Showing papers in "Fisheries Research in 2020"

TL;DR: In this article, the authors propose a method to determine the most appropriate spatial scope and structure for fishery stock assessment based on population dynamics theory, case studies in fishery management, and simulation tests.

TL;DR: In this paper, a bottom trawl survey in the coastal waters of Shandong Peninsula, China was used to evaluate the predictive performance of RF models for 21 marine demersal species.

TL;DR: Greater use of management strategy evaluation is needed before COMs can be considered a reliable tool for management, and performance in estimating stock status is not sufficient for gauging the usefulness of COMs in managing fisheries.

TL;DR: Future needs for features cannot be anticipated, so the key design consideration for the next-generation stock assessment package is to be flexible and modifiable to meet the requirements of analysts and users.

TL;DR: In this paper, the authors examined the characteristics and retention patterns of the users of a Danish citizen science smartphone application and website that allow anglers to report data from fishing trips and found that users of the citizen science platform were younger, more specialized, and had higher catch rates than non-users.

TL;DR: In this paper, a review of current knowledge and understanding of the stock structures of skipjack, yellowfin, bigeye and South Pacific albacore tunas in the Pacific Ocean is presented.

TL;DR: In this paper, the authors present a publicly available, comprehensive dataset presenting the historical reported landed catches plus preliminary discards of these species in space for 1950-2016. And they provide a preliminary estimate of marine finfishes discarded by these fisheries, which suggests that current public reporting efforts are insufficient to fully and transparently document the global historical extent of fisheries for tuna and other large pelagic fishes.

TL;DR: In this article, the impacts of fishing are investigated using catch and effort data that have been consistently recorded for the past two decades, and it is evident that water transparency in the offshore decreased from close to 8m in late 1920s to less than 2m in the 1990s before improving to about 4m in 2010s, a reflection of change in ecosystem functioning.

TL;DR: In this paper, the authors show that the coefficients of the total landings, landed values, mean catches and price per kg of migratory and resident species are constant over time following the installation of two large run-of-the-river hydroelectric dams in a large tropical river.

TL;DR: This paper used catch and effort data and a Bayesian depletion estimator to estimate pre-season abundance of the coastal population of legal-sized male Dungeness crab from 1970 to 2016 (California) or 1982-2016 (Oregon and Washington) and estimate that the fishery takes 9 %-98 % of the legal-size male population each year, averaging 66 %.

TL;DR: In this paper, DNA barcoding was used to assess levels of mislabeling or substitution through molecular identification of fresh fish fillets sold in different seafood markets throughout the Province of Buenos Aires, Argentina.

TL;DR: In this paper, a spatio-temporal modelling approach for analyzing age- or size-specific catch-per-unit-effort (CPUE) data to develop indices of relative abundance and associated composition data is presented.

TL;DR: In this article, the authors tested for hyperstability in seasonal and interannual trends in angler effort, catch and harvest rates in bluegill (Lepomis macrochirus), black crappie (Pomoxis nigromaculatus), and yellow perch (Perca flavescens) across hundreds of Wisconsin, USA, lakes from 1990 to 2019.

TL;DR: In this paper, the authors explored trade-offs between fish quality, fishing efficiency, costs and profitability across three different vessel groups in the Norwegian groundfish fishery, that is, vessels fishing with bottom trawls, longlines and Danish seines.

TL;DR: In this paper, the authors examine the Tonle Sap region of Cambodia and find that rice field fishery catch provided around 60% of the fish and aquatic animals consumed in surveyed households.

TL;DR: In this article, a novel methodology is presented which utilizes random forest classification to translate the acoustic backscatter from the buoys into metrics of tuna presence and abundance, and the analysis showed accuracies of 75 and 85 % for the recognition of the presence/absence of tuna aggregations under DFADs in the Atlantic and Indian Oceans, respectively.

TL;DR: In this article, the authors provide a synthesis across seven jurisdictions of the types of diagnostic statistics and plots that can be used to evaluate whether a proposed assessment is "best available science" and summarize several cases where a proposed stock assessment was not accepted for use in management, and how jurisdictions are able to provide management advice when a stock assessment is rejected.

TL;DR: The results indicate that both spawner abundance and environment might drive recruitment in many stocks, but the apparent effect ofspawner abundance might be a by-product of long-term recruitment changes caused by environmental conditions in some cases.

TL;DR: JABBA-Select as mentioned in this paper is an extension of the JABBA software that is able to overcome some of the shortcomings of conventional SPMs and allows a direct comparison to ASPMs.

TL;DR: DNA sequence-based barcoding was applied to tissue samples from commercial products and restaurant offerings labeled as Atlantic cod in Spain, finding no evidence of distinct geographic patterns of mislabeling, although tissue samples obtained from restaurants were more likely to be mislabeled than those sampled in markets and supermarkets.

TL;DR: In this paper, a catch-based study over the 1950-2015 period was conducted to study the long-term changes in ecosystems and disentangle the influence of overfishing and environment require historical data integration.

TL;DR: Wang et al. as mentioned in this paper combined a yield-density model and weighted statistical analysis to develop a habitat suitability index (HSI) model to identify the relationship between oceanographic variables and potential habitat.

TL;DR: The immediate mortality of several threatened species discarded from gillnets deployed off eastern Australia to target key carcharhinids and white sharks, Carcharodon carcharias and causal factors for abundant elasmobranchs are described.

TL;DR: Marine recreational fishing (MRF) in Cyprus (Eastern Mediterranean) was evaluated using telephone surveys between 2016 and 2018 as discussed by the authors, which highlight the great magnitude of this sector in terms of catches, as well as its social and economic significance.

TL;DR: The Stan software package provides an advanced Markov chain Monte Carlo sampler and diagnostics that are not available in other packages for fitting Bayesian models, and these diagnostics are compared among multiple parameterizations of a state-space biomass dynamics model.

TL;DR: In this article, the authors focused on the drag of bottom trawl models constructed from traditional and new materials, such as Dyneema and nylon monofilament, respectively.

TL;DR: Zhang et al. as mentioned in this paper investigated the connectivity among four spawning grounds along a latitudinal gradient spanning much of the known species range in the Yellow Sea and the East China Sea [Qingdao (QD), Lvsi (LS), Xiangshan (XS), and Fuzhou (FZ).

TL;DR: In this paper, a detailed overview of the technical features of Mediterranean passive nets highlighted that they catch mature individuals above the minimum conservation reference size and are therefore size-selective This characteristic goes a considerable way towards achieving several conservation priorities: to reduce fishing mortality, to minimize the capture of juveniles and discards, to spare sexually immature individuals, thus improving spawning stock biomass and increasing the yield per recruit while attenuating the impacts on benthic ecosystems.

TL;DR: In this paper, the authors investigated the combined effects of forest cover, river water level, fishing effort and distance from nearest urban center on the catch of the most exploited fish taxa.

TL;DR: Given the complex pattern of genetic differentiation of Japanese whiting among Chinese and Japanese populations, it is suggested treating them as different management units in utilization of offshore fisheries resources.