U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Publication Year 2019 Remove constraint Publication Year: 2019 Subject Gonyaulax Remove constraint Subject: Gonyaulax Subject term Gonyaulax Remove constraint Subject term: Gonyaulax
Start Over

Search

12  Search Results

1 - 12 of 12
Number of results to display per page

Search Results

1. Analytical screening of marine algal toxins for seafood safety assessment in a protected Mediterranean shallow water environment

Author:
Monica Mattarozzi; Antonella Cavazza; Anna Calfapietra; Monica Cangini; Silvia Pigozzi; Federica Bianchi; Maria Careri
Source:
Food additives & contaminants 2019 v.36 no.4 pp. 612-624
ISSN:
1944-0057
Subject:
Alexandrium; European Union; Gonyaulax; amnesic shellfish poisoning; aquaculture; breeding sites; clams; coasts; disease severity; ecosystems; farms; food safety; imines; lakes; lipophilicity; liquid chromatography; mass spectrometry; microalgae; monitoring; multiresidue analysis; mussels; natural toxicants; paralytic shellfish poisoning; phytoplankton; safety assessment; screening; seafoods; shellfish; toxicity; yessotoxin; Sicily
Abstract:
... Microalgal species growing in marine and aquaculture environments can be responsible for harmful events because of their ability to produce potent natural toxins that can accumulate in edible mollusc species. Their consumption can cause severe illness and even be lethal. The European Union provides comprehensive regulations covering various general food safety aspects to manage the risk of contami ...
DOI:
10.1080/19440049.2019.1581380

2. Biotic interaction as the triggering factor for blooms under favourable conditions in tropical estuarine systems

Author:
Samiksha Prabhudessai; C. R. Vishal; C. U. Rivonker
Source:
Environmental monitoring and assessment 2019 v.191 no.2 pp. 54
ISSN:
0167-6369
Subject:
Alexandrium minutum; Bacillariophyceae; Cochlodinium; Gonyaulax; Prorocentrum; algal blooms; allelopathy; biocenosis; coasts; ecological function; estuaries; marine environment; monsoon season; nitrates; phosphates; salinity; toxicity; India
Abstract:
... The formation of harmful algal blooms (HABs) in the marine environment is detrimental to the ecosystem function affecting the sequence of biological events. Hence, the present study is focused on the seasonal distribution of HAB-forming diatoms and dinoflagellates and their ecological interactions in two tropical estuaries, namely Chapora and Sal in the west coast of India. A total of 17 species o ...
DOI:
10.1007/s10661-018-7172-7

3. Changes in community structure and photosynthetic activities of total phytoplankton species during the growth, maintenance, and dissipation phases of a Prorocentrum donghaiense bloom

Author:
Anglu Shen; Joji Ishizaka; Mengmeng Yang; Longling Ouyang; Yane Yin; Zengling Ma
Source:
Harmful algae 2019 v.82 pp. 35-43
ISSN:
1568-9883
Subject:
Bacillariophyceae; Coscinodiscus; Cyclotella; Gonyaulax; Prorocentrum; algal blooms; chlorophyll; coastal water; community structure; dominant species; electron transfer; islands; photosynthesis; phytoplankton; poisonous algae; prediction; seawater; surveys
Abstract:
... The potential interactions between the bloom-forming dinoflagellates and other phytoplankton during the algal bloom cycle are interesting, while the causes for the phytoplankton community changes were not fully understood. We hypothesized that phytoplankton community structure and photosynthetic activities of total phytoplankton have their special characteristics in different phases of the algal b ...
DOI:
10.1016/j.hal.2018.12.007

4. Contamination status of lipophilic marine toxins in shellfish samples from the Bohai Sea, China

Author:
Yang Liu; Ren-Cheng Yu; Fan-Zhou Kong; Chen Li; Li Dai; Zhen-Fan Chen; Hui-Xia Geng; Ming-Jiang Zhou
Source:
Environmental pollution 2019 v.249 pp. 171-180
ISSN:
0269-7491
Subject:
Dinophysis acuminata; Dinophysis fortii; Gonyaulax; Prorocentrum; aquaculture; azaspiracid; clams; lipophilicity; liquid chromatography; monitoring; mussels; okadaic acid; oysters; poisonous algae; scallops; seafoods; seasonal variation; shellfish; tandem mass spectrometry; yessotoxin; China; Yellow Sea
Abstract:
... Lipophilic marine toxins in shellfish pose significant threats to the health of seafood consumers. To assess the contamination status of shellfish by lipophilic marine toxins in the Bohai Sea, nine species of shellfish periodically collected from five representative aquaculture zones throughout a year were analyzed with a method of liquid chromatography-tandem mass spectrometry (LC–MS/MS). Lipophi ...
DOI:
10.1016/j.envpol.2019.02.050

5. Devastating farmed abalone mortalities attributed to yessotoxin-producing dinoflagellates

Author:
Grant C. Pitcher; Charles J. Foord; Brett M. Macey; Lisa Mansfield; Anna Mouton; Marie E. Smith; Steven J. Osmond; Lynndal van der Molen
Source:
Harmful algae 2019 v.81 pp. 30-41
ISSN:
1568-9883
Subject:
Gonyaulax; abalone; chlorophyll; color; death; epithelial cells; epithelium; farms; financial economics; gills; harvesting; inflammation; light microscopy; mollusc culture; mortality; necrosis; phylogeny; plankton; poisonous algae; ribosomal DNA; yessotoxin; South Africa
Abstract:
... A large dinoflagellate bloom in Walker Bay (South Africa) in January 2017 impacted 3 land-based abalone farms resulting in the death of several million animals. Satellite-derived images of Chl-a from the Ocean and Land Colour Imager (OLCI) on board the European Space Agency Sentinel-3 A showed bloom initiation in late December 2016 and dispersal in mid-February 2017. The bloom was dominated by two ...
DOI:
10.1016/j.hal.2018.11.006

6. Distribution of harmful dinoflagellate cysts in the surface sediments of Daya Bay of the South China Sea and their relationship to environmental factors

Author:
Ying Li; Ya-Nan Tang; Ping-Ping Shen; Gang Li; Ye-Hui Tan
Source:
International biodeterioration & biodegradation 2019 v.139 pp. 44-53
ISSN:
0964-8305
Subject:
Alexandrium minutum; Gonyaulax; Gymnodinium; algal blooms; cluster analysis; environmental factors; particle size; risk; salinity; seawater; sediments; temperature; toxicity; South China Sea
Abstract:
... To investigate the distribution of dinoflagellate cyst and their relationship with environmental factors, surface sediments were collected from 14 stations of Daya Bay of the South China Sea. In total, 44 cyst species and 3 uncertain taxa were identified and the total abundance ranged from 79 to 819 cysts g−1 dry weight (DW), showing a decreasing trend from the north-west to the south-east of the ...
DOI:
10.1016/j.ibiod.2019.02.006

7. Dinoflagellates in tropical estuarine waters from the Maraú River, Camamu Bay, northeastern Brazil

Author:
Caio Ceza da Silva Nunes; Sylvia Maria Moreira Susini-Ribeiro; Kaoli Pereira Cavalcante
Source:
Check list 2019 v.15 no.5 pp. 951-963
ISSN:
1809-127X
Subject:
Dinophysis caudata; Gonyaulax; Prorocentrum; estuaries; plankton; rivers; shellfish; species richness; Brazil
Abstract:
... Dinoflagellates display great diversity in tropical regions and play an important role in the complex microbial food webs of marine and brackish environments. The goal of this study is to identify planktonic dinoflagellates and their distribution in the estuary of the Maraú River, Camamu Bay, state of Bahia, in a region with increasing use of shellfish farming. Samples were carried out monthly fro ...
DOI:
10.15560/15.5.951

8. Harmful phytoplankton in the Beagle Channel (South America) as a potential threat to aquaculture activities

Author:
Gastón O. Almandoz; Adrián O. Cefarelli; Soledad Diodato; Nora G. Montoya; Hugo R. Benavides; Mario Carignan; Marcelo Hernando; Elena Fabro; Katja Metfies; Nina Lundholm; Irene R. Schloss; Marcela Álvarez; Martha E. Ferrario
Source:
Marine pollution bulletin 2019 v.145 pp. 105-117
ISSN:
0025-326X
Subject:
Alexandrium catenella; Alexandrium tamarense; Azadinium; Bacillariophyceae; Dinophysis acuminata; Gonyaulax; algal blooms; biomass; domoic acid; microalgae; mollusc culture; neurotoxins; phylogeny; phytoplankton; poisonous algae; taxonomy; toxicity; water pollution; South America
Abstract:
... The Beagle Channel is a remote subantarctic environment where mussel aquaculture initiatives have existed since the early 1990s. Here we analyze phytoplankton biomass and composition, and the occurrence of harmful microalgae species and their toxins at three sites during the period 2015–2016. The occurrence of potentially harmful algae was observed throughout the study period, including toxigenic ...
DOI:
10.1016/j.marpolbul.2019.05.026

9. Phylogenetic analysis and yessotoxin profiles of Gonyaulax spinifera cultures from the Benguela Current upwelling system

Author:
Chibo Chikwililwa; Pearse McCarron; Joanna J. Waniek; Detlef E. Schulz-Bull
Source:
Harmful algae 2019 v.85 pp. 101626
ISSN:
1568-9883
Subject:
Gonyaulax; algal blooms; coasts; euphotic zone; hydroxylation; liquid chromatography; mass spectrometry; molecular genetics; oceans; phylogeny; phytoplankton; poisonous algae; primary productivity; toxicity; yessotoxin; Italy; Namibia; New Zealand
Abstract:
... The Benguela Current in the Atlantic is one of the four major upwelling systems on the Eastern boundary of the world ocean. Thus the coastal regions off Namibia are prone to high primary productivity that can lead to Harmful Algae Blooms as this nutrient rich water reaches the euphotic zone. Yessotoxins (YTXs) produced by G. spinifera were detected in Namibian phytoplankton field samples in 2011. ...
DOI:
10.1016/j.hal.2019.101626

10. Should Gonyaulax hyalina and Gonyaulax fragilis (Dinophyceae) remain two different taxa?

Author:
M. Consuelo Carbonell-Moore; Kenneth Neil Mertens
Source:
Phycologia 2019 v.58 no.6 pp. 685-689
ISSN:
2330-2968
Subject:
Gonyaulax; fields; oceans; sampling
Abstract:
... Escalera et al. (2018. Phycologia 57: 453–464) concluded that Gonyaulax hyalina and G. fragilis were the same species. Here, the morphologies of G. hyalina and G. fragilis were restudied in field samples from different parts of the World Ocean. Results showed that Escalera et al. did not observe G. fragilis, as all strains used in their study belong to one species, G. hyalina. In consequence, it i ...
DOI:
10.1080/00318884.2019.1663477

11. Structure Elucidation and Relative Toxicity of (24R)-24-Hydroxyyessotoxin from a Namibian Isolate of Gonyaulax spinifera

Author:
Isabelle Rajotte; Cheryl Rafuse; Elliott J. Wright; John C. Achenbach; Lee D. Ellis; Pearse McCarron
Source:
Journal of natural products 2019 v.82 no.7 pp. 1945-1952
ISSN:
1520-6025
Subject:
Danio rerio; Gonyaulax; biomass; hydroxylation; liquid chromatography; mass spectrometry; nuclear magnetic resonance spectroscopy; solvents; toxicity; yessotoxin
Abstract:
... Liquid chromatography–high-resolution mass spectrometry (LC-HRMS) analysis of a Namibian strain of Gonyaulax spinifera showed the presence of a number of yessotoxins (YTXs). Principal among these were YTX (1), homoYTX (2), and a tentative hydroxylated analogue that did not correspond to any previously confirmed YTX structures. Culturing the G. spinifera strain afforded sufficient biomass for purif ...
DOI:
10.1021/acs.jnatprod.9b00318

12. A checklist of the benthic and epiphytic marine dinoflagellates of New Zealand, including Rangitāhua/Kermadec Islands

Author:
Lesley Rhodes; Kirsty F. Smith
Source:
New Zealand journal of marine and freshwater research 2019 v.53 no.2 pp. 258-277
ISSN:
1175-8805
Subject:
Alexandrium; Amphidinium; Azadinium; Bacillariophyceae; Blastodinium; Crypthecodinium; Dinophysis; Gambierdiscus; Gonyaulax; Gymnodinium; Heterocapsa; Karenia; Pfiesteria; Prorocentrum; Symbiodinium; algal blooms; ciguatera; epiphytes; fish; high-throughput nucleotide sequencing; islands; microscopy; new geographic records; plankton; poisoning; sediments; species diversity; toxicity; toxins; New Zealand
Abstract:
... New Zealand benthic and epiphytic dinoflagellate records increased in recent years as harmful algal bloom research increased. This was largely due to risk assessments of micro-algal biotoxins for the seafood industry and concerns regarding ciguatera fish poisoning in humans from toxic finfish. High-throughput sequencing enabled the detection of dinoflagellate species that were previously overlooke ...
DOI:
10.1080/00288330.2018.1492425