TABLE 3.
Within-population variance (theta, θ) for each host species at each respective collection sitea
| Host species | Collection site | No. of hosts | Host θ | Symbiont θ |
|---|---|---|---|---|
| S. affinis | Banyuls-sur-Mer | 18 | 0.0292 | 0.0331 |
| Bari | 9 | 0.0220 | 0.0297 | |
| S. intermedia | Banyuls-sur-Mer | 4 | 0.0026 | 0.0055 |
| Bari | 7 | 0.0000 | 0.0082 | |
| S. robusta | Banyuls-sur-Mer | 4 | 0.0000 | 0.0071 |
| Bari | 6 | 0.0000 | 0.0025 | |
| R. minor | Banyuls-sur-Mer | 4 | 0.0184 | 0.0000* |
| Northern Atlantic | 4 | 0.0000 | 0.0000* |
a
Values were calculated only for hosts from which at least two Vibrio or Photobacterium strains were isolated. *, all symbionts are P. leiognathi. Variation among this species was observed only between populations in the Mediterranean versus the North Atlantic (Bay of Biscay).