Mean hatching time | Negative control | Site 1 | Site 2 | Site 3 | Site 4 |
---|---|---|---|---|---|
May 2011 | 66 hpf | 69 hpf | n.a. | 58 hpf | 79 hpf |
September 2011 | 67 hpf | 63 hpf | n.a. | 69 hpf | 87 hpf |
May 2012 | 72 hpf | 81 hpf | 93 hpf | 81 hpf | 85 hpf |
September 2012 | 68 hpf | 59 hpf | 26% at 96 hpf | 63 hpf | 68 hpf |