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https://www.readbyqxmd.com/read/28205543/ontogenetic-loops-in-habitat-use-highlight-the-importance-of-littoral-habitats-for-early-life-stages-of-oceanic-fishes-in-temperate-waters
#1
Patrick Polte, Paul Kotterba, Dorothee Moll, Lena von Nordheim
General concepts of larval fish ecology in temperate oceans predominantly associate dispersal and survival to exogenous mechanisms such as passive drift along ocean currents. However, for tropical reef fish larvae and species in inland freshwater systems behavioural aspects of habitat selection are evidently important components of dispersal. This study is focused on larval Atlantic herring (Clupea harengus) distribution in a Baltic Sea retention area, free of lunar tides and directed current regimes, considered as a natural mesocosm...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28198154/daily-and-seasonal-expression-profile-of-serum-melatonin-and-its-biosynthesizing-enzyme-genes-tph1-aanat1-aanat2-and-hiomt-in-pineal-organ-and-retina-a-study-under-natural-environmental-conditions-in-a-tropical-carp-catla-catla
#2
Chongtham Rajiv, Haobijam Sanjita Devi, Gopinath Mondal, Sijagurumayum Dharmajyoti Devi, Zeeshan Ahmad Khan, Thangal Yumnamcha, Rupjyoti Bharali, Asamanja Chattoraj
The tropical carp Catla catla is gaining importance for the studies of the impact of environmental changes on aquatic animals due to its surface dwelling habitat. To date, no information is available on the transcriptional profile of melatonin biosynthesizing enzyme genes in any tropical carp under either natural or artificial photothermal conditions in pineal and retina. The present study is an attempt to demonstrate the temporal pattern of expression of melatonin biosynthesizing enzyme genes, tryptophan hydroxylase 1 (tph1), arylalkylamine N-acetyltransferase (aanat1 and aanat2), and hydroxyindole-O-methyltransferase (hiomt) collectively and simultaneously in pineal organ and retina in tropical fish, C...
December 2016: Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
https://www.readbyqxmd.com/read/28188767/social-network-analysis-of-food-sharing-among-households-in-opisthorchiasis-endemic-villages-of-lawa-lake-thailand
#3
Waraphon Phimpraphai, Sirikachorn Tangkawattana, Piya Sereerak, Suwicha Kasemsuwan, Banchob Sripa
Consumption of raw fish is a well-documented risk factor for Opisthorchis viverrini infection. Sharing of food, especially raw fish recipes may influence the spread of disease through a community. Using social network analysis of an ego network, we investigated food sharing among households in an Opisthorchis-endemic area. Network centrality properties were used to explain the differences in O. viverrini transmission and control between villages with a low and high prevalence of infection. Information on demography and O...
February 7, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28176029/summarizing-us-wildlife-trade-with-an-eye-toward-assessing-the-risk-of-infectious-disease-introduction
#4
K M Smith, C Zambrana-Torrelio, A White, M Asmussen, C Machalaba, S Kennedy, K Lopez, T M Wolf, P Daszak, D A Travis, W B Karesh
The aim of this study was to characterize the role of the USA in the global exchange of wildlife and describe high volume trade with an eye toward prioritizing health risk assessment questions for further analysis. Here we summarize nearly 14 years (2000-2013) of the most comprehensive data available (USFWS LEMIS system), involving 11 billion individual specimens and an additional 977 million kilograms of wildlife. The majority of shipments contained mammals (27%), while the majority of specimens imported were shells (57%) and tropical fish (25%)...
February 7, 2017: EcoHealth
https://www.readbyqxmd.com/read/28166465/isolation-and-characterization-of-large-marine-bacteriophage-myoviridae-vhkm4-infecting-vibrio-harveyi
#5
Tamrin M Lal, Motohiko Sano, Julian Ransangan
The causative agent responsible for vibriosis in tropical fish aquaculture, Vibrio harveyi, has become a major bacterial pathogen. Studies suggest that this bacterium has developed resistance to antibiotics commonly used in aquaculture. In view of this situation and the requirement for the proposed postantibiotic era, bacteriophage therapy seems to be a promising control strategy for fish vibriosis. In this study, a lytic Vibrio phage VhKM4 belonging to a member of large, marine Myoviridae was successfully isolated...
March 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28126033/cultural-significance-of-termites-in-sub-saharan-africa
#6
Arnold van Huis
BACKGROUND: The number of termite species in the world is more than 2500, and Africa with more than 1000 species has the richest intercontinental diversity. The family Termitidae contains builders of great mounds up to 5 m high. Colonies are composed of casts: a queen, a king, soldiers and workers. Some species of termite cultivate specialised fungi to digest cellulose. Termites constitute 10% of all animal biomass in the tropics. The purpose of the study was to make an overview of how termites are utilized, perceived and experienced in daily life across sub-Saharan Africa...
January 26, 2017: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/28122146/are-fish-outside-their-usual-ranges-early-indicators-of-climate-driven-range-shifts
#7
Hannah E Fogarty, Michael T Burrows, Gretta T Pecl, Lucy M Robinson, Elvira S Poloczanska
Shifts in species ranges are a global phenomenon, well known to occur in response to a changing climate. New species arriving in an area may become pest species, modify ecosystem structure, or represent challenges or opportunities for fisheries and recreation. Early detection of range shifts and prompt implementation of any appropriate management strategies is therefore crucial. This study investigates whether "first sightings" of marine species outside their normal ranges could provide an early warning of impending climate-driven range shifts...
January 25, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28122040/is-there-a-relationship-between-fish-cannibalism-and-latitude-or-species-richness
#8
Larissa Strictar Pereira, Friedrich Wolfgang Keppeler, Angelo Antonio Agostinho, Kirk O Winemiller
Cannibalism has been commonly observed in fish from northern and alpine regions and less frequently reported for subtropical and tropical fish in more diverse communities. Assuming all else being equal, cannibalism should be more common in communities with lower species richness because the probability of encountering conspecific versus heterospecific prey would be higher. A global dataset was compiled to determine if cannibalism occurrence is associated with species richness and latitude. Cannibalism occurrence, local species richness and latitude were recorded for 4,100 populations of 2,314 teleost fish species...
2017: PloS One
https://www.readbyqxmd.com/read/28115722/reconciling-fisheries-catch-and-ocean-productivity
#9
Charles A Stock, Jasmin G John, Ryan R Rykaczewski, Rebecca G Asch, William W L Cheung, John P Dunne, Kevin D Friedland, Vicky W Y Lam, Jorge L Sarmiento, Reg A Watson
Photosynthesis fuels marine food webs, yet differences in fish catch across globally distributed marine ecosystems far exceed differences in net primary production (NPP). We consider the hypothesis that ecosystem-level variations in pelagic and benthic energy flows from phytoplankton to fish, trophic transfer efficiencies, and fishing effort can quantitatively reconcile this contrast in an energetically consistent manner. To test this hypothesis, we enlist global fish catch data that include previously neglected contributions from small-scale fisheries, a synthesis of global fishing effort, and plankton food web energy flux estimates from a prototype high-resolution global earth system model (ESM)...
January 23, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28111719/additive-effects-of-the-herbicide-glyphosate-and-elevated-temperature-on-the-branched-coral-acropora-formosa-in-nha-trang-vietnam
#10
C Amid, M Olstedt, J S Gunnarsson, H Le Lan, H Tran Thi Minh, P J Van den Brink, M Hellström, M Tedengren
The combined effects of the herbicide glyphosate and elevated temperature were studied on the tropical staghorn coral Acropora formosa, in Nha Trang bay, Vietnam. The corals were collected from two different reefs, one close to a polluted fish farm and one in a marine-protected area (MPA). In the laboratory, branches of the corals were exposed to the herbicide glyphosate at ambient (28 °C) and at 3 °C elevated water temperatures (31 °C). Effects of herbicide and elevated temperature were studied on coral bleaching using photography and digital image analysis (new colorimetric method developed here based on grayscale), chlorophyll a analysis, and symbiotic dinoflagellate (Symbiodinium, referred to as zooxanthellae) counts...
January 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28095487/dna-metabarcoding-of-amazonian-ichthyoplankton-swarms
#11
M E Maggia, Y Vigouroux, J F Renno, F Duponchelle, E Desmarais, J Nunez, C García-Dávila, F M Carvajal-Vallejos, E Paradis, J F Martin, C Mariac
Tropical rainforests harbor extraordinary biodiversity. The Amazon basin is thought to hold 30% of all river fish species in the world. Information about the ecology, reproduction, and recruitment of most species is still lacking, thus hampering fisheries management and successful conservation strategies. One of the key understudied issues in the study of population dynamics is recruitment. Fish larval ecology in tropical biomes is still in its infancy owing to identification difficulties. Molecular techniques are very promising tools for the identification of larvae at the species level...
2017: PloS One
https://www.readbyqxmd.com/read/28093608/spatiotemporal-drivers-of-energy-expenditure-in-a-coastal-marine-fish
#12
Jacob W Brownscombe, Steven J Cooke, Andy J Danylchuk
Animal behavior and energy expenditure often vary significantly across the landscape, and quantifying energy expenditure over space and time provides mechanistic insight into ecological dynamics. Yet, spatiotemporal variability in energy expenditure has rarely been explored in fully aquatic species such as fish. Our objective was to quantify spatially explicit energy expenditure for a tropical marine teleost fish, bonefish (Albula vulpes), to examine how bonefish energetics vary across landscape features and temporal factors...
January 16, 2017: Oecologia
https://www.readbyqxmd.com/read/28087534/mechanisms-of-horizontal-cell-to-cell-transfer-of-wolbachia-spp-in-drosophila-melanogaster
#13
Pamela M White, Jose E Pietri, Alain Debec, Shelbi Russell, Bhavin Patel, William Sullivan
: Wolbachia is an intracellular endosymbiont present in most arthropod and filarial nematode species. Transmission between hosts is primarily vertical, taking place exclusively through the female germline, though horizontal transmission has also been documented. Several studies indicate that Wolbachia is capable of transfer between somatic and germline cells during nematode development and in adult flies. However, the mechanisms underlying horizontal cell-to-cell transfer remain largely unexplored...
January 13, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28073553/the-effects-of-light-intensity-on-the-growth-of-japanese-gambierdiscus-spp-dinophyceae
#14
Takamichi Yoshimatsu, Chaoyu Tie, Haruo Yamaguchi, Hiroshi Funaki, Chiho Honma, Kouki Tanaka, Masao Adachi
Marine toxic dinoflagellates of the genus Gambierdiscus are the causative agents of ciguatera fish poisoning (CFP), a form of seafood poisoning that is widespread in tropical, subtropical and temperate regions worldwide. The distributions of Gambierdiscus australes, Gambierdiscus scabrosus and two phylotypes of Gambierdiscus spp. type 2 and type 3 have been reported for the waters surrounding the main island of Japan. To explore the bloom dynamics and the vertical distribution of these Japanese species and phylotypes of Gambierdiscus, the effects of light intensity on their growth were tested, using a photoirradiation-culture system...
December 2016: Harmful Algae
https://www.readbyqxmd.com/read/28065866/multilocus-molecular-phylogeny-of-the-ornamental-wood-eating-catfishes-siluriformes-loricariidae-panaqolus-and-panaque-reveals-undescribed-diversity-and-parapatric-clades
#15
Nathan K Lujan, Christian A Cramer, Raphael Covain, Sonia Fisch-Muller, Hernán López-Fernández
Approximately two-dozen species in three genera of the Neotropical suckermouth armored catfish family Loricariidae are the only described fishes known to specialize on diets consisting largely of wood. We conducted a molecular phylogenetic analysis of 10 described species and 14 undescribed species or morphotypes assigned to the wood-eating catfish genus Panaqolus, and four described species and three undescribed species or morphotypes assigned to the distantly related wood-eating catfish genus Panaque. Our analyses included individuals and species from both genera that are broadly distributed throughout tropical South America east of the Andes Mountains and 13 additional genera hypothesized to have also descended from the most recent common ancestor of Panaqolus and Panaque...
January 5, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28064319/-main-regulatory-element-mre-of-the-danio-rerio-%C3%AE-%C3%AE-globin-gene-domain-exerts-enhancer-activity-toward-the-promoters-of-the-embryonic-larval-and-adult-globin-genes
#16
A P Kovina, N V Petrova, S V Razin, O V Yarovaia
In warm-blooded vertebrates, the α- and β-globin genes are organized in domains of different types and are regulated in different fashion. In cold-blooded vertebrates and, in particular, the tropical fish Danio rerio, the α- and β-globin genes form two gene clusters. A major D. rerio globin gene cluster is in chromosome 3 and includes the α- and β-globin genes of embryonic-larval and adult types. The region upstream of the cluster contains c16orf35, harbors the main regulatory element (MRE) of the α-globin gene domain in warm-blooded vertebrates...
November 2016: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/28063698/nitrogen-isotopic-characterisation-of-macroalgae-blooms-from-different-sites-within-a-subtropical-bay-in-the-gulf-of-california
#17
Alejandra Piñón-Gimate, Noemi Espinosa-Andrade, Alberto Sánchez, Margarita Casas-Valdez
In La Paz Bay conspicuous macroalgal blooms of Ulva spp. are recurrent in the waterfront of the city; studies relate its growth to seasonality and nutrient enrichment but their relative influence is not known. We use the δ(15)N to discern amongst nitrogen sources at three sites with different substratum and anthropogenic activities. Ulva blooms were monitored monthly at San Juan de la Costa (SJC), Casa del Marino (CM) and El Tecolote (TE). Species presence varied between sites and months. At SJC Ulva displayed the highest signal of δ(15)N associated with fishing products and local mining wastewaters (19...
January 4, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28063102/quantitative-analyses-of-the-bacterial-microbiota-of-rearing-environment-tilapia-and-common-carp-cultured-in-earthen-ponds-and-inhibitory-activity-of-its-lactic-acid-bacteria-on-fish-spoilage-and-pathogenic-bacteria
#18
Pierre Marie Kaktcham, Jules-Bocamdé Temgoua, François Ngoufack Zambou, Gloria Diaz-Ruiz, Carmen Wacher, María de Lourdes Pérez-Chabela
The present study aimed to evaluate the bacterial load of water, Nile Tilapia and common Carp intestines from earthen ponds, isolate lactic acid bacteria (LAB) and assess their antimicrobial activity against fish spoilage and pathogenic bacteria. Following enumeration and isolation of microorganisms the antimicrobial activity of the LAB isolates was evaluated. Taxonomic identification of selected antagonistic LAB strains was assessed, followed by partial characterisation of their antimicrobial metabolites. Results showed that high counts (>4 log c...
February 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28056064/marine-reserve-targets-to-sustain-and-rebuild-unregulated-fisheries
#19
Nils C Krueck, Gabby N Ahmadia, Hugh P Possingham, Cynthia Riginos, Eric A Treml, Peter J Mumby
Overfishing threatens the sustainability of coastal marine biodiversity, especially in tropical developing countries. To counter this problem, about 200 governments worldwide have committed to protecting 10%-20% of national coastal marine areas. However, associated impacts on fisheries productivity are unclear and could weaken the food security of hundreds of millions of people who depend on diverse and largely unregulated fishing activities. Here, we present a systematic theoretic analysis of the ability of reserves to rebuild fisheries under such complex conditions, and we identify maximum reserve coverages for biodiversity conservation that do not impair long-term fisheries productivity...
January 2017: PLoS Biology
https://www.readbyqxmd.com/read/28043553/frequency-of-mycobacterial-infections-in-retailed-fish-in-karaj-an-iranian-perspective
#20
Atefeh Mobasher-Amini, Nader Mosavari, Mehdi Ghiami-Rad, Keyvan Tadayon
OBJECTIVE/BACKGROUND: Mycobacterium species comprise one of the most frequently-reported causative agents in granulomatous lesions of fish. Also, mycobacteria have been documented as fish-born zoonoses. Ornamental aquaria, commercial aquaculture, and wild fisheries therefore produce a potential risk of infection for humans through physical contact and consumption of fishes. A number of fish mycobacteriosis and fish-born zoonotic cases have been reported to date in Iran. METHODS: In order to examine the frequency of mycobacteria existence in fish supplied to the public in seafood retail outlets, whole fresh fish from cold water (n=50) and tropical (n=50) audible fish were obtained from five stores in Karaj, the central city of Alborz province...
December 2016: International Journal of Mycobacteriology
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