Escapement ≈ Escapement
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Winter distribution and abundance of humpback whales (Megaptera novaeangliae) off Northeastern Brazil Open
The Brazilian coast is recognised as a Southern Hemisphere humpback whale (Megaptera novaeangliae) wintering ground (IWC breeding stock ‘A’). The northeastern coast of Brazil was an important whaling ground in the 20th century. Shipboard s…
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River ecosystem resilience to extreme flood events Open
Floods have a major influence in structuring river ecosystems. Considering projected increases in high‐magnitude rainfall events with climate change, major flooding events are expected to increase in many regions of the world. However, the…
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Effect of pingers on harbour porpoise (Phocoena phocoena) bycatch in the US Northeast gillnet fishery Open
Harbour porpoise (Phocoena phocoena) bycatch in the US Northeast gillnet fishery is managed under the Harbour Porpoise Take Reduction Plan (HPTRP), which was implemented on 1 January 1999. The HPTRP divides this fishery into management are…
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Watershed‐scale climate influences productivity of Chinook salmon populations across southcentral Alaska Open
The ecosystems supporting Pacific salmon ( Oncorhynchus spp.) are changing rapidly as a result of climate change and habitat alteration. Understanding how—and how consistently—salmon populations respond to changes at regional and watershed…
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Measuring the net biological impact of fisheries enhancement: pink salmon hatcheries can increase yield, but with apparent costs to wild populations Open
Hatchery production of juvenile fish for release into the wild has been practiced for well over a century in an effort to increase the number of salmon available to harvest. In this study, we evaluate the net impact of the largest such pro…
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Direct and indirect impacts of pumping station operation on downstream migration of critically endangered European eel Open
Downstream passage of European eel Anguilla anguilla (L.) in catchments with pump(s) for water level management is a major concern. Catchment‐wide acoustic telemetry revealed silver eels quickly migrated downstream through unobstructed rea…
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Deep-sea crustacean trawling fisheries in Portugal: quantification of effort and assessment of landings per unit effort using a Vessel Monitoring System (VMS) Open
Mapping and quantifying bottom trawling fishing pressure on the seafloor is pivotal to understand its effects on deep-sea benthic habitats. Using data from the Vessel Monitoring System of crustacean trawlers along the Portuguese margin, we…
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A Bayesian assessment of the conservation status of humpback whales (Megaptera novaeangliae) in the western South Atlantic Ocean Open
The population of humpback whales (Megaptera novaeangliae) wintering off the eastern coast of South America is referred to by the International Whaling Commission as ‘Breeding Stock A’ (BSA). This population was heavily exploited in 20th c…
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Ancient fish weir technology for modern stewardship: lessons from community-based salmon monitoring Open
Introduction: The UN Declaration on the Rights of Indigenous Peoples states that indigenous people have a fundamental right to contribute to the management of the resources that support their livelihoods. Salmon are vital to the economy an…
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Parentage-based tagging improves escapement estimates for ESA-listed adult Chinook salmon and steelhead in the Snake River basin Open
Parentage-based tagging (PBT) is a nonlethal, genetic tagging method that has been successfully applied in hatchery-supplemented populations to manage hatchery brood stock and monitor hatchery harvest and straying rates. We show that PBT c…
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Harvest control rules used in US federal fisheries management and implications for climate resilience Open
Climate change is altering the productivity of marine fisheries and challenging the effectiveness of historical fisheries management. Harvest control rules, which describe the process for determining catch limits in fisheries, represent on…
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Whole-gear efficiency of a benthic survey trawl for flatfish Open
Whole-gear efficiency (the proportion of fish passing between the otter doors of a bottom trawl that are subsequently captured) was estimated from data collected during experiments to measure the herding efficiency of bridles and doors, th…
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Behaviour of endangered European eels in proximity to a dam during downstream migration: Novel insights using high accuracy 3D acoustic telemetry Open
River infrastructures such as weirs, hydropower stations or water reservoirs represent obstructions to migration for diadromous fish. Knowledge of accurate behaviour of fish in front of such structures is required to protect migrants from …
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Migration behaviour and escapement of European silver eels from a large lake and wetland system subject to water level management (Grand‐Lieu Lake, France): New insights from regulated acoustic telemetry data Open
Current knowledge about the downstream migration of sexually mature European eels ( Anguilla anguilla ) remains incomplete, particularly in still water habitats such as lakes and wetlands subject to water level management. However, for the…
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Long-term variation in numbers and biomass of silver eels being produced in two European river systems Open
The European eel (Anguilla anguilla) population has been in decline at least since the 1960s and reliable regional information, particularly on the spawner production and escapement (i.e. the silver eel life stage), is a requirement of the…
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Trends in Chinook salmon spawner abundance and total run size highlight linkages between life history, geography and decline Open
Chinook salmon ( Oncorhynchus tshawytscha , Salmonidae) are foundational to social‐ecological systems of the Northeast Pacific Rim and exhibit a rich diversity of life histories including in their adult migration timing, age at critical li…
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Environmental <span>DNA</span> metabarcoding provides enhanced detection of the European eel <span> <i>Anguilla anguilla</i> </span> and fish community structure in pumped river catchments Open
The European eel Anguilla anguilla (eel hereafter) is critically endangered and has a catadromous life cycle, which means adult eels that live in pumped catchments must pass through pumps during their downstream spawning migration. Policy …
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Mortality of silver eels migrating through different types of hydropower turbines in Lithuania Open
Hydropower plants (HPP) are considered to be one of the major threats to the survival of European eels when they migrate downstream along inland water bodies during the early part of their annual journey to the spawning area in the Sargass…
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Behavioural responses of eel (<i>Anguilla anguilla</i>) approaching a large pumping station with trash rack using an acoustic camera (DIDSON) Open
European eel, Anguilla anguilla L., migrating to the sea encounter many man‐made structures that can hamper and delay migration or induce mortality. Studying small‐scale behavioural movements in front of these man‐made structures could pro…
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Modeling composite effects of marine and freshwater processes on migratory species Open
Life histories of migratory species such as anadromous fishes make them particularly susceptible to composite effects of processes experienced across distinct habitats and life stages. Therefore, their population dynamics are difficult to …
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A demographic model for the conservation and management of the European eel: an application to a Mediterranean coastal lagoon Open
We present a general size- and age-structured demographic model of the continental phase of catadromous eels’ life cycle, allowing for the incorporation of (i) fluctuations of juvenile recruitment, (ii) density-dependent settlement and sex…
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Co-existence in practice: a collaborative study of the effects of the Westermost Rough offshore wind development on the size distribution and catch rates of a commercially important lobster (<i>Homarus gammarus</i>) population Open
The global expansion of offshore windfarms (OWF), whilst seen as a tool to combat climate change, can often be of concern to fishing communities already challenged by spatial restrictions. Static gear fisheries, due to their strong fidelit…
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Escapement mechanisms: Efficient free energy transduction by reciprocally‐coupled gating Open
Conversion of the free energy of NTP hydrolysis efficiently into mechanical work and/or information by transducing enzymes sustains living systems far from equilibrium, and so has been of interest for many decades. Detailed molecular mecha…
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LIMITS AND OPERATIONAL EVALUATION OF THE SPAWNERS ESCAPEMENT TO THE SPAWNING GROUNDS AS TOOLS FOR PROSPECTIVE AND SHORT-TERM MANAGEMENT OF THE PACIFIC SALMON STOCKS IN THE RIVERS OF THE FAR-EASTERN FISHERIES BASIN Open
The major aspects of density regulation of the pacific salmons spawning are analyzed. Uncertainty of the ecological parameters considered traditionally as indicators of the salmons reproduction efficiency is discussed. If the method of the…
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Artificial light improves escapement of fish from a trawl net Open
The elimination of unwanted catch in mixed species fisheries is technically challenging given the complexity of fish behaviour within nets. Most approaches to date have employed technologies that modify the nets themselves or use physical …
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A Comparison of Grass Carp Population Characteristics Upstream and Downstream of Lock and Dam 19 of the Upper Mississippi River Open
Grass Carp Ctenopharyngodon idella have been intentionally stocked for aquatic vegetation control across the Midwestern United States for several decades. During the 1970s, escapement of Grass Carp into the Missouri River facilitated their…
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Fishery Stock Assessments in the Min River Estuary and Its Adjacent Waters in Southern China Using the Length-Based Bayesian Estimation (LBB) Method Open
The Min River Estuary and its adjacent waters, connecting to the East China Sea, is one of the most important fishing grounds in Fujian Province, southern China; however, stock assessments have not yet been conducted. In the present study,…
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Using the photo- and video records for assessment of pacific salmon escapement on migration routes and spawning grounds: some of methodical approaches Open
ТИХООКЕАНСКИЕ ЛОСОСИ, УЧЕТ ЧИСЛЕННОСТИ, МЕТОДЫ, ФОТОСЪЕМКА, НЕРЕСТИЛИЩА, КАМЧАТКА, ОЗЕРО НАЧИКИНСКОЕВ связи с уменьшением объема и детальности авиаучетов на Камчатке, была возобновлена фотосъемка нерестилищ в виде двух модификаций -наземно…
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Does What Goes up Also Come Down? Using a Recruitment Model to Balance Alewife Nutrient Import and Export Open
Migrating adult Alewives Alosa pseudoharengus are a source of marine-derived nutrients on the East Coast of North America, importing nitrogen and phosphorus into freshwater habitats. Juvenile migrants subsequently transport freshwater-deri…
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Quantifying exchanges of Allis shads between river catchments by combining otolith microchemistry and abundance indices in a Bayesian model Open
[Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE [ADD1_IRSTEA]Systèmes aquatiques soumis à des pressions multiplescited By 0