TABLE S–3. Species, Prey and Numbers of Specimens: Bahía de los Ángeles, Punta la Gringa/Cuevitas, BC, México (1992-2001 data from Bertsch, 2007, and pers. obser.)

 Acanthodoris pina                              Br                     11

Acanthodoris rhodoceras                   Br                     2

Aegires albopunctatus            Sp                    4

Aeolidiella chromosoma                     Cn                   268

Aplysia californica                             He                    64

Aplysia parvula                                  He                    20

Aplysia vaccaria                                 He                    1

Bajaeolis bertschi                               Cn                    46

Berghia major                        Cn                    3

Berthella stellata                                Uk                    7

Berthellina ilisima                              Uk                   297

Bornella sarape                                  Cn                    1

Bulla gouldiana                                  He                    9

Chromodoris galexorum                    Sp                    1

Chromodoris marislae                       Sp                    2

Chromodoris norrisi                           Sp                    32

Cuthona yellow sp. nov.                     Cn                    6

Dendrodoris fumata                           Sp                   272

Dendrodoris stohleri                          Sp                    1

Dendronotid                                       Cn                    1

Diaulula sp. nov.                                Sp                    1

Dirona picta                                       Br                     5

Discodoris ketos                                 Sp                    93

Dorid spp. (?)                        Sp                    4

Doriopsilla albopunctata                   Sp                   311

Doriopsilla gemela                             Sp                   1230

Doriopsilla janaina                            Sp                    19

Doris pickensi                         Sp                    21

Doto kya                                             Cn                    2

Doto lancei                                         Cn                    5

Doto sp.                                              Cn                    1

Elysia diomedea                                 He                   2041

Elysia hedgpethi                                 He                    3

Eolid spp. (?)                                     Cn                    8

Eubranchus cucullus                          Cn                    1

Eubranchus misakiensis                     Cn                    1

Favorinus elenalexiarum                    OE                   1

Flabellina cynara                               Cn                    8

Flabellina iodinea                              Cn                    49

Flabellina telja                                   Cn                    4

Geitodoris mavis                                Sp                    1

Glossodoris baumanni                        Sp                    2

Glossodoris dalli                                Sp                    2

Haminoea sp.                                     He                    3

Hermissenda crassicornis                  Cn                    66

Histiomena convolvula                       Cn                    278

Hypselodoris californiensis                Sp                    10

Hypselodoris ghiselini                        Sp                    16

Janolus barbarensis                           Br, Cn              5

Limacia janssi                                   Br                     6

Limenandra nodosa                            Cn                    13

Mahogany dorid                                 Sp                    1

Melibe leonina                                    Cr                     8

Mexichromis tura                               Sp                    1

Navanax aenigmaticus                       Op                    3

Navanax inermis                                 Op                    52

Navanax polyalphos                           Op                    72

Okenia angelica                                 Br                     74

Peltodoris lancei                                Sp                    2

Peltodoris sp. nov.                              Sp                    1

Phestilla lugubris                               Cn                    113

Phidiana lascrucensis            Cn                    189

Phyllaplysia padinae                          He                    55

Pleurobranchus areolatus                  As                    3

Polycera alabe                                   Br                     13

Polycera hedgpethi                             Br                     17

Polycerella glandulosa                       Br                     29

Reddish dorid sp.                                Sp                    3

Rostanga pulchra                               Sp                    7

Sclerodoris tanya                               Sp                    1

Tambja abdere                                   Br                     3

Tambja eliora                                     Br                     6

Taringa aivica                        Sp                    20

Thordisa sp.                                        Sp                    4

Trapania goslineri                              Uk                    16

Tritonia pickensi                                 Cn                    6

Tritonia sp.nov.                                  Cn                    75

Tyrinna evelinae                                 Sp                    51

10–year study at Punta la Gringa and Cuevitas (1992-2001)

Total species: 78 (14 non-nudibranch)

Total specimens: 6088 (nudibranch: 3458)

Total search time: 229.3 hours

Specimen density throughout the entire 10–year study period: 26.55 specimens per hour

            Nudibranch specimen density: 15.08/hr

Species density throughout the entire 10–year study period: 0.345 species per hour

            Nudibranch species density:   0.283/hr

                         All Opisthobranchs                                      Nudibranchs only

                        Specimens      Species           %                    Specimens      Species           %

As                   3                      (1)                   ---                    ---                    ---                    ---

Br                    171                  (11)                 2.8%               171                  (11)                 4.9%

Cn                   1149                (23)                 18.9%             1149                (23)                 33.2%

Cr                    8                      (1)                   ---                    8                      (1)                   ---

He                   2196                (8)                   36%                ---                    ---                    ---

OE                  1                      (1)                   ---                    1                      (1)                   ---

Op                   127                  (3)                   2%                  ---                    ---                    ---

Sp                   2113                (28)                 34.7%             2113                (28)                 61.1%

UK                  320                  (3)                   5.3%               16                    (1)                   ---

TOTALS:       6088                (79)                                         3458                (65)

As, Ascidians; Br, Bryozoans; Cn, Cnidarians; Cr, Crustaceans; He, Herbivores; OE, Opisthobranch Eggs; Op, Opisthobranchs, Sp, Sponges; UK, Unknown