Inter-annual variability in growth and maturation of the swordtip squid Uroteuthis edulis in Yilan Bay off northeastern Taiwan

Chen, Jingyu; Ching, Tzu-Yun; Chen, Chih-Shin

doi:10.51400/2709-6998.2573

Cited by 5 publications

(2 citation statements)

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“…The interannual variations in the Yangtze River runoff in summer are related to the input of terrestrial freshwater and nutrient concentration, and the diffusion affects the trophic levels and habitats of paralarvae [ 2 , 6 , 15 ]. In summer, the Taiwan warm current mainly originates from the Taiwan Strait water and the surface water (subsurface) of the Kuroshio warm current, which exhibits the characteristics of high temperature and low salinity [ 8 , 44 ]. Moreover, the interannual variations in the Kuroshio intrusion paths and the water flow in the Taiwan Strait jointly affect the distribution and physicochemical characteristics of Taiwan warm current (inshore branch) at different water layers [ 8 ]; therefore, the physical driving sources of the Yangtze River runoff and the Taiwan warm current (inshore branch) determine the transport direction of the summer stock, and the dynamic interannual variations in each component current system affect the transport distance.…”

Section: Discussionmentioning

confidence: 99%

Early Transport Patterns and Influencing Factors of Different Stocks of Uroteuthis edulis in the East China Sea

Li,

Xing,

Feng

et al. 2024

Animals

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Uroteuthis edulis (U. edulis) is an important economic loliginid resource in the East China Sea (ECS). Its flexible life history traits enable the population to quickly adapt to changes in habitat. Understanding the early transport process helps us to grasp the habitat requirements of populations at key life history stages. In this study, particle tracing was used to simulate the early transport trajectories (within 120 days). The gradient forest method (GFM) and generalized additive mixed models (GAMMs) were used to analyze the key environmental variables that affect the early transport trajectories and the impact of environmental factors on the transport process, respectively. The results showed that spring stock tracers were transported to the northeast of the release area (Pengjiayu water) and the Pacific side of Japan. Summer stock tracers were transported to the north and northeast of the release area (Zhoushan island). Current velocity, salinity, and temperature were key environmental variables that affected the trace element ratios of spring stock at early life history stages. Mixed-layer depth (MLD), velocity, and chlorophyll a concentration (Chla) were key environmental variables for summer stock. Zonal velocity was positively correlated with the trace element ratio for spring and summer stock (0.14–0.16 m/s), while the meridional velocity showed an opposite correlation. The physical driving mechanisms of the Kuroshio warm current (or the Taiwan warm current) and the Yangtze River determine the paralarva retention location during early transportation. The differences in the dominant factors of the water environment in the retention area may affect the paralarva physiological functions and food availability. This study provides a scientific basis for a comprehensive understanding of the migration characteristics of U. edulis with different stocks.

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Section: Discussionmentioning

confidence: 99%

Early Transport Patterns and Influencing Factors of Different Stocks of Uroteuthis edulis in the East China Sea

Li,

Xing,

Feng

et al. 2024

Animals

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“…The age estimation and growth analyses can provide important information on population structure and growth difference (Arkhipkin, 2005; Li et al, 2022). Cephalopod statoliths (hard structure) have unique spatiotemporal inversion properties and are good carrier for recording individual growth (Arkhipkin et al, 2018; Chen et al, 2022). Statolith microstructural information (daily increment and width) is widely used to reveal population structure, growth patterns, growth rates, and relationship between growth and environmental factors (Jackson et al, 1997; Li et al, 2022; Lipinski et al, 2016; Pecl, Moltschaniwskyj, et al, 2004; Sajikumar et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Ontogenetic growth responses to the environmental changes of the swordtip squid (Uroteuthis edulis) spring stock in the East China Sea

Li,

Han,

Chen

et al. 2024

Fisheries Oceanography

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Swordtip squid (Uroteuthis edulis) is characterized by a complex population structure and rapid generation renewal and sensitive to habitat changes. Its population growth response to environmental variations implies its flexible life history traits. In this study, with the samples collected in the north‐central waters of the East China Sea from 2017 to 2021, the daily growth of the spring stock was analyzed based on the age and increment width of statolith. The gradient forest method (GFM) and generalized additive mixed models (GAMMs) were used to explore the changes in the weights of environmental variables and the relationships between daily growth and environmental variables in various growth stages. The age of the samples collected from 2017 to 2021 mainly ranged from 180 to 240 days, and the spring stock was the dominant stock. According to the distance from daily increment to core in the statolith, the life history of the spring stock was divided into four growth stages (S1 embryo–larval stage, S2 juvenile stage, S3 subadult stage, and S4 adult stage). For the spring stock, the cumulative weight of temperature and salinity in the population growth was the largest in S1 stage; the cumulative weight of temperature and velocity was the largest in S2 stage; the cumulative weight of temperature was the largest in S3 stage; and the cumulative weight of mixed layer depth (MLD), temperature, and salinity was the largest in S4 stage. The relationship between temperature at the depth of 25 m (T25) and daily growth of the spring stock was first positively correlated (S1–S2), then negatively correlated (S3), and finally positively correlated (S4). The relationship between environment variable and growth of the spring stock gradually decreased with the increase in MLD (30 to 50 m) and SSS (S3–S4, 32.2‰ to 33.2‰) and gradually increased with the increase in the velocity of currents (S1, .1 to .2 m/s). The differences in the responses of the spring stock to environmental variations in different growth stages may lead to the changes in the growth traits for the spring stock. This study provides a scientific basis for a comprehensive understanding of the life history traits of U. edulis.

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Relationship between Individual Growth and Environmental Factors of Uroteuthis Edulis in the East China Sea

Li,

Han,

Chen

et al. 2023

Preprint

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Inter-annual variability in growth and maturation of the swordtip squid Uroteuthis edulis in Yilan Bay off northeastern Taiwan

Cited by 5 publications

References 0 publications

Early Transport Patterns and Influencing Factors of Different Stocks of Uroteuthis edulis in the East China Sea

Early Transport Patterns and Influencing Factors of Different Stocks of Uroteuthis edulis in the East China Sea

Ontogenetic growth responses to the environmental changes of the swordtip squid (Uroteuthis edulis) spring stock in the East China Sea

Relationship between Individual Growth and Environmental Factors of Uroteuthis Edulis in the East China Sea

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