Table 2.
Behavioral reactions of Phidiana hiltoni to test nudibranchs
| Test species | Reaction of P. hiltoni | ||||||
|---|---|---|---|---|---|---|---|
| Withdraw, Turn | Withdraw | Neutral | Repeat contact | Attack and ingest | |||
| Whole | Part | Fail | |||||
| Doridina | |||||||
| Triopha maculata (4, 8) | 5 | 3 | |||||
| Ancula gibbosa (4, 5) | 1 | 4 | |||||
| Dendronotina | |||||||
| Doto columbiana (7, 7) | 6 | 1 | 0 | ||||
| Doto form A (4, 6) | 3 | 3 | 0 | ||||
| Doto amyra (6, 8) | 2 | 3 | 3 | 0 | |||
| Tritonia myrakeenae (4, 9)a | 3 | 3 | 2 | 1 | 0 | ||
| Doto kya (6, 10) | 2 | 1 | 1 | 6 | 0 | 0 | |
| Dendronotus venustus (6, 7) | 1 | 1 | 1 | 4 | 0 | 0 | |
| Dendronotus subramosus (1, 1) | 1 | ||||||
| Arminina | |||||||
| Dirona picta (1, 2) | 2 | ||||||
| Aeolidina | |||||||
| Aeolidia papillosa (3, 3) | 2 | 0 | 1 | ||||
| Cuthona divae (3, 3) | 1 | 2 | 0 | ||||
| Cuthona albocrusta (6, 7) | 1 | 6 | 0 | 0 | |||
| Aeolidiella chromosoma (2, 4)a | 1 | 0 | 3 | 0 | |||
| Cuthona flavovulta (4, 8) | 3 | 1 | 2 | 1 | 0 | 1 | |
| Eubranchus rustyus (3, 6) | 2 | 1 | 1 | 2 | 0 | ||
| Flabellina trilineata (3, 10) | 8 | 2 | 0 | 0 | |||
| Flabellina cf. trilineata (3, 6)b | 4 | 1 | 1 | 0 | 0 | ||
| Hermissenda crassicornis (10, 31) | 23 | 2 | 2 | 2 | 1 | 1 | |
| Cuthona lagunae (6, 11) | 9 | 1 | 1 | ||||
| Eubranchus rupium (1, 2) | 2 | ||||||
Shown are number of trials in which P. hiltoni reacted according to five categories of behavior, ranging from adversely (left), to attacking (right). If attacked, test slugs were ingested whole or in part, or escaped. Forty-eight P. hiltoni were used in 154 total trials. Numbers in parentheses after test species are number of individuals of that species used, and total number of trials conducted using that species
aSpecies does not occur as far north as Duxbury Reef
bUnlike F. trilineata, this form has smooth to slightly wrinkled rhinophores, and on the body has three white longitudinal bands of irregular width. It appears to be an undescribed species