Article
Engineering, Marine
Jiasheng Li, Xuesen Cui, Fenghua Tang, Wei Fan, Zhen Han, Zuli Wu
Summary: This study analyzes the spatial variation in the distribution of fishing activity and the change of fishing ground gravity for neon flying squid using AIS data. The results show a positive correlation between latitudinal fishing ground gravity and Kuroshio Extension indicators based on high-frequency EKE. Furthermore, the Kuroshio Extension indicators have a positive relationship with the number of eddies generated in the fishing ground. This research highlights the importance of understanding the influence of eddies and the Kuroshio on the distribution of neon flying squid.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Fisheries
Gang Li, Zhengwei Lu, Yangming Cao, Lijin Zou, Xinjun Chen
Summary: Different fishing efforts are quantified using various units such as vessel numbers, days, voyages, and hooks. In squid-jigging fisheries, valid units for calculating catch per unit effort (CPUE) include fishing hours, fishing days, and vessel numbers. Using a vessel monitoring system (VMS), CPUE in the equatorial waters of the eastern Pacific was evaluated and standardized based on factors like sea surface temperature and chlorophyll-a. The results showed significant effects of factors like latitude and sea surface temperature on CPUE, and the standardized CPUE was highly related to the nominal CPUE.
Article
Agriculture, Multidisciplinary
Yoshiki Kato, Toshiaki Shitamitsu, Makoto Okazaki, Hideyuki Yamashita
Summary: The neon flying squid, an economically important oceanic species, has been commercially harvested in the North Pacific by Japan, Korea, China, and Taiwan. A long-term research conducted by the Fisheries Research Agency of Japan from 1980 to 2009 collected data to understand the resource ecology of this species. A habitat map was created using a generalized additive model and ocean/sea ice reanalysis data, revealing a high abundance area at the Subarctic Frontal Zone (SAFZ) with increasing squid abundance from April to August. This research suggests that the SAFZ plays a crucial role in North Pacific ecosystems by providing optimal conditions for the neon flying squid in terms of temperature and food density.
JARQ-JAPAN AGRICULTURAL RESEARCH QUARTERLY
(2023)
Article
Fisheries
Yingjie Fei, Shenglong Yang, Mengya Huang, Xiaomei Wu, Zhenzhen Yang, Jiangyue Zhao, Fenghua Tang, Wei Fan, Sanling Yuan
Summary: Understanding the spatial distribution of fishing activity and suitable fishing areas is crucial for sustainable fisheries management. This study developed habitat suitability index models using marine environmental data to identify climate-related habitat changes and variations in the distribution of fishing activity for squid-jigging vessels in the Northwest Pacific Ocean. The results showed significant seasonal changes in suitable fishing areas, and the weighted arithmetic mean method performed better in predicting fishing activity. The study emphasizes the importance of managing high fishing pressure areas and acknowledges the limitations of fishery data.
Article
Biodiversity Conservation
Shenglong Yang, Yingjie Fei, Linlin Yu, Fenghua Tang, Shengmao Zhang, Tianfei Cheng, Wei Fan, Sanling Yuan, Heng Zhang, Keji Jiang
Summary: This study investigates the spatial distribution of squid-jigging fleets in the North Pacific Ocean and identifies the drivers of fishing activities. The results show that fishing effort has significant seasonality and is influenced by marine environmental factors, with sea surface temperature being the most significant factor. The findings of this study can provide guidance for fishery management and sustainable development.
ECOLOGICAL INDICATORS
(2023)
Article
Fisheries
Wei Yu, Jian Wen, Xinjun Chen, Yi Gong, Bilin Liu
Summary: The study found that habitat patterns of neon flying squid and jumbo flying squid in the Northwest Pacific Ocean and Southeast Pacific Ocean changed during 1950-2015, influenced by Pacific Decadal Oscillation.
FISHERIES RESEARCH
(2021)
Article
Environmental Sciences
Yuchen Zhang, Wei Yu, Xinjun Chen, Mo Zhou, Chunling Zhang
Summary: This study evaluates the impact of mesoscale eddies on the abundance and habitat distribution of neon flying squid in the Northwest Pacific Ocean. The findings suggest that suitable thermal conditions and favorable foraging conditions within anticyclonic eddies are the main drivers of high squid abundance in warm eddies.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Engineering, Marine
Yingjie Fei, Shenglong Yang, Wei Fan, Huimin Shi, Han Zhang, Sanling Yuan
Summary: Understanding fishing activities at sea is crucial for fisheries science, public authorities, and policy-makers. This study analyzes the behavior of squid-jigging vessels and their distribution in the North Pacific Ocean, taking into account spatial-temporal factors and marine environmental factors. The results reveal seasonal variations in fishing effort and a nonlinear relationship between fishing effort and environmental factors. The study provides valuable insights into the spatial-temporal distribution characteristics of squid-jigging vessels and their relationship with the marine environment.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Alexandra B. Macfarland, Emily E. Joyce, Xuchen Wang, Wendell W. Walters, Katye E. Altieri, Hayley N. Schiebel, Meredith G. Hastings
Summary: Determining the magnitude and origins of anthropogenic nitrogen deposition in the open ocean is crucial for understanding its impact on oceanic biogeochemical cycles. This study investigates the contribution of anthropogenic and marine sources to reactive nitrogen deposition in the North Pacific Ocean, focusing on ammonium (NH4+), a key bioavailable nutrient. Agricultural activities are found to be the primary source of NH4+ deposited in the study area, which serves as a proxy for continental emissions.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Oceanography
Alan J. Jamieson, Heather A. Stewart
Summary: This study focuses on the deep-sea topography of the Northwest Pacific Ocean, revealing that the Mariana Trench is actually made up of five isolated areas and the Japan Trench forms one continuous hadal habitat. By evaluating the frequency and distribution of smaller features, it was found that the total area of depths exceeding 6000 meters in the northwest Pacific is considerably larger than previously anticipated.
PROGRESS IN OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Junhyeong Seo, Doshik Hahm, Guebuem Kim, Inhee Lee, Jihyun Park, Taehee Na, Jae-Hyoung Park, Sok Kuh Kang, Jeomshik Hwang
Summary: In this study, the effects of eddies and typhoons on the biogeochemistry of the tropical northwest Pacific were investigated. The results suggest that these processes do not have a significant influence on biological production in this region. The findings also indicate that the disturbances caused by mesoscale processes may have a smaller effect in the highly oligotrophic northwest Pacific compared to other parts of the world.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Thermodynamics
Hanbin Gu, Peter Stansby, Zhaode Zhang, Gancheng Zhu, Pengzhi Lin, Huabin Shi
Summary: This paper assesses the application of wave power capture on a squid jigging ship, aiming to decrease operating costs and reduce carbon emissions. It provides a brief history of wave energy devices and generation on ships, and proposes a new wave energy device specifically designed for an ocean squid jigging ship. Through numerical simulations and experimental tests, the study analyzes the wave energy captured and designs 20 layout options for the device. The optimum radius is found to be 2 m, with a maximum annual average power of 136 kW, which can supply about 10% of the power consumption for the squid jigging ship.
Article
Engineering, Marine
Jia Li, Wen Yu, Jianhua He, Zhi Zeng
Summary: This study developed a simulated model of squid using MRI technology to study radiation dosimetry. The results showed that the radiation dose from the Fukushima accident exceeded safety standards.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Vasiliy Yu. Tsygankov, Maksim M. Donets, Aleksandr N. Gumovskiy, Nadezhda K. Khristoforova
Summary: The present study investigated the biotransport of OCPs and PCBs by Pacific salmon on the northwestern Pacific Ocean. Coastal water pollution has significantly decreased in recent years, resulting in lower levels of OCPs and PCBs.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Jiaqi Zhang, Bilin Liu, Song Hu, Yi Gong
Summary: Stable isotope analysis was used to study the trophic structure of marine micronekton in the Northwest Pacific Ocean. The results showed significant differences in carbon and nitrogen stable isotope values among different species, with average trophic levels of 3.3±0.3 for cephalopods, 3.7±0.6 for fishes, and 4.0±0.3 for shrimps.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Fisheries
Miguel Petrere Jr, Davi Butturi-Gomes
Summary: This short communication aims to raise awareness about the misuse of confidence intervals in Ecology and Fisheries statistical models that ignore the lack of independence.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Peter-John F. Hulson, Benjamin C. Williams
Summary: This study evaluates the impact of considering ageing error and growth variability on the determination of input sample size (ISS) in statistical catch-at-age assessment models. The results show that including these sources of uncertainty decreases the ISS determined through bootstrap methods. This indicates that there is more variability in age composition and conditional age-at-length data than previously accounted for. Including these sources of uncertainty improves the estimation of ISS and subsequently improves the quality of stock assessment models.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Jason M. Cope
Summary: Fishery resource assessment is a complex and challenging task, but with the use of different analysis methods and tools, effective management guidance can be provided even with limited data and resources.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Regina L. Cunha, Joana I. Robalo, Sara M. Francisco, Ines Farias, Rita Castilho, Ivone Figueiredo
Summary: Recent advances in genomics have greatly contributed to the assessment of fish stocks by providing precise identification of genetic boundaries. This study used a genotyping-by-sequencing approach to reveal the existence of an additional genetic cluster of blackspot seabream in the northeast Atlantic, which was not previously identified. Factors such as ocean circulation patterns and local upwelling may play a role in the genetic differentiation observed in this study.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Huihua Lee, Mark N. Maunder, Kevin R. Piner
Summary: Estimating growth is important for fish population assessment. Integrated assessment models and the influence of misfitting size composition data have renewed interest in how growth is modeled. The available data types control how the length-at-age relationship is estimated. Estimating length-at-age is complex due to multiple sources of biological variability and difficulties in obtaining representative samples.
FISHERIES RESEARCH
(2024)
Article
Fisheries
A. Ladino, I. Perez-Arjona, V. Espinosa, M. Chillaron, V. Vidal, L. M. Godinho, G. Moreno, G. Boyra
Summary: This study examines the acoustic properties of skipjack tuna and Atlantic mackerel, both bladderless pelagic fish species, and explains the significant differences observed. The research shows that the differences in material properties of their tissues predict a more than 10 dB greater reduced target strength in skipjack compared to mackerel at certain frequencies.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Nelly Pena-Cutimbo, Cristel Cordero-Maldonado, Clara Ortiz-Alvarez, Joanna Alfaro-Shigueto, Jeffrey C. Mangel
Summary: Bycatch is a global problem for marine megafauna. This study assessed the bycatch interactions of the Peruvian artisanal purse-seine fishery in 2019 and found that all taxa groups were affected by bycatch. Dusky dolphins, guanay cormorants, and eagle rays were the most frequently reported bycatch species.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Jen-Ming Liu, Po-Yuk So
Summary: The set-net fishery is an environmentally friendly fishery posing little risk to the marine ecosystem. This study identified ocean temperature, sea surface factors, and climatic factors as the main factors affecting the installation of set-nets.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Josie L. Palmer, Carina Armstrong, Hasan D. Akbora, Damla Beton, Cigdem Caglar, Brendan J. Godley, Kristian Metcalfe, Meryem Ozkan, Robin T. E. Snape, Annette C. Broderick
Summary: Small-scale fisheries are vital for global food security and cultural heritage, but the lack of information hampers effective management and mitigation of ecological impacts. This study provides the first comprehensive overview of the small-scale fishery fleet in Northern Cyprus. The fleet operates mainly over the continental shelf, using static and demersal gear types, and catches a diverse range of species, some of which are threatened. The findings can be used to improve fisheries management and conservation measures.
FISHERIES RESEARCH
(2024)