Sustainable Exploitation of Dominant Fishes in the Largest Estuary in Southeastern China
Abstract
:1. Introduction
2. Material and Method
2.1. Ethical Statement
2.2. Study Area, Sampling, and Dominant Species
2.3. LBB Modeling
3. Results
3.1. Relative Importance and Length Frequency of the Fishes
3.2. Current Exploitation Status of the Fishes
4. Discussion
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Conflicts of Interest
References
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Species | Spring | Summer | Autumn | Winter |
---|---|---|---|---|
Coilia mystus | 516.0 | 6.9 | 506.2 | 6086.6 |
Collichthys lucidus | 709.5 | 5.7 | 579.1 | 3693.1 |
Amblychaeturichthys hexanema | 867.5 | 12.0 | 703.4 | 506.2 |
Secutor ruconius | 1866.3 | 831.1 | 224.1 | 231.2 |
Cynoglossus abbreviatus | 1440.1 | 223.8 | 334.3 | 1878.5 |
Polydactylus sextarius | - | 6502.4 | 3208.8 | - |
Harpodon nehereus | 155.2 | 2222.5 | 4211.9 | 2413.6 |
Variables | Coilia mystus | Collichthys lucidus | Amblychaeturichthys hexanema | Secutor ruconius | Cynoglossus abbreviatus | Polydactylus sextarius | Harpodon nehereus |
---|---|---|---|---|---|---|---|
quantity | 2104 | 1355 | 1175 | 968 | 897 | 805 | 487 |
length range | 47–235 | 22–205 | 36–190 | 21–107 | 72–350 | 29–284 | 50–350 |
L∞ by user (mm) | 234.0 [16,35] | 213.0 [36] | 174.0 [37] | 101.0 [38] | 329.0 [16] | 300.0 [39] | 323.0 [16,21] |
L∞ by LBB (mm) | 239.0 | 214.0 | 180.0 | 104.0 | 323.0 | 305.0 | 314.0 |
Lc (mm) | 147.6 | 174.0 | 83.4 | 72.0 | 117.6 | 65.0 | 156.0 |
M/K | 1.71 | 1.42 | 1.50 | 2.07 | 1.10 | 1.30 | 1.27 |
F/K | 1.30 | 17.00 | 2.10 | 0.95 | 1.10 | 11.00 | 0.67 |
Z/K | 3.01 | 18.40 | 3.60 | 3.02 | 2.20 | 12.30 | 1.94 |
F/M | 0.78 | 12.00 | 1.40 | 0.48 | 0.98 | 7.40 | 0.55 |
E (i.e., F/Z) | 0.43 | 0.92 | 0.58 | 0.31 | 0.50 | 0.89 | 0.35 |
Lmean (mm) | 168.0 | 185.0 | 107.0 | 77.5 | 181.0 | 127.0 | 202.0 |
Lopt (mm) | 152.0 | 144.0 | 119.0 | 62.0 | 235.0 | 205.0 | 222.0 |
Lmean/Lopt | 1.10 | 1.30 | 0.88 | 1.30 | 0.72 | 0.47 | 0.89 |
Lc_opt (mm) | 123.0 | 140.0 | 103.0 | 48.0 | 196.0 | 197.0 | 174.0 |
Lc/Lc_opt | 1.20 | 1.20 | 0.81 | 1.50 | 0.60 | 0.33 | 0.90 |
B/B0 | 0.47 | 0.08 | 0.25 | 0.64 | 0.30 | 0.01 | 0.51 |
B/B0 (when F = M) | 0.357 | 0.367 | 0.364 | 0.345 | 0.383 | 0.368 | 0.377 |
B/Bmsy | 1.30 | 0.21 | 0.68 | 1.90 | 0.79 | 0.03 | 1.40 |
Y′/R | 0.0300 | 0.0180 | 0.0440 | 0.0140 | 0.0640 | 0.0007 | 0.0480 |
status [40] | healthy | collapsed | overfished | healthy | overfished | collapsed | healthy |
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Wang, L.; Lin, L.; Li, Y.; Xing, Y.; Kang, B. Sustainable Exploitation of Dominant Fishes in the Largest Estuary in Southeastern China. Water 2020, 12, 3390. https://doi.org/10.3390/w12123390
Wang L, Lin L, Li Y, Xing Y, Kang B. Sustainable Exploitation of Dominant Fishes in the Largest Estuary in Southeastern China. Water. 2020; 12(12):3390. https://doi.org/10.3390/w12123390
Chicago/Turabian StyleWang, Linlong, Li Lin, Yuan Li, Yankuo Xing, and Bin Kang. 2020. "Sustainable Exploitation of Dominant Fishes in the Largest Estuary in Southeastern China" Water 12, no. 12: 3390. https://doi.org/10.3390/w12123390