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https://www.readbyqxmd.com/read/29342152/do-nursery-habitats-provide-shelter-from-flow-for-juvenile-fish
#1
Darren M Parsons, Iain MacDonald, Dane Buckthought, Crispin Middleton
Juvenile fish nurseries are an essential life stage requirement for the maintenance of many fish populations. With many inshore habitats globally in decline, optimising habitat management by increasing our understanding of the relationship between juvenile fish and nursery habitats may be a prudent approach. Previous research on post-settlement snapper (Chrysophrys auratus) has suggested that structure may provide a water flow refuge, allowing snapper to access high water flow sites that will also have a high flux of their pelagic prey...
2018: PloS One
https://www.readbyqxmd.com/read/29341366/impact-of-multiple-stressors-on-juvenile-fish-in-estuaries-of-the-northeast-pacific
#2
Jason D Toft, Stuart H Munsch, Jeffery R Cordell, Kiira Siitari, Van C Hare, Brett Holycross, Lisa A DeBruyckere, Correigh M Greene, Brent B Hughes
A key step in identifying global change impacts on species and ecosystems is to quantify effects of multiple stressors. To date, the science of global change has been dominated by regional field studies, experimental manipulation, meta-analyses, conceptual models, reviews, and studies focusing on a single stressor or species over broad spatial and temporal scales. Here, we provide one of the first studies for coastal systems examining multiple stressor effects across broad scales, focused on the nursery function of 20 estuaries spanning 1600 km of coastline, 25 years of monitoring, and seven fish and invertebrate species along the northeast Pacific coast...
January 17, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29340152/impact-of-gas-emboli-and-hyperbaric-treatment-on-respiratory-function-of-loggerhead-sea-turtles-caretta-caretta
#3
Cyril Portugues, Jose Luis Crespo-Picazo, Daniel García-Párraga, Jordi Altimiras, Teresa Lorenzo, Alicia Borque-Espinosa, Andreas Fahlman
Fisheries interactions are the most serious threats for sea turtle populations. Despite the existence of some rescue centres providing post-traumatic care and rehabilitation, adequate treatment is hampered by the lack of understanding of the problems incurred while turtles remain entrapped in fishing gears. Recently it was shown that bycaught loggerhead sea turtles (Caretta caretta) could experience formation of gas emboli (GE) and develop decompression sickness (DCS) after trawl and gillnet interaction. This condition could be reversed by hyperbaric O2 treatment (HBOT)...
2018: Conservation Physiology
https://www.readbyqxmd.com/read/29339521/immunogenetic-novelty-confers-a-selective-advantage-in-host-pathogen-coevolution
#4
Karl P Phillips, Joanne Cable, Ryan S Mohammed, Magdalena Herdegen-Radwan, Jarosław Raubic, Karolina J Przesmycka, Cock van Oosterhout, Jacek Radwan
The major histocompatibility complex (MHC) is crucial to the adaptive immune response of vertebrates and is among the most polymorphic gene families known. Its high diversity is usually attributed to selection imposed by fast-evolving pathogens. Pathogens are thought to evolve to escape recognition by common immune alleles, and, hence, novel MHC alleles, introduced through mutation, recombination, or gene flow, are predicted to give hosts superior resistance. Although this theoretical prediction underpins host-pathogen "Red Queen" coevolution, it has not been demonstrated in the context of natural MHC diversity...
January 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29338808/ceratomyxa-gracillima-n-sp-cnidaria-myxosporea-provides-evidence-of-panmixia-and-ceratomyxid-radiation-in-the-amazon-basin
#5
Suellen A Zatti, Stephen D Atkinson, Antônio A M Maia, Jerri L Bartholomew, Edson A Adriano
We describe a new freshwater myxosporean species Ceratomyxa gracillima n. sp. from the gall bladder of the Amazonian catfish Brachyplatystoma rousseauxii; the first myxozoan recorded in this host. The new Ceratomyxa was described on the basis of its host, myxospore morphometry, ssrDNA and internal transcribed spacer region (ITS-1) sequences. Infected fish were sampled from geographically distant localities: the Tapajós River, Pará State, the Amazon River, Amapá State and the Solimões River, Amazonas State...
January 17, 2018: Parasitology
https://www.readbyqxmd.com/read/29334081/bio-inspired-all-optical-artificial-neuromast-for-2d-flow-sensing
#6
Ben J Wolf, Jonathan A S Morton, William Bill N MacPherson, Sietse M van Netten
We present the design, fabrication and testing of a novel all-optical 2D flow velocity sensor, inspired by a fish lateral line neuromast. This artificial neuromast consists of optical fibres inscribed with Bragg gratings supporting a fluid force recipient sphere. Its dynamic response is modelled based on the Stokes solution for unsteady flow around a sphere and found to agree with experimental results. Tuneable mechanical resonance is predicted, allowing a deconvolution scheme to accurately retrieve fluid flow speed and direction from sensor readings...
January 15, 2018: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/29334036/short-term-storage-of-the-oocytes-affects-the-ploidy-status-in-the-yellowtail-tetra-astyanax-altiparanae
#7
Matheus Pereira Dos Santos, Nivaldo Ferreira do Nascimento, George Shigueki Yasui, Nycolas Levy Pereira, Takafumi Fujimoto, José Augusto Senhorini, Laura Satiko Okada Nakaghi
In fish, many factors can affect reproduction during in vitro fertilization, therefore determination of the factors that affect affecting gamete quality is needed. However, few studies have focused on gamete quality and the ploidy status. This study was conducted to elucidate whether oocyte storage can affect ploidy status, survival, and embryo viability in the characid species Astyanax altiparanae. Oocytes were stored in Dulbecco's phosphate-buffered saline (PBS) at 26°C, then aliquots were fertilized immediately after extrusion (control) and also after 60, 120, 180, and 240 min of storage...
January 15, 2018: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/29331379/effect-of-histidine-on-sorafenib-induced-vascular-damage-analysis-using-novel-medaka-fish-model
#8
Yoko Shinagawa-Kobayashi, Kenya Kamimura, Ryo Goto, Kohei Ogawa, Ryosuke Inoue, Takeshi Yokoo, Norihiro Sakai, Takuro Nagoya, Akira Sakamaki, Satoshi Abe, Soichi Sugitani, Masahiko Yanagi, Koichi Fujisawa, Yoshizu Nozawa, Naoto Koyama, Hiroshi Nishina, Makoto Furutani-Seiki, Isao Sakaida, Shuji Terai
BACKGROUND: Sorafenib (SFN) is an anti-angiogenic chemotherapeutic that prolongs survival of patients with hepatocellular carcinoma (HCC); its side effects, including vascular damages such as hand-foot syndrome (HFS), are a major cause of therapy discontinuation. We previously reported that maintenance of peripheral blood flow by intake of dried bonito broth (DBB) significantly prevented HFS and prolonged the administration period. The amino acids contained in DBB probably contribute to its effects, but the mechanism has not been clarified...
January 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29330607/river-continuity-restoration-and-diadromous-fishes-much-more-than-an-ecological-issue
#9
H Drouineau, C Carter, M Rambonilaza, G Beaufaron, G Bouleau, A Gassiat, P Lambert, S le Floch, S Tétard, E de Oliveira
Ecosystem fragmentation is a serious threat to biodiversity and one of the main challenges in ecosystem restoration. River continuity restoration (RCR) has often targeted diadromous fishes, a group of species supporting strong cultural and economic values and especially sensitive to river fragmentation. Yet it has frequently produced mixed results and diadromous fishes remain at very low levels of abundance. Against this background, this paper presents the main challenges for defining, evaluating and achieving effective RCR...
January 12, 2018: Environmental Management
https://www.readbyqxmd.com/read/29326114/biomechanics-of-swimming-in-developing-larval-fish
#10
REVIEW
Cees J Voesenek, Florian T Muijres, Johan L van Leeuwen
Most larvae of bony fish are able to swim almost immediately after hatching. Their locomotory system supports several vital functions: fish larvae make fast manoeuvres to escape from predators, aim accurately during suction feeding and may migrate towards suitable future habitats. Owing to their small size and low swimming speed, larval fish operate in the intermediate hydrodynamic regime, which connects the viscous and inertial flow regimes. They experience relatively strong viscous effects at low swimming speeds, and relatively strong inertial effects at their highest speeds...
January 11, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29321874/conservation-planning-for-freshwater-marine-carryover-effects-on-chinook-salmon-survival
#11
Jennifer L Gosselin, Richard W Zabel, James J Anderson, James R Faulkner, António M Baptista, Benjamin P Sandford
Experiences of migratory species in one habitat may affect their survival in the next habitat, in what is known as carryover effects. These effects are especially relevant for understanding how freshwater experience affects survival in anadromous fishes. Here, we study the carryover effects of juvenile salmon passage through a hydropower system (Snake and Columbia rivers, northwestern United States). To reduce the direct effect of hydrosystem passage on juveniles, some fishes are transported through the hydrosystem in barges, while the others are allowed to migrate in-river...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29315637/rapid-detection-and-differentiation-of-carp-oedema-virus-and-cyprinid-herpes-virus-3-in-koi-and-common-carp
#12
H Soliman, M El-Matbouli
Carp oedema virus (CEV) and koi herpes virus (KHV) are of major concern to common carp breeders and koi enthusiasts worldwide. The viruses cause diseases that exhibit similar external signs; thus, it is difficult to distinguish between them clinically. In this study, we developed and optimized rapid and accurate single- and multiplex isothermal diagnostic tools, based on recombinase polymerase amplification (RPA), for detection and differentiation of CEV and KHV. The assays were combined with a lateral flow dipstick to enable visual detection of amplification products and simplify post-amplification analysis...
January 9, 2018: Journal of Fish Diseases
https://www.readbyqxmd.com/read/29306144/determination-of-environmental-flows-in-rivers-using-an-integrated-hydrological-hydrodynamic-habitat-modelling-approach
#13
A Stamou, A Polydera, G Papadonikolaki, F Martínez-Capel, R Muñoz-Mas, Ch Papadaki, S Zogaris, M-D Bui, P Rutschmann, E Dimitriou
We propose the novel integrated modelling procedure 3H-EMC for the determination of the environmental flow in rivers and streams; 3H-EMC combines Hydrological, Hydrodynamic and Habitat modelling with the use of the Environmental Management Classes (EMCs) that are defined by the Global Environmental Flow Calculator. We apply 3H-EMC in the Sperchios River in Central Greece, in which water abstractions for irrigation cause significant environmental impacts. Calculations of the hydrodynamic-habitat model, in which the large and the small chub are the main fish species, suggest discharge values that range from 1...
January 3, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29295926/preservation-of-the-genetic-diversity-of-a-local-common-carp-in-the-agricultural-heritage-rice-fish-system
#14
Weizheng Ren, Liangliang Hu, Liang Guo, Jian Zhang, Lu Tang, Entao Zhang, Jiaen Zhang, Shiming Luo, Jianjun Tang, Xin Chen
We examined how traditional farmers preserve the genetic diversity of a local common carp (Cyprinus carpio), which is locally referred to as "paddy field carp" (PF-carp), in a "globally important agricultural heritage system" (GIAHS), i.e., the 1,200-y-old rice-fish coculture system in Zhejiang Province, China. Our molecular and morphological analysis showed that the PF-carp has changed into a distinct local population with higher genetic diversity and diverse color types. Within this GIAHS region, PF-carps exist as a continuous metapopulation, although three genetic groups could be identified by microsatellite markers...
January 2, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29295924/motion-parallax-in-electric-sensing
#15
Federico Pedraja, Volker Hofmann, Kathleen M Lucas, Colleen Young, Jacob Engelmann, John E Lewis
A crucial step in forming spatial representations of the environment involves the estimation of relative distance. Active sampling through specific movements is considered essential for optimizing the sensory flow that enables the extraction of distance cues. However, in electric sensing, direct evidence for the generation and exploitation of sensory flow is lacking. Weakly electric fish rely on a self-generated electric field to navigate and capture prey in the dark. This electric sense provides a blurred representation of the environment, making the exquisite sensory abilities of electric fish enigmatic...
January 2, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29290061/effects-of-dissolved-organic-matter-feeding-and-water-flow-on-the-bioconcentration-of-diclofenac-in-crucian-carp-carassius-auratus
#16
Guanghua Lu, Zhengxin Xie, Zhenghua Zhang
Diclofenac (DCF), a prevalent anti-inflammatory drug, is frequently detected in aquatic organisms. However, little is known about the environmental factors that affect the bioconcentration of DCF in aquatic environments. Here, we firstly investigated the bioconcentration of DCF by crucian carp (Carassius auratus) following aqueous exposure (3.57, 14.5, and 71.8 μg L-1) for 21 days. DCF can accumulate in crucian carp, and the maximum bioconcentration factors (BCFs) of 121 L kg-1 in the liver, 52.3 L kg-1 in the gills, and 46...
December 30, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29288074/development-of-cross-priming-amplification-coupled-with-vertical-flow-visualization-for-rapid-detection-of-infectious-spleen-and-kidney-necrosis-virus-isknv-in-mandarin-fish-siniperca-chuatsi
#17
Wenzhi Liu, Yong Zhou, Yuding Fan, Nan Jiang, Kenneth Cain, Lingbing Zeng
Infectious spleen and kidney necrosis virus (ISKNV) has been recognized as the causative agent of the most serious disease in cultured mandarin fish, Siniperca chuatsi, in China. Disease outbreaks have resulted in substantial losses to the aquaculture industry. Currently, reliable laboratory detection and identification methods are available for this virus. However, rapid detection methods applicable for on-site diagnosis of this infectious agent are unavailable. To address this need, a nearly instrument-free, cost-effective and simple detection method was developed and optimized and incorporates cross priming amplification coupled with vertical flow visualization for rapid identification of ISKNV (ISKNV-CPA-VF)...
December 26, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/29246648/human-mesenchymal-stromal-cell-therapy-for-damaged-cochlea-repair-in-nod-scid-mice-deafened-with-kanamycin
#18
Simone Bettini, Valeria Franceschini, Laura Astolfi, Edi Simoni, Benedetta Mazzanti, Alessandro Martini, Roberto P Revoltella
BACKGROUND: Kanamycin, mainly used in the treatment of drug-resistant-tuberculosis, is known to cause irreversible hearing loss. Using the xeno-transplant model, we compared both in vitro and in vivo characteristics of human mesenchymal stromal cells (MSCs) derived from adult tissues, bone marrow (BM-MSCs) and adipose tissue (ADSCs). These tissues were selected for their availability, in vitro multipotency and regenerative potential in vivo in kanamycin-deafened nod-scid mice. METHODS: MSCs were isolated from informed donors and expanded ex vivo...
December 12, 2017: Cytotherapy
https://www.readbyqxmd.com/read/29244215/development-of-a-validated-liquid-chromatographic-method-for-quantification-of-sorafenib-tosylate-in-the-presence-of-stress-induced-degradation-products-and-in-biological-matrix-employing-analytical-quality-by-design-aqbd-approach
#19
Teenu Sharma, Rajneet Kaur Khurana, Atul Jain, O P Katare, Bhupinder Singh
The current research work envisages AQbD-enabled development of a simple, rapid, sensitive, specific, robust and cost-effective stability indicating reversed phase high performance liquid chromatographic (RP-HPLC) method for determining stress-induced forced degradation products of sorafenib tosylate (SFN). An Ishikawa fish bone diagram was constructed to embark upon analytical target profile (ATP) and critical analytical attributes (CAAs) i.e., peak area, theoretical plates, retention time (Rt ) and peak tailing...
December 15, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29239859/sensing-the-flow-beneath-the-fins
#20
Meghali Bora, Ajay Giri Prakash Kottapalli, Jianmin Miao, Michael Triantafyllou
Flow sensing, maneuverability, energy efficiency and vigilance of surroundings are the key factors that dictate the performance of marine animals. Be it swimming at high speeds, attack or escape maneuvers, sensing and survival hydrodynamics are a constant feature of life in the ocean. Fishes are capable of performing energy efficient maneuvers, including capturing energy from vortical structures in water. These impressive capabilities are made possible by the uncanny ability of fish to sense minute pressure and flow variations on their body...
December 14, 2017: Bioinspiration & Biomimetics
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