. Bulletin. Science. \ ⢠- - - ⢠â ⢠0-1â9 P 9 9- > â9-. Fig. 4. Petricola hertzana (a) and Grandidierella japonica (b) densities ( Estuary sampling stations from spring 97 through fall 1999. SE) at three Tijuana sea temperature anomalies characteristic of El Nino events (Morales-Bojorquez and Lopez-Martinez 1999). Petricola hertzana: The bivalve Petricola hertzana (Petricolidae) was first en- countered during summer 1998 in benthic core samples collected at station TE#3, where mean densities reached 145 individuals m2 (Fig. 4a). Since this initial collection date, P. hertzana abundance
. Bulletin. Science. \ ⢠- - - ⢠â ⢠0-1â9 P 9 9- > â9-. Fig. 4. Petricola hertzana (a) and Grandidierella japonica (b) densities ( Estuary sampling stations from spring 97 through fall 1999. SE) at three Tijuana sea temperature anomalies characteristic of El Nino events (Morales-Bojorquez and Lopez-Martinez 1999). Petricola hertzana: The bivalve Petricola hertzana (Petricolidae) was first en- countered during summer 1998 in benthic core samples collected at station TE#3, where mean densities reached 145 individuals m2 (Fig. 4a). Since this initial collection date, P. hertzana abundance has generally decreased, although the spe- cies continues to persist at low densities (â35 individuals m2) at this site. During. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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