Article
Agriculture, Dairy & Animal Science
Tjasa Kodela, Dusan Jesensek, Simona Susnik Bajec
Summary: European grayling is an endangered salmonid fish species with decreasing populations in European waters. This study analyzed the reproductive parameters of grayling females in a hatchery, including fecundity, egg size, and embryo survival. The results showed significant differences between first time spawners and repeat spawners, with repeat spawners producing more eggs. Absolute fecundity was correlated with the total length and weight of grayling females, while relative fecundity was not. Heavier eggs had a higher rate of survival, particularly for first time spawners. This suggests that larger and older grayling females should be prioritized for hatchery reproduction.
ANIMAL REPRODUCTION SCIENCE
(2023)
Article
Fisheries
Samuel M. Pountney, Ingrid Lein, Sarah-Louise Counter Selly, Herve Migaud, Andrew Davie
Summary: This study assessed the hatching success and nutritional composition of lumpfish eggs and found lower egg quality in captive broodstock. Compared to wild broodstock, eggs from farmed broodstock had lower fertilization rates, eyeing rates, and survival to hatching, as well as lower lipid content, mineral levels, and overall egg pigment levels.
Article
Agriculture, Dairy & Animal Science
Renzo Pepe-Victoriano, Hector Aravena-Ambrosetti, German E. Merino
Summary: Understanding the biology of fish is crucial for advancing the culture of marine fish species. This study successfully captured, transported, and conditioned a population of bonito, obtaining eggs, larvae, and juveniles for aquaculture research. The findings highlight the importance of establishing an initial broodstock population for the cultivation of marine species.
Article
Fisheries
Raquel Quiros-Pozo, Lidia Robaina, Juan Antonio Calderon, Javier Roo Filgueira
Summary: The golden grey mullet (Liza aurata) has potential for sustainable aquaculture expansion, but the lack of sustainable juvenile provision is a major bottleneck. This study aimed to describe the reproductive management of Liza aurata broodstock and explore the reproductive lipid metabolism of the species. The results showed successful natural spawning under controlled conditions and highlighted the importance of highly unsaturated fatty acids for gonadal development. These findings can contribute to improving broodstock management and feed formulation for sustainable aquaculture growth.
Article
Biochemistry & Molecular Biology
Weiguang Zou, Jiawei Hong, Wenchao Yu, Yaobin Ma, Jiacheng Gan, Yanbo Liu, Xuan Luo, Weiwei You, Caihuan Ke
Summary: Dietary antioxidant supplementation, particularly astaxanthin, has been found to have significant effects on reproductive aspects, egg quality, growth, survival, immunity, stress tolerance, and disease resistance in aquatic animals. However, the effects of astaxanthin supplementation from different sources remain unknown. This study compared the performance of different astaxanthin sources on various aspects in abalone and found that astaxanthin supplementation from Phaffia rhodozyma at a concentration of 80 mg/kg yielded the most favorable outcomes, thus contributing to improved efficiency and economic benefits in abalone production.
Article
Chemistry, Applied
Hao Wang, Weizhao He, Dieudonne Mahukpego Dansou, Huiyan Zhang, Ramdhan Dwi Nugroho, Chaohua Tang, Xiaoqing Guo, Yanan Yu, Qingyu Zhao, Yuchang Qin, Junmin Zhang
Summary: This study found that astaxanthin can improve the stability of DHA-enriched egg products during storage, primarily by suppressing the oxidation of DHA-non-esterified fatty acids and minimizing the degradation of DHA.
Article
Fisheries
Shajahan Ferosekhan, Abhay Kumar Giri, Sangram Ketan Sahoo, Kalidoss Radhakrishnan, Bindu Raman Pillai, Shiba Shankar Giri, Saroj Kumar Swain
Summary: The Asian catfish, Clarias magur, is an endangered fish species highly valued for commercial purposes in India and other South-East Asian countries. A study on induced spawning showed that medium-sized female broodstock of 130-180g had significant effects on reproductive performance, egg, and larval quality.
AQUACULTURE RESEARCH
(2021)
Article
Fisheries
Pallath Muhammed Nuzaiba, Tamilarasan Nirmal, Prabhakaran Arya, Tincy Varghese, Subodh Gupta, Narottam Prasad Sahu, Prem Prakash Srivastava
Summary: A feeding trial was conducted to evaluate the endocrine disrupting effect of phytoestrogens in carp and to determine the optimum inclusion level of soybean meal in the diet of broodstock. The results showed that the hormone levels and reproductive function of female carp improved with 15% to 25% inclusion of soybean meal, but were negatively affected with inclusion levels above 30%.
Review
Agriculture, Dairy & Animal Science
Hanyi Shi, Xuejuan Deng, Xiaoyu Ji, Ning Liu, Huiyi Cai
Summary: Astaxanthin (Ax) and lutein are important fat-soluble pigments and essential nutrients for human and animal health. This review focuses on the commercial production of Ax and lutein, their effects on yolk color and nutritional functionality, and their enhancement of immune function. The potential roles of carotenoids in the cytokine storm and gut microbiota are also briefly presented, along with suggestions for future research.
Article
Multidisciplinary Sciences
Hanafiah Fazhan, Khor Waiho, Alexander Chong Shu-Chien, Youji Wang, Mhd Ikhwanuddin, Muyassar H. Abualreesh, Nor Azman Kasan, Qingyang Wu, Sabri Muda, Chin Siang Sor, Mohamad Jalilah
Summary: Mud crabs (genus Scylla) are receiving attention as potential aquaculture species due to their high market price and demand. This study investigated the association between different sand substrates and the reproductive output of female Scylla species during broodstock conditioning. The results suggest that fine sand should be incorporated into Scylla broodstock rearing to maximize female reproductive output, as it has a positive effect on egg extrusion and influences the weight of egg clutch, total egg number, fecundity, and clutch size.
Article
Agriculture, Dairy & Animal Science
Nuo Heng, Shan Gao, Yu Chen, Liang Wang, Zheng Li, Yong Guo, Xihui Sheng, Xiangguo Wang, Kai Xing, Longfei Xiao, Hemin Ni, Xiaolong Qi
Summary: The study found that dietary ASTA can improve the antioxidant enzyme activity and free radical scavenging ability in laying hens, potentially due to the upregulation of mRNA expression of genes encoding antioxidant enzymes and NRF2.
Article
Environmental Sciences
M. Fernandez-Miguez, V. Puvanendran, E. Burgerhout, P. Presa, H. Tveiten, K. Vorkamp, O. J. Hansen, G. S. Johansson, A. S. Bogevik
Summary: This study evaluated the effects of feed containing naturally weathered microplastics from the Oslofjord on the reproductive physiology of Atlantic cod. The results showed that microplastics had some effects on the sex hormone levels and enzyme production and function of the fish, but there were no major differences in overall biometrics or gonad histology. These findings suggest that the long-term consequences of microplastics on the ecosystem should be considered.
ENVIRONMENTAL POLLUTION
(2023)
Article
Food Science & Technology
Lu Yang, Xing Qiao, Haidong Nan, Yunrui Cao, Jie Xu, Changhu Xue
Summary: The optimized one-step synthesis method significantly enhances the water solubility and bioavailability of astaxanthin with the formation of mPC-Asta. The experiments show that mPC-Asta nanomicelles have good stability under specific storage conditions.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Agriculture, Multidisciplinary
Xiaoxu Wang, Peixu Cong, Xincen Wang, Zhigao Wang, Bin Liu, Changhu Xue, Jie Xu
Summary: In this study, AST-DHA supplementation was shown to reduce body weight gain, enhance autophagy, and restore autophagic function in the hypothalamus of mice fed a high-fat diet. This was achieved through the regulation of mTOR and AMPK pathways, promoting autophagy and cleavage of pro-opiomelanocortin. These findings suggest that AST-DHA may be a potential therapeutic agent for the treatment of HFD-induced obesity.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Fisheries
Takeshi Yamamoto, Hiroyuki Matsunari, Koji Murashita, Hazuki Yoshinaga, Hiromi Oku, Hirofumi Furuita, Nana Kaji, Toshihiro Aoyagi, Masayuki Miura
Summary: This study explored the effects of nutritional history during the maturation of rainbow trout on the utilization of a plant-based grower diet in the offspring. The results showed that broodstock fed a plant-based diet delayed ovulation, but had no significant effect on egg quality. However, the offspring fed a plant-based grower diet showed significantly higher growth rates and feed intake compared to those fed a fishmeal-based diet. These findings suggest that the nutritional history of broodstock can influence the appetite and digestive physiology of the offspring, but has minimal impact on their growth.
Article
Biology
Flemming Dahlke, Magnus Lucassen, Ulf Bickmeyer, Sylke Wohlrab, Velmurugu Puvanendran, Atle Mortensen, Melissa Chierici, Hans-Otto Poertner, Daniela Storch
JOURNAL OF EXPERIMENTAL BIOLOGY
(2020)
Article
Biology
Atle Mortensen, Richard B. Johansen, Oyvind J. Hansen, Velmurugu Puvanendran
JOURNAL OF THERMAL BIOLOGY
(2020)
Article
Multidisciplinary Sciences
Silvia Martinez-Llorens, Stefano Peruzzi, Inger-Britt Falk-Petersen, Sergio Godoy-Olmos, Lars Olav Ulleberg, Ana Tomas-Vidal, Velmurugu Puvanendran, Derrick Kwame Odei, Orjan Hagen, Jorge M. O. Fernandes, Malcolm Jobling
Summary: Triploid, sterile Atlantic salmon could contribute to the farming industry, but uncertainties about their performance and welfare have limited their adoption by farmers. This study compared the digestive tract morphology and enzyme activities of diploid and triploid Atlantic salmon, finding that triploid salmon had lower digestibility of amino acids and no significant differences in proteolytic enzyme activities compared to diploids. The study also suggested that trypsin-to-chymotrypsin activity ratios could potentially predict recent growth history and growth potential in salmon.
Article
Fisheries
V. Puvanendran, I. Rud, M. S. W. Breiland, J. A. Arnesen, L. Axelsson
Summary: The study demonstrated that feeding Atlantic cod larvae with two Carnobacterium divergens strains significantly improved growth, survival, and disease resistance. The enrichment of carnobacteria in the feed did not significantly impact the overall microbiota diversity or composition. Despite this, the probiotic treatment positively affected the performance and welfare of cod larvae.
Article
Environmental Sciences
Sissel Norland, Katrin Vorkamp, Andre S. Bogevik, Albert A. Koelmans, Noel J. Diepens, Erik Burgerhout, Oyvind J. Hansen, Velmurugu Puvanendran, Ivar Ronnestad
Summary: The study used a tube-feeding model to administer microplastic spheres to fish larvae and found that there was no significant transfer of PCB-153 from contaminated microplastic into fish larvae within a gut-transit time of less than 24 hours. This suggests that the role of microplastics in the uptake and absorption of hydrophobic organic contaminants may be minor compared to other pathways.
Review
Fisheries
Velmurugu Puvanendran, Atle Mortensen, Lill-Heidi Johansen, Anne Kettunen, Oyvind J. Hansen, Edgar Henriksen, Morten Heide
Summary: Historically abundant Atlantic cod has seen declining stocks, leading to attempts at commercial farming with mixed results due to gaps in biological knowledge and economic factors. The Norwegian National Cod Breeding Program has shown promise in domesticating cod and improving juvenile quality. Ongoing efforts focus on addressing past failures and enhancing growth and disease resistance through selective breeding.
REVIEWS IN AQUACULTURE
(2022)
Article
Fisheries
Flemming Dahlke, Velmurugu Puvanendran, Atle Mortensen, Hans-Otto Poertner, Daniela Storch
Summary: The impacts of global warming and ocean acidification on fish reproduction, specifically Atlantic cod, were investigated. The study found that both warming and the combination of warming and acidification resulted in reduced gamete quality and fertilization success in farmed cod. These findings suggest potential loss of spawning habitat in the future.
JOURNAL OF FISH BIOLOGY
(2022)
Article
Fisheries
Velmurugu Puvanendran, Trilochan Swain, Helge Tveiten, Oyvind J. Hansen, Atle Mortensen
Summary: Larval cod require live prey for growth and survival, and prey concentration and feeding frequency are important factors. Water exchange rates and current also influence prey resident time and larval behavior. High water current induces stress and cortisol levels, while an intermediate rearing protocol leads to better growth and survival.
AQUACULTURE INTERNATIONAL
(2023)
Article
Environmental Sciences
M. Fernandez-Miguez, V. Puvanendran, E. Burgerhout, P. Presa, H. Tveiten, K. Vorkamp, O. J. Hansen, G. S. Johansson, A. S. Bogevik
Summary: This study evaluated the effects of feed containing naturally weathered microplastics from the Oslofjord on the reproductive physiology of Atlantic cod. The results showed that microplastics had some effects on the sex hormone levels and enzyme production and function of the fish, but there were no major differences in overall biometrics or gonad histology. These findings suggest that the long-term consequences of microplastics on the ecosystem should be considered.
ENVIRONMENTAL POLLUTION
(2023)
Article
Biochemistry & Molecular Biology
Andre S. Bogevik, Velmurugu Puvanendran, Katrin Vorkamp, Erik Burgerhout, Oyvind Hansen, Maria Fernandez-Miguez, Aleksei Krasnov, Sergey Afanasyev, Vibeke Host, Elisabeth Ytteborg
Summary: Microplastics are widely present in marine ecosystems and can transfer persistent organic pollutants (POPs) through the food web. In this study, rotifers were fed polyethylene microplastics spiked with PCBs and PBDEs, and then fed to cod larvae. The larvae showed higher concentrations of PCBs and PBDEs compared to the control group, but the difference became insignificant after a certain period. The skin of microplastic-exposed juveniles showed disrupted epithelial integrity and downregulation of genes involved in immunity and metabolism. The study suggests that microplastics may have long-term effects on fish's skin barrier defense system, immune response, and overall fitness.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Fisheries
Naislan F. A. Oliveira, Lucas S. Torati, Luciana A. Borin-Carvalho, Leandro K. F. de Lima, Velmurugu Puvanendran, Thais H. Demiciano, Jose J. T. da Silva, Aurisan da S. Barroso, Eduardo S. Varela
Summary: The high-resolution X-ray imaging method is effective for analyzing the quantity of intermuscular bones in tambaqui fish, providing accurate phenotypic data.
Article
Fisheries
Velmurugu Puvanendran, Oyvind J. Hansen
Summary: Studies have shown the negative short-term effects of early weaning on finfish larvae, but the information on its long-term effects on growth and economic loss is lacking. This study evaluated the short- and long-term effects of early weaning and late weaning on Atlantic cod, and found that late weaned fish showed significantly higher body weight at 30 months post-hatch compared to early weaned fish. A cost analysis indicated substantial financial benefit for commercial cod farming by using late weaning. Thus, it is recommended to use late weaning in order to gain considerable economic profit.
Article
Biochemistry & Molecular Biology
Velmurugu Puvanendran, Erik Burgerhout, Oivind Andersen, Matthew Kent, Oyvind Hansen, Torstein Tengs
Summary: We used material from Norway's National Cod Breeding Program to study the effects of different early life-stage temperature regimes on DNA methylation and gene expression. Long-term effects were observed in both fish sampled weeks after the end of differential treatments and offspring from different exposure groups. The study revealed overlapping genes and genes associated with differential CpG methylation levels, including those involved in muscle fibre development, metabolic processes, formation of deformities, and intergenerational transfer of epigenetic marks. The study suggests that utilizing environmental cues can enhance the production of Atlantic cod.
Article
Environmental Sciences
Leah C. C. Strople, Ireen Vieweg, Fekadu Yadetie, Derrick Kwame Odei, Anders Thorsen, Odd Andre Karlsen, Anders Goksoyr, Lisbet Sorensen, Antonio Sarno, Bjorn Henrik Hansen, Marianne Frantzen, Oyvind J. Hansen, Velmurugu Puvanendran, Jasmine Nahrgang
Summary: Scientists studied the impact of crude oil exposure on adult polar cod and their gametes during the spawning period. The results showed that crude oil exposure affected the spawning behavior and gamete quality of polar cod, while food limitation had a minor effect. This study reveals the importance of the spawning period in polar cod's sensitivity to crude oil exposure and highlights the need for further research.
JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH-PART A-CURRENT ISSUES
(2023)
Article
Physiology
Frank Thomas Mlingi, Velmurugu Puvanendran, Erik Burgerhout, Helge Tveiten, Jonna Tomkiewicz, Elin Kjorsvik, Maren Mommens
Summary: Ultrasound proves to be a useful and reliable non-invasive method for monitoring gonadal development in lumpfish. The ultrasound stages align with histological gonadal stages and exhibit significant positive correlations with parameters such as GSI and hormone levels, reflecting their parallel trends during gonadal development.
PHYSIOLOGICAL REPORTS
(2023)