Article
Fisheries
Guanyu Hu, Zhenfang Zhao, Bilin Liu, Dongming Lin, Jiawei Liang, Zhou Fang, Xinjun Chen
Summary: This study analyzed the fatty acid composition of muscle tissues in three size groups of jumbo squid Dosidicus gigas off the Peruvian exclusive economic zone, revealing variations in their feeding strategies. The large-sized group feeds more frequently in nearshore and deep waters and occupies the widest trophic niche. There is also evidence of trophic niche overlap between the small and medium-sized groups, as well as sexual variations in the feeding strategies.
Article
Oceanography
Yu Wei, Feng Zhiping, Li Nan, Chen Bingjian, Chen Xinjun
Summary: This study used the MaxEnt model to examine the habitat hotspots of jumbo flying squid in summer and autumn along the coast of Chile. The study found that the key environmental factors and their suitable ranges for the squid varied significantly between different months.
JOURNAL OF OCEAN UNIVERSITY OF CHINA
(2022)
Article
Fisheries
Tadanori Yamaguchi, Katsumi Takayama, Naoki Hirose
Summary: The study found that there are differences in size among mature female Swordtip squid born under different temperature conditions. Small mature female squid would hatch in the southern East China Sea in winter and migrate to the Sea of Amakusa via the Kuroshio Current. The analysis also revealed that the empirical water temperature history and the depth of the waters where the squid were caught were the two major differences between them. After reaching the minimum age of maturity, the squid could begin to mature when the water temperature in the bottom layer exceeded approximately 16 degrees Celsius and take about one month to reach full maturity.
FISHERIES RESEARCH
(2022)
Article
Fisheries
Ya Ting Dan, Bi Lin Liu, Xin Jun Chen, Wei Guo Qian
Summary: The Dosidicus gigas (jumbo flying squid) is highly sensitive to climate variability and marine environment changes, which have significant impacts on its population structure and development. La Nina events benefit individual growth and delay sexual maturity, while El Nino events inhibit growth and accelerate sexual maturity of the D. gigas.
FISHERIES OCEANOGRAPHY
(2022)
Article
Polymer Science
Veronika Anohova, Lyudmila Asyakina, Olga Babich, Olga Dikaya, Aleksandr Goikhman, Ksenia Maksimova, Margarita Grechkina, Maxim Korobenkov, Diana Burkova, Aleksandr Barannikov, Anton Narikovich, Evgeny Chupakhin, Anatoly Snigirev, Sergey Antipov
Summary: The directed formation of living cell structures is crucial for tissue engineering. New 3D scaffold materials for living tissues are essential for the widespread use of regenerative medicine. This manuscript demonstrates the molecular structure study of Dosidicus gigas collagen and the potential for obtaining a thin membrane material. The collagen membrane exhibits high flexibility, plasticity, and mechanical strength.
Article
Ecology
Jiangtao Fan, Zhou Fang, Shengwei Ma, Peng Zhang, Zuozhi Chen
Summary: Sthenoteuthis oualaniensis is an important economic squid resource in the South China Sea. This study analyzed the composition, age, and growth pattern of its spawning population. The results showed significant sexual differences and growth pattern variations among different populations.
REGIONAL STUDIES IN MARINE SCIENCE
(2022)
Article
Food Science & Technology
Guancheng Lv, Yanjiao Chu, Zhi Chen, Chen Cheng, Ziyuan Zhang, Chunyan Mao, Shanggui Deng, Yuanpei Gao, Ru Jia
Summary: Organic salts have a positive effect on the quality of squid surimi gel, improving gel strength and network structure, shortening the gel degradation temperature range, and accelerating protein aggregation.
JOURNAL OF TEXTURE STUDIES
(2023)
Article
Fisheries
Huajie Lu, Yuzhe Ou, Yurong Teng, Ziyue Chen, Xinjun Chen
Summary: Based on the analysis of samples collected by Chinese commercial jigging vessel in the Japan Sea, this study revealed the age, growth, and population structure of B. magister shevtsovi. The results showed that B. magister shevtsovi is a high-growing squid with differences in growth between males and females, particularly in the relationship between age and body weight. This study provided important information on the basic characteristics of this species.
Article
Fisheries
Guan Yu Hu, Jian Hua Li, Bi Lin Liu, Na Liu, Xin Jun Chen
Summary: The use of stable isotope analysis on the sclerotised beaks of cephalopods has provided insights into their habitat and trophic ecology, revealing potential ontogenetic habitat shifts and foraging-ecology changes in Humboldt squid off the coast of Ecuador. Significant differences in isotopic values were found between sections, with an overall decrease observed across the beak crest. The high individual variation in delta N-15 values suggests a generalist food spectrum for Dosidicus gigas in the study area.
MARINE AND FRESHWATER RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Zhiping Feng, Wei Yu, Xinjun Chen
Summary: Understanding the concurrent habitat variations of Dosidicus gigas and Trachurus murphyi off Chile is important for sustainable exploitation and fisheries management. This study found that both species were significantly influenced by the Pacific Decadal Oscillation (PDO) and key environmental factors. In the warm PDO regime, D.gigas contracted and shifted southwestward, while T.murphyi showed little change in area and distribution but enhanced habitat quality. In the cold PDO regime, D.gigas expanded and moved northeastward, while T.murphyi had slightly reduced suitable habitats. The PDO played a significant role in the long-term habitat variations of these two species.
JOURNAL OF MARINE SYSTEMS
(2022)
Article
Biotechnology & Applied Microbiology
Zhenfang Zhao, Guanyu Hu, Zhou Fang, Jinhui Li, Bilin Liu, Xinjun Chen
Summary: In this study, the feeding strategies and coexistence patterns of large-, medium-, and small-sized groups of D. gigas were investigated using beak morphology and stable carbon and nitrogen isotopes analysis. The results showed high niche overlap between medium- and small-sized groups, whereas the large-sized group differed significantly. Additionally, the niche width of females was larger than that of males in all groups. These findings demonstrated that the three different size groups of D. gigas adopted a feeding strategy with inter- and intra-group regulation to maximize resource utilization and enable coexistence.
MARINE BIOTECHNOLOGY
(2023)
Article
Fisheries
Yu-Zhe Ou, Hua-Jie Lu, Hong-Hao Wang, Zi-Yue Chen, Mao-Lin Zhao
Summary: This study investigated the age, growth, and population structure of S. oualaniensis in the northwest Indian Ocean. The results showed that there were significant differences in growth between sexes, and the growth rate of S. oualaniensis in 2019 was faster than that in 2020. This study provides important information for the assessment and sustainable development of S. oualaniensis.
Article
Fisheries
Marco Quispe-Machaca, Fabian A. Guzman-Rivas, Christian M. Ibanez, Angel Urzua
Summary: Studies on the marine trophodynamics of jumbo squid Dosidicus gigas in the Humboldt Current System have revealed that the species primarily feeds on fish, crustaceans, and squids. The analysis of fatty acids showed that the digestive gland has the highest concentration and diversity of fatty acids, followed by the gonad and mantle. During the cold season, individuals of D. gigas may optimize their energy intake by consuming prey rich in polyunsaturated fatty acids.
FISHERIES RESEARCH
(2022)
Article
Nutrition & Dietetics
Rosa Campos-Guerrero, Xiomara Genoveva Diaz-Molina, Rodrigo Vargas-Fernandez, Diego Azanedo
Summary: In this study, data from the 2019 Demographic and Family Health Survey in Peru was used to investigate the association between women's autonomy and childhood anemia in children under five years of age. The prevalence of childhood anemia was 30.4%, and the proportions of low, moderate, and high autonomy among mothers were 44.5%, 38.4%, and 17.1%, respectively. The findings showed that children of women with low autonomy were more likely to have anemia.
Article
Fisheries
Huajie Lu, Ziyue Chen, Kai Liu, Yuzhe Ou, Maolin Zhao, Tianzi Sun
Summary: This study estimated the age, growth, and population structure of purpleback flying squid in the South China Sea through the analysis of its statolith microstructure. The results revealed fast growth and distinct gender differences in growth patterns for this species. The study also provided valuable information for the fishery biology, ecology, and resource management of purpleback flying squid in the South China Sea.
Article
Environmental Sciences
Jiaqi Wang, Xiaodi Gao, Jessica Chen, Xiaojie Dai, Siquan Tian, Yong Chen
Summary: This paper evaluates the impact of different observer coverage rates and sampling designs on the estimation of total catch in Chinese tuna longline fisheries in the Pacific Ocean through computer simulation. The study found that increasing observer coverage rate improves the accuracy of catch estimates, and that using a stratified sampling design based on target species leads to more accurate results.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Ecology
Qiuyun Ma, Siquan Tian, Dongyan Han, Kindong Richard, Chunxia Gao, Weicheng Liu
Summary: The study analyzed the growth and maturity characteristics of Big head croaker (BC), Large yellow croaker (LC), and Yellow croaker (YC) based on samples collected from 2015 to 2018 in the southern East China Sea. Results showed that females tend to have higher weight at the same length and mature earlier compared to males, and individuals gained more weight in spring and fall. The methodology used in the study can provide insights on the growth and maturity of these three important species in the East China Sea.
REGIONAL STUDIES IN MARINE SCIENCE
(2021)
Article
Biodiversity Conservation
Jiaqi Wang, Chunxia Gao, Feng Wu, Xiaodi Gao, Jessica Chen, Xiaojie Dai, Siquan Tian, Yong Chen
Summary: In the Pacific Ocean, the bycatch and discard patterns of Chinese tuna longline fleets were analyzed using observer data. Other bony fishes and sharks were the most common bycatch species, and the bigeye tuna fleet had higher bycatch and discard rates compared to the albacore fleet. Bycatch of marine turtles and mammals mainly occurred in the Tropical Pacific, while seabird bycatch was more common in the Temperate Pacific.
BIOLOGICAL CONSERVATION
(2021)
Article
Ecology
Shaoqin Wang, Xuefang Wang, Liuxiong Xu, Siquan Tian
Summary: Possible changes in feeding habits and trophic niche width of rainbow runner were investigated using stomach content analysis and stable isotope analysis. The results indicated that different size classes of rainbow runner may have different feeding ecology and prey preferences.
ENVIRONMENTAL BIOLOGY OF FISHES
(2022)
Article
Fisheries
Yan Wang, Peiwu Han, Xinjun Chen, Zhou Fang
Summary: This study used stable isotope analysis to investigate the interannual and ontogenetic stage variation in trophic ecology of Ommastrephes bartramii. The results showed significant differences in delta C-13 and delta N-15 values of beaks between different years and ontogenetic stages. The overlap rate between different years varied, with the highest rate observed between 2012 and 2016. The findings suggest that the marine environment during the El Nino event in 2015 negatively affected the growth of prey organisms and the feeding behavior of O. bartramii, resulting in a narrower isotope niche.
FISHERIES RESEARCH
(2022)
Article
Fisheries
Ousmane Sarr, Richard Kindong, Siquan Tian, Fambaye Ngom Sow, Momar Ka, Ousmane Niang Seye
Summary: The coasts of Senegal have abundant fishery resources due to the frequent occurrence of intense upwelling systems. Fishing is a vital activity for Senegal, playing an important role in the country's socioeconomic plans and food security. This review provides an update on the Senegalese marine fisheries from 1999 to 2018, discussing the political environment and management measures taken to protect exploited species. The study reveals the dynamic and significant contribution of the Senegalese fishing sectors to the country's economic growth. However, it also highlights increasing catches, economic value, and illegal fishing practices in the marine fisheries sector. The review identifies the main challenges faced by the fisheries sector and suggests recommendations to address them, including the application of new assessment methods suitable for data-poor fisheries.
REVIEWS IN FISHERIES SCIENCE & AQUACULTURE
(2023)
Article
Agriculture, Dairy & Animal Science
Richard Kindong, Feng Wu, Siquan Tian, Ousmane Sarr
Summary: Blue shark species have been declining due to overfishing, and their stock status was evaluated using a new assessment model (CMSY++) in the South Atlantic. The results indicate that the blue shark stock may be witnessing overfishing and is being overfished. The use of different catch time series and priors had varying effects on the output results of the model.
Article
Environmental Sciences
Peiwu Han, Zhou Fang, Nan Li, Xinjun Chen
Summary: This study analyzed the migration route of Ommastrephes bartramii in the North Pacific Ocean using statolith microchemistry, revealing differences in element composition and concentration between different seasons. By applying Bayesian model and random forest method, the study predicted the optimal squid location and potential migration routes in the ocean.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Oceanography
Nan Li, Yan Wang, Zhou Fang, Xinjun Chen, Zhiping Feng
Summary: This study explored the spawning season, growth patterns, and relationship with the environment of Swordtip squid (Uroteuthis edulis) in the East China Sea. The study found that the spawning season of U. edulis is nearly one year, with two peak periods in spring and summer. The growth of different groups was significantly affected by seasonal changes in water temperature, current velocity, and prey abundance.
ACTA OCEANOLOGICA SINICA
(2022)
Article
Environmental Sciences
Wang Qian, Lu Dequan, Xiong Yiran, Peng Fei, Li Juan-ying, Wu Feng, Chu Yanping, Sun Ruihua, Tian Siquan
Summary: This study analyzed the levels of PAHs in various coastal marine seafood in the Wentai fishing area and identified the sources of these PAHs. The results showed that the PAHs in the seafood were mainly derived from fossil fuel sources. The study also assessed the behavior of PAHs in the food chain and their association with dietary risk. It was found that the area had a relatively short food chain and higher trophic magnification factors. The highest carcinogenic risk was associated with consuming yellow croaker. Therefore, it is necessary to control the unintentional use of fossil fuels and optimize the energy structure in the nearby terrestrial area to reduce dietary risk.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2022)
Article
Ecology
Yue Jin, Chao Wang, Nan Li, Zhou Fang
Summary: The study focuses on the morphological similarities and species identification of Uroteuthis chinensis and Uroteuthis edulis, two commercially important squids in the Indo-Pacific Ocean fisheries. Using methods like arm sucker ring teeth shape and DNA sequencing, it was found that while these two species are similar, they can be distinguished effectively. The study also highlights the limitations of using Mantle Width (MW) to Mantle Length (ML) ratio for identification, and emphasizes the importance of Principal Component Analysis (PCA) and Step-wise Discriminant Analysis (SDA) in understanding morphological differences among populations from different areas.
REGIONAL STUDIES IN MARINE SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
Chao Wang, Zhou Fang
Summary: This study analyzed the ontogenetic variation and sexual dimorphism of beak shape in Octopus minor, Uroteuthis edulis, Sepia esculenta, and Sthenoteuthis oualaniensis in China's coastal waters using geometric morphometrics methods. The results showed significant differences in beak shape among different ontogenetic stages, and these differences may be related to habitat-driven variation.
Article
Fisheries
Peiwu Han, Jianhua Li, Yating Dan, Bilin Liu, Xinjun Chen, Zhou Fang
Summary: The study found significant differences in mantle length among different years and sexes for the O. bartramii and D. gigas, with females generally larger than males; both squids demonstrated a positive allometric growth pattern influenced by year and sex; significant differences in relative condition factors were found for both squids for different years and sexes, with significant interannual fluctuations.
Article
Marine & Freshwater Biology
Richard Kindong, Feng Wu, Ousmane Sarr, Libin Dai, Siquan Tian, Xiaojie Dai
Summary: Unassessed fisheries, especially non-targeted fisheries, play a critical role in food security in developing countries, but the lack of reliable data makes it difficult to assess their stocks, leading to overfishing and declining yield. This study proposes a framework for determining the life history and management of unassessed fisheries, using wahoo as a case study. It provides a comprehensive methodological approach to estimate life history parameters, evaluate biological reference points, and assess stock status.
OCEANOLOGICAL AND HYDROBIOLOGICAL STUDIES
(2022)
Article
Fisheries
Lu Zhai, Zengguang Li, Yongbin Hu, Chengwei Huang, Siquan Tian, Rong Wan, Daniel Pauly
Summary: This study assessed the stock status and historical changes of Coilia mystus and C. nasus in the Yangtze River Estuary, China, and found that both species are overfished. The maximum lengths and relative biomasses have declined due to increasing fishing pressure.
