Marine & Freshwater Biology

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Article Fisheries

High incidence of multiple intI1 genomic gene cassettes in Aeromonas strains

Bo Ling, Wei Feng, Nuo Yang, Lixia Fan, Guiying Guo, Xuesong Li, Jifeng Zeng, Jiping Zheng

Summary: This study revealed the high prevalence of multidrug-resistant strains of Aeromonas in bullfrog aquaculture, with Class 1 integrons containing multiple gene cassettes encoding resistance to various antibiotics. Three novel intI1 gene cassettes or arrays were also identified.

AQUACULTURE (2024)

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Article Fisheries

Growth performance and physiological responses of striped catfish (Pangasianodon hypophthalmus) under different carbohydrates supplemented biofloc aquaculture systems

Taranpreet Singh, Amit Mandal, Shanthanagouda Admane Holeyappa, Sachin Onkar Khairnar, Anuj Tyagi

Summary: Biofloc technology is gaining popularity in inland aquaculture due to limited water resources and high land costs. This study investigated the effect of different carbohydrate sources on the health and growth of striped catfish fingerlings. The results showed that the addition of carbohydrates improved water quality, fish performance, and health. In particular, jaggery supplementation enhanced biofloc volume and significantly improved fish growth.

AQUACULTURE (2024)

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Article Fisheries

Identification of new Vibrio campbellii strains harboring the pVA1 plasmid isolated from Penaeus vannamei postlarvae affected by outbreaks of acute hepatopancreatic necrosis disease (AHPND) in Mexico

Sonia A. Soto-Rodriguez, Bruno Gomez-Gil, Rodolfo Lozano-Olvera, Karla G. Aguilar-Rendon, Jean P. Gonzalez-Gomez

Summary: This study reports on the clinical signs, histopathological lesions, bacteriological analyses, and whole-genome sequencing of three natural outbreaks of AHPND in Mexican shrimp postlarvae. The researchers identified two new Vibrio species and found that the pVA1-like plasmids carried by Vibrio campbellii strains are responsible for causing AHPND in commercial hatcheries.

AQUACULTURE (2024)

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Article Fisheries

Accurate genomic selection using low-density SNP panels preselected by maximum likelihood estimation

Shiyu Qu, Sheng Lu, Yang Liu, Ming Li, Songlin Chen

Summary: The study developed a method called MLE-rank for preselecting a set of SNPs for genomic selection. MLE-rank showed superior performance in reducing the number of SNPs while maintaining prediction accuracy, compared to uniform distribution and GWAS preselection methods.

AQUACULTURE (2024)

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Article Fisheries

Molecular biomarkers for sperm quality in an economically important fish: Blue catfish, Ictalurus furcatus

Hana N. Hess, Marie E. Strader, Helen R. Montague, Timothy J. Bruce, Gavin L. Aguilar, Sune R. Sorensen, Laura E. Jenkins, Luke A. Roy, Rex A. Dunham, Ian A. E. Butts

Summary: Intraspecies variability in sperm quality is common among aquaculture species, and there is an urgent need to establish reliable molecular biomarkers for screening males with high-quality sperm. In this study, gene expression biomarkers of sperm quality in channel catfish blue catfish hybrids were identified, which may be applied to improve catfish aquaculture efficiency.

AQUACULTURE (2024)

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Article Fisheries

Transcriptome-derived SNP markers for population assignment of sandfish, Holothuria (Metriatyla) scabra

June F. Ordonez, Rachel Ravago-Gotanco

Summary: The sandfish, a commercially important fishery and aquaculture species, is experiencing a decline in natural populations due to overfishing. This study developed and evaluated the use of gene-associated SNP markers to accurately assign sandfish to their population of origin, providing a valuable tool for sandfish aquaculture, fisheries management, and conservation.

AQUACULTURE (2024)

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Article Fisheries

Novel chitinolytic Bacillus spp. increase feed efficiency, feed digestibility, and survivability to Vibrio anguillarum in European seabass fed with diets containing Hermetia illucens larvae meal

F. Rangel, M. Monteiro, R. A. Santos, D. Ferreira-Martins, R. Cortinhas, L. Gasco, F. Gai, P. Pousao-Ferreira, A. Couto, A. Oliva-Teles, C. R. Serra, P. Enes

Summary: Insect meals have potential as a sustainable protein source, but the chitin content may hinder fish performance and nutrient availability. This study found that using carbohydrolytic sporeforming probiotics to enhance chitin digestion improved fish growth performance and digestibility. The inclusion of these probiotics also increased plasma N-acetylglucosamine levels and gene expressions related to GlcNAc metabolism, indicating a potential mechanism for improved protein O-GlcNAcylation. Furthermore, the probiotics also enhanced the fish's resistance against a bacterial infection. This research highlights the potential of using probiotics to overcome chitin-related challenges in aquaculture.

AQUACULTURE (2024)

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Article Fisheries

Tyramine mediates growth performance, immune response, and physiological regulation of Litopenaeus vannamei through dietary administration

Hsin-Wei Kuo, Li-Yang Hsu, Wei-Yang Su, Winton Cheng

Summary: This study investigated the effects of feeding diets containing tyramine to Litopenaeus vannamei on growth performance, immune parameters, metabolic processes, and resistance against Vibrio alginolyticus. The results showed that feeding shrimp with tyramine-containing diets improved feed efficiency, weight gain, immune activity, and resistance against bacterial infection.

AQUACULTURE (2024)

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Article Fisheries

Governing sociocultural sustainability through standards: Evidence from aquaculture eco-certification schemes

Choyon Kumar Saha

Summary: This study explores the extent to which sociocultural principles are included in aquaculture certification standards and finds that current standards focus more on health and well-being issues while neglecting ethical practices and issues affecting indigenous peoples and local communities. The study also compares several certification standards and concludes that some standards are weaker in addressing sociocultural sustainability. The exclusion and lack of attention to crucial sociocultural issues in certification standards can potentially undermine the goal of ensuring sociocultural sustainability in aquaculture.

AQUACULTURE (2024)

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Article Fisheries

Genome-wide association study identifies candidate SNPs and genes associated with red-spotted grouper nervous necrosis virus infection of the giant grouper (Epinephelus lanceolatus)

Xuzhuo Duan, Kaishan Liang, Min Yang, Minlin Zhang, Xiaoling Zuo, Xianze Jia, Zongyang Li, Jie Yu, Liyuan Luo, Jinhong Shan, Huihong Zhao, Yong Zhang, Qiwei Qin, Qing Wang

Summary: The study conducted a genome-wide association study on the resistance of giant groupers to red-spotted grouper nervous necrosis virus (RGNNV), identifying SNP loci and candidate genes that are significantly associated with RGNNV resistance. G protein-coupled receptor 143 (gpr143) was identified as a candidate gene for disease resistance in giant groupers.

AQUACULTURE (2024)

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Article Fisheries

Towards better lumpfish: Changes in size variation, cataract development, behaviour and sea lice grazing through selective breeding

Albert Kjartan Dagbjartarson Imsland, Patrick Reynolds, Lauri Kapari, Simo Njabulo Maduna, Snorre B. Hagen, Anna Hanssen, Olof Dora Bartels Jonsdottir

Summary: The aim of this study was to evaluate the potential improvement in sea lice grazing efficiency, behavior, size variation, and cataract development through selective breeding of lumpfish. The results showed that selective breeding programs can enhance sea lice grazing, size variation, cataract prevalence, and behavior types in both L. salmonis and C. elongatus.

AQUACULTURE (2024)

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Article Fisheries

Economic analysis of the contributions of aquaculture to future food security

Trond Bjorndal, Madan Dey, Amalie Tusvik

Summary: This paper takes an economic approach to analyze the supply of and demand for fish up to 2030, with a focus on aquaculture. The study finds that variations in aquaculture growth rates have important consequences for future fish prices and per capita fish consumption. Sub-Saharan Africa is particularly affected by the growth rate of aquaculture production.

AQUACULTURE (2024)

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Article Fisheries

Effect of human chorionic gonadotrophin (HCG) and luteinizing hormone releasing hormone A3 (LHRH-A3) on reproduction and development of brood pouch in Hippocampus erectus

Xuange Liu, Gongpei Wang, Jiahui Chen, Sheng Bi, Chenlei Huang, Han Lai, Huadong Yi, Haiyang Li, Qiuxian Chen, Li Lin, Zhilun Zhang, Xuchong Wei, Yong Zhang, Guifeng Li

Summary: Syngnathid fishes have a unique reproductive system, and injecting a mixture of HCG and LHRH-A3 into the brood pouch can accelerate reproductive interactions, promote physiological changes, and up-regulate gene expression.

AQUACULTURE (2024)

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Article Fisheries

Peracetic acid mode-of-action on aquaculture microbes evaluated by dual-staining flow cytometry

Sanni L. Aalto, Lone Madsen, Lars-Flemming Pedersen

Summary: Dual-staining flow cytometry allows accurate quantification of live and dead cells, making it a potential tool for studying the mode-of-action of disinfection chemicals and supporting microbial control in aquaculture systems.

AQUACULTURE (2024)

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Article Fisheries

State of the heart: Anatomical annotation and assessment of morphological cardiac variation in Atlantic salmon (Salmo salar L.)

Vilde Arntzen Engdal, Alf Seljenes Dalum, Harald Kryvi, Michael Frisk, Hakon Torsvik, Kjetil Hodne, Harriet Romstad, Ida Beitnes Johansen

Summary: Farmed Atlantic salmon suffer from cardiac morphology abnormalities, which pose a threat to their health and robustness. However, studying the cause and consequences of these abnormalities is challenging due to the lack of standardized nomenclature, methods, and scoring systems. In this study, a nomenclature for the pyramidal teleost heart is developed, along with quantitative and qualitative methods to assess heart morphology. The qualitative method is found to be more effective in detecting abnormalities in deceased fish, highlighting its complementary nature to the quantitative method.

AQUACULTURE (2024)

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Article Fisheries

Essential oils of Ocimum gratissimum, Lippia grata and Lippia origanoides are effective in the control of the acanthocephalan Neoechinorhynchus buttnerae in Colossoma macropomum

Maria Ines Braga Oliveira, Franmir Rodrigues Brandao, Marcos Tavares-Dias, Bruna Carlos Nascimento Barbosa, Maria Juliete Souza Rocha, Lorena Vieira Matos, Damy Caroline Melo Souza, Claudia Majolo, Marcelo Roseo Oliveira, Francisco Celio Maia Chaves, Edsandra Campos Chagas

Summary: This study investigated the efficacy of essential oils in controlling acanthocephalosis in tambaqui fish. The results showed that the essential oils of Lippia grata, Lippia origanoides, and Ocimum gratissimum were effective in reducing the parasitism rates in fish and improving their growth and health indices.

AQUACULTURE (2024)

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Article Fisheries

Genetic divergence of farmed blue mussels (Mytilus sp.) in Australian waters

Georgina Bramwell, Aaron G. Schultz, Thomas Madsen, Frederic Thomas, Nick Macdonald, Antoine M. Dujon, Craig D. H. Sherman, Beata Ujvari

Summary: This study investigated the phylogenetic relationship and genetic variation of farmed blue mussels along the south coast of Australia. The results showed genetic differences between different locations and genes, which could be valuable for the aquaculture industry.

AQUACULTURE (2024)

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Article Fisheries

Sandfish generations: Loss of genetic diversity due to hatchery practices in the sea cucumber Holothuria (Metriatyla) scabra

Kelly T. Brown, Paul C. Southgate, Epeli M. Loganimoce, Teari Kaure, Brian Stockwell, Monal M. Lal

Summary: Hatcheries are crucial for seed production in commercial aquaculture species, but they can lead to loss of genetic diversity among progeny. By analyzing genome-wide SNPs, this study evaluated the genetic impacts of hatchery production on sandfish, a high-value sea cucumber. The results showed skewed parental contributions, low effective population sizes among offspring cohorts, and a need for optimizing hatchery protocols to ensure genetically diverse offspring.

AQUACULTURE (2024)

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Article Fisheries

Comparative transcriptome analysis of hybrid Jinhu grouper (Epinephelus fuscoguttatus ♀ x Epinephelus tukula ♂) and Epinephelus fuscoguttatus under temperature stress

Pengfei Duan, Yongsheng Tian, Zhentong Li, Shuai Chen, Linlin Li, Xinyi Wang, Linna Wang, Yang Liu, Jieming Zhai, Wensheng Li, Qingbin Wang, Wenhui Ma, Zunfang Pang

Summary: This study conducted comparative transcriptome analyses of the liver, muscle, and brain tissues of Jinhu grouper and tiger grouper at different temperatures, revealing the molecular mechanisms and differences in temperature adaptation between the two species. The results suggest that Jinhu grouper may have better temperature tolerance and show higher expression of heat shock protein genes in brain tissue.

AQUACULTURE (2024)

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Article Fisheries

Market integration and market leadership: Evidence for cyprinoid markets in China

Zhenhao Yang, Markus Leibrecht, Junbo Zhang, Chenxing Yang

Summary: This study investigates the degree of market integration in the Chinese cyprinoid industry and finds that the markets are only partially integrated, with some species showing price transmission at specific stages. These findings are valuable for Chinese policy makers in regulating the industry.

AQUACULTURE (2024)

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