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https://www.readbyqxmd.com/read/29052740/short-term-effects-of-the-anti-sea-lice-therapeutant-emamectin-benzoate-on-clam-worms-nereis-virens
#1
G J McBriarty, K A Kidd, L E Burridge
The polychaete Nereis virens occurs commonly in marine sediments, is widely distributed, and is a popular bait species, as well as a potential replacement for wild-caught fish in commercial fish feed preparations. It is being considered as a potential co-extractive species for culture in integrated multi-trophic aquaculture operations. However, it is not known whether pesticides or drugs used to treat sea lice on farmed salmon, such as emamectin benzoate (EB), would adversely affect cultured or wild worms, because these compounds may persist in the environment...
October 20, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29051075/the-evolution-and-functional-characterization-of-lined-seahorse-hippocampus-erectus-ccks-involved-in-fasting-and-thermal-stress-response
#2
Huixian Zhang, Geng Qin, Jinhui Sun, Bo Zhang, Qiang Lin
The peptide cholecystokinin (CCK) plays an important role in the regulation of vertebrate appetite and feeding behaviour. In the present study, the full-length cDNA and genomic DNA sequences of two CCK precursors were cloned and analysed in the Syngnathidae fish, the lined seahorse (Hippocampus erectus). Both CCK1 and CCK2 in the seahorse consist of four exons. The sequence of the octapeptide of seahorse CCK1 (DYMGWMDF) was the same as that of the chicken and human, while the octapeptide of seahorse CCK2 (DYEGWMDF) was unique among vertebrates...
October 16, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29050988/physiological-and-immune-response-of-juvenile-rainbow-trout-to-dietary-bovine-lactoferrin
#3
Trinh Dinh Khuyen, Syaghalirwa N M Mandiki, Valérie Cornet, Jessica Douxfils, Stéphane Betoulle, Peter Bossier, Felipe E Reyes-López, Lluis Tort, Patrick Kestemont
Lactoferrin, a large multifunctional glycoprotein, is involved in many physiological functions but its immunomodulatory pathways are not well characterized in fish. The objective of the present study was to investigate the temporal effect of dietary bovine lactoferrin (BLf) at low (0.1%) and high (1%) on immunological organs of rainbow trout juveniles. BLf diets did not affect specific growth rate, haematocrit, splenic index, spleen respiratory burst activity as well as humoral (mIgM) and neutrophils (MPO) gene expressions after short term - 35 days (D35) and long term nutrient test - 51 days (D51) of feeding...
October 16, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29044430/molecular-regulation-of-sex-change-induced-by-methyltestosterone-feeding-and-methyltestosterone-feeding-withdrawal-in-the-protogynous-orange-spotted-grouper
#4
Qing Wang, Yun Liu, Cheng Peng, Xiang Wang, Ling Xiao, Dengdong Wang, Jiaxing Chen, Haifa Zhang, Huihong Zhao, Shuisheng Li, Yong Zhang, Haoran Lin
The sex identity of fish can be easily manipulated by exogenous hormones. Treatment with 17-methyltestosterone (MT) has been widely used to induce a male fate, but the molecular and cellular processes underlying sex changes induced by MT treatments and the withdrawal of MT are not well studied. In this study, we systematically investigated gonadal histology, gene expression profiles, sex steroid hormone levels, and cellular changes during sex changes induced by MT-feeding and MT-feeding withdrawal in the protogynous orange-spotted grouper, Epinephelus coioides...
August 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29043389/biomagnification-of-mercury-in-fish-from-two-gold-mining-impacted-tropical-marshes-in-northern-colombia
#5
José Luis Marrugo-Negrete, Javier Alonso Ruiz-Guzmán, Ana Carolina Ruiz-Fernández
Total mercury concentrations (T-Hg) and stable isotope ratios (δ(15)N and δ(13)C) were analyzed in the muscle of fish, collected at two marshes impacted by gold mining in Northern Colombia, to evaluate the seasonal and spatial behavior of these variables and mercury biomagnification based on their relationship with δ(15)N ratios in the fish. There was not significant (p > 0.05) seasonal differences (dry and rainy season) in δ(15)N and δ(13)C values in none marsh, suggesting that these fish species keep a similar feed pattern within each marsh along the year...
October 17, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29042136/mercury-bioaccumulation-in-bats-reflects-dietary-connectivity-to-aquatic-food-webs
#6
Daniel J Becker, Matthew M Chumchal, Hugh G Broders, Jennifer M Korstian, Elizabeth L Clare, Thomas R Rainwater, Steven G Platt, Nancy B Simmons, M Brock Fenton
Mercury (Hg) is a persistent and widespread heavy metal with neurotoxic effects in wildlife. While bioaccumulation of Hg has historically been studied in aquatic food webs, terrestrial consumers can become contaminated with Hg when they feed on aquatic organisms (e.g., emergent aquatic insects, fish, and amphibians). However, the extent to which dietary connectivity to aquatic ecosystems can explain patterns of Hg bioaccumulation in terrestrial consumers has not been well studied. Bats (Order: Chiroptera) can serve as a model system for illuminating the trophic transfer of Hg given their high dietary diversity and foraging links to both aquatic and terrestrial food webs...
October 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29042066/lm-and-sem-study-on-the-swordfish-xiphias-gladius-tongue
#7
Francesco Abbate, Maria Cristina Guerrera, Mauro Cavallaro, Giuseppe Montalbano, Antonino Germanà, Maria Levanti
Swordfish (Xiphias gladius L. 1758) is a predatory and migratory fish. Its characteristic feature is a flat and sharp upper jaw forming a "sword". The adaptation of vertebrates, including fish, to their environment is strictly related to the capacity of feeding and is carried out by often severe modifications of the anatomy of the buccal cavity, especially of the tongue. The aim of this study is, using light and scanning electron microscopy and considering that no data are so far available about the morphology of the tongue in this species, to analyse the anatomical characteristics of the tongue, especially its dorsal surface...
October 13, 2017: Tissue & Cell
https://www.readbyqxmd.com/read/29040838/nutrient-sensing-and-metabolic-changes-after-methionine-deprivation-in-primary-muscle-cells-of-turbot-scophthalmus-maximus-l
#8
Haowen Jiang, Fuyun Bian, Huihui Zhou, Xuan Wang, Kaidi Wang, Kangsen Mai, Gen He
The low methionine content in plant-based diets is a major limiting factor for feed utilization by animals. However, the molecular consequences triggered by methionine deficiency have not been well characterized, especially in fish species, whose metabolism is unique in many aspects and important for aquaculture industry. In the present study, the primary muscle cells of turbot (Scophthalmus maximus L.) were isolated and treated with or without methionine for 12 h in culture. The responses of nutrient sensing pathways, the proteomic profiling of metabolic processes, and the expressions of key metabolic molecules were systematically examined...
September 14, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29040830/combined-toxicity-of-prevalent-mycotoxins-studied-in-fish-cell-line-and-zebrafish-larvae-revealed-that-type-of-interactions-is-dose-dependent
#9
Hongyuan Zhou, Saji George, Caixia Li, Subramaniam Gurusamy, Xiulan Sun, Zhiyuan Gong, He Qian
While, Aflatoxin B1 (AFB1), deoxynivalenol (DON) and zearalenone (ZEN) are the most prevalent mycotoxins co-existing in grain products and animal feeds, little is known about their combinatorial toxicities on aquatic life-forms. We studied the individual and combined effects of these mycotoxins in a fish cell line (BF-2) and zebrafish larvae (wild-type and transgenic). The types of interactions in mycotoxins combinations on cell viability were determined by using Chou-Talalay model. Induction of oxidative stress pathway in mycotoxins-exposed BF-2 cells was assessed using high content screening (HCS)...
October 3, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/29040259/introduction-of-various-allergenic-foods-during-infancy-reduces-risk-of-ige-sensitization-at-12-months-of-age-a-birth-cohort-study
#10
Man-Chin Hua, Tsung-Chieh Yao, Chien-Chang Chen, Ming-Han Tsai, Sui-Ling Liao, Shen-Hao Lai, Chih-Yung Chiu, Kuan-Wen Su, Kuo-Wei Yeh, Jing-Long Huang
BackgroundIn this study, we aimed to determine whether introducing various allergenic foods during infancy is associated with IgE sensitization at 12 months of age.MethodsDetailed information on feeding practices regarding six possible allergenic foods (fruits, egg white, egg yolk, fish, shellfish, and peanuts) was obtained by administering age-specific questionnaires to parents of infants at ages 6 and 12 months. Fecal secretory IgA (sIgA), fecal eosinophil cationic protein (ECP), and serum levels of total IgE and IgE specific to 20 foods, and IgE specific to 20 inhalant allergens were also quantified at 12 months of age...
November 2017: Pediatric Research
https://www.readbyqxmd.com/read/29039295/effects-of-feeding-low-fishmeal-diets-with-increasing-soybean-meal-levels-on-growth-gut-histology-and-plasma-biochemistry-of-sea-bass
#11
E Bonvini, A Bonaldo, L Mandrioli, R Sirri, F Dondi, C Bianco, R Fontanillas, F Mongile, P P Gatta, L Parma
The aquaculture industry depends upon the development of sustainable protein sources to replace fishmeal (FM) in aquafeeds and the products derived from soybeans are some of the most studied plant feedstuffs. A key area of investigation for continuing to improve modern aquafeeds includes the evaluation of varying proportions and combinations of plant ingredients to identify mixtures that are more efficiently utilized by the fish. This study investigated the effects of increasing soybean meal (SBM) by replacing a mix of plant ingredients in low FM (20%) diets on growth, blood biochemistry profile and gut histology on European sea bass...
October 17, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/29038311/integration-of-swimming-kinematics-and-ram-suspension-feeding-in-a-model-american-paddlefish-polyodon-spathula
#12
Grant E Haines, S Laurie Sanderson
Ram suspension-feeding fishes swim with an open mouth to force water through the oral cavity and extract prey items that are too small to be pursued individually. Recent research has indicated that, rather than using a dead-end mechanical sieve, American paddlefish (Polyodon spathula Walbaum) employ vortical cross-step filtration. In this filtration mechanism, vortical flow that is generated posterior to the branchial arches organizes crossflow filtration processes into a spatial structure across the gill rakers...
October 16, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29037386/influence-of-temperature-and-exercise-on-growth-performance-muscle-and-adipose-tissue-in-pacus-piaractus-mesopotamicus
#13
Vander Bruno Dos Santos, Marcelo Wendeborn Miranda de Oliveira, Rondinelle Artur Simões Salomão, Rosemeire de Souza Santos, Tassiana Gutierrez de Paula, Maeli Dal Pai Silva, Edson Assunção Mareco
The aim of this study was to evaluate the effects of temperature and swimming exercise on fish growth in pacus (Piaractus mesopotamicus). Pacus weighing 0.9 - 1.9g and 2.7 - 4.2cm in standard length were cultivated at an initial density of 120 fish m(-3) in 3 recirculation systems containing 6 water tanks at a volume of 0.5m(3) each at temperatures of 24, 28 and 32°C. At each temperature, three tanks were modified to generate exercise activity in the specimens and force the fish to swim under a current speed of 27...
October 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/29037382/influences-of-dietary-lipid-and-temperature-on-growth-fat-deposition-and-lipoprotein-lipase-expression-in-darkbarbel-catfish-pelteobagrus-vachellii
#14
Jun Qiang, Yi-Fan Tao, Jie He, Jin-Wen Bao, Hong-Xia Li, Wen-Bo Shi, Pao Xu, Yi-Lan Sun
Darkbarbel catfish (Pelteobagrus vachellii) is an important freshwater fish in China. Water temperature greatly influences the absorption and utilization of dietary lipid by fish. Response values (including growth, hepatic fat deposition, and gene expression) for darkbarbel catfish mediated by two factors (water temperature 20-34°C; dietary lipid level 2-17%) were the focus of this study. The relationship between the two factors and the response values was evaluated by the response surface method using the central composite design...
October 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/29035010/ecosystem-regime-shifts-disrupt-trophic-structure
#15
Tessa N Hempson, Nicholas A J Graham, M Aaron MacNeil, Andrew S Hoey, Shaun K Wilson
Regime shifts between alternative stable ecosystem states are becoming commonplace due to the combined effects of local stressors and global climate change. Alternative states are characterised as substantially different in form and function to pre-disturbance states, disrupting the delivery of ecosystem services and functions. On coral reefs, regime shifts are typically characterised by a change in the benthic composition from coral- to macroalgal-dominance. Such fundamental shifts in the benthos are anticipated to impact associated fish communities that are reliant on the reef for food and shelter, yet there is limited understanding of how regime shifts propagate through the fish community over time, relative to initial or recovery conditions...
October 16, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/29032627/complementary-feeding-practices-for-infants-and-young-children-in-south-asia-a-review-of-evidence-for-action-post-2015
#16
Víctor M Aguayo
Some 37% (~64 million) South Asian children under 5 years are stunted. Most stunting occurs during the complementary feeding period (6-23 months). Our objective was to (a) characterize complementary feeding practices in South Asia and (b) review the effectiveness of information, education, and counselling (IEC) interventions aiming to improve complementary feeding in South Asia. We conducted a comprehensive review of (a) the latest nationally representative survey data and (b) peer-reviewed interventions (January 1990 to December 2015) that used IEC as the main strategy to improve complementary feeding...
October 2017: Maternal & Child Nutrition
https://www.readbyqxmd.com/read/29032040/effects-of-dietary-ginkgo-biloba-leaf-extract-on-growth-performance-plasma-biochemical-parameters-fish-composition-immune-responses-liver-histology-and-immune-and-apoptosis-related-genes-expression-of-hybrid-grouper-epinephelus-lanceolatus%C3%A2-%C3%A3-epinephelus-fuscoguttatus%C3%A2
#17
Xiaohong Tan, Zhenzhu Sun, Qingying Liu, Huaqun Ye, Cuiyun Zou, Chaoxia Ye, Anli Wang, Heizhao Lin
For thousands of years, leaves from the Ginkgo biloba tree have been a common treatment in Chinese medicine. The present study was conducted to investigate the effects of dietary ginkgo biloba leaf extract (GBE) supplementation on growth performance, plasma biochemical parameters, fish composition, immune responses, liver histology, and immune and apoptosis-related genes expression of hybrid grouper (Epinephelus lanceolatus♂ × Epinephelus fuscoguttatus♀) fed high lipid diets. A basal diet supplemented with GBE at 0, 0...
October 11, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29023065/enzyme-digestive-activities-during-ontogeny-in-marosatherina-ladigesi-larvae
#18
Jayadi, Amrah Husma, Ilmia
BACKGROUND AND OBJECTIVE: Marosatherina ladigesi, including native fish in South Sulawesi Indonesia, are vulnerable and must be preserved. The objective of the study was to examine known food consumption, survival, growth and the activities of digestive enzymes of M. ladigesi larvae. MATERIAL AND METHODS: The larvae were obtained from natural spawning and the mixed live feed: Infusoria sp., Daphnia sp. and Artemia salina were given twice a day. Feed intake, growth, survival, activities of protease, lipase and amylase enzymes were observed in ages 3, 5, 10, 15, 20, 25, 30, 35 Days after Hatching (DAH)...
2017: Pakistan Journal of Biological Sciences: PJBS
https://www.readbyqxmd.com/read/29021795/neuroendocrine-and-immune-responses-undertake-different-fates-following-tryptophan-or-methionine-dietary-treatment-tales-from-a-teleost-model
#19
Rita Azeredo, Marina Machado, António Afonso, Camino Fierro-Castro, Felipe E Reyes-López, Lluis Tort, Manuel Gesto, Marta Conde-Sieira, Jesús M Míguez, José L Soengas, Eva Kreuz, Sven Wuertz, Helena Peres, Aires Oliva-Teles, Benjamin Costas
Methionine and tryptophan appear to be fundamental in specific cellular pathways involved in the immune response mechanisms, including stimulation of T-regulatory cells by tryptophan metabolites or pro-inflammatory effects upon methionine supplementation. Thus, the aim of this study was to evaluate the immunomodulatory effect of these amino acids on the inflammatory and neuroendocrine responses in juveniles of European seabass, Dicentrarchus labrax. To achieve this, goal fish were fed for 14 days methionine and tryptophan-supplemented diets (MET and TRP, respectively, 2× dietary requirement level) or a control diet meeting the amino acids requirement levels (CTRL)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29021622/the-circadian-transcriptome-of-marine-fish-sparus-aurata-larvae-reveals-highly-synchronized-biological-processes-at-the-whole-organism-level
#20
M Yúfera, E Perera, J A Mata-Sotres, J Calduch-Giner, G Martínez-Rodríguez, J Pérez-Sánchez
The regulation of circadian gene expression remains largely unknown in farmed fish larvae. In this study, a high-density oligonucleotide microarray was used to examine the daily expression of 13,939 unique genes in whole gilthead sea bream (Sparus aurata) larvae with fast growth potentiality. Up to 2,229 genes were differentially expressed, and the first two components of Principal Component Analysis explained more than 81% of the total variance. Clustering analysis of differentially expressed genes identified 4 major clusters that were triggered sequentially, with a maximum expression at 0 h, 3 h, 9-15 h and 18-21 h zeitgeber time...
October 11, 2017: Scientific Reports
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