Fisheries

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Article Fisheries

Lcalmnb2: Asian seabass gene involved in resisting SGIV

Yepin Yu, Zituo Yang, Le Wang, Fei Sun, May Lee, Gen Hua Yue

Summary: This study characterized the lmnb2 gene from L. calcarifer and identified a SNP associated with SGIV resistance. The gene was found to be involved in cell proliferation, migration, and the replication of SGIV in Asian seabass cells. The findings shed light on the function of Lcalmnb2 in resisting SGIV infection and suggest the potential use of the identified SNP as a DNA marker in breeding programs.

AQUACULTURE (2024)

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Article Fisheries

Earthen pond-based floating beds for rice-fish co-culture as a novel concept for climate adaptation, water efficiency improvement, nitrogen and phosphorus management

Ashraf M. A. -S. Goda, Ahmed M. Aboseif, Eman Y. Mohammedy, Mostafa K. S. Taha, Ahmed I. A. Mansour, Enas A. Ramadan, Nevine M. Aboushabana, Marwa M. Zaher, Nora Ibanes Otazus, Mohamed Ashour

Summary: The current study evaluates a unique rice/fish-polyculture model established in Egypt and investigates its effectiveness in improving water, nitrogen, and phosphorus use efficiency. The study finds that this model can positively impact biomass production, nutrient utilization, and climate impact.

AQUACULTURE (2024)

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Article Fisheries

Genomic selection for hypoxia tolerance in large yellow croaker

Jie Ding, Yibo Zhang, Xujie Li, Jiaying Wang, Xinming Gao, Qiumeng Xiang, Zhenyu Gao, Tianyi Lan, Songpeng Jia, Mengqi Lu, Ran Meng, Xuelei Wang, Xiongfei Wu, Junquan Zhu, Weiliang Shen

Summary: This study aimed to improve the hypoxia tolerance of farmed Larimichthys crocea using genomic selection. By genotyping a large number of samples using a SNP array, it was found that GBLUP was the best genomic selection model. The results confirmed that genomic selection can effectively enhance the hypoxia tolerance in L. crocea.

AQUACULTURE (2024)

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Article Fisheries

Vibrio parahaemolyticus: Predicting effects of storage temperature on growth in Crassostrea gigas harvested in New Zealand

Graham C. Fletcher, Cristina D. Cruz, Duncan I. Hedderley

Summary: The frequency of gastroenteritis outbreaks caused by Vibrio parahaemolyticus has been increasing worldwide, including in New Zealand. Inadequate post-harvest refrigeration may allow the organism to grow to hazardous concentrations. Experimental and modeling studies show that the growth rates of V. parahaemolyticus are best described by log-linear and square root models, suggesting a slower growth rate in New Zealand oysters but the ability to grow at lower temperatures. The recommended minimum storage temperature of 7 degrees Celsius is adequate according to both models.

AQUACULTURE (2024)

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Article Fisheries

Quantitative real-time PCR reveals viral interference between white spot syndrome virus (WSSV) and infectious myonecrosis virus (IMNV) in Penaeus vannamei

Juliana Oliveira de Freitas, Jhonatas Teixeira Viana, Rafael dos Santos Rocha, Rodrigo Maggioni

Summary: This study investigates viral interference in healthy shrimp co-infected with IMNV and WSSV. It finds that WSSV exposure reduces the viral load of IMNV in shrimp, which then returns to baseline levels after 13 days. This suggests a competition for cellular receptors between the two viruses.

AQUACULTURE (2024)

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Article Fisheries

Effects of substrate, water flow, and turbulence in raceway culture of the high-value agarophyte Pterocladiella capillacea

Tomoki Mishina, Benjamin Mos, Symon A. Dworjanyn

Summary: One reason why commercial seaweed aquaculture is done extensively is because land-based intensive culture is expensive. This study found that seaweed growth can be enhanced by high water flows and turbulence, which are more prevalent in ocean-based aquaculture systems. The research suggests that spores of Pterocladiella capillacea are suitable for raceway culture, but adults do not thrive as well in similar conditions.

AQUACULTURE (2024)

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Article Fisheries

Protection of Pacific white shrimp (Penaeus vannamei) against white spot syndrome virus infection by nitric oxide-generating compound S-nitrosoglutathione

Qingna Lai, Chen Yu, Furong Zhao, Yunying Cheng, Qin Zheng, Changkun Pan, Zhenyue Lin, Suping Yang, Qian Zhang, Jianming Chen, Wei Wang

Summary: Nitric oxide plays a crucial role in immune defense against WSSV infection in shrimp, inhibiting viral replication and reducing mortality. This study provides theoretical support for the development of NO-based therapeutic strategies.

AQUACULTURE (2024)

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Article Fisheries

Characteristics of a gill resection - Regeneration model in freshwater laboratory-reared Atlantic salmon (Salmo salar)

E. Ghanizadeh-Kazerouni, J. M. Wilson, S. R. M. Jones, C. J. Brauner

Summary: This study investigated the regenerative capability of gill tissue in Atlantic salmon. The results showed that approximately 38% of the resected gill filament length regenerated after 20 weeks. The regeneration percentage varied significantly among individuals but was not correlated with initial body size, condition factor, or overall fish growth rate. Immunohistochemistry showed increased cell proliferation at the filament tip shortly after resection, followed by the appearance of ionocytes, chemoreceptive neuroepithelial cells, and nerve fibers.

AQUACULTURE (2024)

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Article Fisheries

Effects of stocking density and water flow rate on performance, water quality and economic benefits of African catfish larvae (Clarias gariepinus Burchell, 1822) in the aquaponic system integrated with Azolla fern

James Mugo-Bundi, Julius O. Manyala, Mucai Muchiri, Geraldine Matolla

Summary: This study investigated the effect of stocking density and water flow rate on the growth performance of African catfish larvae and Azolla in a catfish-Azolla aquaponics system. The results showed that stocking density and water flow rate had significant effects on dissolved oxygen, total ammonia nitrogen, and nitrate concentration. The final mean weight, specific growth rate, and survival of the catfish larvae were also influenced by the interaction of stocking density and water flow rate. Enterprise budgets and cash flow projections demonstrated the profitability and viability of fish and Azolla production under certain stocking densities and water flow rates.

AQUACULTURE (2024)

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Article Fisheries

Modified glucose addition with microalgae can create a healthy and stable rearing microenvironment for Pacific white shrimp (Litopenaeus vannamei)

Yikai Shi, Jiangdong Ke, Jie Xiang, Chen Lian, Jinyong Zhu, Zhongming Zheng, Kexin Zhang, Wen Yang

Summary: The combined addition of glucose and microalgae significantly improves shrimp survival rate and immune responses, and alters the bacterial community structure. Network topology analysis shows that the combined addition enhances the stability of bacterial community. The bacterial community structure indirectly affects shrimp survival rate. The results reveal the important role of combined addition of glucose and microalgae in maintaining shrimp health.

AQUACULTURE (2024)

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Article Fisheries

Genetic parameters and genomic prediction for nutritional quality-related traits of Pacific abalone (Haliotis discus hannai)

Junyu Liu, Ziheng Yin, Muzhi Zhou, Wenchao Yu, Weiwei You, Yexin Chen, Xuan Luo, Caihuan Ke

Summary: In this study, near infrared reflectance spectroscopy (NIRS) models were developed to estimate the collagen content and taurine content in Pacific abalone, and the prediction ability of four genomic selection models was assessed for the nutritional traits. The results showed potential for genomic selection in breeding programs for nutritional quality-related traits in Pacific abalone.

AQUACULTURE (2024)

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Article Fisheries

Aeromonas hydrophila causes ferroptotic damage via its secreted effectors targeting splenic macrophages in teleost

Hao Sun, Xiaoyu Ma, Qingqing Liu, Hengyi Hu, Xinyan Wang, Anying Zhang, Kun Yang, Mu Yang, Hong Zhou

Summary: This study reveals that Aeromonas hydrophila triggers ferroptosis in fish, leading to decreased survival, ferrugination, and lipid peroxidation damage, through the secretion of effectors that specifically target splenic macrophages. The bacterial effectors degrade ferritin and ferroportin1, causing intracellular iron accumulation, and decrease glutathione levels by promoting ROS generation. Inhibitors of ferroptosis improve fish survival, reduce oxidative damage, and bacterial load in the spleen. These findings highlight the importance of ferroptosis as a potential target for combating A. hydrophila infection in fish.

AQUACULTURE (2024)

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Article Fisheries

Brain-derived neurotrophic factor (BDNF) activates PI3K-AKT-mTOR signaling via hypothalamic TrkB receptors to reduce feeding in Siberian sturgeon (Acipenser baerii)

Shupeng Zhang, Yongpei Lu, Yingzi Li, Yanling Liu, Qin Yao, Qin Kang, Shuhuang Chen, Youlian Liu, Yixiao Xiong, Defang Chen, Xin Zhang, Ni Tang, Zhiqiong Li

Summary: This study confirms the anorexigenic effect of brain-derived neurotrophic factor (BDNF) in Siberian sturgeon. Injection of BDNF suppresses feeding and affects the expression of peptide genes.

AQUACULTURE (2024)

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Article Fisheries

Replacing fishmeal with cottonseed protein concentrate in practical diet of largemouth bass (Micropterus salmoides): Growth, flesh quality and metabolomics

Xiaoying Xu, Xiaoqin Li, Zhen Xu, Hang Yang, Xia Lin, Xiangjun Leng

Summary: The study shows that substituting fishmeal with cottonseed protein concentrate (CPC) in practical diets has no significant impact on the growth and flesh quality of largemouth bass. However, high replacement of fishmeal may decrease the growth performance and flesh quality of largemouth bass.

AQUACULTURE (2024)

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Article Fisheries

The effects of sodium propionate on intestinal barrier function of genetically improved farmed tilapia in a high-lipid formulation

Qianwen Ding, Qiang Hao, Ya Jin, Qingshuang Zhang, Yadong Xie, Yalin Yang, Rolf Erik Olsen, Einar Ringo, Chao Ran, Zhen Zhang, Zhigang Zhou

Summary: This study found that sodium propionate supplementation in a high-fat diet can negatively impact intestinal epithelium integrity and permeability in fish, as well as alter the composition of the gut microbial community.

AQUACULTURE (2024)

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Article Fisheries

The decline in sea lice numbers during freshwater treatments in salmon aquaculture

Maria Guttu, Maria Gaaso, Anna S. Batnes, Yngvar Olsen

Summary: The use of freshwater as a method to remove sea lice from farmed Atlantic salmon shows high efficiency. In a field study, it was observed that there was a rapid decrease in sea lice numbers during the initial phase of freshwater treatment, and a further reduction during unloading.

AQUACULTURE (2024)

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Article Fisheries

A potential feeding regulation strategy during aestivation: Relaxation of intestine mediated by pedal peptide/orcokinin-type neuropeptides in sea cucumber Apostichopus japonicus

Yingqiu Zheng, Huachen Liu, Xiao Cong, Kenneth B. Storey, Muyan Chen

Summary: This study investigated the role of PP/OK-type neuropeptides in the aestivation process of Apostichopus japonicus, suggesting their key involvement in the relaxation of the intestine, inhibition of feeding, and potential regulatory strategy for counteracting intestine atrophy and body mass reduction in sea cucumber aquaculture.

AQUACULTURE (2024)

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Article Fisheries

Evaluation of regulatory capacity of three lactic acid bacteria on the growth performance, non-specific immunity, and intestinal microbiota of the sea cucumber Apostichopus japonicus

Longzhen Liu, Yang Liu, Guangcai Qin, Cong Wei, Yongmei Li, Liang Cui, Xiangli Tian

Summary: The probiotic effects of lactic acid bacteria (LAB) on sea cucumber were investigated. The study found that LAB significantly improved the growth performance and immune responses of sea cucumber, with L. plantarum W2 showing the best effect.

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Article Fisheries

Histamine H2 receptor agonist dimaprit dihydrochloride stimulates the hypothalamo-hypophysial-testicular axis in the cichlid fish Oreochromis mossambicus

Ashwini Biradar, C. B. Ganesh

Summary: Histamine, a naturally occurring substance in vertebrates, plays a crucial role in regulating immune function and reproduction. This study found that the histamine H2 receptor agonist dimaprit dihydrochloride (DIMP) has a stimulatory effect on the hypothalamo-hypophysial-testis (HPT) axis in Mozambique tilapia, increasing the number of germ cells and influencing hormone levels.

AQUACULTURE (2024)

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Article Fisheries

Time from feeding impacts farmed Atlantic salmon (Salmo salar) gut microbiota and faecal score

Chantelle E. Reid, Andrew Bissett, Christine Huynh, John P. Bowman, Richard S. Taylor

Summary: In intensive Atlantic salmon aquaculture, faecal score can serve as an indicator of gut microbiome diversity and composition, and can be used to detect dysbiosis. However, the utility of faecal scoring for assessing commercially farmed fish populations may be affected by rapid changes in digestive status following feeding.

AQUACULTURE (2024)

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