Seasonal Mortality of Wild Atlantic Menhaden (Brevoortia tyrannus) Is Caused by a Virulent Clone of Vibrio (Listonella) anguillarum; Implications for Biosecurity along the Atlantic Coastal United States
Table 2
Summary of menhaden collection dates, locations, sample sizes, water quality, and fish biological data.
Date
Collection location
# Fish sampled
Water temp (°C)
DO (mg/L)
Mean TL ± SD (range) (cm)
Mean weight ± SD (range) (g)
Mean k-factor (range)
Dec 01, 2020
Liberty St Park (1)
30
11.5
9.0
29 ± 1.9 (24.5–33)
229 ± 32.6 (176–313)
0.92 (0.8–1.18)
Mar 30, 2021
Navesink River (2)
5
32.4 ± 1.2 (31–34)
292 ± 11.5 (287–313)
0.89 ± .08 (0.81–1.0)
Mar 30, 2021
Natco Lake (3)
7
33.4 ± 1.9 (31.3–36)
301 ± 22.7 (284–329)
0.82 ± 0.1 (0.72–1.0)
Apr 13, 2021
Great South Bay (4)
8
12.3 ± 0.5
7.6 ± 0.7
29 ± 1.5 (26.7–30.6)
Apr 22, 2021
Natco Lake (3)
6
10.8
8.0
30.8 ± 3.2 (24.5–32.5)
282 ± 54.5 (231–377)
0.80 ± 0.07 (0.71–0.87)
Apr 22, 2021
Navesink River (2)
6
11.0
8.0
32.5 ± 1.9 (30.3–35.5)
296 ± 40.1 (280–345)
0.86 ± 0.06 (0.85–0.93)
Apr 26, 2021
Shrewsbury River (5)
10
13.0
9.6
32.4 ± 1.9 (32–34.8)
308 ± 58.2 (252–391)
0.93 ± 0.09 (0.80–1.10)
Apr 26, 2021
Navesink River (2)
10
12.8
10.2
32.5 ± 1.2 (30.8–33.8)
294 ± 36.9 (235–339)
0.86 ± 0.1 (0.61–0.99)
May 10, 2021
Freeport Creek (6)
3
∼ 16.9
∼ 7.2
27.6 ± 2 (26.2–30)
May 12, 2021
Peconic River (7)
3
15.8
8
29.3 ± 0.2 (29.2–29.5)
May 12, 2021
Navesink River (2)
1
15.0
36
421
0.90
May 12, 2021
Shrewsbury River (5)
5
15.0
33.5 ± 1.4 (32–35.5)
289 ± 50.8 (220–347)
0.76 ± 0.08 (0.67–0.84)
May 17, 2021
Delaware Bay (8)
7
17.6
8.5
32.2 ± 1.8 (30.5–35.5)
251 ± 33.4 (212–313)
0.77 ± 0.05 (0.70–0.83)
Dec 28, 2021
Mill Pond, Mullica River (9)
5
6.5
9.8
27.9 ± 2.3 (25.5–30.5)
198.9 ± 37 (160.3–243.5)
0.91 ± 0.07 (0.85–0.98)
All collections were of moribund fish from mortality events in 2020 and 2021. Collection location numbers correspond to the map in Figure 1. Dissolved oxygen (DO), total length (TL), standard deviation (SD), condition factor (k-factor), and data not available ().
