February 1993 
ADULT EDUCATION 
UNDISCOVERED TREASURES 
OF THE MENDOCINO COAST 
The Mendocino coast is an 
excellent place to study the 
marine biology and coastal 
ecology of Northern California. 
The major emphasis of this 
weekend biology adventure is 
to explore exceptional areas 
where tourists are few. 
Instructor Joe Mueller knows 
almost every nook and cranny 
of this area and will lead a full 
moon hike to call in predators 
of the night. 
March 6-7 (Sat. & Sunday) 
Cost: $75 members/ 
$85 non-members 
SURVEY OF THE LOWER 
INVERTEBRATES 
Three quarters of all living 
organisms on our planet are 
animals without backbones— 
invertebrates. Using lectures, 
slide presentations and hands- 
on labs, Dr. Gary Williams, 
Academy Assistant Curator, 
will help us look at these 
intriguing animals. 
February 16-March 9 
(4 Tuesdays), 7-9 pm 
Cost: $50 members/ 
$60 non-members 
CONSERVING BIOLOGICAL 
DIVERSITY: CASE STUDIES 
IN DEVELOPMENT 
This course will provide an in- 
depth look at several ex- 
amples of “conservation for 
development” which are 
designed to meet immediate 
human needs without compro- 
mising species diversity and 
the ability of future genera- 
tions to meet their own needs. 
Join Dr. Christopher Potter as 
he examines the question, “Is 
biodiversity conservation 
compatible with economic 
development?” 
February 18 & 25 (2 Thurs.), 
7-9 pm 
Cost: $25 members/ 
$30 non-members 
For more information 
call 750-7100. 
DEDICATED TO SCIENTIFIC RESEARCH AND EDUCATION, INSPIRING RESPECT FOR THE NATURAL WORLD 
MEMBERS MEETINGS 
VOCAL RECOGNITION IN 
SEA LIONS: POSSIBLE 
SOCIAL FUNCTIONS 
with Dr. Ronald J. Schusterman 
Wednesday, February 10, 2 pm and 7:30 pm 
Down on the docks of Fisherman’s Wharf, the sea lions fill the air with their raucous 
calls. But what meaning may these calls have to other sea lions? 
Dr. Ron Schusterman of California State University, Hayward and UC Santa Cruz, 
has been studying the vocal patterns of sea lions for many years. By analyzing behav- 
ioral sequences and the structure of vocalizations, as well as performing vocal play- 
back experiments, Dr. Schusterman has found that reciprocal vocal signalling plays 
an important role in individual recognition. Studying field animals as well as captive 
sea lions, Dr. Schusterman has found that individual vocal recognition plays a 
The California Academy of Sciences 
© David M. Barron 
Dr. Schusterman greeting 
one of his study animals. 
fundamental role in the behavior between female sea lions and their pups, mother-daughter 
pairs, and between siblings. 
Vocal recognition also may be a key factor in the observation that neighboring territorial 
males interact less aggressively than territorial males who are relative strangers. 
In addition to describing these important theories, Dr. Schusterman also will discuss the 
bonding that occurs between captive sea lions and their human caretakers. 
Join us for this scientist's intimate look at the behavior of these charming creatures. The 
Academy Store will be open before and after each program. 
Next month's lecture is on March 10 at 2 & 7:30 pm and will feature Carl Grimm of the San 
Francisco League of Urban Gardeners who will discuss urban home gardening and composting. 
