Hyperiid amphipod abundances from the California Current (24-32°N)
|Temporal extent||2002-07 -2008-07|
|Author(s)||Lavaniegos Bertha E.1|
|Affiliation(s)||1 : CICESE, Laboratorio de Zooplancton, Carretera Ensenada-Tijuana No. 3918, Ensenada, Baja California, Mexico|
|Keyword(s)||upwelling, ENSO, seasonal variability, biogeography, diversity, zooplankton, eastern Pacific, Eupronoe minuta, Lestrigonus schizogeneios, Primno brevidens, Vibilia armata|
The California Current system (CCS) comprise two large regions, one subarctic from central California to British Columbia, and other subtropical from Point Conception, California to the tip of Baja California peninsula. To progress in the knowledge of the subtropical part of the CCS, was created the IMECOCAL program, which means “Mexican Research of the California Current”. The data base presented here is a product of the zooplankton collection during ten IMECOCAL cruises. Zooplankton samples were collected with oblique net tows in the upper 200 m (or from 10 m above the sea floor in shallow stations), using a Bongo net of 500 µm mesh width and mouth diameter of 0.7 m. Four cruises correspond to the four seasons of 2005 and the rest are summer cruises preformed during 2002-2008. Hyperiid amphipods were identified using mainly the taxonomic key for Hyperiidea of the world oceans (Vinogradov et al., 1996). The total number of samples analyzed were 482 but hyperiids were absent in 18. The positive samples were 75% of the oceanic stations collected during nighttime, and the rest were from neritic stations (11% nighttime and 14% daytime). The total number of species found are 125, with strong dominance of Vibilia armata, Lestrigonus schizogeneios, Primno brevidens, and Eupronoe minuta. The abundances of these and other common species changes seasonally as described by Lavaniegos & Hereu (2009), and interannually as observed in summer of the period 2002-2008 for the northern Baja California region (Lavaniegos, 2017) and the Gulf of Ulloa and offshore region (Lavaniegos, under review).
|Utilisation||The data are solely the responsability of the author. They are intended to be research-quality.|
|Acknowledgements||Thanks are given to scientist and technicians participating in the IMECOCAL cruises. CONACYT provided funds through the project "Seasonal variation of the hyperiid amphipods and influence of mesoscale structures in Mexican waters of the California Current" (grant # 47044) and the project "Interannual variability of the hyperiid amphipods in the Bajacalifornian Pacific during a period of changes in salinity and coastal upwelling" (grant # 129611).|
The file contains information of sampling stations (coordinates, date and hour - Pacific standard time-, maximum depht), and standarized abundance (ind/1000 m3) by species and station.