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https://www.readbyqxmd.com/read/28527377/fishing-for-leadership-the-role-diversification-plays-in-facilitating-change-agents
#1
Joshua S Stoll
Leadership is often viewed as being critical to successful natural resource management. This research focuses on a set of leaders identified through a social network analysis of fishers in a rural coastal region. Leaders' connections to different fisheries are evaluated, and these actors are found to be significantly more diversified than other fishers in the area. Drawing on theory related to institutional entrepreneurship and a series of in-depth interviews with these actors, this paper puts forward several hypotheses to explain how diverse social-ecological connections facilitate leadership...
May 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28527138/application-of-hyper-branched-rolling-circle-amplification-hrca-and-hrca-based-strip-test-for-the-detection-of-chattonella-marina
#2
Xiaoli Nie, Chunyun Zhang, Yuanyuan Wang, Changlu Guo, Jin Zhou, Guofu Chen
Harmful algal blooms (HABs) are global threats to marine ecosystems, fisheries, and human health. Therefore, developing effective and accurate methods for identifying causative algae and monitoring seawater quality is urgent. However, traditional, microscopy-based methods are complex, inaccurate, and time-consuming. Here, we present a novel method for effective and sensitive detection of Chattonella marina using hyper-branched rolling circle amplification (HRCA) and HRCA-based strip test (HBST). The large subunit (LSU) ribosomal DNA (rDNA) D1-D2 region of C...
May 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28524851/extended-fisheries-recovery-timelines-in-a-changing-environment
#3
Gregory L Britten, Michael Dowd, Lisa Kanary, Boris Worm
Rebuilding depleted fish stocks is an international policy goal and a 2020 Aichi target under the Convention on Biological Diversity. However, stock productivity may shift with future climate change, with unknown consequences for sustainable harvesting, biomass targets and recovery timelines. Here we develop a stochastic modelling framework to characterize variability in the intrinsic productivity parameter (r) and carrying capacity (K) for 276 global fish stocks worldwide. We use models of dynamic stock productivity fitted via Bayesian inference to forecast rebuilding timelines for depleted stocks...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28523376/accounting-for-uncertainty-and-time-lags-in-equivalency-calculations-for-offsetting-in-aquatic-resources-management-programs
#4
Michael J Bradford
Biodiversity offset programs attempt to minimize unavoidable environmental impacts of anthropogenic activities by requiring offsetting measures in sufficient quantity to counterbalance losses due to the activity. Multipliers, or offsetting ratios, have been used to increase the amount of offsets to account for uncertainty but those ratios have generally been derived from theoretical or ad-hoc considerations. I analyzed uncertainty in the offsetting process in the context of offsetting for impacts to freshwater fisheries productivity...
May 18, 2017: Environmental Management
https://www.readbyqxmd.com/read/28521936/trace-element-concentrations-in-the-apex-predator-swordfish-xiphias-gladius-from-a-mediterranean-fishery-and-risk-assessment-for-consumers
#5
S Gobert, V Pasqualini, J Dijoux, P Lejeune, E D H Durieux, M Marengo
Swordfish (Xiphias gladius L., 1758) is an apex predator, highly migratory meso-pelagic fish widely distributed in the Atlantic Ocean and Mediterranean. As top predators, this fish may be the end reservoir of the bioaccumulation of trace elements in a food chain because they occupy higher trophic levels and are an important food source, causing them to be potentially hazardous to consume. This study aims to investigate the concentration of 18 trace elements of Swordfish, caught in the Mediterranean Sea and to discuss human exposure risks...
May 15, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28521168/ecotoxicity-testing-and-environmental-risk-assessment-of-iron-nanomaterials-for-sub-surface-remediation-recommendations-from-the-fp7-project-nanorem
#6
Rune Hjorth, Claire Coutris, Nhung H A Nguyen, Alena Sevcu, Juliàn Alberto Gallego-Urrea, Anders Baun, Erik J Joner
Nanoremediation with iron (Fe) nanomaterials opens new doors for treating contaminated soil and groundwater, but is also accompanied by new potential risks as large quantities of engineered nanomaterials are introduced into the environment. In this study, we have assessed the ecotoxicity of four engineered Fe nanomaterials, specifically, Nano-Goethite, Trap-Ox Fe-zeolites, Carbo-Iron(®) and FerMEG12, developed within the European FP7 project NanoRem for sub-surface remediation towards a test battery consisting of eight ecotoxicity tests on bacteria (V...
May 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28515870/behavioral-responses-to-encounter-of-fishing-boats-in-wandering-albatrosses
#7
Julien Collet, Samantha C Patrick, Henri Weimerskirch
Animals are attracted to human food subsidies worldwide. The behavioral response of individuals to these resources is rarely described in detail, beyond chances of encounters. Seabirds for instance scavenge in large numbers at fishing boats, triggering crucial conservation issues, but how the response to boats varies across encounters is poorly known. Here we examine the behavioral response of wandering albatrosses (Diomedea exulans), equipped with GPS tags, to longline fishing boats operating near their colony for which we had access to vessel monitoring system data...
May 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28503374/sooty-tern-onychoprion-fuscatus-survival-oil-spills-shrimp-fisheries-and-hurricanes
#8
Ryan M Huang, Oron L Bass, Stuart L Pimm
Migratory seabirds face threats from climate change and a variety of anthropogenic disturbances. Although most seabird research has focused on the ecology of individuals at the colony, technological advances now allow researchers to track seabird movements at sea and during migration. We combined telemetry data on Onychoprion fuscatus (sooty terns) with a long-term capture-mark-recapture dataset from the Dry Tortugas National Park to map the movements at sea for this species, calculate estimates of mortality, and investigate the impact of hurricanes on a migratory seabird...
2017: PeerJ
https://www.readbyqxmd.com/read/28500794/rapid-broad-scale-gene-expression-evolution-in-experimentally-harvested-fish-populations
#9
Silva Uusi-Heikkilä, Tiina Sävilammi, Erica Leder, Robert Arlinghaus, Craig R Primmer
Gene expression changes potentially play an important role in adaptive evolution under human-induced selection pressures but this has been challenging to demonstrate in natural populations. Fishing exhibits strong selection pressure against large body size, thus potentially inducing evolutionary changes in life-history and other traits that may be slowly reversible once fishing ceases. However, there is a lack of convincing examples regarding the speed and magnitude of fisheries-induced evolution and thus the relevant underlying molecular-level effects remain elusive...
May 13, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28495709/china-cracks-down-on-coastal-fisheries
#10
Dennis Normile
No abstract text is available yet for this article.
May 12, 2017: Science
https://www.readbyqxmd.com/read/28492174/hematodinium-spp-infections-in-wild-and-cultured-populations-of-marine-crustaceans-along-the-coast-of-china
#11
Jin-Feng Wang, Meng Li, Jie Xiao, Wen-Jun Xu, Cai-Wen Li
The parasitic dinoflagellate Hematodinium spp. infects a broad range of marine crustaceans. Its epidemics have impacted wild populations of various commercial fishery species around the world and the sustainability of mariculture in China. To study the epidemiology of Hematodinium spp. in marine crustaceans along the coast of China, we conducted a broad survey of wild and cultured stocks of major crustacean species in 2013 to 2015. Hematodinium sp. infections were identified in wild stocks of Portunus trituberculatus from Huludao, Laizhou, Qingdao, Yangtze River Estuary and Zhoushan, and Scylla paramamosain from Shantou; and cultured stocks of Portunus trituberculatus and Penaeus monodon from a polyculture pond in Qingdao...
May 11, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28492173/disease-ecology-of-hematodinium-perezi-in-a-high-salinity-estuary-investigating-seasonal-trends-in-environmental-detection
#12
K A Lycett, J S Pitula
The blue crab Callinectes sapidus has seen a general decline in population levels. One factor influencing mortality is infections by Hematodinium perezi, a dinoflagellate parasite. A 2 yr study was conducted in 2014 and 2015 to monitor H. perezi DNA within the Maryland (USA) coastal bays, comparing seasonal cycles in the abundance of parasite DNA in environmental samples to parasite presence in host blue crabs. A late summer to early fall peak in H. perezi infections in blue crabs was observed, consistent with previous work...
May 11, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28489943/reduced-snps-panels-for-assigning-atlantic-albacore-and-bay-of-biscay-anchovy-individuals-to-their-geographic-origin-toward-sustainable-fisheries-management
#13
Iratxe Montes, Urtzi Laconcha, Mikel Iriondo, Carmen Manzano, Haritz Arrizabalaga, Andone Estonba
There is an increasing trend on adding detailed description of the origin of seafood products driven by a general interest on the implementation of sustainable fishery management plans for the conservation of marine ecosystems. Atlantic albacore ("Bonito del Norte con Eusko Label") and Bay of Biscay anchovy ("Anchoa del Cantábrico") are two commercially important fish populations with high economical value and vulnerable to commercial frauds. This fact together with the overexploited situation of these two populations makes necessary to develop a tool to identify individual origin and to detect commercial fraud...
May 10, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28489925/do-the-brazilian-sardine-commercial-landings-respond-to-local-ocean-circulation
#14
Mainara B Gouveia, Douglas F M Gherardi, Carlos A D Lentini, Daniela F Dias, Paula C Campos
It has been reported that sea surface temperature (SST) anomalies, flow intensity and mesoscale ocean processes, all affect sardine production, both in eastern and western boundary current systems. Here we tested the hypothesis whether extreme high and low commercial landings of the Brazilian sardine fisheries in the South Brazil Bight (SBB) are sensitive to different oceanic conditions. An ocean model (ROMS) and an individual based model (Ichthyop) were used to assess the relationship between oceanic conditions during the spawning season and commercial landings of the Brazilian sardine one year later...
2017: PloS One
https://www.readbyqxmd.com/read/28489201/water-temperature-body-mass-and-fasting-heat-production-of-pacu-piaractus-mesopotamicus
#15
Fredy A A Aguilar, Thaline M P DA Cruz, Gerson B Mourão, José Eurico P Cyrino
Knowledge on fasting heat production (HEf) of fish is key to develop bioenergetics models thus improving feeding management of farmed species. The core of knowledge on HEf of farmed, neotropical fish is scarce. This study assessed the effect of body mass and water temperature on standard metabolism and fasting heat production of pacu, Piaractus mesopotamicus, an omnivore, Neotropical fresh water characin important for farming and fisheries industries all through South American continent. An automated, intermittent flow respirometry system was used to measure standard metabolic rate (SMR) of pacu (17 - 1,050 g) at five water temperatures: 19, 23, 26, 29 and 33 °C...
April 27, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28489197/population-dynamics-of-rimapenaeus-constrictus-stimpson-1874-penaeoidea-on-the-southeastern-brazilian-coast-implications-for-shrimp-fishing-management-from-a-5-year-study-on-a-bycatch-species
#16
Ana Elisa B Lopes, Raphael C Grabowski, Joyce R Garcia, Adilson Fransozo, Rogério C DA Costa, Kátia A N Hiroki, Antonio L Castilho
This is the first study to evaluate in broad spatiotemporal scales the growth parameters and population structure of Rimapenaeus constrictus, a barely damaged species composing the bycatch from shrimp fishing in the Western Atlantic. The abundance and size-class frequency distribution, growth, longevity and sex ratio were evaluated from monthly samples obtained in the northern littoral of São Paulo state from Jan/1998 to Jun/2003. We measured 5,812 individuals in which the sex ratio was skewed toward females; this was more evident in size classes greater than 10 mm in CL (carapace length) (binomial test, p<0...
May 2, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28487161/resilience-of-benthic-deep-sea-fauna-to-mining-activities
#17
REVIEW
Sabine Gollner, Stefanie Kaiser, Lena Menzel, Daniel O B Jones, Alastair Brown, Nelia C Mestre, Dick van Oevelen, Lenaick Menot, Ana Colaço, Miquel Canals, Daphne Cuvelier, Jennifer M Durden, Andrey Gebruk, Great A Egho, Matthias Haeckel, Yann Marcon, Lisa Mevenkamp, Telmo Morato, Christopher K Pham, Autun Purser, Anna Sanchez-Vidal, Ann Vanreusel, Annemiek Vink, Pedro Martinez Arbizu
With increasing demand for mineral resources, extraction of polymetallic sulphides at hydrothermal vents, cobalt-rich ferromanganese crusts at seamounts, and polymetallic nodules on abyssal plains may be imminent. Here, we shortly introduce ecosystem characteristics of mining areas, report on recent mining developments, and identify potential stress and disturbances created by mining. We analyze species' potential resistance to future mining and perform meta-analyses on population density and diversity recovery after disturbances most similar to mining: volcanic eruptions at vents, fisheries on seamounts, and experiments that mimic nodule mining on abyssal plains...
April 13, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28487057/investigation-of-plastic-debris-ingestion-by-four-species-of-sea-turtles-collected-as-bycatch-in-pelagic-pacific-longline-fisheries
#18
Katharine E Clukey, Christopher A Lepczyk, George H Balazs, Thierry M Work, Jennifer M Lynch
Ingestion of marine debris is an established threat to sea turtles. The amount, type, color and location of ingested plastics in the gastrointestinal tracts of 55 sea turtles from Pacific longline fisheries from 2012 to 2016 were quantified, and compared across species, turtle length, body condition, sex, capture location, season and year. Six approaches for quantifying amounts of ingested plastic strongly correlated with one another and included: number of pieces, mass, volume and surface area of plastics, ratio of plastic mass to body mass, and percentage of the mass of gut contents consisting of plastic...
May 6, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28486509/combining-participatory-and-socioeconomic-approaches-to-map-fishing-effort-in-small-scale-fisheries
#19
Lauric Thiault, Antoine Collin, Frédérique Chlous, Stefan Gelcich, Joachim Claudet
Mapping the spatial allocation of fishing effort while including key stakeholders in the decision making process is essential for effective fisheries management but is difficult to implement in complex small-scale fisheries that are diffuse, informal and multifaceted. Here we present a standardized but flexible approach that combines participatory mapping approaches (fishers' spatial preference for fishing grounds, or fishing suitability) with socioeconomic approaches (spatial extrapolation of social surrogates, or fishing capacity) to generate a comprehensive map of predicted fishing effort...
2017: PloS One
https://www.readbyqxmd.com/read/28484828/satellite-remote-sensing-for-coastal-management-a-review-of-successful-applications
#20
Matthew J McCarthy, Kaitlyn E Colna, Mahmoud M El-Mezayen, Abdiel E Laureano-Rosario, Pablo Méndez-Lázaro, Daniel B Otis, Gerardo Toro-Farmer, Maria Vega-Rodriguez, Frank E Muller-Karger
Management of coastal and marine natural resources presents a number of challenges as a growing global population and a changing climate require us to find better strategies to conserve the resources on which our health, economy, and overall well-being depend. To evaluate the status and trends in changing coastal resources over larger areas, managers in government agencies and private stakeholders around the world have increasingly turned to remote sensing technologies. A surge in collaborative and innovative efforts between resource managers, academic researchers, and industry partners is becoming increasingly vital to keep pace with evolving changes of our natural resources...
May 8, 2017: Environmental Management
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