TABLE 1

Median temperature, salinity, and vibrio levels in shellfish from Long Island Sound over the study perioda

Sampling date (2012)nbTemp (°C)Salinity (ppt)Level (log MPN/g)
V. choleraeV. vulnificusTotal V. parahaemolyticustdh+V. parahaemolyticustrh+V. parahaemolyticus
16 July1123.8 (22.9–24.3)25.5 (25.4–25.7)−0.82 (−0.82 to −0.44)0.36 (−0.82–2.6)1.88 (0.97–3.18)0.18 (−0.82–1.63)0.30 (−0.82–1.88)
23 July5NDcND<LODd−0.04 (−0.82–1.15)1.88 (0.88–2.18)−0.82 (−0.82 to −0.44)−0.44 (−0.82–0.36)
30 July1023.1 (22.0–23.5)26.2 (26.0–26.5)<LOD0.63 (−0.82–1.36)1.36 (0.18–2.36)−0.24 (−0.82–0.63)−0.24 (−0.82–0.63)
6 August1925.1 (22.6–26.0)25.8 (25.2–26.0)−0.82 (−0.82 to −0.44)0.88 (−0.82–3.32)2.18 (0.36–3.97)−0.82 (−0.82–1.63)−0.44 (−0.82–1.36)
13 August823.1 (22.5–24.5)25.9 (25.6–26.1)<LOD0.72 (−0.44–1.58)2.02 (1.18–2.63)−0.82 (−0.82 to −0.04)−0.63 (−0.82–0.58)
4 September1024.5 (23.8–24.7)26.8 (26.2–27.3)<LOD0.97 (−0.44–2.58)1.97 (0.63–2.88)−0.44 (−0.82–0.63)−0.44 (−0.82–0.63)
10 September823.7 (23.5–23.8)26.1 (26.9–26.1)<LOD1.63 (1.36–2.97)2.32 (1.63–2.46)−0.82 (−0.82 to −0.04)−0.44 (−0.82–0.96)
11 September1023.1 (22.4–23.2)27.0 (22.8–27.6)−0.82 (−0.82–0.56)1.14 (−0.14–2.36)1.47 (0.30–3.36)−0.82 (−0.82 to −0.52)−0.82 (−0.82 to −0.52)
18 September1022.5 (22.5–22.7)27.4 (27.4–27.7)<LOD1.63 (−0.13–2.18)1.51 (0.88–2.32)−0.82 (−0.82 to −0.44)−0.82 (−0.82–0.36)
24 September720.40 (20.2–21.2)26.0 (25.8–26.1)<LOD15.8 (0.36–2.36)2.08 (1.36–2.63)−0.82 (−0.82–0.15)−0.82 (−0.82–0.15)
  • a Values are reported as median levels (range) from all independent shellfish samples collected on that date.

  • b n, number of independent shellfish samples collected.

  • c No temperature or salinity data were available for the 23 July sampling.

  • d <LOD indicates all shellfish samples were below the limit of detection. For observations of Vibrio sp. levels of <LOD, the value of 1/2 the LOD was substituted.