TABLE S–2. Species, Prey and Numbers of Specimens: Bahía de los Ángeles, Islands, BC, México (1992-2001 data from Bertsch, 2007, and pers. obser.)

Acanthodoris pina                  Br                     1

Aeolidiella chromosoma         Cn                    10

Aplysia californica                 He                    1

Aplysia parvula                      He                    1

Bajaeolis bertschi                   Cn                    2

Berthellina ilisima                  Uk                    73

Bulla gouldiana                      He                    1

Chromodoris marislae           Sp                    3

Chromodoris norrisi               Sp                    2

Dendodoris fumata                 Sp                    19

Dendrodoris stohleri              Sp                    2

Dirona picta                           Br                     1

Discodoris ketos                     Sp                    8

Doriopsilla albopunctata       Sp                    2

Doto lancei                             Cn                    1

Elysia diomedea                     He                    11

Eubranchus cucullus              Cn                    1

Eubranchus rupium                Cn                    1

Flabellina telja                       Cn                    2

Geitodoris mavis                    Sp                    1

Glossodoris baumanni            Sp                    1

Glossodoris dalli                    Sp                    1

Hermissenda crassicornis      Cn                    1

Hypselodoris ghiselini            Sp                    11

Janolus barbarensis               Br                     2

Limacia janssi            Br                     3

Limenandra nodosa                Cn                    1

Navanax inermis                     Op                    6

Navanax polyalphos               Op                    1

Noumeaella rubrofasciata      Cn                    6

Okenia angelica                     Br                     2

Phestilla lugubris                   Cn                    2

Phidiana lascrucensisCn                    9

Phyllaplysia padinae              He                    3

Pleurobranchus areolatus      As                    1

Polycera alabe                       Br                     7

Polycera hedgpethi                 Br                     3

Red dorid                                Sp                    1

Roboastra tigris                      Op                    17

Tambja abdere                       Br                    226

Tambja eliora                         Br                    184

Taringa aivica            Sp                    2

Trapania goslineri                  Uk                    3

Triopha catalinae                   Br                     2

Tritonia sp. nov.                     Cn                    13

Tyrinna evelinae                     Sp                    4

Yellowish dorid                      Sp                    1

Key for Prey Items:

As       Ascidians

Br        Bryozoans

Cn       Cnidarians

He       Herbivores

Op       Opisthobranchs

Sp       Sponges

Uk       Unknown

Time:              52.64 hrs

Species:          47        (1.12/hr)

Specimens:     656      (12.46/hr)

            All Opisthobranchs                                                  Nudibranchs Only

            Specimens      Species           %                    Specimens      Species           %

As       1                      (1)                   ---                    ---                    ---                    ---

Br        431                  (10)                 65.6%             431                  (10)                 77%

Cn       49                    (12)                 7%                  49                    (12)                 8.8%

He       17                    (5)                   2.6%               ---                    ---                    ---

Op       24                    (3)                   3.7%               17                    (1)                   3%

Sp       58                    (14)                 8.8%               58                    (14)                 10.4%

UK      76                    (2)                   11.6%             3                      (1)                   ---