Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 24.311
Filtrar
1.
Gene ; 766: 145130, 2021 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-32911030

RESUMO

The LytTR family two-component system widely exists in bacterial cells and plays an important role in metabolic regulation. The lytS-L gene that encodes for a LytTR family sensor kinase was knocked out to study its influence on the growth, phenotype, and the biosynthesis of the insecticidal polyketide butenyl-spinosyn in Saccharopolyspora pogona NRRL 30141 (S. pogona). High performance liquid chromatography (HPLC) results showed that the butenyl-spinosyn yield of the lytS-L knockout mutant decreased by 58.9% compared with that of the parental strain. This is manifested by a weak toxicity of the mutant against the insect Helicoverpa assulta (H. armigera). Comparative proteomic analysis revealed the expression characteristics of the proteins in S. pogona and S. pogona-ΔlytS-L: a total of 14 proteins involved in energy metabolism were down-regulated, 9 proteins related to carbon metabolism such as glycolysis, and tricarboxylic acid cycle (TCA) were up-regulated, while 13 proteins involved in the biosynthesis of butenyl-spinosyn were down-regulated (fold change >1.2 or< 0.83). The qRT-PCR (Quantitative Real-time PCR) analysis illustrated that the changes in the expression levels of transcription and translation of the identified genes were consistent. This study explores the function of the two-component system of the LytTR family in S. pogona and shows that the lytS-L gene has an important influence on regulating primary metabolism and butenyl-spinosyn biosynthesis of S. pogona.


Assuntos
Proteínas de Bactérias/genética , Biossíntese de Proteínas/genética , Saccharopolyspora/genética , Animais , Regulação para Baixo/genética , Metabolismo Energético/genética , Insetos/microbiologia , Proteômica/métodos , Regulação para Cima/genética
2.
Nat Commun ; 11(1): 5604, 2020 11 05.
Artigo em Inglês | MEDLINE | ID: mdl-33154375

RESUMO

Many animal embryos pull and close an epithelial sheet around the ellipsoidal egg surface during a gastrulation process known as epiboly. The ovoidal geometry dictates that the epithelial sheet first expands and subsequently compacts. Moreover, the spreading epithelium is mechanically stressed and this stress needs to be released. Here we show that during extraembryonic tissue (serosa) epiboly in the insect Tribolium castaneum, the non-proliferative serosa becomes regionalized into a solid-like dorsal region with larger non-rearranging cells, and a more fluid-like ventral region surrounding the leading edge with smaller cells undergoing intercalations. Our results suggest that a heterogeneous actomyosin cable contributes to the fluidization of the leading edge by driving sequential eviction and intercalation of individual cells away from the serosa margin. Since this developmental solution utilized during epiboly resembles the mechanism of wound healing, we propose actomyosin cable-driven local tissue fluidization as a conserved morphogenetic module for closure of epithelial gaps.


Assuntos
Epitélio/embriologia , Gastrulação/fisiologia , Insetos/embriologia , Actomiosina/metabolismo , Animais , Fenômenos Biomecânicos , Movimento Celular , Epitélio/metabolismo , Proteínas de Insetos/metabolismo , Morfogênese , Membrana Serosa/embriologia , Membrana Serosa/metabolismo , Tribolium/embriologia , Cicatrização
3.
An Acad Bras Cienc ; 92(3): e20200764, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33175017

RESUMO

To determine the chemical composition and digestibility of insect meal for poultry made from the larvae of Tenebrio molitor (TL) and nymphs of Gryllus assimilis (GAN) a total excreta collection test was carried out, substituting 20% of the reference diet with each type of meal. The meals presented 6074 and 5975 kcal/Kg of gross energy, with 49.34% and 52.66% protein for TL and GAN respectively. The most nutrient digestibility was less than 65%, except for energy and ether-extract digestibility in the meal from Tenebrio molitor larvae, which were over 70%. The meals under analysis can be used as a source of nutrients in poultry diets.


Assuntos
Ração Animal , Galinhas , Ração Animal/análise , Fenômenos Fisiológicos da Nutrição Animal , Animais , Dieta/veterinária , Digestão , Insetos , Nutrientes
4.
Nat Commun ; 11(1): 5316, 2020 10 20.
Artigo em Inglês | MEDLINE | ID: mdl-33082335

RESUMO

A comparative analysis of animal behavior (e.g., male vs. female groups) has been widely used to elucidate behavior specific to one group since pre-Darwinian times. However, big data generated by new sensing technologies, e.g., GPS, makes it difficult for them to contrast group differences manually. This study introduces DeepHL, a deep learning-assisted platform for the comparative analysis of animal movement data, i.e., trajectories. This software uses a deep neural network based on an attention mechanism to automatically detect segments in trajectories that are characteristic of one group. It then highlights these segments in visualized trajectories, enabling biologists to focus on these segments, and helps them reveal the underlying meaning of the highlighted segments to facilitate formulating new hypotheses. We tested the platform on a variety of trajectories of worms, insects, mice, bears, and seabirds across a scale from millimeters to hundreds of kilometers, revealing new movement features of these animals.


Assuntos
Aves/fisiologia , Aprendizado Profundo , Insetos/fisiologia , Camundongos/fisiologia , Ursidae/fisiologia , Animais , Comportamento Animal , Feminino , Movimento , Redes Neurais de Computação , Software
5.
Zootaxa ; 4816(3): zootaxa.4816.3.2, 2020 Jul 17.
Artigo em Inglês | MEDLINE | ID: mdl-33055690

RESUMO

The following six new Oecetis species have been described and illustrated: O. lata, O. gretae, O. malickyi, O. porntipae, O. olahi, and O. hageni. The following three Oecetis species are recorded for the first time from Vietnam: O. maron Malicky Chantaramongkol 2005 (in Malicky 2005), O. iakchos Malicky 2005, and O. jachin Malicky Mey 2010 (in Malicky 2010a). We present new records of the following six Oecetis species that are previously known from Vietnam: O. raghava Schmid 1995, O. biramosa Martynov 1936, O. tripunctata (Fabricius 1793), O. meleagros Malicky Thani 2005, O. asmada Malicky 1979, and O. empusa Malicky Chaibu 2000. A map presents the distribution of the Oecetis species included in this report.


Assuntos
Insetos , Animais , Holometábolos , Vietnã
6.
Zootaxa ; 4816(3): zootaxa.4816.3.9, 2020 Jul 17.
Artigo em Inglês | MEDLINE | ID: mdl-33055697

RESUMO

A new species of Pararhagadochir Davis, 1940 is described from the State of Tocantins, Brazil. Pararhagadochir castaneus sp. nov. differs from its congeners by relatively smaller size, elongated forewings, body uniformly chestnut-brown, submentum inflexed and strongly sclerotized, outer tip of 10Lp with both sclerotized and membranous areas and Cu vein unforked. An identification key to all species of Pararhagadochir and a short identification key to the Brazilian species are provided.


Assuntos
Insetos , Neópteros , Animais , Brasil
7.
Zootaxa ; 4860(3): zootaxa.4860.3.5, 2020 Oct 13.
Artigo em Inglês | MEDLINE | ID: mdl-33055889

RESUMO

The complete mitochondrial genome (mitogenome) of Pteronarcys sachalina Klapálek was sequenced and compared with those of two other salmonflies for the first time. The mitogenome of P. sachalina was 16,180 bp in length, with an A+T content of 70.6%. The uniform set of 37 genes (13 PCGs, 22 tRNA genes and two rRNA genes) and a long control region (1431 bp) were all annotated. Most PCGs had standard ATN start codons and TAN stop codons. COX1 exhibited the highest evolutionary rate among the 13 PCGs of sequenced species of Pteronarcyidae. ND2 was truncated at the 3' end when compared with congeners. Most tRNA genes had typical cloverleaf secondary structures, whereas the dihydrouridine (DHU) arm of trnS1 was reduced. Tandem repeats and stem-loop (SL) structures were predicted in the control region of P. sachalina. Conserved sequences were found in control regions of the three already sequenced salmonflies, P. sachalina, Pteronarcys princeps Banks, and Pteronarcella badia (Hagen).


Assuntos
Genoma Mitocondrial , Insetos , Animais , China , Filogenia
8.
Zootaxa ; 4860(3): zootaxa.4860.3.8, 2020 Oct 13.
Artigo em Inglês | MEDLINE | ID: mdl-33055892

RESUMO

Based on collections made from streams of the Itapecuru, Parnaíba and Tocantins River basins, three species of Anacroneuria Klapálek are recorded for the first time from Maranhão State, northeastern Brazil: A. atrifrons Klapálek, A. minuta Klapálek and A. singularis Righi-Cavallaro Lecci. Additionally, A. leccii sp. nov. is described from this material and remarks concerning A. marlieri are also presented.


Assuntos
Insetos , Neópteros , Animais , Brasil
9.
Zootaxa ; 4809(2): zootaxa.4809.2.7, 2020 Jul 07.
Artigo em Inglês | MEDLINE | ID: mdl-33055940

RESUMO

Kamimuria shiae sp. n. and K. tenuilobata sp. n., two new perlid stoneflies from Wuyi Mountains of Fujian Province, eastern China, are described as new to science. The new species are compared with similar congeners. Kamimuria robusta Wu, 1948 is rediscovered from the type locality of the same mountain.


Assuntos
Insetos , Neópteros , Distribuição Animal , Animais , China
10.
Zootaxa ; 4803(3): zootaxa.4803.3.8, 2020 Jun 29.
Artigo em Inglês | MEDLINE | ID: mdl-33056010

RESUMO

Morphology of Phasmatodea eggs is remarkably diverse and highly valuable in taxonomic research. Two alterative hypotheses have been proposed to describe the phylogenetic relationship of the species from the genus Agathemera Stål. Additionally, descriptions of the egg morphology within Agathemera have been done based on the eggs of two species. This small sample size does not represent the diverse egg morphology along the genus, thus we attempt to describe the eggs from all the known Agathemera species. The main goal of the present study is to determine whether the evolution of the eggs occurred through either divergent or convergent evolution. We based our descriptions on morphometrics, morphology and the ultrastructure. For data analysis, principal component analysis (PCA) was performed on morphometric variables and the characters emerged from the morphological and ultrastructure were mapped over the molecular phylogeny. The results show that it is possible to discriminate among species using the morphology of the different egg structures, and furthermore, a divergent event at the base of the tree, differentiate the overall egg shape and the internal micropylar plate shape. Finally, we conclude that both divergent and convergent evolution are shaping the different structures of the Agathemera eggs.


Assuntos
Insetos , Neópteros , Animais , Córion , Filogenia , Análise de Componente Principal
11.
Zootaxa ; 4822(2): zootaxa.4822.2.12, 2020 Aug 05.
Artigo em Inglês | MEDLINE | ID: mdl-33056297

RESUMO

Attenboroughctena Ceccolini Cianferoni nom. nov. is established as the new name for the genus Ceroctena Carré Carré, 1991 (Ctenophora: Cydippida: Pleurobrachiidae), preoccupied by Ceroctena Guenée, 1852 (Insecta: Lepidoptera: Noctuidae).


Assuntos
Ctenóforos , Mariposas , Animais , Insetos , Nematóceros
12.
Zootaxa ; 4767(3): zootaxa.4767.3.4, 2020 Apr 28.
Artigo em Inglês | MEDLINE | ID: mdl-33056556

RESUMO

The taeniopterygid genus Taenionema Banks, 1905 is reported from China for the first time. A newly discovered and probable new species of this genus, Taenionema sp., is described and illustrated based on larvae from Zhejiang Province of coastal southeastern China. The species is characterized by the male larva having a bilobed post-genital plate. Adults will be necessary for a future formal species description. This contribution represents the first larval description in the family Taeniopterygidae from China.


Assuntos
Insetos , Neópteros , Animais , China , Larva , Masculino
13.
Zootaxa ; 4767(2): zootaxa.4767.2.5, 2020 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-33056566

RESUMO

Filchneria amabilis (Jewett, 1958) is recognized as a species of Zhiltzovaia Özdikmen, 2008 with the valid name Zhiltzovaia amabilis (Jewett, 1958) comb. nov., and Z. cachemirica (Aubert, 1959) is placed as a junior synonym of that species. Zhiltzovaia amabilis is redescribed from new material collected from streams of Pamir, Tajikistan, and northwestern Himalaya, northern India. New illustrations of all life stages are presented.


Assuntos
Insetos , Animais
14.
Zootaxa ; 4801(3): zootaxa.4801.3.1, 2020 Jun 19.
Artigo em Inglês | MEDLINE | ID: mdl-33056643

RESUMO

We describe and illustrate 15 species of Ptiloneura, from Colombia and Peru. The number of species of Ptiloneura is raised to 34, of which 28 (82.3%) are Colombian. One species is from Brazil, four species are from Peru, one is from Nicaragua and two species are from Venezuela. Two species are shared between Colombia and Peru, one species is shared between Colombia and Venezuela, and 25 species are endemic to Colombia. An identification key to the males and a phylogenetic analysis of Ptiloneura are included.


Assuntos
Insetos , Animais , Colômbia , Masculino , Peru , Filogenia
15.
Zootaxa ; 4801(3): zootaxa.4801.3.7, 2020 Jun 19.
Artigo em Inglês | MEDLINE | ID: mdl-33056648

RESUMO

A remarkable new species of Isoperla Banks, 1906, I. sextuberculata Huo Du, sp. nov. from Hubei Province, Central China is described. The new species is distinguished by the unique paired abdominal processes on male terga 4, 7, and 8. The new species is compared to similar Isoperlinae congeners.


Assuntos
Insetos , Neópteros , Distribuição Animal , Animais , China , Masculino
16.
Zootaxa ; 4801(3): zootaxa.4801.3.10, 2020 Jun 19.
Artigo em Inglês | MEDLINE | ID: mdl-33056651

RESUMO

Males of four new species of caddisflies, Polyplectropus hofmaierae n. sp. (Polycentropodidae), Eoneureclipsis chinachotiae n. sp. (Psychomyiidae), Hydropsyche khaonanensis n. sp. (Hydropsychidae), and Lannapsyche tairomyenensis n. sp. (Odontoceridae) are described and illustrated. Polyplectropus hofmaierae n. sp. is distinguished from other species by the shape of the apical end of its inferior appendages and its sharp intermediate appendages. The posterior edges of their inferior appendages run slanting to the ventrodistal point and are densely covered by short and stiff bristles. Eoneureclipsis chinachotiae n. sp. is differentiated by characters of its phallus, as the first two thirds of its length are slender and slightly curved. The distal part has a dorsal hump with a very slender thread on its caudal edge and is slightly bent downward and dilated. Hydropsyche khaonanensis n. sp. can be differentiated from the other species by its phallus, in which the two apicolateral lobes in ventral view have rounded outer edges. Lannapsyche tairomyenensis n. sp. can be separated from the others by characteristics of the dorsal view of segment IX and the harpago of its inferior appendages. Segment IX is triangular with distinctly convex preanal appendages along the posterior edge of this segment, and the harpago and subapical lobes are relatively similar in shape and length.


Assuntos
Insetos , Parques Recreativos , Animais , Extremidades , Holometábolos , Masculino , Tailândia
17.
Zootaxa ; 4801(3): zootaxa.4801.3.13, 2020 Jun 19.
Artigo em Inglês | MEDLINE | ID: mdl-33056655

RESUMO

In the publication by Kaur et al. (2020), the depository for the holotype of Chimarra gangtokensis new species was given as "(NPC)", but no corresponding explanation for this acronym was provided in that publication. Therefore, the name of the species is unavailable (International Code of Zoological Nomenclature 1999, Art. 16.4.2). We clarify here that the holotype is a male deposited in the National Pusa Collection, Division of Entomology, Indian Agricultural Research Institute, Pusa, New Delhi (NPC). The purpose of this note is to validate the name of the new species from the publication date of this erratum by a reference to the original description and diagnosis as an indication (International Code of Zoological Nomenclature 1999, Art. 13.1.2).


Assuntos
Holometábolos , Insetos , Animais , Índia , Masculino
18.
Zootaxa ; 4851(3): zootaxa.4851.3.8, 2020 Sep 11.
Artigo em Inglês | MEDLINE | ID: mdl-33056723

RESUMO

A new species of the nemourid genus Sphaeronemoura, S. tetragona Du Zhao, sp. nov. is described from Hunan Province of southeastern China. The new species is illustrated and compared to the other similar species of this genus. Additional illustrations and records for S. songshana Li Yang, 2009, S. multicurvata Li, Li Yang, 2020, and S. grandicauda (Wu, 1973) are also provided.


Assuntos
Insetos , Neópteros , Distribuição Animal , Animais , China
19.
Zootaxa ; 4845(4): zootaxa.4845.4.5, 2020 Sep 04.
Artigo em Inglês | MEDLINE | ID: mdl-33056756

RESUMO

The stoneflies and caddisflies of North Africa are still poorly known as vast areas of Algeria have yet to be investigated. A survey of the macroinvertebrates of the Seybouse River, northeast Algeria, was carried out from July 2014 to December 2016. Three species of stoneflies (Capnopsis schilleri, Capnioneura petitpierreae, and Tyrrhenoleuctra tangerina) and five taxa of caddisflies (Mesophylax aspersus, Hydropsyche maroccana, H. resmineda, H. artax/lobata, and H. gr. pellucidula) were identified. All taxa are new records to the Seybouse River and seven of them are new to northeastern Algeria. A multivariate analysis indicated that the Hydropsychidae exhibited a clear longitudinal gradient along the Seybouse River while Mesophylax aspersus seemed adapted to species-poor, intermittent streams. Further investigations of the stoneflies and caddisflies may inform conservation efforts and will prove useful to monitor the Seybouse River and similarly threatened North African rivers and streams.


Assuntos
Insetos , Argélia , Animais , Holometábolos , Rios
20.
Zootaxa ; 4845(3): zootaxa.4845.3.3, 2020 Sep 03.
Artigo em Inglês | MEDLINE | ID: mdl-33056763

RESUMO

It has recently been determined that Pseudomallada prasinus (Burmeister, 1839) is part of a complex of prasinoid species (Duelli Obrist, 2019). Apart from P. prasinus s.s. and P. abdominalis s.s., each at the opposite end of the prasinoid spectrum, some populations in Switzerland and surrounding countries show consistently differing morphological and biological traits, while nevertheless living in the same habitats. To test whether they constitute reproductively isolated species, seven strains of three morphologically distinctive prasinoid morphs (Pp1, Pp2, Pp3) were reared and the virgin offspring (F1) paired with single partners of each of the six other strains. The four strains of morph Pp3 were unable to produce any viable offspring when paired with the two other morphs, suggesting that Pp3 is a distinct species. The Mediterranean morph Pp1 produced some offspring with the two strains of morph Pp2, but the crossed offspring (F2) of the hybrids yielded less than 2% viable larvae. Furthermore, in a cage experiment with free choice of partners between Pp1 and Pp2, all females produced offspring of their own morph; there were no hybrids. We conclude that north and south of the Alps there are at least three reproductively isolated prasinoid species in addition to P. prasinus and P. abdominalis. Their distinctiveness is principally based on live color traits, but also on the presence or absence of the "furwing" phenotype in males (double number of setae on wing veins). Therefore, many old museum specimens, especially females, cannot be identified with confidence. Because most of the dozens of synonymized type specimens of prasinoid species and varieties in museums are females, and all have lost their color, it is presently not possible to assign valid names to the three "new" species. We call them Pseudomallada prasinoid 1 (Pp1), P. prasinoid 2 (Pp2), and P. prasinoid 3 (Pp3). Using the distinctive traits given here, most specimens that have retained their original colors (live, recently pinned, or deep frozen) can be identified.


Assuntos
Insetos , Animais , Cor , Feminino , Larva , Masculino , Fenótipo
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA