检索结果-南通市图书馆

Intraspecific competition in Zabrotes subfasciatus： Physiological and behavioral adaptations to different amounts of host

引用

Insect Science 2012年第1期19卷 102-111页

作者： isabel r.v.teixeira Fernando S.Zucoloto Insect Nutrition and Feeding Behavior Laboratory Department of BiologyFaculdade de Filosofia Ciencias e Letras de Ribeirao Preto Universidade de Sao PauloSao Paulo epartment of Biology Federal Institute of Sul de Minas-Campus MuzambinhoIFSULDEMINAS MuzambinhoMinas GeraisBrazil

The effects of competition on populations of the bean weevil Zabrotes sub- fasciatus were analyzed during 41 generations under different competition levels. Three competition environments were established by maintaining the number of couples （6） and varying the amount of available host seeds： HC, high （limited availability of host： 1.35 g）; IC, intermediate （intermediate availability of host： 6 g）; and LC, low competition （abun- dance of host： 36 g）. It was found that the distribution of the eggs laid on grains was different among treatments： in LC, for example, although females showed high fecundity （35.4 ± 5.6 eggs/female） the number of eggs laid on each grain was small （1.2 ± 0.4 eggs on each seed）, thus avoiding larval competition of their offspring; whereas in HC treatment, females showed low fecundity （27.04 ± 4.5 eggs/female） but laid many eggs on each grain （15.03 ± 4.3 eggs）. There were no changes in the ability to respond to different amounts of host via oviposition behavior （egg distribution） during 41 generations. How- ever, HC females had more offspring than LC females under HC conditions. This suggests that HC insects evolved toward higher fitness in crowded conditions. In addition, after inverting the competition level, insects behaved independently of the treatment conditions they experienced through generations, thus showing that oviposition behavior is flexible. Taken together, our results show that Z. subfasciatus presents a broad range of behavioral and physiological responses which allows for quick and reversible adjustments to sudden changes in the amount of resources.

关键词： bean weevil Coleoptera egg distribution oviposition Phaseolus vulgaris phenotypic plasticity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Human health risks associated to trace elements and metals in commercial fish from the Brazilian Amazon

引用

Journal of Environmental Sciences 2025年第2期148卷 230-242页

作者： Andrea v.Waichman Gabriel Silva de Souza Nunes rhaul de Oliveira isabel López-Heras Andreu rico Federal University of the Amazon Institute of Biological SciencesAv.Rodrigo Ramos 3000Manaus 69077-000Brazil Federal University of Pernambuco Department of ZoologyAv.Prof Moraes Rego 1235Cidade UniversitáriaRecife 50670-901Brazil University of Campinas School of TechnologyRua Paschoal Marmo 1888-Jd.Nova ItáliaLimeira 13484-332Brazil IMDEA Water Institute Science and Technology Campus of the University of AlcaláAv.Punto Com 2Alcaláde Henares 28805MadridSpain Cavanilles Institute of Biodiversity and Evolutionary Biology University of Valenciac/Catedrático JoséBeltrán 246980PaternaValenciaSpain

Fish constitutes the main protein source for the Amazonian ***,the impact of different anthropogenic activities on trace element and metal accumulation in fish and their risks for human health at a regional scale remain largely *** we assessed exposure levels of 10 trace elements andmetals(Cr,Mn,Fe,Ni,Cu,Zn,As,Cd,Pb,and Hg)in 56 samples belonging to 11 different species of fish from the Brazilian *** studied the relationship between exposure levels,fish origin,and fish feeding habits,and assessed toxicological and carcinogenic risks for the Amazonian *** significant correlation was found between sampling site and exposure levels to the studied elements,but a significant difference was found between the accumulation of some metals and the position of the fish species in the food *** concentrations of Cr and Hg in fish flesh were found to exceed the Brazilian limits for human *** study shows that current fish consumption patterns can lead to estimated daily intakes of Hg,As and Cr that exceed the oral reference dose,thus posing a toxicological ***,carcinogenic risks may be expected due to the continued exposure to Cr and *** results of this study show that the consumption of wild caught fish in the Amazon region should be ***,continued monitoring of trace element and metal contamination in fish and on the health of the Amazonian population is recommended,particularly for riverine and indigenous communities.

关键词： Metals Deforestation Mining Freshwater ecosystems Carcinogenic risks Amazon

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Host preference of the bean weevil Zabrotes subfasciatus

引用

Insect Science 2008年第4期15卷 335-341页

作者： isabel ribeiro do valle teixeira Angel roberto Barchuk Fernando Sergio Zucoloto Department of Biology Centro Universitario da Fundacao Educacional de Guaxupe Minas Gerais Department of Biology Faculdade de Filosofia Ciencias e Letras de Ribeirao Preto Universidade de Sao Paulo Sao Paulo Department of Biological Sciences Universidade Federal de Alfenas UnifaI-MG Alfenas Minas Gerais Brazil

It is largely known that the range of an insect diet is mostly determined by oviposition behavior, mainly in species with endophytic larvae such as Zabrotes subfasciatus. However, the proximate factors determining host choice and the subsequent steps leading to the expansion or reduction of the host number and occasional host shifts are largely unknown. We analyzed various factors determining host preference of Z. subfasciatus through the evaluation of：（i） oviposition preference of a wild population of Z. subfasciatus on the usual host （bean） and unusual hosts （lentil, chickpea and soy）, and the performance of the offspring; （ii） artificial selection for increasing preference for hosts initially less frequently chosen; （iii） comparison of oviposition behavior between two different populations （reared for -30 generations in beans or chickpeas, respectively）; （iv） oviposition timing on usual and unusual hosts; and （v） identification of preference hierarchies. We found that when using unusual hosts, there is no correlation between performance and preference and that the preference hierarchy changes only slightly when the population passes through several generations on the less frequently accepted host. We also found a positive response to artificial selection for increasing oviposition on the less preferred host; however, when the host-choice experiment involved two varieties of the usual host, the response was faster than when the choice involved usual and unusual hosts. Finally, beetles reared on an unusual host （chickpea） for 26 generations showed similar good fitness on both usual and unusual hosts, indicating that the use of a new host does not necessarily result in the loss of performance on the original host. Nevertheless, this population showed lower fitness on the usual host than that of the original population, suggesting an underlying partial trade-off phenomenon which may contribute to a broadening of diet of this insect species.

关键词： artificial selection evolution Phaseolus Cicer plant-insect interaction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Classification methodology for spare parts management combining maintenance and logistics perspectives

引用

Journal of Management Analytics 2018年第2期5卷 116-135页

作者： Catarina teixeira isabel Lopes Manuel Figueiredo ALGOrITMI research Centre Department of Production and SystemsUniversity of MinhoGuimarãesPortugal

Spare parts management is a function of maintenance management that aims to support maintenance activities,giving real-time information on the available quantities of each spare part and adopting the inventory policies that ensure their availability when required,minimizing *** classification of spare parts is crucial to control the vast number of parts that have different characteristics and *** parts management involves mainly two areas,maintenance and ***,the integration of both input information is recommended to make *** paper presents a multicriteria classification methodology combining maintenance and logistics perspectives that intends to differentiate and group spare parts to,subsequently,define the most appropriate stock management policy for each *** methodology was developed based on a case study carried out in a multinational manufacturing company and is intended to be included in its computerized maintenance management system to support decision-making.

关键词： criticality maintenance management multi-criteria classification spare parts management

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Differential diagnosis of uterine vascular anomalies:Uterine pseudoaneurysm as a cause of massive hemorrhage

引用

World Journal of Clinical Cases 2025年第9期13卷 60-64页

作者： Teresa Gastañaga-Holguera isabel Campo Gesto Laura Gómez-Irwin Marta Calvo Urrutia Department of Obstetrics and Gynecology San Carlos Clinical HospitalMadrid 28040Spain Department of Gastroenterology University Hospital of CrucesBaracaldo 48903BizkaiaSpain

In this article,we comment on the paper by Kakinuma et al published *** focus specifically on the diagnosis of uterine pseudoaneurysm,but we also review other uterine vascular anomalies that may be the cause of life-threating hemorrhage and the different causes of uterine *** artery pseudoaneurysm is a complication of both surgical gynecological and nontraumatic *** hemorrhage is the consequence of the rupture of the *** artery pseudoaneurysm can develop after obstetric or gynecological procedures,being the most frequent after cesarean or vaginal deliveries,curettage and even during ***,there are several cases described unrelated to pregnancy,such as after conization,hysteroscopic surgery or laparoscopic *** is the clinical manifestation and it can be life-threatening so suspicion of this vascular lesion is essential for early diagnosis and ***,there are other uterine vascular anomalies that may be the cause of severe hemorrhage,which must be taken into account in the differential *** tomography angiography and embolization is supposed to be the first therapeutic option in most of them.

关键词： Uterine artery pseudoaneurysm vascular anomaly Uterine vascular malformation Massive hemorrhage Postpartum hemorrhage Angiography Uterine embolization Transarterial embolization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Early-onset colorectal cancer:A review of current knowledge

引用

World Journal of Gastroenterology 2023年第8期29卷 1289-1303页

作者： Margarida r Saraiva Isadora rosa isabel Claro Department of Gastroenterology Instituto Português de Oncologia de Lisboa Francisco GentilLisboa 1099-023Portugal

Colorectal cancer(CrC)is one of the most prevalent malignancies *** most prevalent among older people,its incidence above 50 years old has been decreasing globally in the last decades,probably as a result of better ***,its incidence in patients below 50 years old[early-onset CrC(EO-CrC)]has been increasing,for reasons not yet fully ***’s increasing incidence is genre independent but shows racial disparities and has been described to occur *** follows a birth-cohort effect which probably reflects a change in exposure to CrC risk *** incidence is predicted to double until 2030,which makes EO-CrC a serious public health *** modifiable and non-modifiable risk factors have been identified-some are potential targets for preventive ***-CrC is often diagnosed at advanced stages and histological features associated with poor prognosis have been ***-CrC presents some distinctive features:Microsatellite instability is common,but another subtype of tumours,both microsatellite and chromosome stable also seems *** are no age-specific treatment protocols and studies on EO-CrC survival rates have shown conflicting *** to the higher germline pathological mutations found in EO-CrC patients,an accurate genetic risk evaluation should be *** this review,we summarize the current evidence on epidemiological,clinical,histopathological and molecular features of EO-CrC and discuss the contribution of genetics and lifestyle risk *** further comment on screening strategies and specific dimensions to consider when dealing with a younger cancer patient.

关键词： Colorectal cancer Early-onset Adenocarcinoma Hereditary Birth-cohort effect risk factors

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The brain as a source and a target of prolactin in mammals

引用

Neural regeneration research 2022年第8期17卷 1695-1702页

作者： Ana r.Costa-Brito isabel Gonçalves Cecília r.A.Santos CICS-UBI-Health Sciences research Centre Universidade da Beira InteriorCovilhãPortugal C4-UBI-Cloud Computing Competence Centre Universidade da Beira InteriorCovilhãPortugal

Prolactin is a polypeptide hormone associated with an extensive variety of biological *** the roles of prolactin in vertebrates,some were preserved throughout *** is the case of its function in the brain,where prolactin receptors,are expressed in different structures of the central nervous *** the brain,prolactin actions are principally associated with reproduction and parental behavior,and involves the modulation of adult neurogenesis,neuroprotection,and neuroplasticity,especially during pregnancy,thereby preparing the brain to *** is mainly produced by specialized cells in the anterior pituitary ***,during vertebrate evolution many other extrapituitary tissues do also produce prolactin,like the immune system,endothelial cells,reproductive structures and in several regions of the *** review summarizes the relevance of prolactin for brain function,the sources of prolactin in the central nervous system,as well as its local production and secretion.A highlight on the impact of prolactin in human neurological diseases is also provided.

关键词： brain brain disease choroid plexus neurogenesis neuroplasticity neuroprotection prolactin prolactin receptor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Aquatic exercise program-modulated oxidative stress markers in patients with Parkinson's disease

引用

Neural regeneration research 2020年第11期15卷 2067-2072页

作者： Caroline Dani isabel teixeira Proenca Jessica Marinho Pamela Peccin Ivy reichert vital da Silva Simone Nique vera Striebel Daniela Pochmann viviane rostirola Elsner Programa de Pos Graduacao em Biociencias e reabilitacao do Centro Universitario Metodista-IPA Porto AlegreRSBrazil Curso de Fisioterapia do Centro Universitario Metodista-IPA Porto AlegreRSBrazil Programa de Pos Graduacao em Ciencias Biologicas:Fisiologia Universidade Federal do Rio Grande do SulPorto AlegreRSBrazil Programa de Pos Graduacao em Farmacologia e Terapeutica Universidade Federal do Rio Grande do SulPorto AlegreRSBrazil

Parkinson's disease is a neurodegenerative *** stress,i.e.,the imbalance between the generation of reactive oxygen species and the antioxidant defense capacity of the body,plays an important role in the pathogenesis of this *** exercise can regulate oxidative *** purpose of this study was to analyze the short-and long-term effects of an aquatic exercise program on oxidative stress levels in patients with Parkinson's *** aquatic exercise program was carried out during 1 month with two sessions per week(1 hour/session).Blood samples were collected at four different time points:pre-intervention,immediately,48 hours,and 30 days after the first session of aquatic exercise *** results revealed that water-based programs modulated antioxidant enzyme activity,increased superoxide dismutase activity,reduced catalase activity,and increased the ratio of superoxide dismutase activity to catalase activity in patients with Parkinson's *** with pre-intervention and 48 hours after the first session of aquatic exercise program,superoxide dismutase activity was higher and catalase activity was lower immediately and 30 days after the first *** results demonstrated that aquatic exercise program could modulate oxidative stress,mainly by the effect of antioxidant enzyme *** results could better help understand the target of oxidative stress in Parkinson's *** study was approved by the Ethics Committee of Centro Universitário Metodista IPA(approval No.1.373.911)on August 9,2019 and registered with rEBEC(registration number:rBr-6 NJ4 MK).

关键词： antioxidant enzyme antioxidants aquatic exercise exercise therapies neurodegenerative disease oxidative stress Parkinson's disease

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Functional responses to deforestation in fish communities inhabiting neotropical streams and rivers

引用

Ecological Processes 2023年第1期12卷 716-732页

作者： isabel Cantera Céline Jézéquel Tony Dejean Jérôme Murienne régis vigouroux Alice valentini Sébastien Brosse Department of Environmental Science and Policy Universitàdegli Studi di MilanoVia Celoria 2620133 MilanItaly Laboratoire Evolution et DiversitéBiologique UMR5174-UniversitéPaul SabatierCNRSIRD118 Route de Narbonne31062 ToulouseFrance SPYGEN Savoie Technolac-BP 27417 Rue du Lac Saint-André73375 Le Bourget-du-Lac CedexFrance HYDrECO Laboratoire Environnement de Petit SautB.P 82397388 Kourou CedexFrench GuianaFrance

Background Deforestation is a widespread disturbance for neotropical freshwater *** biodiversity declines have been associated with deforestation,its functional consequences for stream and river fish faunas remain poorly *** this study,we explored how deforestation affects the different facets of the functional structure of fish communities inventoried using environmental DNA metabarcoding in 64 river and 35 stream sites of French ***,we investigated how functional richness,divergence,evenness and identity of fish faunas are affected by *** We showed that anthropogenic disturbances in French Guiana are modifying the functional diversity of freshwater fish *** disturbances not only affected the amount of functional traits held by the communities but also the identity of the traits and the internal structure of the functional ***,different facets of the functional diversity supported by fish assemblages were *** streams,deforestation did not affect the overall diversity of traits but reduced functional redundancy,underlined by a shift in functional identity towards assemblages dominated by pelagic *** contrast,river fish faunas experienced a decline in functional richness,paired with shifts in functional identity and a loss of fish species with extreme *** The response to deforestation differed between streams and rivers,but it supports the hypothesis that deforestation is linked to functional changes in fish *** diminishing the range of the functions in rivers or by jeopardizing the redundancy of functions in streams,deforestation could severely hamper the functioning and stability of neotropical freshwater ecosystems.

关键词： eDNA Traits Functional space richness Divergence Evenness Identity Gold mining

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

response of saproxylic insect communities to logging history, tree species, stage of decay, and wood posture in the central Nearctic boreal forest

引用

Journal of Forestry research 2018年第5期29卷 1365-1377页

作者： r.W.James Dennis Jay r.Malcolm Sandy M.Smith M.isabel Bellocq Faculty of Forestry University of Toronto 33 Willcocks St.Toronto ON M5S 3B3 Canada Departamento de Ecología Genética y EvoluciónFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos Aires and IEGEBA (CONICET)Buenos Aires Argentina

Saproxylic insect assemblages are essential functional components of forest ecosystems that can be affected by forest *** used a split-plot ANOvA design to analyze differences in selected saproxylic insects（all arthropod orders and dipteran and parasitic hymenopteran families） emerging from dead wood of sites with different logging histories（horse-logged,mechanically-logged and unlogged）,tree species（Populus and Picea）,stage of decay（early-and late-decay stages） and posture（standing and downed logs） in the boreal forest of central *** clear effects of logging history were seen for the studied taxa; however,interaction between logging history and other dead wood features was *** consistently emerged more from Populus than from Picea dead *** of the studied saproxylic families were more abundant in late-decay than in early-decay *** of the Cecidomyiidae,Ceratopogonidae,Empididae,Mycetophilidae and Sciaridae families,and hymenopterans of the Diapriidae and Ichneumonidae families were significantly more abundant in downed than in standing dead *** contrast,Mymaridae was most abundant in standing dead *** study provides evidence that some insects at high taxonomic levels respond differently to dead wood quality,and this could inform future management strategies in the boreal forest for the conservation of saproxylic fauna and their ecological functions.

关键词： Boreal forest Dead wood quality Forest harvesting High-level taxa Saproxylic insects

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：