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https://www.readbyqxmd.com/read/28727218/altered-sediment-biota-and-lagoon-habitat-carbonate-dynamics-due-to-sea-cucumber-bioturbation-in-a-high-pco2-environment
#1
Kennedy Wolfe, Francisco Vidal-Ramirez, Sophie Dove, Dione Deaker, Maria Byrne
The effects of global change on biological systems and functioning are already measureable, but how ecological interactions are being altered is poorly understood. Ecosystem resilience is strengthened by ecological functionality, which depends on trophic interactions between key species and resilience generated through biogenic buffering. Climate-driven alterations to coral reef metabolism, structural complexity and biodiversity are well documented, but the feedbacks between ocean change and trophic interactions of non-coral invertebrates are understudied...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28727143/predator-ontogeny-affects-expression-of-inducible-defense-morphology-in-rotifers
#2
Huan Zhang, Christer Brönmark, Lars-Anders Hansson
Many prey organisms show induced morphological responses to predators including changes in protective spine length, such as in rotifers, although previous studies have mainly focused on how prey become larger than the predator gape-size optimum. Here we show that a large-sized predator makes prey rotifers escape below the gape-size optimum of the predator by reducing spine length. Hence, in experiments and field studies we show that during part of their ontogeny fish larvae feed intensively on the common rotifer Keratella cochlearis, and that larval fish predation reduces rotifer spine length both through induction of shorter spines and selective predation on long-spined individuals...
July 20, 2017: Ecology
https://www.readbyqxmd.com/read/28727079/detection-of-dietary-dna-protein-and-glyphosate-in-meat-milk-and-eggs
#3
A L Van Eenennaam, A E Young
Products such as meat, milk, and eggs from animals that have consumed genetically engineered (GE) feed are not currently subject to mandatory GE labeling requirements. Some voluntary "non-genetically modified organism" labeling has been associated with such products, indicating that the animals were not fed GE crops, as there are no commercialized GE food animals. This review summarizes the available scientific literature on the detection of dietary DNA and protein in animal products and briefly discusses the implications of mandatory GE labeling for products from animals that have consumed GE feed...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726095/fatty-acid-composition-of-fish-species-with-different-feeding-habits-from-an-arctic-lake
#4
M I Gladyshev, N N Sushchik, L A Glushchenko, V A Zadelenov, A E Rudchenko, Y Y Dgebuadze
We compared the composition and content of fatty acids (FAs) in fish with different feeding habits (sardine (least) cisco Coregonus sardinella, goggle-eyed charr (pucheglazka) form of Salvelinus alpinus complex, humpback whitefish Coregonus pidschian, broad whitefish Coregonus nasus, boganid charr Salvelinus boganidae, and northern pike Esox lucius from an Arctic Lake. Feeding habits of the studied fish (planktivore, benthivore, or piscivore) significantly affected the composition of biomarker fatty acids and the ratio of stable isotopes of carbon and nitrogen in their biomass...
May 2017: Doklady. Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28725670/fatty-acid-and-lipidomic-data-in-normal-and-tumor-colon-tissues-of-rats-fed-diets-with-and-without-fish-oil
#5
Zora Djuric, Muhammad Nadeem Aslam, Becky R Simon, Ananda Sen, Yan Jiang, Jianwei Ren, Rena Chan, Tanu Soni, Thekkelnaycke M Rajendiran, William L Smith, Dean E Brenner
Data is provided to show the detailed fatty acid and lipidomic composition of normal and tumor rat colon tissues. Rats were fed either a Western fat diet or a fish oil diet, and half the rats from each diet group were treated with chemical carcinogens that induce colon cancer (azoxymethane and dextran sodium sulfate). The data show total fatty acid profiles of sera and of all the colon tissues, namely normal tissue from control rats and both normal and tumor tissues from carcinogen-treated rats, as obtained by gas chromatography with mass spectral detection...
August 2017: Data in Brief
https://www.readbyqxmd.com/read/28724735/dual-function-of-the-pectoral-girdle-for-feeding-and-locomotion-in-white-spotted-bamboo-sharks
#6
Ariel L Camp, Bradley Scott, Elizabeth L Brainerd, Cheryl D Wilga
Positioned at the intersection of the head, body and forelimb, the pectoral girdle has the potential to function in both feeding and locomotor behaviours-although the latter has been studied far more. In ray-finned fishes, the pectoral girdle attaches directly to the skull and is retracted during suction feeding, enabling the ventral body muscles to power rapid mouth expansion. However, in sharks, the pectoral girdle is displaced caudally and entirely separate from the skull (as in tetrapods), raising the question of whether it is mobile during suction feeding and contributing to suction expansion...
July 26, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28724486/behavioral-characteristics-of-adult-zebrafish-danio-rerio-after-ms222-anesthesia-for-fin-excision
#7
Mélissa Cm De Lombaert, Elizabeth L Rick, Lisa A Krugner-Higby, Marc A Wolman
The health of laboratory animals is an ethical responsibility of researchers and a critical determinant of experimental outcome. Therefore, all husbandry procedures should be evaluated for their effects on mortality, behavior, and physiology to maximize animal welfare and minimize experimental variability. For adult zebrafish, the excision of a small portion of the caudal fin (that is, 'fin clipping') under MS222 anesthesia is a common procedure to obtain tissue for genotyping. The potential effect of this procedure on behavioral and physiologic assays of feeding, anxiety, and stress has not previously been assessed...
July 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28724250/reuse-water-exposure-duration-seasonality-and-treatment-affect-tissue-responses-in-a-model-fish
#8
B J Blunt, A Singh, L Wu, M Gamal El-Din, M Belosevic, K B Tierney
Partially remediated gray (reuse) water will likely find increasing use in a variety of applications owing to the increasing scarcity of freshwater. We aimed to determine if a model fish, the goldfish, could sense reuse water using olfaction (smell), and if 30min or 7d (acute) and 60d (sub-chronic) exposures would affect their olfactory responses to natural odorants. We examined olfaction as previous studies have found that numerous chemicals can impair the olfactory sense, which is critical to carrying out numerous life-sustaining behaviors from feeding to mating...
July 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28723948/integrative-functional-analyses-using-rainbow-trout-selected-for-tolerance-to-plant-diets-reveal-nutrigenomic-signatures-for-soy-utilization-without-the-concurrence-of-enteritis
#9
Jason Abernathy, Andreas Brezas, Kevin R Snekvik, Ronald W Hardy, Ken Overturf
Finding suitable alternative protein sources for diets of carnivorous fish species remains a major concern for sustainable aquaculture. Through genetic selection, we created a strain of rainbow trout that outperforms parental lines in utilizing an all-plant protein diet and does not develop enteritis in the distal intestine, as is typical with salmonids on long-term plant protein-based feeds. By incorporating this strain into functional analyses, we set out to determine which genes are critical to plant protein utilization in the absence of gut inflammation...
2017: PloS One
https://www.readbyqxmd.com/read/28723584/the-relationship-between-growth-performance-and-metabolic-rate-flexibility-varies-with-food-availability-in-juvenile-qingbo-spinibarbus-sinensis
#10
Ling-Qing Zeng, Lei Wang, Guang-Nan Wang, Yue Zeng, Shi-Jian Fu
Phenotypic flexibility in traits can allow organisms to cope with environmental challenges. However, the ecological consequences (e.g., growth) of SMR flexibility in fish are poorly understood. Juvenile qingbo (Spinibarbus sinensis) were reared individually with two levels of food resources (satiation or limited) with either continuous feeding (CF) or starvation-refeeding (SR). In the CF experiment, SMR increased when individuals were fed either the satiation or limited diets, but no difference was found in average specific growth rate somatic growth (SGR) between the two food availabilities...
July 16, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28721583/microbial-and-genetically-engineered-oils-as-replacements-for-fish-oil-in-aquaculture-feeds
#11
REVIEW
M Sprague, M B Betancor, D R Tocher
As the global population grows more of our fish and seafood are being farmed. Fish are the main dietary source of the omega-3 (n-3) long-chain polyunsaturated fatty acids (LC-PUFA), eicosapentaenoic (EPA) and docosahexaenoic (DHA) acids, but these cannot be produced in sufficient quantities as are now required for human health. Farmed fish have traditionally been fed a diet consisting of fishmeal and fish oil, rich in n-3 LC-PUFA. However, the increase in global aquaculture production has resulted in these finite and limited marine ingredients being replaced with sustainable alternatives of terrestrial origin that are devoid of n-3 LC-PUFA...
July 18, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28716367/redefining-essential-fatty-acids-in-the-era-of-novel-intravenous-lipid-emulsions
#12
REVIEW
Lorenzo Anez-Bustillos, Duy T Dao, Gillian L Fell, Meredith A Baker, Kathleen M Gura, Bruce R Bistrian, Mark Puder
The essentiality of fatty acids was determined by the Burrs in the 1920s. It is commonly accepted that provision of linoleic (LA) and alpha-linolenic acids (ALA) prevents and reverses essential fatty acid deficiency (EFAD). Development of alternative injectable lipid emulsions (ILE) low in LA and ALA has raised concern about their ability to prevent EFAD. This review provides biochemical evidence coupled with observations from animal and human studies that aim to characterize which fatty acids are truly essential to prevent EFAD...
July 8, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28712005/an-overview-of-the-ongoing-insights-in-selenium-research-and-its-role-in-fish-nutrition-and-fish-health
#13
REVIEW
Kifayat Ullah Khan, Amina Zuberi, João Batista Kochenborger Fernandes, Imdad Ullah, Huda Sarwar
In the present review, the ongoing researches about selenium research in fish nutrition have been comprehensively discussed. Selenium research is getting popularity in fish nutrition as it is required for the normal growth and proper physiological and biochemical functions in fish. Its deficiency or surplus amounts create severe problems in fish. It is available as inorganic form, organic form, and nano form. In fish, most of the previous research is about the selenium requirements for fish by using only one selenium source mainly the inorganic one...
July 15, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28705720/dietary-supplementation-with-selenium-yeast-and-tea-polyphenols-improve-growth-performance-and-nitrite-tolerance-of-wuchang-bream-megalobrama-amblycephala
#14
Meng Long, Wang Lin, Jie Hou, Honghui Guo, Li Li, Dapeng Li, Rong Tang, Fan Yang
In order to explore the effects of dietary selenium yeast, tea polyphenols and their combination on growth of Wuchang bream (Megalobrama amblycephala) and its resistance to nitrite stress, 360 healthy Wuchang bream with initial body weight of (55.90 ± 2.60) g were randomly divided into four groups: a control group fed with basal diet and three treated groups fed with basal diets supplemented with 0.50 mg/kg selenium yeast, 50 mg/kg tea polyphenols, and the combination of 0.50 mg/kg selenium yeast and 50 mg/kg tea polyphenols, respectively...
July 10, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28704486/a-common-bottlenose-dolphin-tursiops-truncatus-prey-handling-technique-for-marine-catfish-ariidae-in-the-northern-gulf-of-mexico
#15
Errol I Ronje, Kevin P Barry, Carrie Sinclair, Mark A Grace, Nélio Barros, Jason Allen, Brian Balmer, Anna Panike, Christina Toms, Keith D Mullin, Randall S Wells
Few accounts describe predator-prey interactions between common bottlenose dolphins (Tursiops truncatus Montagu 1821) and marine catfish (Ariopsis felis Linnaeus 1766, Bagre marinus Mitchill 1815). Over the course of 50,167 sightings of bottlenose dolphin groups in Mississippi Sound and along the Florida coast of the Gulf of Mexico, severed catfish heads were found floating and exhibiting movements at the surface in close proximity to 13 dolphin groups that demonstrated feeding behavior. These observations prompted a multi-disciplinary approach to study the predator-prey relationship between bottlenose dolphins and marine catfish...
2017: PloS One
https://www.readbyqxmd.com/read/28704386/nannochloropsis-oceania-derived-defatted-meal-as-an-alternative-to-fishmeal-in-atlantic-salmon-feeds
#16
Mette Sørensen, Yangyang Gong, Fridrik Bjarnason, Ghana K Vasanth, Dalia Dahle, Mark Huntley, Viswanath Kiron
Defatted microalgal biomass derived from biorefinery can be potential feed ingredients for carnivorous fish. The present study investigated the growth, feed intake:gain and health parameters in Atlantic salmon fed for 84 days with defatted Nannochloropsis oceania as a fishmeal replacer. Fish fed feeds containing the algal biomass (at 10 and 20% inclusion, alga groups) were compared with groups that consumed alga-devoid feeds (control group). The fish that received 20% alga tended to have reduced weight gain and specific growth rate...
2017: PloS One
https://www.readbyqxmd.com/read/28701764/vertically-and-horizontally-transmitted-microbial-symbionts-shape-the-gut-microbiota-ontogenesis-of-a-skin-mucus-feeding-discus-fish-progeny
#17
François-Étienne Sylvain, Nicolas Derome
Fish gut microbial communities play key functions for their hosts, but their ontogenesis is poorly understood. Recent studies on the zebrafish suggest that gut symbionts are recruited naturally through horizontal transmission from environmental water. We used an alternative fish model, the discus (Symphysodon aequifasciata), to identify the main factors driving fish gut microbiota ontogenesis. The discus exhibits a unique parenting behavior: both discus parents vertically feed their fry with a cutaneous mucus secretion during three weeks post-hatching...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28699963/nitrogen-and-phosphorus-flux-from-the-production-of-nile-tilapia-through-the-application-of-environmental-indicators
#18
J A S Osti, M A B Moraes, C F Carmo, C T J Mercante
We aimed in this study utilize environmental indicators as a quantitative method to evaluate and discuss the nitrogen (TN) and phosphorus (TP) flux by a production stage grow-out (termination) of Nile tilapia (Oreochromis niloticus) in fishpond. The TN and TP load, the mass balance, the input of TN and TP via feed and the converted nutrients in fish biomass are the environmental indicators applied in this study. During the production cycle (128 days), the system exported 15,931 g TN and 4,189 g TP that were related to the amount of feed supplied (r Pearson = 0...
July 10, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28699726/in-vitro-digestibility-study-of-some-plant-protein-sources-as-aquafeed-for-carps-labeo-rohita-and-cyprinus-carpio-using-ph-stat-method
#19
Jai Gopal Sharma, Ashok Kumar, Deepak Saini, Nawang Lendup Targay, Bronson Kumar Khangembam, Rina Chakrabarti
Aquaculture, as a promising food industry, is expected to meet the demand for quality food from the increasing human population. As the diet is critical for feeding farm fish, such a faster growth in the industry is destined to create stress in the fishmeal market to supply diets to the tune. In this context, here, we studied the protein content of 20 plant ingredients, including aquatic weeds, cereals, pulses and oil-cakes using micro-Kjeldahl method and evaluated in vitro digestibility of these ingredients for rohu Labeo rohita and common carp Cyprinus carpio using pH-Stat method...
September 2016: Indian Journal of Experimental Biology
https://www.readbyqxmd.com/read/28698629/detecting-the-presence-of-fish-farm-derived-organic-matter-at-the-seafloor-using-stable-isotope-analysis-of-phospholipid-fatty-acids
#20
Daniel J Mayor, Nia B Gray, Giannina S I Hattich, Barry Thornton
The expansion of global aquaculture activities is important for the wellbeing of future generations in terms of employment and food security. Rearing animals in open-exchange cages permits the release of organic wastes, some of which ultimately reaches the underlying sediments. The development of rapid, quantitative and objective monitoring techniques is therefore central to the environmentally sustainable growth of the aquaculture industry. Here, we demonstrate that fish farm-derived organic wastes can be readily detected at the seafloor by quantifying sediment phospholipid fatty acids (PLFAs) and their carbon stable isotope signatures...
July 11, 2017: Scientific Reports
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