collecting has shown this species to be widely distributed through the Eastern Arc Mountains. Advertisement calls from populations in the type locality of Callulina kreffti were compared with calls from populations in the West Usambara Mountains. Analysis of the calls suggested that these two populations of Callulina represent two separate taxa. Subsequent morphological and molecular investigations indicated that these two populations are distinct. Herein, we describe a new Callulina species on the basis of call, morphology and molecular sequences.
A New Toad (Anura: Bufonidae) From Uruguay, Raúl Maneyro, Diego Arrieta, Rafael O. De Sá
A New Toad (Anura: Bufonidae) From Uruguay, Raúl Maneyro, Diego Arrieta, Rafael O. De Sá
Biology Faculty Publications
A new species of toad is described from small streams in the hills of Cuchilla de Haedo and Cuchilla Grande in northeastern Uruguay. Specimens of the new species were previously mistaken for Bufo arenarum; they differ from B.arenarum by having elongated parotoid glands and reddish-brown parotoid and cephalic crests. A discriminant analysis resulted in three groups corresponding to B. arenarum, Bufo rufus, and the specimens herein described as a new species.
Rare, Threatened And Endangered Species Of Oregon (2004), James S. Kagan, Sue Vrilakas, Eleanor P. Gaines, Cliff Alton, Fern Mcarthur, Kuuipo Walsh, Eric Scheuering, John A. Christy, Jon Hak, Claudine Tobalske, Annie Weiland, Theresa Koloszar, Oregon Natural Heritage Information Center
Rare, Threatened And Endangered Species Of Oregon (2004), James S. Kagan, Sue Vrilakas, Eleanor P. Gaines, Cliff Alton, Fern Mcarthur, Kuuipo Walsh, Eric Scheuering, John A. Christy, Jon Hak, Claudine Tobalske, Annie Weiland, Theresa Koloszar, Oregon Natural Heritage Information Center
Institute for Natural Resources Publications
Extinction is a natural process. Today, however, plant and animal species are disappearing world-wide at an accelerated pace. Based on current trends, half of the species on earth will be extinct within the next 100 years. The major cause of this phenomenon is large-scale destruction of native habitats, which has increased since European settlement began in the mid 1800's - in Oregon and throughout the New World.
Once lost, a species can never be recovered, and there is no way of knowing how useful it may have been. We do know that human beings and many of their industries depend …
Hatching Asynchrony, Survival, And The Fitness Of Alternative Adult Morphs In Ambystoma Talpoideum, Travis J. Ryan
Hatching Asynchrony, Survival, And The Fitness Of Alternative Adult Morphs In Ambystoma Talpoideum, Travis J. Ryan
Scholarship and Professional Work - LAS
The mole salamander, Ambystoma talpoideum, exhibits both aquatic (gilled) and terrestrial (metamorphosed) adult morphologies. Previous studies have shown the existence of body-size advantages associated with the terrestrial morph in A. talpoideum and other polymorphic salamanders (e.g., A. tigrinum). However, aquatic adult A. talpoideum mature at a younger age and often breed earlier than terrestrial adults. We tested the hypothesis that early maturation and reproduction in aquatic adults increase fitness (irrespective of body size). We reared larval A. talpoideum in mesocosms and varied the timing of hatching, with early-hatching larvae representing the offspring from early-breeding aquatic adults, and late-hatching larvae representing …
Características Histológicas De La Tumefacción Frontal De Melanophryniscus (Amphibia: Anura: Bufonidae), Daniel E. Naya, José A. Langone, Rafael O. De Sá
Características Histológicas De La Tumefacción Frontal De Melanophryniscus (Amphibia: Anura: Bufonidae), Daniel E. Naya, José A. Langone, Rafael O. De Sá
Biology Faculty Publications
Se analizó la histología tegumentaria de la región cefálica en seis especies del género Melanophryniscus, pertenecientes a los grupos stelzneri (4) y tumifrons (2), con el objetivo de esclarecer la estructura de la tumefacción frontal y su posible función. Las características generales de la histología del grupo stelzneri, coincidieron con las descripciones tegumentarias existentes para el género. Sin embargo, la región cefálica frontal en las dos especies del grupo tumifrons muestran cambios histológicos correlacionados a la tumefacción frontal. Esta estructura presenta una organización similar a otras macroglándulas presentes en la dermis de anuros (e.g., parotoides, paracnémicas), y por tanto se …
On The Engimatic Distribution Of The Honduran Endemic Leptodactylus Silvanimbus (Amphibia: Anura: Leptodactylidae), W. R. Heyer, Rafael O. De Sá, Sarah Muller
On The Engimatic Distribution Of The Honduran Endemic Leptodactylus Silvanimbus (Amphibia: Anura: Leptodactylidae), W. R. Heyer, Rafael O. De Sá, Sarah Muller
Biology Faculty Publications
Most species of the frog genus Leptodactylus occur in South America, and all authors who have treated the zoogeography of the genus have concluded that it originated somewhere in South America (e.g., Savage 1982). Savage (1982, 518) summarized the historical herpetofaunal units of the Neotropics as follows: "All evidence points to an ancient contiguity and essential similarity of a generalized tropical herpetofauna that ranged over tropical North, Middle, and most of South America in Cretaceous-Paleocene times. Descendents of this fauna are represented today by the South and Middle American tracks (Elements). To the north of this fauna ranged a subtropical-temperate …
The Mayfly Newsletter, Peter M. Grant
The Mayfly Newsletter, Peter M. Grant
The Mayfly Newsletter
The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.
Left-Sided Directional Bias Of Cloacal Contacts During House Sparrow Copulations, Karen B. Nyland, Michael P. Lombardo, Patrick A. Thorpe
Left-Sided Directional Bias Of Cloacal Contacts During House Sparrow Copulations, Karen B. Nyland, Michael P. Lombardo, Patrick A. Thorpe
Peer Reviewed Publications
Most female birds have only a left ovary and associated oviduct. The entry to the oviduct is on the left side of the urodeum of the cloaca. This arrangement may favor males that mount females from the left during copulation if it results in sperm being placed closer to the opening of the oviduct. Therefore, we predicted a left-sided directional bias of cloacal contacts during House Sparrow (Passer domesticus) copulations. Cloacal contacts from the left outnumbered those from the right 74 to 25 (3:1) during 25 bouts of copulation at 11 House Sparrow nests. While this pattern suggests …
Breeding Distribution And Habitat Use Of Audubon's Oriole In The Lower Rio Grande Valley Of Texas, Steven Gerald Monk
Breeding Distribution And Habitat Use Of Audubon's Oriole In The Lower Rio Grande Valley Of Texas, Steven Gerald Monk
Theses and Dissertations - UTB/UTPA
Audubon's Oriole ( Icterus graduacauda ) was known historically throughout the Lower Rio Grande Valley (LRGV) of Texas, but its breeding range has now declined to mainly riparian habitat in Starr County. Habitat loss, degradation, and fragmentation, and brood parasitism by Bronzed Cowbirds ( Molothrus aeneus ) are likely causes of this decline. Habitat patches where Audubon's Orioles were present were larger, with a larger vertical range of canopy, greater vegetation volume, greater richness of bird and woody plant species, less local deforestation, and less local habitat fragmentation than where Audubon's Orioles were absent. Bronzed Cowbirds showed no numeric correlation …
Movement Patterns In The Big Brown Bat (Eptesicus Fuscus), W. Adam Phelps
Movement Patterns In The Big Brown Bat (Eptesicus Fuscus), W. Adam Phelps
All-Inclusive List of Electronic Theses and Dissertations
Temperate insectivorous bats have historically used such structures as hollow trees, slabs of loose bark, foliage, and caves as roosts. With the advent of modern man in North America, human-built structures have become available to bats. Eptesicus fuscus is one of only two species of bats in the eastern United States that regularly utilize human structures as roosts, and the only one that regularly hibernates there. Individual ~- fuscus utilizing the attic of a church on the campus of St. Mary-of-the-Woods College (SMWC) were implanted with passive integrated transponder (PIT) tags. The electronic tag reader was placed near the only …
The Mayfly Newsletter, Peter M. Grant
The Mayfly Newsletter, Peter M. Grant
The Mayfly Newsletter
The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.