CalCOFI Reports, Vol. 18, 1976
Contents
	Page
I. Review of Activities of 1 July 1973 to 30 June 1975	5
Report of the CaICOFI Committee	5
Agency Reports	6
Review of the Pelagic Wet Fisheries for 1973 and 1974	21
Publications	23
II.  Symposia of the CaICOFI Conference San Clemente, November 4-7, 1973
A. Fishery Science: Fact, Fiction, and Dogma.
Catch per Unit of Effort: Fact, Fiction, and Dogma.  John Radovich	31
Fishery Science: Fact, Fiction, and Dogma.  John D. Isaacs	34
Fishery Science: Fact, Fiction, and Dogma.  Brian J. Rothschild	44
Panel Discussion.  Herbert W. Frey moderator, John D. Isaacs, John Radovich, and
Brian J. Rothschild, panel members	45
B. Oceanography and Fisheries of Baja California Waters.
Hidrologia del Alto Golfo de California - I. Condiciones Durante Otono.
Saul Alvarez, Borrego and Luis Arnulfo Galindo Bect	51
Hidrologia de la Bahia de San Quintin,Baja California, en Invierno y Primavera.
Amelia Guadalupe Chavez de Nishikawa and Saul Alvarez Borrego	60
Concentracion de DDT y sus Metabolitos en Especies Filtroalimentadores y
Sedimentosen el Valle de Mexicali y Alto Golfo de California.          J. Guardado Puentes	73
Elementos Sobre la Distribucion de Turbidez en el Alto Golfo de California.
Guadalupe Garcia de Ballesteros and Michel Larroque	81
C Scientific Contributions
On Biology of the Market Squid, Loligo opalescens, a Contribution Toward the
Knowledge of Its Food Habits and Feeding Behavior.  Anatole S. Loukashkin	109
Deep Scattering Layers: Patterns in the Pacific.  Sargun A. Tont	112
Benthic Oceanography and the Distribution of Bottom Fish Off Los Angeles.
Alan J. Mearns and Lucinda Smith	118
III. Symposia of the Cal COFI Conference Santa Barbara, November 12 14, 1974
Roles of Phytoplankton in Marine Food Webs.  Richard W Eppley	125
An Experimentalist's View of Zooplankton Models.  Michael M. Mullin	132
Density Dependence of Catchability Coefficient in the California Pacific Sardine,
Sardinops sagax caerulea, Purse Seine Fishery.  Alec D. MacCall	136
Sonar Mapping in the California Current Area: A Review of Recent Developments.
Rodger Hewitt	149
California Undercurrent in the Southern California Bight.  Mizuki Tsuchiya	155
Sediment Trap Applications in the Nearshore Region.  Floyd K. Mitchell	159
Trace Element Anomalies in Marine Organisms off Southern California.
David R. Young and Dierdre J. McDermott	162
Report of Neuston (Surface) Collections Made on an Extended CaICOFI Cruise
During May 1972.  Elbert H. Ahlstrom and Elizabeth Stevens	167
IV. Scientific Contributions
Ovarian Development and Fecundity of Five Species of California Current Fishes.
John S. MacGregor	181