Article
Fisheries
J. A. Rodrigues-Filho, B. C. Araujo, P. H. Mello, C. E. O. Garcia, V. F. D. Silva, W. Li, B. Levavi-Sivan, R. G. Moreira
Summary: The reproductive activity of captive dusky groupers was evaluated using non-lethal tools. The plasma profile of gonadal steroids and follicle-stimulating hormone (FSH) was measured, and the effects of human Chorionic Gonadotropin (hCG) and 17 beta-estradiol (E2) implants on vitellogenesis were investigated. Results showed that captivity had a negative impact on vitellogenesis in E. marginatus.
Article
Environmental Sciences
Andre S. Bogevik, Elisabeth Ytteborg, Alexander Klevedal Madsen, Ann-Elise Olderbakk Jordal, Odd Andre Karlsen, Ivar Ronnestad
Summary: In this study, polyethylene (PE) microplastics were added to Atlantic cod feeds at 1%, either in their original form or spiked with PCB-126. After a 4-week period, cod fed spiked PE showed a higher concentration of PCB-126 in liver and muscle samples compared to control and fish ingesting virgin PE. The expression of hepatic cyp1a was higher in cod fed spiked PE, indicating an accumulation of PCB-126 in the liver. Moreover, both spiked PE and virgin PE had an effect on the skin, suggesting a reduced skin barrier in fish fed a diet containing PE.
MARINE POLLUTION BULLETIN
(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
Entomology
Sufang Deng, Junxiu Wang, Enbo Ma, Jianzhen Zhang, Shuping Xing
Summary: This study investigated the function of LmTDRD5 in Locusta migratoria. Knockdown of LmTdrd5 in males resulted in decreased sperm count and sperm length, as well as downregulation of germ cell marker genes. Knockdown of LmTdrd5 in females affected ovarian development and oocyte maturation. Therefore, LmTdrd5 plays an important role in locust reproduction.
Article
Agriculture, Dairy & Animal Science
Taynan Stonoga Kawamoto, Joao Henrique Moreira Viana, Thais Preisser Pontelo, Mauricio Machaim Franco, Otavio Augusto Costa de Faria, Andrei Antonioni Guedes Fidelis, Luna Nascimento Vargas, Ricardo Alamino Figueiredo
Summary: This study characterized the reproductive physiology, oocyte competence, and chromatin compaction in Nelore calves during the early-prepubertal and intermediate-prepubertal periods. The oocyte competence gradually improved during the prepubertal period, which can help determine whether to collect oocytes from calves.
Article
Entomology
Junxiu Wang, Tingting Li, Sufang Deng, Enbo Ma, Jianzhen Zhang, Shuping Xing
Summary: Insect reproduction is crucial for maintaining population abundance, with RNA helicase DEAD-box protein 6 (DDX6) identified as a key player in female locust reproduction, offering a new target for locust biological control.
Article
Psychiatry
Hiba Zaidan, Dalia Galiani, Inna Gaisler-Salomon
Summary: Pre-reproductive stress alters behavior and gene expression in offspring, with post-stress drug treatment reversing some effects. Changes in Crhr1 and Crhr1-targeting microRNA were observed in stressed female rats and their offspring, while paternal F2 offspring showed different effects compared to maternal F2 offspring.
TRANSLATIONAL PSYCHIATRY
(2021)
Review
Cell Biology
Kiyoshi Soyano, Takafumi Amagai, Tomofumi Yamaguchi, Yuji Mushirobira, Wen-Gang Xu, Nhan Thanh Pham, Ryosuke Murata
Summary: Groupers are important fish species widely found in tropical and subtropical areas, playing a significant role in coastal ecosystems and fisheries. Research is focused on understanding the reproductive and gonadal development mechanisms of groupers to facilitate their aquaculture, as well as studying the ecological mechanism of sex change and reproductive physiology, with a particular focus on the endocrine system. Recently, research on groupers has also aimed to understand the impact of ocean warming and man-made chemicals on coastal environments. However, knowledge about the physiology and ecology of these fish, especially their reproductive physiology, is limited, due to challenges associated with conducting breeding experiments using wild populations.
Article
Food Science & Technology
Chenyan Hu, Yachen Bai, Jing Li, Baili Sun, Lianguo Chen
Summary: Methylparaben (MeP), commonly used in daily products as a preservative, has become a concerning aquatic pollutant. This study exposed adult zebrafish to different concentrations of MeP to investigate its reproductive toxicity. The results showed that MeP exposure affected gonad development, disrupted hormone balance, and led to developmental deficits in offspring. This study provides insight into the antiestrogenic activity and reproductive toxicity of MeP.
FOOD AND CHEMICAL TOXICOLOGY
(2023)
Article
Environmental Sciences
Peter J. Wright, Alice Doyle, John B. Taggart, Andrew Davie
Summary: This study used a combination of genotypic screening and phenotypic traits to define the scale of population structuring in Atlantic cod, revealing finer scale structuring than previously reported, which persisted over a decade. Spatial variation in phenotypic traits reflected genetic variation, providing an explanation for differences in maturation schedules and temperature exposure. The study highlights the mismatch between stock divisions and population units, leading to misunderstandings about stock recovery.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Evolutionary Biology
Bjoerghild Breistein, Geir Dahle, Torild Johansen, Francois Besnier, Maria Quintela, Per Erik Jorde, Halvor Knutsen, Jon-Ivar Westgaard, Kjell Nedreaas, Eva Farestveit, Kevin Alan Glover
Summary: This study examines the population genetic structure of coastal Atlantic cod in Norway and finds that the genetically distinct migratory ecotype NEAC plays a major role in shaping the genetic connectivity among populations. Additionally, there is limited connectivity between different fjords.
EVOLUTIONARY APPLICATIONS
(2022)
Article
Fisheries
Valentin Thepot, Alexandra H. Campbell, Michael A. Rimmer, Martina Jelocnik, Colin Johnston, Brad Evans, Nicholas A. Paul
Summary: The addition of the red seaweed Asparagopsis taxiformis and its extract to Atlantic salmon feed significantly enhanced fish growth rates, feed intake, and innate immune responses. On the other hand, the inclusion of the immunostimulant lipopolysaccharide (LPS) derived from Escherichia coli led to an increased innate immune response but had no significant effect on growth or feed intake. The seaweed and LPS supplements also modulated the expression of immune and stress-related genes in the fish's liver and head kidneys, showing potential as functional feed ingredients for enhancing the immune response and growth rate of Atlantic salmon.
Article
Biochemistry & Molecular Biology
Tiantian Chen, Ruihan Xu, Na Sheng, Shunli Che, Lemei Zhu, Fan Liu, Shiping Su, Shuquan Ding, Xilei Li
Summary: The study identified and characterized a full-length cDNA encoding HMGR in Eriocheir sinensis, which plays a potential role in vitellogenin biosynthesis in female crabs. RNA interference experiments showed that silencing of EsHMGR led to decreased expression of vitellogenin, suggesting its involvement in reproduction in crustaceans.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY
(2022)
Article
Multidisciplinary Sciences
Bridie Jean Marie Allan, Jessica Louise Ray, Maik Tiedemann, Valeriya Komyakova, Frode Vikebo, Katrine Sandnes Skaar, Martina H. Stiasny, Arild Folkvord, Richard D. M. Nash, Erling Kare Stenevik, Olav Sigurd Kjesbu
Summary: Mortality rates in early life-history stages of fishes are high, with Atlantic herring recruitment decreasing in the Norwegian Sea due to increased predation pressure by Atlantic mackerel. Research using particle drift simulations and ddPCR analysis confirms mackerel predation on herring larvae, highlighting the importance of accurately quantifying predation pressure for effective conservation and management strategies.
SCIENTIFIC REPORTS
(2021)
Article
Fisheries
Jun Qiang, Yi-Fan Tao, Jun-Hao Zhu, Si-Qi Lu, Zhe-Ming Cao, Jun-Lei Ma, Jie He, Pao Xu
Summary: This study investigated the effects of heat stress on follicular development and atresia in female Nile tilapia. The results showed that heat stress led to increased follicular atresia, apoptosis, and autophagy in the ovary, as well as decreased serum hormone contents and gene transcript levels. Heat stress also affected fatty acid composition and dysregulated signaling pathways associated with apoptosis, autophagy, metabolism, and hormone regulation.
Article
Biochemistry & Molecular Biology
Diana Medina-Felix, Francisco Vargas-Albores, Estefania Garibay-Valdez, Luis Rafael Martinez-Cordova, Marcel Martinez-Porchas
Summary: In this research, the effects of Nocardia infection on fish gastrointestinal microbiota were analyzed. It was found that the infection led to decreased survival rate, severe damage to the stomach microbiota, and a significant increase in Proteobacteria. A negative correlation network between Proteobacteria and other important phyla was observed. Therefore, Nocardia sp. is an emerging pathogen capable of inducing dysbiosis and causing significant mortalities.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS
(2024)
Article
Biochemistry & Molecular Biology
Lele Wu, Wen Sun, Jiale Zhou, Yaolin Li, Jun Li, Zongcheng Song, Changbin Song, Shihong Xu, Xinlu Yue, Xian Li
Summary: The study finds that red light induces dichromatic skin pigmentation in turbot juveniles, with some individuals displaying black coloration and others displaying lighter skin. The upregulated gene expressions related to melanin synthesis and the involvement of the nervous system in spectral environment-driven color regulation are both crucial factors.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS
(2024)