Data Set Citation:
When using this data, please cite the data package:
NCEAS 12192: Fleishman: Ecosystem analysis of pelagic organism declines in the Upper San Francisco Estuary , National Center for Ecological Analysis and Synthesis , and Slater S. 2008.
POD! Fish biomass analyses for DFG Bay Study by Steve Slater
nceas.892.10 (https://knb.ecoinformatics.org:443/knb/metacat/nceas.892.10/nceas)
General Information:
Title:POD! Fish biomass analyses for DFG Bay Study by Steve Slater
Identifier:nceas.892
Abstract:
Excel spreadsheet containing unpublished work on fish biomass analyzes for the DFG Bay Study conducted by Steve Slater. Fish biomass was calculated from catch data provided by the Interagency Ecological Program and Department of Fish and Game(DFG) San Francisco Bay Study (Bay Study). The Bay Study samples with a midwater trawl on a monthly basis at water sites upstream of Central Bay.
Publication Date:2008-04-01
Data Table, Image, and Other Data Details:
Metadata download: Ecological Metadata Language (EML) File
Data Table:Bay Study mwt strbas bpue.csv ( View Metadata | Download File download)
Data Table:Bay Study mwt strbas bpue_alpha code.csv ( View Metadata | Download File download)

Involved Parties

Data Set Creators:
Organization:NCEAS 12192: Fleishman: Ecosystem analysis of pelagic organism declines in the Upper San Francisco Estuary
Organization:National Center for Ecological Analysis and Synthesis
Individual: Steve Slater
Organization:California Department of Fish and Game (DFG)
Data Set Contacts:
Individual: Steve Slater
Organization:California Department of Fish and Game (DFG)
Associated Parties:
Individual: Steve Slater
Metadata Providers:
Individual: Marissa Bauer

Data Set Characteristics

Geographic Region:
Geographic Description:Sacramento-San Joaquin Delta, California
Bounding Coordinates:
West:  122.3728  degrees
East:  122.3728  degrees
North:  37.3728  degrees
South:  37.3728  degrees
Time Period:
Begin:
1980
End:
2006

Sampling, Processing and Quality Control Methods

Step by Step Procedures
Step 1:  
Description:

No sampling occurred in 1994.

The 14 most abundant fishes (99%26#37; of the midwater trawl catch) were used to calculate biomass estimates by the following steps:

The age class designations to calculate CPUE and BPUE were made from the Bay Study database table ;CutOffLengths;.

Wet weight in grams (g) of each fish was calculated from fork lengths (mm) using the relationship W = a*FLb, which was generated for each species from the DFG Length-Weight Special Study.

Biomass-per-unit-effort (BPUE) of each species at each station was calculated as: BPUE = (Sum of wet weight (g) /Tow volume (m3) ) * 10,000

Wet weight was converted to carbon weight using the ratio per Hanson et al. (1997): carbon weight (g) = wet weight (g) * 0.15

Carbon BPUE + 1 was log-transformed and the mean June-October values were reported by year.

Salinity (ppt) and temperature (degrees C) data was collected using a SBE 19 SEACAT Profiler CTD as of 1981.

Used averages of nearby stations and from other projects for missing SalinSurf data (N=75). Used 999 as a place holder for estimates outside June-October period so to be able to group samples in pivot tables.

Wet weight (g) was calculated as W = a*FLb

BPUEMWT = (SumOfWeight (g) per tow /Tow Volume (m3) ) * 10,000

carbon weight (g) = wet weight (g) * 0.15

BPUEcarbon = BPUEMWT * 0.15

Mean Log10 (BPUEcarbon +1)

Data Set Usage Rights

Obtain permission from data set owner(s)
Access Control:
Auth System:knb
Order:denyFirst
Additional Metadata
Additional Metadata
Metadata download: Ecological Metadata Language (EML) File