Correction to: Predation on glass eels of Japanese eel <Emphasis Type="Italic">Anguilla japonica</Emphasis> in the Tone River Estuary,Japan     

Yoichi Miyake  Aigo Takeshige  Hikaru Itakura  Hajime Itoh  Hiroaki Onda  Akira Yamaguchi  Akihito Yoneta  Kohma Arai  Yulina V. Hane  Shingo Kimura 《Fisheries Science》2018,84(6):1015-1016

  相似文献   

Phenological and physiological evaluation of first and second cropping periods of sorghum and maize crops     

Maria Antonia Machado Barbosa  Kacilda Naomi Kuki  Pedro Santos Peno Bengala  Emilly dos Santos Pereira  Angélica Fátima de Barros  Sebastián Giraldo Montoya  Leonardo Duarte Pimentel 《Journal of Agronomy and Crop Science》2020,206(2):263-276

Environmental conditions influence phenology and physiological processes of plants. It is common for maize and sorghum to be sown at two different periods: the first cropping (spring/summer) and the second cropping (autumn/winter). The phenological cycle of these crops varies greatly according to the planting season, and it is necessary to characterize the growth and development to facilitate the selection of the species best adapted to the environment. The aim of this study was to characterize phenological phases and physiological parameters in sorghum and maize plants as a function of environmental conditions from the first cropping and second cropping periods. Two parallel experiments were conducted with both crops. The phenological characterization was based on growth analyses (plant height, leaf area and photoassimilate partitioning) and gas exchange evaluations (net assimilation rate, stomatal conductance, transpiration and water-use efficiency). It was found that the vegetative stage (VS) for sorghum and maize plants was 7 and 21 days, respectively, longer when cultivated during the second cropping. In the first cropping, the plants were taller than in the second cropping, regardless of the crop. The stomatal conductance of sorghum plants fluctuated in the second cropping during the development period, while maize plants showed decreasing linear behaviour. Water-use efficiency in sorghum plants was higher during the second cropping compared with the first cropping. In maize plants, in the second cropping, the water-use efficiency showed a slight variation in relation to the first cropping. It was concluded that the environmental conditions as degree-days, temperature, photoperiod and pluvial precipitation influence the phenology and physiology of both crops during the first and the second cropping periods, specifically cycle duration, plant height, leaf area, net assimilation rate, stomatal conductance and water-use efficiency, indicating that both crops respond differentially to environmental changes during the growing season.  相似文献   

Alessandro Bonanno and Lawrence Busch (eds): Handbook of the international political economy of agriculture and food     

Marie Louise Ryan 《Agriculture and Human Values》2018,35(3):731-732

  相似文献   

Paternal genomotype affects female growth in a hybrid fish complex          下载免费PDF全文

Sara Carona  Maria J. Collares‐Pereira  M. Filomena Magalhães 《Ecology of Freshwater Fish》2017,26(4):719-721

  相似文献   

Food Value of Four Microalgae for Juveniles of the Lion's Paw Scallop Lyropecten subnodosus (Sowerby, 1833)     

Maria Concepción  Lora-Vilchis Miguel  Robles-Mungaray Natalia  Doktor Domenico  Voltolina 《Journal of the World Aquaculture Society》2004,35(2):297-304

  相似文献   

冬季罗非鱼营养性疾病的探讨与防治   总被引：1，自引：0，他引：1  

莫有东 《淡水渔业》2001,31(3):35-35

罗非鱼属热带鱼类 ,其最适生长温度在 2 5～35℃ ,生存温度 15～ 37℃ ,而致死温度在 10℃以下。在我国南方地区 (特别是两广地区 ) ,冬季平均气温在 10℃以上 ,为罗非鱼在自然条件下安全越冬提供了十分有利的条件。然而在冬季 ,许多地方还是发生了较大规模的鱼病和死亡情况。下面就南方地区冬季罗非鱼发病死亡的原因进行探讨并提出防治措施 ,以供参考。1　鱼病的流行情况与症状进入冬季 ,罗非鱼的死亡情况大多发生在气温骤然下降两、三天后 ,当气温又有所回升之时 ,其损失情况也各有不同。有些是集中大批量死亡 ,有些则是连续几天不断有死…  相似文献   

农民收入构成变化特点与分析评价   总被引：1，自引：0，他引：1  

莫明荣  黄文校 《广西农学报》2004,(3):19-24

近年来,农民收入增长缓慢已成为农业和农村经济发展中的突出问题,分析评价农民收入构成变化情况与特点,利于探索农民增收的新途径和对策措施.……  相似文献   

Modeling multi-scale spatial ecological processes under the discrete event systems paradigm     

Maria J. Perestrello de Vasconcelos  Bernard P. Zeigler  Lee A. Graham 《Landscape Ecology》1993,8(4):273-286

A multi-scale spatial ecological model of a wet sclerophyllous forest subject to recurrent fires is presented. The model is specified in a Discrete Event Systems framework (DEVS) (Zeigler, 1990) interfaced with a Geographic Information System (GIS), and includes the ability to simulate landscape dynamics at several levels of resolution simultaneously. This is achieved by encoding a modular hierarchical representation of the forest landscape components into a set of nested, interconnected, and spatially referenced dynamic models. The results of the landscape dynamics simulations are displayed as sequences of maps through time, illustrating the potential of this modeling methodology for dealing with complex hierarchical structures that operate at several spatial and temporal resolutions.Research work supported by Junta Nacional de Investigaçäo Científica e Tecnológica, Portugal, and the Advanced Resource Technology Program, University of Arizona, USA.  相似文献   

Effects of Hydrogen Peroxide on Hematology and Blood Chemistry Parameters of Walleye Stizostedion vitreum     

Maria J.  Tort  Gregory A.  Wooster Paul R.  Bowser 《Journal of the World Aquaculture Society》2003,34(2):236-242

  相似文献   

Laboratory diagnosis and disease occurrence in the current African swine fever eradication program in Spain, 1989–1991     

Steen Bech-Nielsen  Maria Louisa Arias  Jesus Panadero  Jose M. Escribano  Concepcion Gomez-Tejedor  Q. Perez Bonilla  J. M. Sanchez-Vizcaino 《Preventive veterinary medicine》1993,17(3-4):225-234

The purpose of this study was to determine the rate of decline and geographical distribution by municipality of clinical and subclinical African swine fever (ASF) in the affected areas of Spain. A second aim was to evaluate the performance of diagnostic tests in the Spanish ASF eradication program. Clinical outbreaks were confirmed using both the direct and indirect immunofluorescence test (and if both were negative, by the hemabsorption test). The serological status of swine was determined by an enzyme-linked immunosorbent assay (ELISA) and suspect serum samples were confirmed by the immunoblot assay.

The number of clinical outbreaks (herds) of ASF for 1989, 1990 and 1991 was 170, 347 and 207, respectively. The numbers of municipalities within each affected province experiencing acute outbreaks for the same time periods were 49, 69 and 48, respectively. Serologically diagnosed animals positive for ASF were 1.1% of animals tested in 1989, 0.5% in 1990 and 0.8% in 1991. The corresponding positive predictive values of the standard ELISA test used were 99.0, 97.9 and 98.8, respectively. Similarly, the number of municipalities within each affected province experiencing serologically positive subclinically infected animals was 269, 178 and 147 for each of the years 1989, 1990 and 1991, respectively.  相似文献