Interactions between lipid metabolism and the microbiome in aquatic organisms: A review.

Marine organisms' lipid metabolism contributes to marine ecosystems by producing a variety of lipid molecules. Historically, research focused on the lipid metabolism of the organisms themselves. Recent microbiome studies, however, have revealed that gut microbial communities influence the amount and type of lipids absorbed by organisms, thereby altering the organism's lipid metabolism.

Oxidative stress-mediated deleterious effects of hypoxia in the brackish water flea Diaphanosoma celebensis.

In this study, we investigated the acute toxicity, in vivo effects, oxidative stress, and gene expression changes caused by hypoxia on the brackish water flea Diaphanosoma celebensis. The no-observed-effect concentration (NOEC) of 48 h of hypoxia exposure was found to be 2 mg/L O. Chronic exposure to NOEC caused a significant decline in lifespan but had no effect on total fecundity.

Toxicity and speciation of inorganic arsenics and their adverse effects on in vivo endpoints and oxidative stress in the marine medaka Oryzias melastigma.

Here, we investigate the effects of acute and chronic exposure to arsenate (AsV) and arsenite (AsIII) in the marine medaka Oryzias melastigma. In vivo effects, biotransformation, and oxidative stress were studied in marine medaka exposed to the two inorganic arsenics for 4 or 28 days. An investigation of embryonic development revealed no effect on in vivo parameters, but the hatching rate increased in the group exposed to AsIII.

Transgenerational adaptation to ocean acidification determines the susceptibility of filter-feeding rotifers to nanoplastics.

The adaptation of marine organisms to the impending challenges presented by ocean acidification (OA) is essential for their future survival, and mechanisms underlying OA adaptation have been reported in several marine organisms. In the natural environment, however, marine organisms are often exposed to a combination of environmental stressors, and the interactions between adaptive responses have yet to be elucidated. Here, we investigated the susceptibility of filter-feeding rotifers to short-term (ST) and long-term (LT) (≥180 generations) high CO conditions coupled with nanoplastic (NPs) exposure (ST+ and LT+).

Towards vibrant fish populations and sustainable fisheries that benefit all: learning from the last 30 years to inform the next 30 years.

A common goal among fisheries science professionals, stakeholders, and rights holders is to ensure the persistence and resilience of vibrant fish populations and sustainable, equitable fisheries in diverse aquatic ecosystems, from small headwater streams to offshore pelagic waters. Achieving this goal requires a complex intersection of science and management, and a recognition of the interconnections among people, place, and fish that govern these tightly coupled socioecological and sociotechnical systems. The World Fisheries Congress (WFC) convenes every four years and provides a unique global forum to debate and discuss threats, issues, and opportunities facing fish populations and fisheries.

Effects of temperature and combinational exposures on lipid metabolism in aquatic invertebrates.

Studies of changes in fatty acids in response to environmental temperature changes have been conducted in many species, particularly mammals. However, few studies have considered aquatic invertebrates, even though they are particularly vulnerable to changes in environmental temperature. In this review, we summarize the process by which animals synthesize common fatty acids and point out differences between the fatty acid profiles of vertebrates and those of aquatic invertebrates.

Comparative genome analysis of the monogonont marine rotifer Brachionus manjavacas Australian strain: Potential application for ecotoxicology and environmental genomics.

This is the first study to analyze the whole-genome sequence of B. manjavacas Australian (Aus.) strain through combination of Oxford Nanopore long-read seq, resulting in a total length of 108.

Iron reproductive toxicity of marine rotifer sibling species: Adaptation to temperate and tropical habitats.

Iron (Fe), a trace metal in coastal waters has increased significantly due to anthropogenic activities, however, few studies have examined its toxicity to marine organism reproduction and associated mechanisms. We employed two marine rotifers, the temperate Brachionus plicatilis, and tropical B. rotundiformis to investigate the toxicity of iron (FeSO•7HO) and its deleterious effects on reproductive features in females (sexual fecundity, abnormal resting eggs, and swimming speed) and males (lifespan, swimming speed, and spermatozoa quality) under lethal and sub-lethal exposure.

The Genome of the Marine Rotifer Brachionus manjavacas: Genome-Wide Identification of 310 G Protein-Coupled Receptor (GPCR) Genes.

The marine rotifer Brachionus manjavacas is widely used in ecological, ecotoxicological, and ecophysiological studies. The reference genome of B. manjavacas is a good starting point to uncover the potential molecular mechanisms of responses to various environmental stressors.

The genome of the freshwater monogonont rotifer Brachionus rubens: Identification of phase I, II, and III detoxification genes.

Monogonont rotifers are common species in aquatic environments and make model species for ecotoxicology studies. Whole genomes of several species of the genus Brachionus have been assembled, but no information on the freshwater rotifer Brachionus rubens has been reported. In this study, the whole-genome sequence of B.

Identification and characterization of homeobox gene clusters in harpacticoid and calanoid copepods.

In this study, we have identified the entire complement of typical homeobox (Hox) genes (Lab, Pb, Dfd, Scr, Antp, Ubx, Abd-A, and Abd-B) in harpacticoid and calanoid copepods and compared them with the cyclopoid copepod Paracyclopina nana. The harpacticoid copepods Tigriopus japonicus and Tigriopus kingsejongensis have seven Hox genes (Lab, Dfd, Scr, Antp, Ubx, Abd-A, and Abd-B) and the Pb and Ftz genes are also present in the cyclopoid copepod P. nana.

Genome-wide identification of 216 G protein-coupled receptor (GPCR) genes from the marine water flea Diaphanosoma celebensis.

G protein-coupled receptors (GPCRs) are considered to have originated from early evolution of eukaryotic species, therefore, the genome-wide identification of GPCR genes can provide insight into the adaptive strategy and evolutionary tendency in an animal taxon. Here, we identified a total 216 full-length GPCR genes in the marine water flea Diaphanosoma celebensis genome, which were classified into five distinct classes (A, B, C, F, and other). Phylogenetic comparison of GPCRs in D.

The genome of the minute marine rotifer Proales similis: Genome-wide identification of 401 G protein-coupled receptor (GPCR) genes.

The minute marine rotifer Proales similis is a potential model species for ecotoxicological and ecophysiological studies. Therefore, the provision of whole-genome data for P. similis is an easy way to deepen understanding of the molecular mechanisms involved in response to various environmental stressors.

Complete mitochondrial genomes of two marine monogonont rotifer strains.

The complete mitochondrial genomes of German strain were 10,721 bp (mitochondrial DNA I) and 12,274 bp (mitochondrial DNA II) in size, while the complete mitochondrial genomes of Australian strain were 10,889 bp (mitochondrial DNA I) and 12,443 bp (mitochondrial DNA II) in size. Of 12 protein-coding genes (PCGs), 99.6% of amino acid sequences were identical between the two strains.

The genome of the euryhaline rotifer Brachionus paranguensis: Potential use in molecular ecotoxicology.

Brachionus spp. rotifers have been proposed as model organisms for ecotoxicological studies. We analyzed the whole-genome sequence of B.

Species-specific effects of iron on temperate and tropical marine rotifers in reproduction, lipid and ROS metabolisms.

Two euryhaline rotifers, the temperate species Brachionus plicatilis and tropical species Brachionus rotundiformis, were used to investigate the effects of iron (FeSO·7HO), an essential trace metal, on reproductive patterns and lifetables, including the metabolism of lipid and reactive oxygen species (ROS). B. plicatilis was more sensitive to iron with regard to sexual reproduction.

The genome of the freshwater monogonont rotifer Brachionus angularis: Identification of phase I, II, and III detoxification genes and their roles in molecular ecotoxicology.

Brachionus spp. rotifers, which are widely distributed in aquatic environments, have been proposed as model organisms for ecotoxicological studies. Although the genomes of several rotifers belonging to the genus Brachionus have been assembled, the genome for the freshwater rotifer Brachionus angularis remains unknown.

The genome of the European estuarine calanoid copepod Eurytemora affinis: Potential use in molecular ecotoxicology.

In this study, we sequenced and assembled the genome of a European estuarine calanoid copepod using Oxford Nanopore PromethION and Illumina HiSeq 2500 platforms. The length of the assembled genome was 776.1 Mb with N50 = 474.

The genome of the marine water flea Diaphanosoma celebensis: Identification of phase I, II, and III detoxification genes and potential applications in marine molecular ecotoxicology.

To assemble the genome of the marine water flea Diaphanosoma celebensis, a sentinel model for marine environmental monitoring, we constructed a high-quality genome using PromethION and HiSeq 2500 platforms. The total length of the assembled genome was 100.08 Mb, with N50 = 2.

Complete mitochondrial genome of the freshwater monogonont rotifer (Rotifera, Brachionidae).

The two complete mitochondrial genomes were sequenced from the freshwater monogonont rotifer . The mitochondrial genome sequences were 10,764 bp (mitochondrial DNA I) and 12,238 bp (mitochondrial DNA II) in size, respectively. The gene structure and its orientation of 12 protein-coding genes (PCGs) of complete mitochondrial genomes of was identical to those shown in other marine rotifers and the freshwater rotifer , but was different from the freshwater rotifer .

Complete mitochondrial DNA of the marine water flea (Cladocera, Sididae).

The complete mitochondrial genome was sequenced from the marine water flea . The sequenced mitochondrial genome size was 17,060 bp, possessing identical gene order of 13 protein-coding genes (PGCs) to those of the congeneric freshwater species in the genus . The mitochondrial genome of had 13 PGCs, two rRNAs, and 22 tRNAs.

Complete mitochondrial genome of the euryhaline monogonont rotifer (Rotifera, Brachionidae).

The two complete mitochondrial genomes were sequenced from the euryhaline monogonont rotifer . The mitochondrial genome sequences were 11,603 bp and 12,901 bp in size, and the gene order of 12 protein-coding genes (PCGs) were identical to those of the marine rotifer , but the positions of some tRNAs (e.g.

Complete mitochondrial genome of the freshwater monogonont rotifer (Rotifera, Brachionidae).

The two complete mitochondrial genomes were sequenced from the freshwater monogonont rotifer . The genome sequences were 12,041 bp and 13,793 bp in size, and the gene order and contents were identical to those of the freshwater rotifer China, but were different in three tRNA-Arg, tRNA-Ile, and tRNA-Leu between both mitochondrial genomes, while had peculiar gene order in mitochondrial DNA I. Of 12 protein-coding genes (PCGs), one gene () had incomplete stop codons.

Genome-wide identification and transcriptional modulation of histone variants and modification related genes in the low pH-exposed marine rotifer Brachionus koreanus.

Histone modification is considered to be a major epigenetic control mechanism. These modifications (e.g.