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Niche overlap among anglers, fishers and cormorants and their removals of fish biomass: A case from brackish lagoon ecosystems in the southern Baltic Sea Fish. Res. (IF 2.147) Pub Date : 2021-03-03 Robert Arlinghaus; Jorrit Lucas; Marc Simon Weltersbach; Dieter Kömle; Helmut M. Winkler; Carsten Riepe; Carsten Kühn; Harry V. Strehlow
We used time series, diet studies and angler surveys to examine the potential for conflict in brackish lagoon fisheries of the southern Baltic Sea in Germany, specifically focusing on interactions among commercial and recreational fisheries as well as fisheries and cormorants (Phalacrocorax carbo sinensis). For the time period between 2011 and 2015, commercial fisheries were responsible for the largest
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Insights into the ecology of sea turtles and the fisheries of eastern Guajira from the traditional knowledge of fishermen Fish. Res. (IF 2.147) Pub Date : 2021-03-04 Catalina Vásquez-Carrillo; Manuela Peláez-Ossa
The productive waters of the Guajira peninsula (Colombia) support unique marine ecosystems and fisheries with high levels of biodiversity upon which Wayuu indigenous communities rely for subsistence. However, climate change has affected local people’s livelihoods and dependence on fisheries has increased as a result in this area. Socio-ecological knowledge to understand the fisheries and the ecosystems
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Evaluation of impacts of bottom fishing on demersal habitats: A case study off the Pacific coast of north-eastern Japan Fish. Res. (IF 2.147) Pub Date : 2021-03-04 Aigo Takeshige; Mai Miyamoto; Yoji Narimatsu; Shiroh Yonezaki; Masashi Kiyota
Physical disturbance of the seafloor induced by bottom trawling is of increasing concern from the viewpoints of ecosystem conservation and sustainable fishery. We developed a method for evaluating the impacts of several kinds of trawl gears on the different seafloor habitats using bathymetry and sediment data and scientific survey data off the Pacific coast of north-eastern Japan. Ten types of habitats
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A rebuilding time model for Pacific salmon Fish. Res. (IF 2.147) Pub Date : 2021-03-03 Michael R. O’Farrell; William H. Satterthwaite
We describe a new model developed for the purpose of projecting rebuilding periods for overfished Pacific salmon stocks as defined by the Pacific Fishery Management Council. The model has relatively low data requirements as it relies on past estimates of abundance to project future abundance, accounting for positive lag-1 autocorrelation if there is evidence of its existence. Replicate applications
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Tunas off northwest Africa: The epipelagic diet of The Bigeye and Skipjack tunas Fish. Res. (IF 2.147) Pub Date : 2021-03-03 Joana Romero; Paulo Catry; Margarida Hermida; Verónica Neves; Bárbara Cavaleiro; Lídia Gouveia; José Pedro Granadeiro
Tunas are among the most exploited top predators worldwide, with negative impacts on some of their stocks. Changes in their population abundance can impact marine food-webs and have the potential to alter entire ecosystems. To better understand the impacts of the exploitation of tuna stocks in the most critical habitats, basic knowledge on the diet of these species in each region is required. Here
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Diving into fisher experience: Do new entrants and fleet turnover depress catch rates in abalone (Haliotis laevigata and H. rubra) fisheries Fish. Res. (IF 2.147) Pub Date : 2021-03-02 Katherine Heldt; Ben Stobart; Stephen Mayfield
A fisher’s experience may provide greater efficiency and enhanced catches through time. Compared to new entrants to the fishery, experienced fishers often have developed tactics: the advantage of knowing ‘the best’ fishing grounds, having established efficient fishing practices, and developing relationships and trust within their fishing community. The influence of experience on catch rates, a key
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Comparison of proxies for fish stock. A Monte Carlo analysis Fish. Res. (IF 2.147) Pub Date : 2021-02-27 Antonio M. Alvarez
In fisheries, it is quite common to include a measure of fish stock as an argument of fishing production functions. Given that this information is not available in many cases, researchers use stock proxies. We show that catch-per-unit-effort, a common proxy based on the average catch of boats in a given period, introduces strong parametric restrictions when included as an explanatory variable in a
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How lure prevalence, survival rate and maturity status affect catchability in cuttlefish trap fishery Fish. Res. (IF 2.147) Pub Date : 2021-02-26 Konstantinos Ganias; Irini-Fotini Kompogianni; Georgios Christidis
Trap fishing is considered a low impact and fuel-efficient capture technique that is drawing increasing attention. However, due to their low capture efficiency fisheries sustainability may only be attained by improving the profitability of these gears. The present study attempted to provide the necessary background for the establishment of a cuttlefish (Sepia officinalis) trap fishery in Thermaikos
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The impact of alternative age-length sampling schemes on the performance of stock assessment methods Fish. Res. (IF 2.147) Pub Date : 2021-02-24 Andre E. Punt; Geoffrey N. Tuck; Jemery Day; Paul Burch; Robin B. Thomson; Pia Bessell-Browne
Stock assessments based on fitting age-structured population dynamics models using the integrated approach usually require data on the length-/age-structure of fishery removals and age-length data to estimate key population parameters such as growth rates, recruitment, natural mortality rates and selectivity. The errors in the estimates of these population parameters directly impact the ability to
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Modeling nearshore fish habitats using Alaska as a regional case study Fish. Res. (IF 2.147) Pub Date : 2021-02-23 Arnaud Grüss; Jodi L. Pirtle; James T. Thorson; Mandy R. Lindeberg; A. Darcie Neff; Steve G. Lewis; Timothy E. Essington
Nearshore areas represent important habitats for many species, at least for part of their life cycle. Therefore, modeling and mapping nearshore habitats is essential for natural resource management and conservation, such as determining potential impacts to marine populations and their habitats from human activities and identifying conservation measures. Although fish survey and habitat data are uncommon
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New way to investigate fish density and distribution in the shallowest layers of the open water Fish. Res. (IF 2.147) Pub Date : 2021-02-22 Roman Baran; Petr Blabolil; Martin Čech; Vladislav Draštík; Jaroslava Frouzová; Michaela Holubová; Tomáš Jůza; Ievgen Koliada; Milan Muška; Jiří Peterka; Marie Prchalová; Milan Říha; Zuzana Sajdlová; Marek Šmejkal; Michal Tušer; Lukáš Vejřík; Jan Kubečka
Information about fish distribution and abundance in the upper part of the water column are often fundamental for both research and management. However, this information is extremely hard to obtain using conventional hydroacoustic methods. For this reason, the mobile hydroacoustic upward-looking system (38 kHz split-beam echosounder) in combination with a passive sampling method (gillnets) was tested
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A model-based approach to standardizing American lobster (Homarus americanus) ventless trap abundance indices Fish. Res. (IF 2.147) Pub Date : 2021-02-20 M. Conor McManus; Jeff Kipp; Burton Shank; Kathleen Reardon; Tracy L. Pugh; Josh Carloni; Kim McKown
Fishery-independent ventless trap surveys are an integral component to assessing American lobster (Homarus americanus) population trends, as they can sample complex, heavily fished habitats where most survey gear has difficulty accessing. U.S. American lobster stocks have been assessed within state waters using a standardized ventless trap survey since 2006. However, confounding survey attributes that
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Fishing pressure and lifespan affect the estimation of growth parameters using ELEFAN Fish. Res. (IF 2.147) Pub Date : 2021-02-19 Kun Wang; Chongliang Zhang; Ming Sun; Binduo Xu; Yupeng Ji; Ying Xue; Yiping Ren
Length-based methods of stock assessment to support scientific fisheries management are desirable in data-limited fisheries where formal stock assessments are commonly constrained. Based on length-frequency (LFQ) data, Electronic length frequency analysis (ELEFAN) is widely used to fit growth curves, but the performance of this method is sensitive to various factors especially the quality of data.
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Hierarchical surplus production stock assessment models improve management performance in multi-species, spatially-replicated fisheries Fish. Res. (IF 2.147) Pub Date : 2021-02-16 Samuel D.N. Johnson; Sean P. Cox
Managers of multi-species fisheries aim to balance harvests of target and non-target species that vary in abundance, productivity, and degree of technical interactions. In this paper, we evaluated management performance of five surplus production stock assessment methods used in such a multi-species context. Production models included single-species and hierarchical multi-species models, as well as
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Ontogenetic variation of trophic habitat for sympatric benthic octopods in East China Sea derived from isotopic analysis on beaks Fish. Res. (IF 2.147) Pub Date : 2021-02-15 Zhou Fang; Peiwu Han; Siwenjia Shi; Xinjun Chen
Sympatry is commonly observed in marine species, and always accompanied by high competition. Octopus consists of large amount of species and also widely distributed in the neritic area of the sea. As typical benthic species, octopus tend to live in the similar habitat with less movement during its lifetime. It is important to understand the trophic ecology of sympatric octopod species, which play an
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Dredge selectivity in a Mediterranean striped venus clam (Chamelea gallina) fishery Fish. Res. (IF 2.147) Pub Date : 2021-02-15 Andrea Petetta; Bent Herrmann; Massimo Virgili; Giada Bargione; Claudio Vasapollo; Alessandro Lucchetti
The striped venus clam Chamelea gallina is the target of a large fleet of hydraulic dredgers, which represent an important fishing sector in terms of income and landings in the Mediterranean Sea. Although there is information on the catch rates, impact and discards related to this fishery, the size selection process carried out by the dredge during trawl under commercial conditions is practically unknown
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Fishers as foragers: Individual variation among small-scale fishing vessels as revealed by novel tracking technology Fish. Res. (IF 2.147) Pub Date : 2021-02-12 Timothy H. Frawley; Hannah E. Blondin; Timothy D. White; Rachel R. Carlson; Brianna Villalon; Larry B. Crowder
Effective fisheries management requires an understanding of fisher behavior. Though vessel tracking systems are increasingly used to describe the movements and activities of industrial fishing fleets, their use has been limited within the small-scale fisheries employing the vast majority of the world’s capture fishers. Here we combine novel vessel tracking technology with logbook data to conduct a
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Estimation of key population parameters and MSY-based reference points for sidestripe shrimp (Pandalopsis dispar) in the Fraser River Delta, British Columbia Fish. Res. (IF 2.147) Pub Date : 2021-02-12 Zane Zhang; Ken Fong
Fishery-independent trawl survey data were used to estimate biological parameters for Sidestripe shrimp, Pandalopsis dispar, in the Fraser River delta of British Columbia. Sidestripe shrimp is a short-lived protandric hermaphrodite. They first mature as males, then transition into females in their second year, and then mature as females in their third year. Taking advantages of this unique life history
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Vulnerability assessment of Lake Malawi’s ornamental fish resources to export ornamental trade Fish. Res. (IF 2.147) Pub Date : 2021-02-10 Amulike V. Msukwa; Ian G. Cowx; Jonathan P. Harvey
Productivity Sustainability Analysis (PSA) was used to assess the vulnerability of 103 most targeted ornamental fish species of Lake Malawi to fishing for the export trade. The PSA was based on five productivity and four susceptibility attributes that are relevant to the ornamental fishes of Lake Malawi, and for which information was readily available from the scientific literature. The vulnerability
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Temperature, maternal effects and density-dependent processes during early life stages of Argentine hake as relevant recruitment drivers Fish. Res. (IF 2.147) Pub Date : 2021-02-09 Gustavo J. Macchi; Marina V. Diaz; Ezequiel Leonarduzzi; Martín Ehrlich; Laura Machinandiarena; Mariana Cadaveira; María Inés Militelli
We analyzed the annual variability in total egg production and recruitment of the Patagonian stock of Argentine hake since 1990 and correlated these indices with some environmental variables as temperature and larval density estimated in the spawning area. We used data from research surveys carried out between 2001 and 2018 during the reproductive peak of this stock and information from the assessment
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Validation approaches of a geolocation framework to reconstruct movements of demersal fish equipped with data storage tags in a stratified environment Fish. Res. (IF 2.147) Pub Date : 2021-02-03 Stefanie Haase; Uwe Krumme; Ulf Gräwe; Camrin D. Braun; Axel Temming
Geolocation models are essential tools to derive detailed information on the movement patterns of demersal fish equipped with data storage tags recording temperature and depth. However, modelled horizontal positions are accompanied by an often unknown error which needs to be assessed to support the appropriate interpretation. We conducted five validation experiments in the southern Baltic Sea comprising
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Physiological responses to live air transport of red king crab (Paralithodes camtschaticus) Fish. Res. (IF 2.147) Pub Date : 2021-01-29 Vasco C. Mota; Sten I. Siikavuopio; Philip James
Live transport of red king crab from the fishing grounds to the market is an activity that is increasing and the future sustainability of this practice depends on maintaining optimal animal welfare during transport. The current study evaluated the physiological response of red king crab (Paralithodes camtschaticus) to live air transport, mimicking current commercial practices. Specifically, this study
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Spatial population dynamics of eastern oyster in the Chesapeake Bay, Maryland Fish. Res. (IF 2.147) Pub Date : 2021-01-27 Marvin M. Mace; Kathryn L. Doering; Michael J. Wilberg; Amy Larimer; Frank Marenghi; Alexei Sharov; Mitchell Tarnowski
Incorporating spatial information can improve estimates from stock assessment models when there are differences in population processes (e.g., natural mortality) among areas. Population dynamics of the eastern oyster Crassostrea virginica vary spatially within the Chesapeake Bay, Maryland, and our objective was to better characterize oyster population dynamics by estimating changes in natural mortality
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Object and behavior differentiation for improved automated counts of migrating river fish using imaging sonar data Fish. Res. (IF 2.147) Pub Date : 2021-01-27 Jani Helminen; Tommi Linnansaari
Imaging sonars, such as the Adaptive Resolution Imaging Sonar (ARIS; Sound Metrics Corp.) produce continuous stream of sonar video footage, and they are commonly used for counting and sizing migrating fish in rivers. Although automated methods have been developed for processing imaging sonar data, manual analysis of the data is still common in fish population monitoring projects. In this study, we
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Maturation in the Barents Sea capelin – Contrasting length- and gonad-based metrics Fish. Res. (IF 2.147) Pub Date : 2021-01-25 N.O.A.S. Jourdain; E. Fuglebakk; S. Subbey
It is assumed that maturation in the Barents Sea capelin is length-dependent, and that fish of at least 14 cm will potentially spawn. Current assessment and management models for the stock are based on this assumption of constant maturity at length (MaL). Using data from scientific surveys, this paper examines the validity of the constant MaL assumption, and contrasts it with maturation based on examination
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Physiological effects of catch-and-release angling on freshwater drum (Aplodinotus grunniens) Fish. Res. (IF 2.147) Pub Date : 2021-01-24 Jamie T. Card; Caleb T. Hasler
Many catch-and-release angling events involve air exposure and exhaustive exercise that elicit a physiological stress response, and depending on a variety of factors, delayed mortality is a possible outcome. There have been ample studies in this area, however, significant gaps exist in the literature for species that are targeted by more specialized anglers, such as freshwater drum (Aplodinotus grunniens)
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Small-scale fishing households facing COVID-19: The case of Lake Victoria, Kenya Fish. Res. (IF 2.147) Pub Date : 2021-01-11 Kathryn J. Fiorella; Elizabeth R. Bageant; Lia Mojica; Julia A. Obuya; Jane Ochieng; Pamela Olela; Patrick Wanguche Otuo; Horace Owiti Onyango; Christopher Mulanda Aura; Harriet Okronipa
Small-scale fisheries underpin the aquatic food supply, and are facing acute challenges in the wake of the COVID-19 pandemic. The study aimed to examine how small-scale fishing households, including fishers and fish traders, are responding to COVID-19 and associated movement restrictions around Lake Victoria, Kenya. We conducted phone interviews with 88 households in three riparian communities around
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Elevated stream temperature, origin, and individual size influence Chinook salmon prespawn mortality across the Columbia River Basin Fish. Res. (IF 2.147) Pub Date : 2021-01-22 Tracy E. Bowerman; Matthew L. Keefer; Christopher C. Caudill
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Implementing two-dimensional autocorrelation in either survival or natural mortality improves a state-space assessment model for Southern New England-Mid Atlantic yellowtail flounder Fish. Res. (IF 2.147) Pub Date : 2021-01-20 Brian C. Stock; Haikun Xu; Timothy J. Miller; James T. Thorson; Janet A. Nye
Survival is an important population process in fisheries stock assessment models and is typically treated as deterministic. Recently developed state-space assessment models can estimate stochastic deviations in survival, which represent variability in some ambiguous combination of natural mortality (M), fishing mortality (F), and migration. These survival deviations are generally treated as independent
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Steep recruitment relationships result from modest changes in egg to recruit mortality rates Fish. Res. (IF 2.147) Pub Date : 2021-01-16 Ray Hilborn; Carl J. Walters
Increasing recruitment per mature adult as density declines is a key factor in being able to sustainably exploit populations and the extent of this increase is closely related to the sustainable exploitation rate of fish stocks. Stock-recruitment estimates typically show surprisingly large increases in egg to recruitment survival as density declines. Because egg to recruit survival rates are often
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Allocation of research resources for commercially valuable invasions: Norway's red king crab fishery Fish. Res. (IF 2.147) Pub Date : 2021-01-16 Melina Kourantidou; Brooks A. Kaiser
This paper models the optimal allocation of research resources aimed at understanding the consequences of a marine invasion. The model assumes returns to research are uncertain. Furthermore there are joint returns to research ahead of the invasion frontier and within the already invaded area. Research ahead of the frontier helps define external damages by establishing the baseline ecosystem services
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Winds, waves, warm waters, weekdays, and which ways boats are counted influence predicted visitor use at an offshore fishing destination Fish. Res. (IF 2.147) Pub Date : 2021-01-16 Matthew S. Kendall; Bethany L. Williams; Arliss J. Winship; Mark Carson; Karen Grissom; Timothy J. Rowell; Jenni Stanley; Kimberly W. Roberson
Quantifying the number of recreational fishers is important for many aspects of managing coastal resources. Unfortunately, quantifying recreational boaters in offshore settings has proven difficult due to their distance from shore and a lack of cost-effective methods to monitor small boats (<10 m length). We investigated visitor-use at an offshore marine protected area (MPA) in the southeastern USA
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Long-term changes in population dynamics and life history contribute to explain the resilience of a stock of Micropogonias furnieri (Sciaenidae, Teleostei) in the SW Atlantic Fish. Res. (IF 2.147) Pub Date : 2021-01-16 Manuel Haimovici; Leticia Maria Cavole; Jason M. Cope; Luís Gustavo Cardoso
We analysed the long-term changes in the population dynamics and life history of whitemouth croaker (Micropogonias furnieri) off Southern Brazil, to understand how four decades of heavy fishing (1976–2017) has affected its population dynamics. In the first three decades, size and age structure were eroded with the loss of the larger (> 60 cm total length) and older (>20 yrs. old) individuals. Individual
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Temporal variability in the reproductive parameters of deepwater rockfishes in the Gulf of Alaska Fish. Res. (IF 2.147) Pub Date : 2021-01-13 Christina L. Conrath; Peter-John F. Hulson
Reproductive parameters directly influence estimates of stock biomass and therefore affect the determination of catch levels of many federally managed fish species. These parameters can vary over different temporal scales and a better understanding of how and why reproductive traits change will aid in the management of these species. We examined the reproductive parameters of rougheye rockfish, Sebastes
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European hake (Merluccius merluccius, Linnaeus 1758) spillover analysis using VMS and landings data in a no-take zone in the northern Catalan coast (NW Mediterranean) Fish. Res. (IF 2.147) Pub Date : 2021-01-13 Joan Sala-Coromina; Jose Antonio García; Paloma Martín; Ulla Fernandez-Arcaya; Laura Recasens
The analysis of fish spillover from marine protected areas (MPA) is often based on data collected after the implementation of protection. In the present study we used a methodology based on the combination of Vessel Monitoring System (VMS) and landings data before and after the establishment of protection for spillover analysis. We defined areas of similar size to the protected zone in order to compare
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Corroborating effort and catch from an integrated survey design for a boat-based recreational fishery in Western Australia Fish. Res. (IF 2.147) Pub Date : 2021-01-08 Eva K.M. Lai; Karina L. Ryan; Ute Mueller; Glenn A. Hyndes
Many recreational fisheries do not have mandatory reporting and rely on probability-based survey data to produce estimates of effort and catch to inform management decision making. Reliable data are required for estimates to be accepted by managers and stakeholders. Estimates were determined from off-site Phone-Diary (PD) and on-site Bus-route Access Point (BAP) with supplemented Remote Camera (RC)
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Local markets and price premiums—The case of the establishment of the Stockholm fish auction Fish. Res. (IF 2.147) Pub Date : 2021-01-06 Cecilia Hammarlund; Johan Blomquist; Staffan Waldo
The promotion of locally produced food has been a growing marketing trend in recent years. Locally produced food is associated with positive values such as environmental benefits, fresher and safer products as well as contributing to building closer ties between people in local communities. We use a case study were a local fish auction was established in the Stockholm area in Sweden with the aim to
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Aerial survey as a tool for understanding bigeye scad (Selar crumenophthalmus) dynamics around the island of O'ahu, Hawai’i Fish. Res. (IF 2.147) Pub Date : 2021-01-05 John Wiley; Marlowe Sabater; Brian Langseth
The bigeye scad (Selar crumenophthalmus) supports one of the most productive near-shore fisheries in Hawai'i. Fishing boats frequently work in tandem with spotter planes to efficiently target bigeye scad schools. These spotter planes provide the means for a fishery-independent estimate of abundance based on direct observation, which may prove more sensitive to population trends than traditional estimates
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Bigeye thresher shark Alopias superciliosus movements and post-release survivorship following capture on linked buoy gear Fish. Res. (IF 2.147) Pub Date : 2021-01-02 Scott A. Aalbers; Michael Wang; Charles Villafana; Chugey A. Sepulveda
Off the US west coast, fishery development efforts have led to the recent recommendation for authorization of deep-set buoy gear (DSBG) and linked buoy gear (LBG), two commercial gear types for targeting swordfish at depth during the day. Because the new deep-set configurations interact with bigeye thresher sharks (Alopias superciliosus), a large pelagic species that is not typically retained for sale
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Improving species and size selectivity in the Baltic cod trawl fishery with two simple codend designs Fish. Res. (IF 2.147) Pub Date : 2021-01-02 Niels Madsen; Ólafur A. Ingólfsson; Hans Nilsson; Petri Suuronen
The eastern Baltic cod (Gadus morhua) stock is at a critically low level and recruitment of the western Baltic cod stock is at the lowest observed level in over 30 years. The EU (European Union) landing obligation was introduced in 2015 for cod and in 2017 for plaice (Pleuronectes platessa). Size selective codend designs have been used in the Baltic cod trawl fishery for 25 years; however, there are
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Modeling Atlantic herring fisheries as multiscalar human-natural systems Fish. Res. (IF 2.147) Pub Date : 2020-12-31 Andrew K. Carlson; Daniel I. Rubenstein; Simon A. Levin
Fisheries contribute to food and nutrition security, livelihoods, and poverty alleviation for billions of people globally. However, human-environmental interactions in fisheries are rarely assessed locally, regionally, and globally at the same time, limiting social-ecological resilience in fisheries management. We evaluated worldwide catches of a keystone forage fish (Atlantic herring, Clupea harengus)
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Modeling round goby growth in Lake Michigan and Lake Huron with multi-model inference Fish. Res. (IF 2.147) Pub Date : 2020-12-30 Youjian Duan; Charles P. Madenjian; Yingming Zhao; Bin Huo
Although the round goby Neogobius melanostomus has become established throughout the Laurentian Great Lakes, a multi-model inference (MMI) approach toward characterizing round goby growth in the Laurentian Great Lakes has yet to applied using otolith-derived data. Further, spatial variation in round goby growth among lakes has yet to be investigated. For each sex, growth of round gobies at three locations
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Estimates of availability and catchability for select rockfish species based on acoustic-optic surveys in the Gulf of Alaska Fish. Res. (IF 2.147) Pub Date : 2020-12-30 Darin T. Jones; Christopher N. Rooper; Christopher D. Wilson; Paul D. Spencer; Dana H. Hanselman; Rachel E. Wilborn
Fishery-independent surveys, such as bottom trawl surveys, provide time-series abundance estimates, which inform many modern stock assessments. Area-swept biomass estimates from trawl surveys assume that fish densities do not differ between trawlable (T) and untrawlable (UT) areas. Bias and imprecision in the biomass estimates can occur when this assumption is not met. Thus, reliable estimates are
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Collating stock assessment packages to improve stock assessments Fish. Res. (IF 2.147) Pub Date : 2020-12-26 Catherine M. Dichmont; Roy A. Deng; Natalie Dowling; André E. Punt
Stock assessments are integral to fisheries management, and the demand for stock assessments based on population dynamics models continues to increase. Historically, stock assessments have been based on bespoke methods and software. There is now a trend towards the use of flexible, documented, tested and maintained software packages, because use of such packages increases efficiency and consistency
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Patterns in oyster natural mortality in Chesapeake Bay, Maryland using a Bayesian model Fish. Res. (IF 2.147) Pub Date : 2020-12-26 Kathryn L. Doering; Michael J. Wilberg; Dong Liang; Mitchell Tarnowski
Bivalves leave behind articulated valves when they die that can be used to estimate natural mortality. However, a common method used to estimate natural mortality in bivalves, known as the box count method, includes several assumptions that may be violated for eastern oysters Crassostrea virginica in Chesapeake Bay, Maryland. We developed a Bayesian model alternative to the box count method that included
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Effects of temperature on somatic growth, otolith growth, and uncoupling in the otolith to fish size relationship of larval northern pike, Esox lucius L Fish. Res. (IF 2.147) Pub Date : 2020-12-26 Dariusz P. Fey; Martyna Greszkiewicz
Verifying the link between somatic and otolith growth is crucial for a number of analyses that provide data on the ecology of early life stages of fish. In the current study, sagittal and lapillar otoliths were extracted from larval northern pike (n = 720) that were reared from eggs in RAS systems at three temperatures (10 °C, 15 °C, and 22 °C) for 28 days. The growth rate (SL at age) of larval northern
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The environmental impacts of pelagic fish caught by Scottish vessels Fish. Res. (IF 2.147) Pub Date : 2020-12-23 Frances Sandison; Jon Hillier; Astley Hastings; Paul Macdonald; Beth Mouat; C. Tara Marshall
Food production is estimated to emit between 20–30 % of global anthropogenic carbon emissions. The need to achieve net zero emissions requires a transition to low carbon, sustainable food sources. Of the total greenhouse gas (GHG) emissions for food production, only 4 % are attributed to wild capture fisheries. However, within seafood GHG studies a wide range of estimates can be found across different
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Marine chemistry variation along Greenland’s coastline indicated by chemical fingerprints in capelin (Mallotus villosus) otoliths Fish. Res. (IF 2.147) Pub Date : 2020-12-23 Peter Fink-Jensen; Teunis Jansen; Tonny Bernt Thomsen; Simon Hansen Serre; Karin Hüssy
The small pelagic fish capelin (Mallotus villosus) is widely distributed in the Arctic, where it plays a central role in the marine food web as prey for numerous fish, birds, and mammals. Sustainable fisheries management advice for capelin that spawn in Greenland is non-existent due in part to a lack of biological information on population structure and spatial dynamics. This study provides a chemical
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Evaluating the role of bycatch reduction device design and fish behavior on Pacific salmon (Oncorhynchus spp.) escapement rates from a pelagic trawl Fish. Res. (IF 2.147) Pub Date : 2020-12-21 Noëlle Yochum; Michael Stone; Karsten Breddermann; Barry A. Berejikian; John R. Gauvin; David J. Irvine
Pacific salmon (Oncorhynchus spp.) bycatch is a significant driver in the management of walleye pollock (Gadus chalcogrammus) pelagic trawl fisheries in the North Pacific. Various bycatch reduction devices that permit salmon to escape from the trawl (‘excluders’) have been developed. High variability in escapement rates from the excluders underscores a lack of understanding regarding mechanisms that
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A review of recent studies on the life history and ecology of European cephalopods with emphasis on species with the greatest commercial fishery and culture potential Fish. Res. (IF 2.147) Pub Date : 2020-12-22 F. Lishchenko; C. Perales-Raya; C. Barrett; D. Oesterwind; A.M. Power; A. Larivain; V. Laptikhovsky; A. Karatza; N. Badouvas; A. Lishchenko; G.J. Pierce
With the depletion of many commercial fish stocks and an increasing demand for marine protein for human consumption, cephalopods have become more important as a fishery resource. In EU waters, cephalopod stocks are not routinely assessed and exploitation of these species by large-scale fisheries is largely unregulated. For sustainable exploitation, adequate assessment and scientifically-supported management
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Spatio-temporal model reduces species misidentification bias of spawning eggs in stock assessment of spotted mackerel in the western North Pacific Fish. Res. (IF 2.147) Pub Date : 2020-12-21 Yuki Kanamori; Shota Nishijima; Hiroshi Okamura; Ryuji Yukami; Mikio Watai; Akinori Takasuka
Species identification based on morphological characteristics includes species misidentification, leading to estimation bias in stock assessment and posing challenges difficult to be resolved. The spawning eggs of spotted mackerel Scomber australicus and chub mackerel S. japonicus in the western North Pacific are used for stock assessment as an index of spawning biomass and are classified based on
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Right on target: using data from targeted stocks to reconstruct removals of bycatch species, a case study of longnose skate from Northeast Pacific Ocean Fish. Res. (IF 2.147) Pub Date : 2020-12-21 Vladlena V. Gertseva; Sean E. Matson
Fisheries stock assessments rely heavily on historical catch information to understand how a stock responds to exploitation and make meaningful forecasts under alternative management and environmental scenarios. However, for many bycatch species historical removals are virtually unknown, as a large portion of the catch was discarded at sea. For example, historical discard of elasmobranch species such
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A logistic function to track time-dependent fish population dynamics Fish. Res. (IF 2.147) Pub Date : 2020-12-18 Mahmood Jokar; Sam Subbey; Harald Gjøsæter
This paper uses a two-parameter logistic function to model the dynamics of length-at-maturation for the Barents Sea capelin over the past 47 years. We estimate the function parameters using a combination of length-age data from scientific surveys, and commercial catch statistics. Using temporal variability in the function parameters, we demonstrate that the time series of stock biomass defines a three-state
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Larval drift dynamics, thermal conditions and the shift in juvenile capelin distribution and recruitment success around Iceland and East Greenland Fish. Res. (IF 2.147) Pub Date : 2020-12-18 Teunis Jansen; Flemming Thorbjørn Hansen; Birkir Bardarson
Global warming is not uniformly distributed, the climate is expected to change most rapidly in the arctic regions. Large scale changes in the arctic biosphere is therefore of particular concern. Capelin (Mallotus villosus) is a keystone species in the many arctic marine ecosystem including the seas around Iceland in Greenland. Its summer/autumn distribution has shifted over thousands of kilometres
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Reproductive dynamics of a swimming crab (Monomia haanii) in the world’s crab basket Fish. Res. (IF 2.147) Pub Date : 2020-12-14 Bai-an Lin; Robert Boenish; Jake Kritzer; Yan Jiang; Song-lin Wang; Min Liu
Red swimming crab Monomia haanii is an important export fishery in southern China. M. haanii is mainly sold as lump crabmeat, generating an annual trade of tens of millions of US dollars over the last decade. For such a commercially important crab species, little attention has been paid to the sustainable use of the stocks and there remains much to learn about its biology and ecology. Monthly fishery-dependent
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Exploring the management policy of distant water fisheries in China: Evolution, challenges and prospects Fish. Res. (IF 2.147) Pub Date : 2020-12-13 Jinkai Yu; Qingchao Han
China's distant water fisheries management policy has made significant contributions to the development of distant water fisheries since 1985. Analyzing the evolution of China's distant water fisheries management policy is conducive to solving China's frequent IUU problems and promoting further development of sustainable fisheries. This paper first summarizes how China's distant water fisheries management
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The sharks and rays at Singapore’s fishery ports Fish. Res. (IF 2.147) Pub Date : 2020-12-10 Naomi Clark-Shen; Kathy Xu Tingting; Madhu Rao; Shannon Cosentino-Roush; Rajkumar Sandrasegeren; Anya R. Gajanur; Demian D. Chapman; Esther Lee Xin Ying; Kathryn I. Flowers; Kevin A. Feldheim; B. Mabel Manjaji-Matsumoto; Sirius Ng Zheng Hui
The status of elasmobranchs in Southeast Asia has been highlighted as a serious concern, yet there are limited data to assess stocks and develop appropriate management plans. Surveys of elasmobranchs at two fishery ports in Singapore were conducted between 2017 and 2020. These fishery ports receive fresh, whole imports of seafood from the region as well as seafood caught in Singapore waters. Data were
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Environmental drivers of commercial blue swimmer crab (Portunus armatus) catch rates in Western Australian fisheries Fish. Res. (IF 2.147) Pub Date : 2020-12-08 Danielle J. Johnston; Daniel E. Yeoh; David C. Harris
Sustainable fisheries management requires accurate stock assessment and an understanding of how targeted populations vary over space and time and respond to external stressors. Commercial fishery catch rate data (i.e. catch per unit of effort; CPUE) are widely used to assess fishery performance and can provide a measure of stock abundance. However, changes in environmental conditions can influence
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Genetic mixed-stock analysis of short mackerel, Rastrelliger brachysoma, catches in the Gulf of Thailand: Evidence of transboundary migration of the commercially important fish Fish. Res. (IF 2.147) Pub Date : 2020-12-06 Sirithorn Kongseng; Ratanavaree Phoonsawat; Worawit Wanchana; Akarapong Swatdipong
Short mackerel, Rastrelliger brachysoma, is one of commercially important marine species in the Gulf of Thailand. The mackerel resource has been faced with overfishing and sharply declined. Here, genetic mixed-stock analysis was performed using eleven microsatellite loci on 1675 short mackerel individuals caught, in 2014, from its four major fishing grounds of Thai waters in the Gulf of Thailand. Short
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Fisheries for common octopus in Europe: socioeconomic importance and management Fish. Res. (IF 2.147) Pub Date : 2020-12-05 Cristina Pita; Katina Roumbedakis; Teresa Fonseca; Fábio L. Matos; João Pereira; Sebastián Villasante; Pablo Pita; José Maria Bellido; Angel F. Gonzalez; Manuel García-Tasende; Evgenia Lefkaditou; Aggeliki Adamidou; Danila Cuccu; Paola Belcari; Ana Moreno; Graham J. Pierce
The European Union (EU) is one of the most important markets for cephalopods in the world. Currently, small-scale fisheries targeting the common octopus in the EU are of considerable social and economic importance, especially in southern European waters where more octopus are consumed as part of the traditional diet. Octopuses in Europe are excluded from quota regulations under the Common Fisheries
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