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https://www.readbyqxmd.com/read/28628614/lamphimerus-a-novel-lamp-assay-for-detecting-amphimerus-sp-dna-in-human-stool-samples
#1
William Cevallos, Pedro Fernández-Soto, Manuel Calvopiña, Cristina Fontecha-Cuenca, Hiromu Sugiyama, Megumi Sato, Julio López Abán, Belén Vicente, Antonio Muro
BACKGROUND: Amphimeriasis is a fish-borne disease caused by the liver fluke Amphimerus spp. that has recently been reported as endemic in the tropical Pacific side of Ecuador with a high prevalence in humans and domestic animals. The diagnosis is based on the stool examination to identify parasite eggs, but it lacks sensitivity. Additionally, the morphology of the eggs may be confounded with other liver and intestinal flukes. No immunological or molecular methods have been developed to date...
June 19, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28624873/short-communication-first-report-of-nematodes-parasitizing-the-four-eyed-fish-anableps-anableps-pisces-cyprinodontiformes
#2
Juliana Souza Ribeiro, Francisco Carlos Rodrigues de Oliveira, Nicole Brand Ederli
The genus Anableps is composed of species Anableps anableps, Anableps dowi, and Anableps microlepis. These fishes are tropical and usually live on the surface of brackish water, being popularly known as four-eyed-fishes due to the presence of prominent eyes and a pupil split horizontally. A. anableps and A. microlepis are considered as sister species that live in sympatry in South America. A. dowi, however, is restricted to the Pacific Ocean (Central America) and is considered the most primitive species of this genus...
June 17, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28622053/importance-of-sandy-bottoms-in-coral-reefs-to-the-oscillation-of-daily-rhythms-in-the-tropical-wrasse-halichoeres-trimaculatus
#3
Hitomi Ito-Takeuchi, Kai Takahashi, Selma Bouchekioua, Chihiro Yamauchi, Yuki Takeuchi, Sung-Pyo Hur, Young-Don Lee, Akihiro Takemura
Most wrasse species swim during the day and bury themselves in the sandy bottoms of shallow reefs at night. This study aimed to evaluate the importance of sandy bottoms to the day-active/night-inactive rhythmicity of the tropical wrasse Halichoeres trimaculatus. Actogram analysis revealed that fish were active during the photophase and inactive during the scotophase in aquariums with both sandy and bare bottoms. When fish were kept in aquariums with bare bottoms, rhythmicity was maintained under constant dark conditions (DD) but became obscured under constant light conditions (LL), suggesting that a day-active/night-inactive rhythmicity is regulated by the circadian system...
June 16, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28620218/bioinspired-nanocoatings-for-biofouling-prevention-by-photocatalytic-redox-reactions
#4
Priyanka Sathe, Karthik Laxman, Myo Tay Zar Myint, Sergey Dobretsov, Jutta Richter, Joydeep Dutta
Aquaculture is a billion dollar industry and biofouling of aquaculture installations has heavy economic penalties. The natural antifouling (AF) defence mechanism of some seaweed that inhibits biofouling by production of reactive oxygen species (ROS) inspired us to mimic this process by fabricating ZnO photocatalytic nanocoating. AF activity of fishing nets modified with ZnO nanocoating was compared with uncoated nets (control) and nets painted with copper-based AF paint. One month experiment in tropical waters showed that nanocoatings reduce abundances of microfouling organisms by 3-fold compared to the control and had higher antifouling performance over AF paint...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28616239/reflex-impairment-and-physiology-as-predictors-of-delayed-mortality-in-recreationally-caught-yellowtail-snapper-ocyurus-chrysurus
#5
Francesca C Forrestal, M Danielle McDonald, Georgianna Burress, David J Die
Yellowtail snapper (Ocyurus chrysurus) is an important part of the reef fish assemblage in the western, tropical Atlantic and is caught by both recreational and commercial fisheries in south Florida and the Bahamas. It is estimated that 80% of snapper caught within southeastern Florida waters are discarded due to minimum size restrictions. Neglecting to include information on delayed mortality of undersized fish has the potential for fishery managers to overestimate the abundance of smaller size classes and introduce bias into stock assessments...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28610158/a-new-i-schistura-i-from-the-salween-basin-in-western-yunnan-teleostei-nemacheilidae
#6
Marco Endruweit
River loaches of the genus Schistura McClelland 1838 are small, elongated, benthic fishes of the family Nemacheilidae. Species in the genus are part of a subsistence fishery in several Southeast Asian countries due to their tasty flesh and relative abundance in suitable habitats. Fluvial environments with gravelly bottoms in tropical and subtropical regions can be co-inhabited by several species of nemacheilid loaches. Kottelat (1990) reported up to six different species coexisting in Indochinese streams in some instances...
March 15, 2017: Zootaxa
https://www.readbyqxmd.com/read/28609892/reappraisal-of-i-synagrops-i-g%C3%A3-nther-1887-with-rehabilitation-and-revision-of-i-parascombrops-i-alcock-1889-including-description-of-seven-new-species-and-two-new-genera-perciformes-acropomatidae
#7
Werner W Schwarzhans, Artem M Prokofiev
An ongoing review of the fishes of the basal percoid family Acropomatidae has revealed that the genus Synagrops Günther, 1887 as it is currently understood is not a natural group. Species with a serrated pelvic-fin spine are here placed in the resurrected genus Parascombrops Alcock, 1889 (type-species: Parascombrops pellucidus Alcock, 1889), and the new, monospecific genus Caraibops n. gen. (type-species: Synagrops trispinosus Mochizuki & Sano, 1984). Parascombrops is unique amongst Acropomatidae in the combination of the presence of vacant 8th interneural space, a predorsal formula /0+0/0+2/ and an epaxialis attachment type 1...
May 4, 2017: Zootaxa
https://www.readbyqxmd.com/read/28602250/lsu-rdna-based-rflp-assays-for-the-routine-identification-of-gambierdiscus-species
#8
Yihua Lyu, Mindy L Richlen, Taylor R Sehein, Mireille Chinain, Masao Adachi, Tomohiro Nishimura, Yixiao Xu, Michael L Parsons, Tyler B Smith, Tianling Zheng, Donald M Anderson
The Gambierdiscus genus is a group of benthic dinoflagellates commonly associated with ciguatera fish poisoning (CFP), which is generally found in tropical or sub-tropical regions around the world. Morphologically similar species within the genus can vary in toxicity; however, species identifications are difficult or sometimes impossible using light microscopy. DNA sequencing of ribosomal RNA genes (rDNA) is thus often used to identify and describe Gambierdiscus species and ribotypes, but the expense and time can be prohibitive for routine culture screening and/or large-scale monitoring programs...
June 2017: Harmful Algae
https://www.readbyqxmd.com/read/28593715/can-animal-habitat-use-patterns-influence-their-vulnerability-to-extreme-climate-events-an-estuarine-sportfish-case-study
#9
Ross E Boucek, Michael R Heithaus, Rolando Santos, Philip Stevens, Jennifer S Rehage
Global climate forecasts predict changes in the frequency and intensity of extreme climate events (ECEs). The capacity for specific habitat patches within a landscape to modulate stressors from extreme climate events, and animal distribution throughout habitat matrices during events, could influence the degree of population level effects following the passage of ECEs. Here, we ask (i) does the intensity of stressors of an ECE vary across a landscape? And (ii) Do habitat use patterns of a mobile species influence their vulnerability to ECEs? Specifically, we measured how extreme cold spells might interact with temporal variability in habitat use to affect populations of a tropical, estuarine-dependent large-bodied fish Common Snook, within Everglades National Park estuaries (FL US)...
June 8, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28588550/the-role-of-peroxisome-proliferator-activated-receptor-gamma-pparg-in-adipogenesis-applying-knowledge-from-the-fish-aquaculture-industry-to-biomedical-research
#10
REVIEW
Rebecca Wafer, Panna Tandon, James E N Minchin
The tropical freshwater zebrafish has recently emerged as a valuable model organism for the study of adipose tissue biology and obesity-related disease. The strengths of the zebrafish model system are its wealth of genetic mutants, transgenic tools, and amenability to high-resolution imaging of cell dynamics within live animals. However, zebrafish adipose research is at a nascent stage and many gaps exist in our understanding of zebrafish adipose physiology and metabolism. By contrast, adipose research within other, closely related, teleost species has a rich and extensive history, owing to the economic importance of these fish as a food source...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28585038/power-analysis-as-a-tool-to-identify-statistically-informative-indicators-for-monitoring-coral-reef-disturbances
#11
Simon Van Wynsberge, Antoine Gilbert, Nicolas Guillemot, Tom Heintz, Laura Tremblay-Boyer
Extensive biological field surveys are costly and time consuming. To optimize sampling and ensure regular monitoring on the long term, identifying informative indicators of anthropogenic disturbances is a priority. In this study, we used 1800 candidate indicators by combining metrics measured from coral, fish, and macro-invertebrate assemblages surveyed from 2006 to 2012 in the vicinity of an ongoing mining project in the Voh-Koné-Pouembout lagoon, New Caledonia. We performed a power analysis to identify a subset of indicators which would best discriminate temporal changes due to a simulated chronic anthropogenic impact...
July 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28572998/mobulid-rays-feed-on-euphausiids-in-the-bohol-sea
#12
Christoph A Rohner, Katherine B Burgess, Joshua M Rambahiniarison, Joshua D Stewart, Alessandro Ponzo, Anthony J Richardson
Mobulid rays have a conservative life history and are caught in direct fisheries and as by-catch. Their subsequent vulnerability to overexploitation has recently been recognized, but fisheries management can be ineffective if it ignores habitat and prey preferences and other trophic interactions of the target species. Here, we assessed the feeding ecology of four mobulids (Manta birostris, Mobula tarapacana, M. japanica, M. thurstoni) in the Bohol Sea, Philippines, using stomach contents analysis of fisheries specimens landed between November and May in 2013-2015...
May 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28542538/new-evidence-indicates-the-presence-of-barracuda-sphyraenidae-and-supports-a-tropical-marine-environment-in-the-miocene-of-madagascar
#13
Michael D Gottfried, Karen E Samonds, Summer A Ostrowski, Tsiory Harimalala Andrianavalona, Tolotra Niaina Ramihangihajason
Recent exploration of Miocene-age deposits at Nosy Makamby, a small island ~50 km southwest of Mahajanga city in northwestern Madagascar, has led to the recovery of a large sample [82] of isolated barracuda teeth (Sphyraena sp.). in a tropical marine fauna that also includes diverse marine invertebrates, chondrichthyans, bony fishes, turtles, crocodylians, and sirenians. Characteristically for barracudas, the teeth are labiolingually flattened and fang-like with a broadly triangular and blade-like acuminate outline and sharply edged but unserrated cutting margins...
2017: PloS One
https://www.readbyqxmd.com/read/28542258/bycatch-in-the-maldivian-pole-and-line-tuna-fishery
#14
Kelsey I Miller, Ibrahim Nadheeh, A Riyaz Jauharee, R Charles Anderson, M Shiham Adam
Tropical tuna fisheries are among the largest worldwide, with some having significant bycatch issues. However, pole-and-line tuna fisheries are widely believed to have low bycatch rates, although these have rarely been quantified. The Maldives has an important pole-and-line fishery, targeting skipjack tuna (Katsuwonus pelamis). In the Maldives, 106 pole-and-line tuna fishing days were observed between August 2014 and November 2015. During 161 fishing events, tuna catches amounted to 147 t: 72% by weight was skipjack, 25% yellowfin tuna (Thunnus albacares) and 3% other tunas...
2017: PloS One
https://www.readbyqxmd.com/read/28535116/is-mannitol-the-treatment-of-choice-for-patients-with-ciguatera-fish-poisoning
#15
Michael E Mullins, Robert S Hoffman
CONTEXT: Ciguatera fish poisoning arises primarily from consumption of carnivorous reef fish caught in tropical and sub-tropical waters. Ciguatoxins, a class of tasteless, heat-stable, polycyclic toxins produced by dinoflagellates, accumulate through the food chain and concentrate in various carnivorous fish, such as groupers, barracudas, wrasses, amberjack, kingfishes, and eels. Characteristics of ciguatera fish poisoning include early nausea, vomiting, and diarrhea in the first one to two days post ingestion, followed by the appearance of sensory disturbances...
May 23, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28533562/accelerating-tropicalization-and-the-transformation-of-temperate-seagrass-meadows
#16
Glenn A Hyndes, Kenneth L Heck, Adriana Vergés, Euan S Harvey, Gary A Kendrick, Paul S Lavery, Kathryn McMahon, Robert J Orth, Alan Pearce, Mathew Vanderklift, Thomas Wernberg, Scott Whiting, Shaun Wilson
Climate-driven changes are altering production and functioning of biotic assemblages in terrestrial and aquatic environments. In temperate coastal waters, rising sea temperatures, warm water anomalies and poleward shifts in the distribution of tropical herbivores have had a detrimental effect on algal forests. We develop generalized scenarios of this form of tropicalization and its potential effects on the structure and functioning of globally significant and threatened seagrass ecosystems, through poleward shifts in tropical seagrasses and herbivores...
November 1, 2016: Bioscience
https://www.readbyqxmd.com/read/28529176/impairment-of-antioxidant-mechanisms-in-japanese-medaka-oryzias-latipes-by-acute-exposure-to-aluminum
#17
Wilson F Ramírez-Duarte, Tomofumi Kurobe, Swee J Teh
Increasing aluminum (Al) concentrations in aquatic habitats as a result of anthropogenic acidification and industrialization is a global issue. Moreover, in extensive areas of the humid tropics and subtropics, high Al concentrations in freshwater are observed because of both naturally low pH and high Al concentrations in soil. Al increases production of reactive oxygen species and enhances oxidative damage in mammals. However, no studies have examined the effect of environmentally relevant concentrations of Al at low pH on oxidative stress in fish...
May 18, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/28526119/effects-of-temperature-salinity-and-composition-of-the-dinoflagellate-assemblage-on-the-growth-of-gambierdiscus-carpenteri-isolated-from-the-great-barrier-reef
#18
Leanne Sparrow, Paolo Momigliano, Garry R Russ, Kirsten Heimann
Increases in reported incidence of ciguatera fish poisoning (hereafter ciguatera) have been linked to warmer sea temperatures that are known to trigger coral bleaching events. The drivers that trigger blooms of ciguatera-causing dinoflagellates on the Great Barrier Reef (GBR) are poorly understood. This study investigated the effects of increased temperatures and lowered salinities, often associated with environmental disturbance events, on the population growth of two strains of the potentially ciguatera-causing dinoflagellate, Gambierdiscus carpenteri (NQAIF116 and NQAIF380)...
May 2017: Harmful Algae
https://www.readbyqxmd.com/read/28515206/widespread-ecomorphological-convergence-in-multiple-fish-families-spanning-the-marine-freshwater-interface
#19
Aaron M Davis, Ricardo Betancur-R
The theoretical definition and quantification of convergence is an increasingly topical focus in evolutionary research, with particular growing interest on study scales spanning deep phylogenetic divergences and broad geographical areas. While much progress has recently been made in understanding the role of convergence in driving terrestrial (e.g. anole lizards) and aquatic (e.g. cichlids) radiations, little is known about its macroevolutionary effects across environmental gradients. This study uses a suite of recently developed comparative approaches integrating diverse aspects of morphology, dietary data, habitat affiliation and phylogeny to assess convergence across several well-known tropical-temperate fish families in the percomorph suborder Terapontoidei, a clade with considerable phenotypic and ecological diversity radiating in both marine and freshwater environments...
May 17, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28514630/speciation-and-the-latitudinal-diversity-gradient-insights-from-the-global-distribution-of-endemic-fish
#20
Patrick J Hanly, Gary G Mittelbach, Douglas W Schemske
The nearly universal pattern that species richness increases from the poles to the equator (the latitudinal diversity gradient [LDG]) has been of intense interest since its discovery by early natural-history explorers. Among the many hypotheses proposed to explain the LDG, latitudinal variation in (1) productivity, (2) time and area available for diversification, and (3) speciation and/or extinction rates have recently received the most attention. Because tropical regions are older and were formerly more widespread, these factors are often intertwined, hampering efforts to distinguish their relative contributions to the LDG...
June 2017: American Naturalist
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