Page 251 - 《水产学报》2026年第04期

4 期 郭弘艺，等：长江口及邻近海域刀鲚的季节性时空分布特征 50 卷

表 2 2024—2025 年长江口及邻近海域刀鲚密度与出现率
Tab. 2 Resource density and frequency of occurrence of C. nasus in the Yangtze River Estuary during 2024–2025
年份/年 季节 个体类型 站位数/个 出现率/% 平均密度/(尾/km )
2
year season individual category no. of station frequency of occurrence mean density
2024 1 YOY 55 43.6 251.5 ± 517.0
non-YOY 55 67.3 1 818.7 ± 2 924.6
2 YOY 55 43.6 475.6 ± 1 165.2
non-YOY 55 47.3 462.9 ± 1 568.6
3 YOY 55 54.5 1 135.1 ± 3 137.5
non-YOY 55 67.3 381.8 ± 1 024.9
2025 1 YOY 55 40.0 418.7 ± 935.6
non-YOY 55 76.4 1 541.0 ± 2 589.8
2 YOY 55 54.5 984.8 ± 1 763.9
non-YOY 55 50.9 602.8 ± 1 069.0
3 YOY 55 60.0 1 773.7 ± 2 906.1
non-YOY 55 74.5 588.6 ± 1 142.7
注：平均密度以均值±标准差 (mean ± SD)表示。下同。
Notes: Mean density is expressed as mean ± standard deviation. The same below.

N 春 spring 夏 summer 秋 autumn
32.0°
2024 YOY 2024 YOY 2024 YOY
31.5°
31.0°

30.5°
32.0°
2024 non-YOY 2024 non-YOY 2024 non-YOY
31.5°

31.0°
30.5°
32.0°
2025 YOY 2025 YOY 2025 YOY
31.5°

31.0°
30.5°
32.0°
2025 non-YOY 2025 non-YOY 2025 non-YOY
31.5°

31.0°
30.5°
121° 122° 123° 124° 121° 122° 123° 124° 121° 122° 123° 124° E
密度/(尾/km ) 0 50 100 500 1 000 5 000 10 000
2
density
图 4 2024—2025 年长江口及邻近海域刀鲚当年生与非当年生群体的空间分布
空心圆表示未捕获刀鲚，实心圆面积与资源密度成正比。蓝色表示 YOY；粉色表示 non-YOY。
Fig. 4 Spatial distribution of YOY and non-YOY groups of C. nasus in the Yangtze River Estuary during 2024–2025
Open circles indicate absence; filled circles are proportional to resource density. Blue indicates YOY; pink indicates non-YOY.

中国水产学会主办 sponsored by China Society of Fisheries https://www.china-fishery.cn
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