Table 1.
External gross morphometric parameters of perchlorate treated and control fish (0 ppm). No morphometric analyses revealed a significant difference in any parameter based on perchlorate treatment. n = 24–36 per treatment. Juvenile age ranges from 84 to 250 dpf. Adult age ranges from 251 to 350 dpf. SL and mass are measured variables, dorsal spine and anal spine are averaged counts of number of spines present, Lt and Rt plates are total counts of lateral plates on the left (Lt) and right (Rt) sides of the body, pigment score is based on a predetermined rubric scoring melanocyte density (1 is least dense, 5 is most dense), occurrence of exophthalmia, intersex, are rated as Yes (Y), or No (N).
| Age class | (ppm) | SL (mm) | Mass (g) | Dorsal Spine | Anal spine | Rt plates | Lt plates | Pigment score different from controls |
Frequent exopthalmia |
Inter sex |
|---|---|---|---|---|---|---|---|---|---|---|
| Juvenile | 0 | 12.8 (2.0) | 0.03 (0.1) | 2.08 (0.3) | 0.75 (0.1) | 12.8 (2.5) | 12.8 (2.6) | - | N | N |
| Juvenile | 10 | 9.7 (1.7) | 0.06 (0.1) | 1.83 (0.3) | 0.59 (0.1) | 9.7 (2.0) | 9.7 (2.1) | N | N | N |
| Juvenile | 30 | 9.0 (1.5) | 0.04 (0.1) | 2.28 (0.2) | 0.8 (0.1) | 9.0 (1.8) | 9.0 (1.8) | N | N | N |
| Juvenile | 100 | 7.5 (1.5) | 0.09 (0.1) | 2.08 (0.2) | 0.69 (0.1) | 7.3 (1.8) | 7.5 (1.8) | N | N | N |
| Adult | 0 | 34.2 (2.1) | 0.64 (0.1) | 2.83 (0.3) | 1.0 (0.1) | 23 (2.4) | 24 (2.4) | - | N | N |
| Adult | 10 | 34.3 (1.8) | 0.57 (0.1) | 3.0 (0.3) | 1.0 (0.1) | 23 (2.1) | 23 (2.1) | N | N | N |
| Adult | 30 | 33.8 (2.0) | 0.57 (0.1) | 3.0 (0.3) | 1.0 (0.1) | 23 (2.3) | 23 (2.4) | N | N | N |
| Adult | 100 | 32.6 (1.5) | 0.76 (0.1) | 3.0 (0.3) | 1.0 (0.1) | 22 (2.4) | 23 (2.4) | N | N | N |