The status of potato fertilization in New York     

E. V. Hardenburg  Daniel Dean  H. R. Talmage  B. E. Brown  H. H. Zimmerly  Thos H. White  H. G. Zuckerman  Ove F. Jensen  P. N. Davis  T. M. McCall 《American Journal of Potato Research》1925,2(12):459-515

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Notes     

Daniel Dean  WM. Stuart  H. O. Werner 《American Journal of Potato Research》1928,5(9):266-274

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Impact of Intracoastal Waterway maintenance dredging on a mud bottom benthos community     

Robert R. Stickney  Daniel Perlmutter 《Biological conservation》1975,7(3):211-225

The effects of hydraulic dredging on the benthic infauna of a mud bottom area were investigated in Georgia in the Atlantic Intracoastal Waterway. Complete displacement of the benthic community was caused by dredging; however, the community began to recover within a month following the cessation of dredging. Within two months the diversity and species composition of the dredged channel were similar to that of a control area and little change in sediment composition resulted. Thus, no apparent limitation was imposed on the normal benthic population by habitat alteration. Recolonisation was too rapid to have been caused by the settling of immature or larval stages from the water column alone. Bank slumping and migration of adult forms have been postulated as other means of recolonisation.  相似文献   

Effect of Fucoidan on the Mitochondrial Membrane Potential (ΔΨm) of Leukocytes from Patients with Active COVID-19 and Subjects That Recovered from SARS-CoV-2 Infection     

Karina Janice Guadalupe Díaz-Resendiz  Carlos Eduardo Covantes-Rosales  Alma Betsaida Benítez-Trinidad  Migdalia Sarahy Navidad-Murrieta  Francisco Fabian Razura-Carmona  Christian Daniel Carrillo-Cruz  Edwin Jaime Frias-Delgadillo  Daniela Alejandra Prez-Díaz  Matxil Violeta Díaz-Benavides  Mercedes Zambrano-Soria  Guadalupe Herminia Ventura-Ramn  Aurelio Romero-Castro  David Alam-Escamilla  Manuel Ivn Girn-Prez 《Marine drugs》2022,20(2)

Fucoidan is a polysaccharide obtained from marine brown algae, with anti-inflammatory, anti-viral, and immune-enhancing properties, thus, fucoidan may be used as an alternative treatment (complementary to prescribed medical therapy) for COVID-19 recovery. This work aimed to determine the ex-vivo effects of treatment with fucoidan (20 µg/mL) on mitochondrial membrane potential (ΔΨm, using a cationic cyanine dye, 3,3′-dihexyloxacarbocyanine iodide (DiOC₆(3)) on human peripheral blood mononuclear cells (HPBMC) isolated from healthy control (HC) subjects, COVID-19 patients (C-19), and subjects that recently recovered from COVID-19 (R1, 40 ± 13 days after infection). In addition, ex-vivo treatment with fucoidan (20 and 50 µg/mL) was evaluated on ΔΨm loss induced by carbonyl cyanide 3-chlorophenylhydrazone (CCCP, 150 µM) in HPBMC isolated from healthy subjects (H) and recovered subjects at 11 months post-COVID-19 (R2, 335 ± 20 days after infection). Data indicate that SARS-CoV-2 infection induces HPBMC loss of ΔΨm, even 11 months after infection, however, fucoidan promotes recovery of ΔΨm in PBMCs from COVID-19 recovered subjects. Therefore, fucoidan may be a potential treatment to diminish long-term sequelae from COVID-19, using mitochondria as a therapeutic target for the recovery of cellular homeostasis.  相似文献   

First account of a transient intersex in spotted scat,Scatophagus argus: a marine gonochoristic fish     

Mustapha  Umar Farouk  Zhi  Fei  Huang  Yuang-Qing  Assan  Daniel  Li  Guang-Li  Jiang  Dong-Neng 《Fish physiology and biochemistry》2022,48(4):1011-1023

Fish Physiology and Biochemistry - This study presents the first incidence of intersex associated with testis-ova in spotted scat (Scatophagus argus) reared in a controlled environment. The...  相似文献   

Effects of varying dietary compositions using common feed ingredients on growth and feed efficiency of pond‐raised channel catfish Ictalurus punctatus (Rafinesque)     

Menghe H Li  Edwin H Robinson  Brian G Bosworth  Daniel F Oberle  Penelope M Lucas 《Aquaculture Research》2010,41(8):1133-1139

Two experiments were conducted to evaluate various ingredient combinations in a 28% or 32% protein diet for optimum performance of channel catfish Ictalurus punctatus. All diets contained soybean meal and corn, but with or without cottonseed meal, wheat middlings or fish meal (FM). Channel catfish fingerlings were stocked into 0.04 ha earthen ponds at 18 530 fish ha^?1. Fish were fed one of eight diets once daily to apparent satiation for two growing seasons. Results demonstrated that the dietary ingredient composition used had significant effects on fish performance, but magnitude of differences was relatively small. Overall, diets containing FM resulted in greater weight gain (Experiments 1 and 2) and lower feed conversion ratio (Experiment 1) than fish fed all‐plant diets. However, certain combinations of plant ingredients provided the similar fish growth as some diets containing FM. There were no significant differences in weight gain between fish fed soybean meal–corn or soybean meal–corn–wheat middlings‐based diets with cottonseed meal or FM. The use of wheat middlings in the diet had no significant effects on fish production characteristics.  相似文献   

The pelagic habitat analysis module for ecosystem‐based fisheries science and management          下载免费PDF全文

Daniel P. Harrison  Michael G. Hinton  Suzanne Kohin  Edward M. Armstrong  Stephanie Snyder  Frank O'Brien  Dale K. Kiefer 《Fisheries Oceanography》2017,26(3):316-335

We have developed a set of tools that operate within an aquatic geographic information system to improve the accessibility, and usability of remote‐sensed satellite and computer‐modeled oceanographic data for marine science and ecosystem‐based management. The tools form the Pelagic Habitat Analysis Module (PHAM), which can be applied as a modeling platform, an investigative aid in scientific research, or utilized as a decision support system for marine ecological management. Applications include fisheries, marine biology, physical and biological oceanography, and marine spatial management. The GIS provides a home for diverse data types and automated tools for downloading remote sensed and global circulation model data. Within the GIS environment, PHAM provides a framework for seamless interactive four‐dimensional visualization, for matching between disparate data types, for flexible statistic or mechanistic model development, and for dynamic application of user developed models for habitat, density, and probability predictions. Here we describe PHAM in the context of ecosystem‐based fisheries management, and present results from case study projects which guided development. In the first, an analysis of the purse seine fishery for tropical tuna in the eastern Pacific Ocean revealed oceanographic drivers of the catch distribution and the influence of climate‐driven circulation patterns on the location of fishing grounds. To support management of the Common Thresher Shark (Alopias vulpinus) in the California Current Ecosystem, a simple empirical habitat utilization model was developed and used to dynamically predict the seasonal range expansion of common thresher shark based on oceanographic conditions.  相似文献   

Most fish destined for fishmeal production are food‐grade fish          下载免费PDF全文

Tim Cashion  Frédéric Le Manach  Dirk Zeller  Daniel Pauly 《Fish and Fisheries》2017,18(5):837-844

Marine fisheries target and catch fish both for direct human consumption (DHC) as well as for fishmeal and fish oil, and other products. We derived the fractions used for each for 1950–2010 by fishing country, and thus provide a factual foundation for discussions of the optimal use of fisheries resources. From 1950 to 2010, 27% (~20 million tonnes annually) of globally reconstructed marine fisheries landings were destined for uses other than DHC. Importantly, 90% of fish destined for uses other than DHC are food‐grade or prime food‐grade fish, while fish without a ready market for DHC make up a much smaller proportion. These findings have implications for how we are using fish to feed ourselves or, more appropriately, how we are not using fish to feed ourselves.  相似文献   

C and N dynamics of a range of biogas slurries as a function of application rate and soil texture: a laboratory experiment     

Anja Sänger  Daniel Geisseler 《Archives of Agronomy and Soil Science》2013,59(12):1779-1794

Digestates vary in composition and studies regarding their impact on C and N dynamics in soils are scarce. The objective was to analyse the C and N dynamics of digestates originating from various substrates applied to a sandy Cambisol and a silty Anthrosol. In three laboratory experiments (4–6 weeks), the effects of digestate properties, N rate and water content were tested. Averaged over both soils, 21% of the C supplied was emitted as CO₂. Potential NH₃ emissions during the first week ranged between 6% and 12% of NH₄⁺ present in the digestates. The emission factors in the sandy Cambisol were on average 1.2 and 2 times higher for CO₂ and potential NH₃, respectively, compared to the silty Anthrosol. Similarly, net nitrogen mineralization in the sandy Cambisol was approximately twice the N mineralized in the silty Anthrosol. Net nitrification was not influenced by soil texture or different digestates, but increased with increasing application rates and had highest values at 75% of water holding capacity. Our results indicate that the type of substrate input for anaerobic digestion influences the properties of the digestate and therefore the dynamics of C and N. However, soil texture can affect these dynamics markedly.  相似文献   

TRANS-SPLENIC PORTAL SCINTIGRAPHY IN NORMAL DOGS     

Robert C Cole  Federica Morandi  James Avenell  Gregory B Daniel 《Veterinary radiology & ultrasound》2005,46(2):146-152

The purpose of this study was to (1) establish a technique for ultrasound-guided trans-splenic portal scintigraphy (TSPS) using 99mTcO4(-), (2) evaluate portal vein morphology, (3) compare the radiation exposures for TSPS vs. per-rectal portal scintigraphy (PRPS), and (4) compare the quality of numerical data from the TSPS vs. PRPS. Eight juvenile dogs underwent PRPS and TSPS (minimum of 48h between studies) after initial screening tests. PRPS was done according to established protocol using 425 +/- 36MBq (mean +/- SD) of 99mTcO4(-). TSPS was done with the dogs in right lateral recumbency over the gamma camera. 99mTcO4(-) (57 +/- 13.9 MBq) was injected into the spleen 1-2s following initiation of the dynamic acquisition. The frame rate was 4 frames/s for 5 min. There was significantly lower radioactivity of 99mTcO4(-) given and significantly higher total counts recorded in the liver and heart during the TSPS compared with PRPS. The total counts for the TSPS and PRPS were 7120 +/- 4386 and 830 +/- 523, respectively. Percent absorption from the spleen was 52.5 +/- 19.1% compared with 9.2 +/- 5.7% for the colon. Calculated transit time for the TSPS studies was 7 +/- 2.3s. In TSPS studies, the splenic and portal veins were clearly identified. Radiation exposure levels of the dogs were significantly lower following TSPS than after PRPS. TSPS appears superior to PRPS as a method to image the portal venous system representing a valid alternative diagnostic test for animals with suspected portosystemic shunts.  相似文献