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https://www.readbyqxmd.com/read/28636888/responsiveness-of-pituitary-to-galanin-throughout-the-reproductive-cycle-of-male-european-sea-bass-dicentrarchus-labrax
#1
P Pinto, Z Velez, C Sousa, S Santos, A Andrade, M V Alvarado, A Felip, S Zanuy, A V M Canário
The neuropeptide galanin (Gal) is a putative factor regulating puberty onset and reproduction through its actions on the pituitary. The present study investigated the pituitary responsiveness to galanin and the patterns of galanin receptors (Galrs) expression throughout the reproductive cycle of two years old male European sea bass (Dicentrarchus labrax), an important aquaculture species. Quantitative analysis of pituitary and hypothalamus transcript expression of four galr subtypes revealed differential regulation according to the testicular developmental stage, with an overall decrease in expression from the immature stage to the mid-recrudescence stage...
June 18, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28635581/first-report-on-the-successful-hybridization-of-pangasianodon-hypophthalmus-sauvage-1878-and-clarias-gariepinus-burchell-1822
#2
V T Okomoda, I C C Koh, M S Shahreza
Breeding and larval performance of novel hybrids from reciprocal crosses of Asian catfish Pangasianodon hypophthalmus (Sauvage, 1878) and African catfish Clarias gariepinus (Burchell, 1822) were investigated in this study. Spawning was by hormonal injection of brood fish, artificial fertilization, and incubation in triplicate aquarium tanks (0.5 × 0.5 × 0.5 m3) with continuous aeration. Reciprocal crosses (♀C. gariepinus × ♂P. hypophthalmus and ♀P. hypophthalmus × ♂C. gariepinus) had lower hatchability (≤50%) than their pure siblings (≥75%)...
June 21, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28634011/immunomodulatory-properties-of-concholepas-concholepas-hemocyanin-against-francisellosis-in-a-zebrafish-model
#3
Leidy Lagos, Julia I Tandberg, María Inés Becker, Hanne C Winther-Larsen
The development of vaccines for aquaculture has been an important milestone in providing a continuous and sustainable production. Most of the vaccines currently on the market for aquaculture include oil as adjuvant. Nevertheless, several studies reported an occurrence of side effects after their use in farmed fish. As a result, there is a need for new and improved adjuvants that can stimulate the immune system while causing as few side-effects as possible. Hemocyanins are versatile macromolecules with strong immunogenic and immunomodulatory properties...
June 17, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28633949/habitat-suitability-index-model-of-the-sea-cucumber-apostichopus-japonicus-selenka-a-case-study-of-shandong-peninsula-china
#4
Zhipeng Zhang, Jian Zhou, Jingjing Song, Qixiang Wang, Hongjun Liu, Xuexi Tang
A habitat suitability index (HSI) model for the sea cucumber Apostichopus japonicus (Selenka) was established in the present study. Based on geographic information systems, the HSI model was used to identify potential sites around the Shandong Peninsula suitable for restoration of immature (<25g) and mature (>25g) A. japonicus. Six habitat factors were used as input variables for the HSI model: sediment classification, water temperature, salinity, water depth, pH and dissolved oxygen. The weighting of each habitat factor was defined through the Delphi method...
June 17, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28633103/dietary-risk-ranking-for-residual-antibiotics-in-cultured-aquatic-products-around-tai-lake-china
#5
Chao Song, Le Li, Cong Zhang, Liping Qiu, Limin Fan, Wei Wu, Shunlong Meng, Gengdong Hu, Jiazhang Chen, Ying Liu, Aimin Mao
Antibiotics are widely used in aquaculture and therefore may be present as a dietary risk in cultured aquatic products. Using the Tai Lake Basin as a study area, we assessed the presence of 15 antibiotics in 5 widely cultured aquatic species using a newly developed dietary risk ranking approach. By assigning scores to each factor involved in the ranking matrices, the scores of dietary risks per antibiotic and per aquatic species were calculated. The results indicated that fluoroquinolone antibiotics posed the highest dietary risk in all aquatic species...
June 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28631597/colwellia-agarivorans-sp-nov-an-agar-digesting-marine-bacterium-isolated-from-coastal-seawater
#6
Zhen-Xing Xu, Heng-Xi Zhang, Ji-Ru Han, Christopher A Dunlap, Alejandro P Rooney, Da-Shuai Mu, Zong-Jun Du
A novel Gram-stain-negative, facultatively anaerobic, yellowish and agar-digesting marine bacterium, designated strain QM50T, was isolated from coastal seawater in an aquaculture site near Qingdao, China. Phylogenetic analysis based on 16S rRNA gene sequences revealed that the isolate represented a member of the genus Colwellia and exhibited the highest sequence similarity (97.4 %) to Colwellia aestuarii SMK-10T. Average nucleotide identity (ANI) values based on draft genome sequences between strain QM50T and C...
June 20, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28630014/impact-of-molecular-hydrogen-treatments-on-the-innate-immune-activity-and-survival-of-zebrafish-danio-rerio-challenged-with-aeromonas-hydrophila
#7
Zhenyu Hu, Bingqian Wu, Fanhong Meng, Zejian Zhou, Hui Lu, Heng Zhao
Recently, molecular hydrogen has been reported to have a suppressive effect on inflammation in human and rodent models. The aim of this study was to evaluate the preventive effects of hydrogen-rich water (HRW) on zebrafish challenged by A. hydrophila. We have found an increased survival rate of bacteria-challenged zebrafish subjected to the HRW immersion treatment. Furthermore, we have revealed that HRW was able to block multiplication of A. hydrophila in zebrafish. In addition, treatment of zebrafish infected by A...
June 16, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28629124/microbial-diseases-of-bivalve-mollusks-infections-immunology-and-antimicrobial-defense
#8
REVIEW
Carla Zannella, Francesco Mosca, Francesca Mariani, Gianluigi Franci, Veronica Folliero, Marilena Galdiero, Pietro Giorgio Tiscar, Massimiliano Galdiero
A variety of bivalve mollusks (phylum Mollusca, class Bivalvia) constitute a prominent commodity in fisheries and aquacultures, but are also crucial in order to preserve our ecosystem's complexity and function. Bivalve mollusks, such as clams, mussels, oysters and scallops, are relevant bred species, and their global farming maintains a high incremental annual growth rate, representing a considerable proportion of the overall fishery activities. Bivalve mollusks are filter feeders; therefore by filtering a great quantity of water, they may bioaccumulate in their tissues a high number of microorganisms that can be considered infectious for humans and higher vertebrates...
June 17, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28628817/dynamics-of-dissolved-nutrients-in-the-aquaculture-shrimp-ponds-of-the-min-river-estuary-china-concentrations-fluxes-and-environmental-loads
#9
Ping Yang, Derrick Y F Lai, Baoshi Jin, David Bastviken, Lishan Tan, Chuan Tong
Dissolved inorganic nutrients (NO2(-)-N, NO3(-)-N, NH4(+)-N, and PO4(3-)-P) play a critical role in the effective management of water quality and prevention of fish and shrimp diseases in aquaculture systems. In this study, dissolved inorganic nutrient concentrations in the water column and sediment porewater, and the fluxes across the sediment-water interface (SWI) were investigated in three intensive shrimp ponds with zero water exchange to examine nutrient cycling during the different growth stages of shrimps...
June 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28627495/disease-and-mortality-among-yesso-scallops-patinopecten-yessoensis-putatively-caused-by-infection-with-francisella-halioticida
#10
Gary R Meyer, Geoffrey J Lowe, Scott R Gilmore, Susan M Bower
During the fall of 2015, up to 40% mortality occurred in juvenile Yesso scallops Patinopecten yessoensis at an aquaculture site in Baynes Sound, British Columbia, Canada. Macroscopic lesions were present in 11% of the scallops, and histopathology consisting of multifocal and diffuse haemocyte infiltration was observed in 44% of the specimens examined. Histologically, small Gram-negative intracellular bacteria-like particles were observed within necrotic haemocytes of the lesions, suggesting a bacterial aetiology...
June 19, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28627491/survival-growth-performance-and-immune-capacity-of-the-juvenile-lined-seahorse-hippocampus-erectus-fed-with-rifampicin-treated-copepods
#11
Tingting Lin, Changbo Wang, Xin Liu, Fen Gao, Dongxue Xiao, Dong Zhang, Xialian Zhu
Gastrointestinal disease is one of the most serious diseases in cultured seahorse juveniles. Treatment with antimicrobials of live food (i.e. copepods and Artemia) that is used to feed the juveniles may be a promising measure to alleviate the occurrence of gastrointestinal disease. However, relevant investigations are rare. In the present study, we first investigated the antimicrobial efficacies on bacteria within copepods that were treated with 4 antimicrobials, including 3 antibiotics (i.e. enrofloxacin hydrochloride, oxytetracycline and rifampicin [RFP]) that are approved for use in aquaculture and 1 disinfectant (i...
June 19, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28627490/genotyping-and-antimicrobial-resistance-genes-of-yersinia-ruckeri-isolates-from-rainbow-trout-farms
#12
Muhammed Duman, Soner Altun, Murat Cengiz, Izzet Burcin Saticioglu, Ayse Gul Buyukekiz, Pinar Sahinturk
In this study, we compared 142 Yersinia ruckeri isolates collected between 2013 and 2016 from 6 different regions in Turkey. A total of 18 different genogroups were found, though most of the isolates clustered into the same genogroup as serotype O1. As immunization of fish with inactivated Y. ruckeri by injection, immersion, or feeding provide minimal protection against Y. ruckeri infection in Turkey, many fish producers use antimicrobials unrestrictedly, resulting in antimicrobial resistance in aquatic pathogens...
June 19, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28627489/treatment-of-francisella-infections-via-plga-and-lipid-based-nanoparticle-delivery-of-antibiotics-in-a-zebrafish-model
#13
Lilia S Ulanova, Marina Pinheiro, Carina Vibe, Claudia Nunes, Dorna Misaghian, Steven Wilson, Kaizheng Zhu, Federico Fenaroli, Hanne C Winther-Larsen, Salette Reis, Gareth Griffiths
We tested the efficiency of 2 different antibiotics, rifampicin and oxolinic acid, against an established infection caused by fish pathogen Francisella noatunensis ssp. orientalis (F.n.o.) in zebrafish. The drugs were tested in the free form as well as encapsulated into biodegradable nanoparticles, either polylactic-co-glycolic acid (PLGA) nanoparticles or nanostructured lipid carriers. The most promising therapies were PLGA-rifampicin nanoparticles and free oxolinic acid; the PLGA nanoparticles significantly delayed embryo mortality while free oxolinic acid prevented it...
June 19, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28626004/sex-chromosome-evolution-heterochiasmy-and-physiological-qtl-in-the-salmonid-brook-charr-salvelinus-fontinalis
#14
Ben J G Sutherland, Ciro Rico, Céline Audet, Louis Bernatchez
Whole genome duplication can have large impacts on genome evolution, and much remains unknown about these impacts. This includes the mechanisms of coping with a duplicated sex determination system and whether this has an impact on increasing the diversity of sex determination mechanisms. Other impacts include sexual conflict, where alleles having different optimums in each sex can result in sequestration of genes into non-recombining sex chromosomes. Sex chromosome development itself may involve sex-specific recombination rate (i...
June 16, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28625124/occurrence-and-importance-of-plant-lipids-a-promising-insight-into-algae
#15
Nihed Ben Halima
BACKGROUND: Lipids are biomolecules with interesting structural variability. They are involved in many processes such as the storage of energy, in nutrition and are also of relevance for signal transduction processes, in apoptosis, cell differentiation and phagocytosis, etc. Algae and microalgae are a promising and very diverse group of organisms. These living arganisms inhabit a vaste range of ecosystems from the Antarctic to the Deserts. They account for above half the primary productivity at the base of the food chain because of their multiple nutritional products including, for instance, lipids...
June 19, 2017: Recent Patents on Food, Nutrition & Agriculture
https://www.readbyqxmd.com/read/28623029/efficacy-of-plga-microparticle-encapsulated-formalin-killed-aeromonas-hydrophila-cells-as-a-single-shot-vaccine-against-a-hydrophila-infection
#16
Saekil Yun, Jin Woo Jun, Sib Sankar Giri, Hyoun Joong Kim, Cheng Chi, Sang Geun Kim, Sang Wha Kim, Se Chang Park
Control and prevention of disease is a high priority in aquaculture, and vaccination is important to prevent outbreaks. Here, poly(d,l-lactide-co-glycolic acid) (PLGA) microparticles (MPs) approximately 36μm in diameter were used to encapsulate and deliver Aeromonas hydrophila formalin-killed cells (FKC) as an antigen, and the innate and adaptive immune responses of cyprinid loaches and common carp were assessed following vaccination. The antigen was confirmed to be well encapsulated by scanning electron microscopy analysis of PLGA MP sections...
June 13, 2017: Vaccine
https://www.readbyqxmd.com/read/28622987/bioremediation-using-gracilaria-lemaneiformis-to-manage-the-nitrogen-and-phosphorous-balance-in-an-integrated-multi-trophic-aquaculture-system-in-yantian-bay-china
#17
Zhangliang Wei, Jiaguo You, Hailong Wu, Fangfang Yang, Lijuan Long, Qiao Liu, Yuanzi Huo, Peimin He
To reduce negative environmental impacts from human aquaculture activities, the red alga Gracilaria lemaneiformis was co-cultured with the fish Pseudosciaena crocea in an integrated multi-trophic aquaculture (IMTA) system for 35d in Yantian Bay. The eutrophication index value decreased from 14.5 to 8.4 after seaweeds were co-cultured in cage farming areas, which indicated that the eutrophic water column in Yantian Bay could be mediated by IMTA. Total DIN and DIP of the tidal input and output were 9.23kg, 0...
June 13, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28622859/multilocus-sequence-analysis-reveals-extensive-genetic-variety-within-tenacibaculum-spp-associated-with-ulcers-in-sea-farmed-fish-in-norway
#18
Anne Berit Olsen, Snorre Gulla, Terje Steinum, Duncan J Colquhoun, Hanne K Nilsen, Eric Duchaud
Skin ulcer development in sea-reared salmonids, commonly associated with Tenacibaculum spp., is a significant fish welfare- and economical problem in Norwegian aquaculture. A collection of 89 Tenacibaculum isolates was subjected to multilocus sequence analysis (MLSA). The isolates were retrieved from outbreaks of clinical disease in farms spread along the Norwegian coast line from seven different fish species over a period of 19 years. MLSA analysis reveals considerable genetic diversity, but allows identification of four main clades...
June 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28620315/you-are-what-you-eat-a-genomic-analysis-of-the-gut-microbiome-of-captive-and-wild-octopus-vulgaris-paralarvae-and-their-zooplankton-prey
#19
Álvaro Roura, Stephen R Doyle, Manuel Nande, Jan M Strugnell
The common octopus (Octopus vulgaris) is an attractive species for aquaculture, however, several challenges inhibit sustainable commercial production. Little is known about the early paralarval stages in the wild, including diet and intestinal microbiota, which likely play a significant role in development and vitality of this important life stage. High throughput sequencing was used to characterize the gastrointestinal microbiome of wild O. vulgaris paralarvae collected from two different upwelling regions off the coast of North West Spain (n = 41) and Morocco (n = 35)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28620313/digestive-physiology-of-octopus-maya-and-o-mimus-temporality-of-digestion-and-assimilation-processes
#20
REVIEW
Pedro Gallardo, Alberto Olivares, Rosario Martínez-Yáñez, Claudia Caamal-Monsreal, Pedro M Domingues, Maite Mascaró, Ariadna Sánchez, Cristina Pascual, Carlos Rosas
Digestive physiology is one of the bottlenecks of octopus aquaculture. Although, there are successful experimentally formulated feeds, knowledge of the digestive physiology of cephalopods is fragmented, and focused mainly on Octopus vulgaris. Considering that the digestive physiology could vary in tropical and sub-tropical species through temperature modulations of the digestive dynamics and nutritional requirements of different organisms, the present review was focused on the digestive physiology timing of Octopus maya and Octopus mimus, two promising aquaculture species living in tropical (22-30°C) and sub-tropical (15-24°C) ecosystems, respectively...
2017: Frontiers in Physiology
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