Holoplanktonic polychaetes off the Southwestern coast of Baja California, México, in March, 1977

Abstract

THIS STUDY IS BASEDS ON THE ANALYSIS OF THE ZOOPLANKTON SAMPLES COLLESTED OFF THE WEST COAST OF BAJA CALIFORNIA (22 26 N) BY THE ISTITUTO NACIONAL DE PESCA, MEXICO, DURING THE CRUISE ANTONIO ALZATE 7702 IN MARCH I - 14, 1977. THE SPECIFIC COMPOSITION OF HOLOPLANKTONIC POLYCHAETES OF THESE SAMPLES IS DESCRIBED, AND DISTRIBUTION AND ABUNDANCE OF EACH SPECIES ARE EXPLAINED BY THEIR RELATION WITH HYDROGRAPHIC DATA. THERE ARE 17 SPECIES, IN WICH THE MOST ABUNDANT ARE TOMOPTERIS PLANKTONIS, LOPADORHYNCHUS HENSENI, T. NATIONALIS AND VANADIS STUDERI. NONE OF THE COMMON SPECIES FROM THE CALIFORNIA CURRENT SYSTEM, REPORTED IN THE LITERATURE IS RECORDED IN THE SURVEY AREA FROM WHICH, IT IS POSSIBLE TO INFER A SNTRONG FAUNISTIC DIFFERENCE.