Results 41 to 50 of about 814 (164)

A Plankton Detection Method Based on Neural Networks and Digital Holographic Imaging

Chemosensors, 2022
Detecting marine plankton by means of digital holographic microscopy (DHM) has been successfully deployed in recent decades; however, in most previous studies, the identification of the position, shape, and size of plankton has been neglected, which may ...
Kaiqi Lang, Hui Cai, Xiaoping Wang
doaj   +1 more source

First Strike: Description of the Events at the First Salmon Farm Affected by the 2025 Algal Bloom in Northern Norway

Journal of Fish Diseases, Volume 49, Issue 8, August 2026.
ABSTRACT Harmful algal blooms (HABs) are a threat to fish welfare, occurring suddenly and unexpectedly causing significant consequences for fish and salmon farmers worldwide. Norwegian farmers have been facing this challenge at irregular intervals since the very beginning of the industry. This report describes the events on the first fish farm affected
Julie Seem, Mirjam Nikoline Petterson, Tore Seternes, Pål Furset Lader, Julie Christine Svendsen, Lars‐Johan Naustvoll, Lars Helge Stien   +6 more
wiley   +1 more source

An updated view on the long‐term survival and significance of marine protist resting stages

Limnology and Oceanography Letters, Volume 11, Issue 4, July 2026.
Abstract Resting stages of protists act as biological time capsules when buried in marine sediments, preserving viable cells that enable the study of ecological and evolutionary processes across timescales. Recent studies have extended the known viability in diatoms to several millennia and in dinoflagellates to over a century, while also identifying ...
Sanne Mariël Moedt, Sofia Ribeiro
wiley   +1 more source

Probabilistic models for harmful algae: application to the Norwegian coast

Environmental Data Science
We have developed probabilistic models to estimate the likelihood of harmful algae presence and outbreaks along the Norwegian coast, which can help optimization of the national monitoring program and the planning of mitigation actions.
Edson Silva, Julien Brajard, François Counillon, Lasse H. Pettersson, Lars Naustvoll   +4 more
doaj   +1 more source

Comparative gene expression in toxic versus non-toxic strains of the marine dinoflagellate Alexandrium minutum

BMC Genomics, 2010
Background The dinoflagellate Alexandrium minutum typically produces paralytic shellfish poisoning (PSP) toxins, which are known only from cyanobacteria and dinoflagellates. While a PSP toxin gene cluster has recently been characterized in cyanobacteria,
Glöckner Gernot, Beszteri Sára, John Uwe, Yang Ines, Krock Bernd, Goesmann Alexander, Cembella Allan D   +6 more
doaj   +1 more source

In Vitro Effects of Paralytic Shellfish Toxins and Lytic Extracellular Compounds Produced by Alexandrium Strains on Hemocyte Integrity and Function in Mytilus edulis

Toxins, 2021
Harmful effects caused by the exposure to paralytic shellfish toxins (PSTs) and bioactive extracellular compounds (BECs) on bivalves are frequently difficult to attribute to one or the other compound group. We evaluate and compare the distinct effects of
Virginia Angélica Bianchi, Ulf Bickmeyer, Urban Tillmann, Bernd Krock, Annegret Müller, Doris Abele   +5 more
doaj   +1 more source

Grazer‐induced bioluminescence and toxicity in marine dinoflagellates

Limnology and Oceanography, Volume 70, Issue 12, Page 3769-3783, December 2025.
Abstract Marine copepods are the most abundant multicellular zooplankton in the global oceans. They imprint their surrounding waters with a unique bouquet of chemical compounds, including polar lipids such as copepodamides. Prey organisms can detect copepodamides and respond by inducing defensive traits including bioluminescence, toxin production ...
Paula Gonzalo‐Valmala, Milad Pourdanandeh, Sandra Lage, Erik Selander   +3 more
wiley   +1 more source

Algicidal Properties of Microbial Fermentation Products on Inhibiting the Growth of Harmful Dinoflagellate Species

Fermentation, 2022
The fermentation processes of algicidal bacteria offer an eco-friendly and promising approach for controlling harmful algae blooms (HABs). The strain Ba3, previously isolated and identified as Bacillus sp., displays robust algicidal activity against HABs
Barathan Balaji-Prasath, Ying Wang, Yuping Su, Minghua Chen, Yi Zheng   +4 more
doaj   +1 more source

The Harmful Cyanobacterium Microcystis aeruginosa Differently Affects the Growth Rate and Photosynthetic Efficiency of Several Species of Marine Phytoplankton

Environmental Microbiology Reports, Volume 17, Issue 2, April 2025.
The growth rates of some marine phytoplankton commonly found in estuaries were affected by Microcystis aeruginosa. Among them, Akashiwo sanguinea, which was most impacted, experienced varying effects depending on the exposure time and concentrations of M. aeruginosa cells. Our results suggest that introduced M.
Na Yun Park, Hyun Soo Choi, Sang Uk Kang, An Suk Lim   +3 more
wiley   +1 more source

Marine Diatom Skeletonema costatum Dietary Supplementation Improves Growth, Immunological Responses, Antioxidant Activities, Gene Expressions, and Digestive Enzymes of Shrimp Litopenaeus vannamei

Aquaculture Nutrition, Volume 2025, Issue 1, 2025.
This work highlighted the impact of dry concentrations (0, 1, 2, and 4 g/kg diet) of the marine diatom species Skeletonema costatum (SK0%, SK0.1%, SK0.2%, and SK0.4%, respectively) as an aquafeed additive on the postlarvae of Pacific whiteleg shrimp (Litopenaeus vannamei). During an 8‐week feeding trial, the impact of S.
Mohamed Ashour, Einar Ringø, Mohamed M. Mabrouk, Ahmed I. A. Mansour, Mohammed A. E. Naiel, Abdallah Tageldein Mansour, Rabee M. A. Gheetas, Ehab Mohamed, Ahmed F. Abdelhamid, Lee Seong Wei   +9 more
wiley   +1 more source