Data Package Metadata View Summary

California Department of Fish and Wildlife Enhanced Large Fish Study, San Francisco Estuary, California, 2023 Gillnet Survey

General Information

Data Package:

Local Identifier:

edi.1505.4

Title:

California Department of Fish and Wildlife Enhanced Large Fish Study, San Francisco Estuary, California, 2023 Gillnet Survey

Alternate Identifier:

DOI PLACE HOLDER

Abstract:

The Enhanced Large Fish Study (ELFS) was established and included in the Interagency Ecological Program (IEP) work plan in 2023 to fill some of the monitoring gap of fishes in the San Francisco Estuary (SFE), California. The fish monitoring of the IEP prior to ELFS primarily consisted of trawl- and seine-based surveys, which generally capture small and/or juvenile fishes due to survey gear and methodologies. In order to more effectively sample the large/adult fish portion of SFE fish communities, the ELFS uses American Fisheries Society experimental gillnets, plus the inclusion of the optional "large fish panel," to sample the waters of the SFE. The experimental gillnets measure 24.4m in length, 1.8m in depth, and includes eight 3m length panels with stretch mesh measurements of 76.2mm, 114.3mm, 50.8mm, 88.9mm, 38.1mm, 127.0mm, 63.5mm, and 101.6mm. The optional large fish panel measures 9.1m by 1.8m in depth and includes three 3m length panels with stretch mesh measurements of 152.4, 177.8, and 203.2mm. The ELFS conducted its first year of sampling in the North Delta, California, in 2023, and will be expanded to the greater Delta and Suisun Bay and Marsh in future sampling years. The ELFS is currently funded as a special study to inform future monitoring, with funding contracted through fiscal year 2026-2027.

Publication Date:

2023-10-31

For more information:
Visit:	DOI PLACE HOLDER

Time Period

Begin:

2023

End:

2023

People and Organizations
Contact:	Stompe, Dylan K (California Department of Fish and Wildlife, Environmental Scientist) [ email ]
Contact:	Hobbs, James A (California Department of Fish and Wildlife, Environmental Program Manager) [ email ]
Creator:	Stompe, Dylan K (California Department of Fish and Wildlife, Environmental Scientist)
Creator:	Hobbs, James A (California Department of Fish and Wildlife, Environmental Program Manager)

Data Entities
Data Table Name:	Netset Data
Description:	Data from individual gillnet sets from the Enhanced Large Fish Study, including time of day and water quality metrics.
Data Table Name:	Catch Data
Description:	Individual fish catch from Enhanced Large Fish Survey, including species, length, condition, and tag information.
Data Table Name:	Vegetation Data
Description:	Data collected on the presence and catch of submersed aquatic vegetation in Enhanced Large Fish Study.

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/1505/4/47f30ef7caeb68bf83296aa467941de1
Name:	Netset Data
Description:	Data from individual gillnet sets from the Enhanced Large Fish Study, including time of day and water quality metrics.
Number of Records:	153
Number of Columns:	36

Table Structure

Object Name:

ELFS_Netset_102723.csv

Size:

40795 byte

Authentication:

cf07cd0113ffb777a39ca1a14ae828c8 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

netset_ID

year

date

vessel

field_lead

crew_1

crew_2

crew_3

netset_number

set_time

pull_time

set_datetime

pull_datetime

latitude_deg

latitude_decmin

longitude_deg

longitude_decmin

start_depth_m

end_depth_m

location

net_number

start_tide

end_tide

water_temp_c

secchi_depth_cm

salinity_ppt

conductivity_uScm

dissolved_oxygen_percent

dissolved_oxygen_mgl

veg_on_bottom

wind_15

weather

notes

time_of_day

data_entry

QA_QC

Column Name:

netset_ID

year

date

vessel

field_lead

crew_1

crew_2

crew_3

netset_number

set_time

pull_time

set_datetime

pull_datetime

latitude_deg

latitude_decmin

longitude_deg

longitude_decmin

start_depth_m

end_depth_m

location

net_number

start_tide

end_tide

water_temp_c

secchi_depth_cm

salinity_ppt

conductivity_uScm

dissolved_oxygen_percent

dissolved_oxygen_mgl

veg_on_bottom

wind_15

weather

notes

time_of_day

data_entry

QA_QC

Definition:

Unique chronological ID assigned to each individual net set.

Year that sampling event was conducted.

Date that sampling event began. Note: overnight sets may have a date not accurate to individual netset if set was made after midnight.

Name of vessel used for survey.

Name of person leading survey crew.

Name of first crew member. Corresponds to boat operator.

Name of second crew member. Corresponds to non-lead science staff.

Name of third crew member. Corresponds to non-lead science staff.

Chronological order of individual netset on a given sampling day, from a given vessel.

Time (24hr) at which the net was first fully deployed in the water.

Time (24hr) at which the net retrieval process was started.

Date-time column, intended for use in determining the amount of time fished.

Netset pull date-time column, intended for use in determining the amount of time fished. Note: date component is accurate may extend into following date if pull time was after midnight.

The degree component of latitude at the end of the netset deployment.

The decimal-minute component of latitude at the end of the netset deployment.

The degree component of longitude at the end of the netset deployment.

The decimal-minute component of longitudeat the end of the netset deployment.

The depth as read by onboard fishfinder at the start of the netset deployment.

The depth as read by onboard fishfinder at the end of the netset deployment.

General location where sampling event occurred.

Number assigned to individual gillnet.

Tidal condition at the start of a netset.

Tidal condition at the end of a netset.

Surface water temperature, in degree Celsius.

Secchi depth measured in centimeters. Measured with 8" black and white (freshwater type) secchi disk.

Surface water salinity measured in parts per thousand.

Surface water conductivity measured in microsiemens per centimeter.

Surface water dissolved oxygen measured in percent.

Surface water dissolved oxygen measured in milligrams per liter.

Was submersed aquatic vegetation present in net path, as determined visually or via sonar

Was wind greater than or equal to 15mph, sustained, during the netset

Dominant weather condition during the netset.

Notes relevant to individual netset.

Time of day, referring to "day" or "night"

Initials of staff conducting data entry.

Initials of staff conducting QA/QC

Storage Type:

float

dateTime

string

float

dateTime

float

string

float

string

float

string

Measurement Type:

ratio

dateTime

nominal

ratio

dateTime

ratio

nominal

ratio

nominal

ratio

nominal

Measurement Values Domain:

Unit	ID value
Type	integer

Format	YYYY
Precision

Format	YYYY-MM-DD
Precision

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	beowulf
Definition	~25 foot Munson walkaround cabin boat.
Source

Code Definition

Code	kvichak_1
Definition	24' Kvichak Center Console Boat - equipped with radar and high end sonar.
Source

Code Definition

Code	kvichak_2
Definition	24' Kvichak Center Console Boat - not equipped with radar or high end sonar.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	D_Stompe
Definition	D. Stompe, Environmental Scientist/Project PI
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	P_Macias
Definition	P. Macias. Boat operator.
Source

Code Definition

Code	Z_Liddle
Definition	Z. Liddle. Boat operator.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	A_Ortega
Definition	A. Ortega. Scientific Aid.
Source

Code Definition

Code	J_Canepa
Definition	J. Canepa. Scientific Aid.
Source

Code Definition

Code	T_Mitoma
Definition	T. Mitoma. Scientific Aid.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	A_Ortega
Definition	A. Ortega. Scientific Aid.
Source

Code Definition

Code	B_Bloom
Definition	B. Bloom. Science intern.
Source

Code Definition

Code	J_Canepa
Definition	J. Canepa. Scientific Aid.
Source

Unit	Netset order
Type	real

Format	hh:mm
Precision

Format	hh:mm
Precision

Format	YYYY-MM-DD hh:mm:ss
Precision

Format	YYYY-MM-DD hh:mm:ss
Precision

Unit	Degree
Type	real

Unit	Decimal minute
Type	real

Unit	Degree
Type	real

Unit	Decimal minute
Type	real

Unit	meter
Type	real

Unit	meter
Type	real

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	barker_slough
Definition	Barker slough, from North Bay Aqueduct to confluence with Lindsay Slough.
Source

Code Definition

Code	cache_slough
Definition	Cache Slough, from approximately miner slough entrance to confluence with Haas slough.
Source

Code Definition

Code	haas_slough
Definition	Haas slough, to confluence with Cache slough.
Source

Code Definition

Code	liberty_cut
Definition	Liberty cut, on northeast portion of Liberty Island, between prospect slough and the stairsteps.
Source

Code Definition

Code	lindsey_slough
Definition	Lindsey slough, from Calhoun Cut/Barker slough confluence to Cache Slough confluence.
Source

Code Definition

Code	miner_slough
Definition	Miner slough, from Sacramento River confluence to Cache Slough confluence.
Source

Code Definition

Code	prospect_slough
Definition	Prospect slough, from Liberty Cut confluence to Cache Slough confluence.
Source

Code Definition

Code	sacramento_river
Definition	Sacramento River
Source

Code Definition

Code	shag_slough
Definition	Shag slough, on west side of Liberty Island from Cache slough confluence to stairsteps confluence.
Source

Code Definition

Code	stairsteps
Definition	Stairsteps, on north side of Liberty Island from Shag Slough confluence to Liberty Cut confluence.
Source

Code Definition

Code	steamboat_slough
Definition	Steamboat slough, from Sacramento River confluence to Cache Slough confluence.
Source

Code Definition

Code	sutter_slough
Definition	Sutter Slough
Source

Code Definition

Code	toe_drain
Definition	Toe drain, extending from prospect slough up towards the Yolo Bypass.
Source

Code Definition

Code	ulatis_slough
Definition	Ulatis slough, at Northwest portion of Cache Slough complex, extending to confluence with Cache slough.
Source

Unit	individual net ID
Type	real

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	ebb
Definition	Current moving downstream and/or water level dropping.
Source

Code Definition

Code	flood
Definition	Current moving upstream and/or water level rising.
Source

Code Definition

Code	NA
Definition	unknown
Source

Code Definition

Code	slack
Definition	Current not moving and/or water level not changing.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	ebb
Definition	Current moving downstream and/or water level dropping.
Source

Code Definition

Code	flood
Definition	Current moving upstream and/or water level rising.
Source

Code Definition

Code	slack
Definition	Current not moving and/or water level not changing.
Source

Unit	celsius
Type	real

Unit	centimeter
Type	integer

Unit	parts per thousand
Type	real

Unit	microsiemens per centimeter
Type	real

Unit	percent
Type	real

Unit	milligramPerLiter
Type	real

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	no
Definition	No vegetation visible.
Source

Code Definition

Code	unknown
Definition	unknown
Source

Code Definition

Code	yes
Definition	Vegetation was visible with eyes or sonar.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	FALSE
Definition	Wind not over 15mph sustained.
Source

Code Definition

Code	TRUE
Definition	Wind over 15mph sustained.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	clear
Definition	Clear skies, little to no cloud cover.
Source

Code Definition

Code	cloudy
Definition	Partial or full cloud cover.
Source

Code Definition

Code	rain
Definition	Rain.
Source

Definition

text

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	day
Definition	Netset conducted between sunrise and sunset.
Source

Code Definition

Code	night
Definition	Netset conducted between evening civil twighlight and sunrise.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	dks
Definition	D. Stompe
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	dks
Definition	D. Stompe
Source

Missing Value Code:

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/1505/4/1d0156949916ae333ed39cac86e251ad
Name:	Catch Data
Description:	Individual fish catch from Enhanced Large Fish Survey, including species, length, condition, and tag information.
Number of Records:	577
Number of Columns:	16

Table Structure

Object Name:

ELFS_Catch_092523.csv

Size:

58870 byte

Authentication:

c29631d492cc78b2f55882a8afbad10c Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

fish_ID

year

date

vessel

netset_number

species

pit_tag_code

fork_length_mm

total_length_mm

standard_length_mm

large_fish_panel

condition

recapture

Notes

data_entry

QA_QC

Column Name:

fish_ID

year

date

vessel

netset_number

species

pit_tag_code

fork_length_mm

total_length_mm

standard_length_mm

large_fish_panel

condition

recapture

Notes

data_entry

QA_QC

Definition:

Individually coded chronological ID for each captured fish.

Year that sampling event was conducted.

Date that sampling event began. Note: overnight sets may have a date not accurate to individual catch if set was made after midnight.

Name of vessel used for survey.

Chronological order of individual netset on a given sampling day, from a given vessel.

Six digit species code of fish captured.

16-digit PIT tag code, in hexadecimal formal. Deployed tags are 12mm HDX.

Fork length (length from tip of nose to fork in tail) measured in millimeters.

Total length (length from tip of nose to end of tail) measured in millimeters.

Standard length (length from tip of nose to end of vertebral column at caudal peduncle) measured in millimeters.

Denotes whether fish was caught in large fish panel.

Condition of fish at time of release.

Was fish previously tagged/marked?

Notes relevant to individual fish capture.

Initials of staff conducting data entry.

Initials of staff conducting QA/QC

Storage Type:

float

dateTime

string

float

string

float

string

Measurement Type:

ratio

dateTime

nominal

ratio

nominal

ratio

nominal

Measurement Values Domain:

Unit	ID
Type	integer

Format	YYYY
Precision

Format	YYYY-MM-DD
Precision

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	beowulf
Definition	~25 foot Munson walkaround cabin boat.
Source

Code Definition

Code	kvichak_1
Definition	24' Kvichak Center Console Boat - equipped with radar and high end sonar.
Source

Code Definition

Code	kvichak_2
Definition	24' Kvichak Center Console Boat - not equipped with radar or high end sonar.
Source

Unit	ID value
Type	real

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	AMESHA
Definition	American Shad
Source

Code Definition

Code	BLACRA
Definition	Black Crappie
Source

Code Definition

Code	BLUGIL
Definition	Bluegill
Source

Code Definition

Code	CHACAT
Definition	Channel Catfish
Source

Code Definition

Code	COMCAR
Definition	Common Carp
Source

Code Definition

Code	GOLSHI
Definition	Golden Shiner
Source

Code Definition

Code	HITCH
Definition	Sacramento Hitch
Source

Code Definition

Code	LARBAS
Definition	Largemouth Bass
Source

Code Definition

Code	REDEAR
Definition	Redear Sunfish
Source

Code Definition

Code	SACPIK
Definition	Sacramento Pikeminnow
Source

Code Definition

Code	SACSUC
Definition	Sacramento Sucker
Source

Code Definition

Code	SPLITT
Definition	Sacramento Splittail
Source

Code Definition

Code	STRBAS
Definition	Striped Bass
Source

Code Definition

Code	THRSHA
Definition	Threadfin Shad
Source

Code Definition

Code	TULPER
Definition	Tule Perch
Source

Code Definition

Code	WHICAT
Definition	White Catfish
Source

Definition

text

Unit	millimeter
Type	real

Unit	millimeter
Type	real

Unit	millimeter
Type	real

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	FALSE
Definition	Fish was not in large fish panel.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	dead
Definition	Fish dead - no evidence of respiration.
Source

Code Definition

Code	fair
Definition	Fish alive but with mildly impaired equilibrium or visible injuries from net.
Source

Code Definition

Code	good
Definition	Fish alive, swimming strong, and with minimal injuries
Source

Code Definition

Code	poor
Definition	Fish alive but substantially impaired equilibrium, respiration, and/or substantial injuries from net.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	FALSE
Definition	Fish was not a recapture.
Source

Code Definition

Code	TRUE
Definition	Fish was a recapture.
Source

Definition

text

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	dks
Definition	D. Stompe
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	dks
Definition	D. Stompe
Source

Missing Value Code:

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/1505/4/aa9ac532588746f8a4fc615e00315356
Name:	Vegetation Data
Description:	Data collected on the presence and catch of submersed aquatic vegetation in Enhanced Large Fish Study.
Number of Records:	153
Number of Columns:	17

Table Structure

Object Name:

ELFS_Vegetation_092123.csv

Size:

20955 byte

Authentication:

a4e3d1bfef4f6c8e2e2ef751bc667855 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

netset_ID

year

date

gear

netset_number

station_moved

veg_visible_in_path

veg_visible_near_path

water_velocity_<1ms

veg_blocked_flowmeter

veg_entered_net

one_species_>50

veg_species

veg_rooted

comments

data_entry

QA_QC

Column Name:

netset_ID

year

date

gear

netset_number

station_moved

veg_visible_in_path

veg_visible_near_path

water_velocity_<1ms

veg_blocked_flowmeter

veg_entered_net

one_species_>50

veg_species

veg_rooted

comments

data_entry

QA_QC

Definition:

Unique chronological ID assigned to each individual net set.

Year that sampling event was conducted.

Date collected in MM/DD/YYYY format.

Gear type used in survey.

Chronological order of individual netset on a given sampling day, from a given vessel.

Did the station have to be moved due to the presence of submersed aquatic vegetation?

Was vegetation visible in the net path?

Was submersed aquatic vegetation present near net path, as determined visually or via sonar

Was the water velocity to the flowmeter less than 1 m/s?

Did vegetation block the flowmeter?

Did vegetation enter the net? (Did not need to stay in net)

If vegetation entered the net, did one species make up at least 50% of vegetation?

Name of vegetation species, if it made up at least 50% of vegetation in net.

Was at least 50% of the vegetation in the net rooted?

Comments pertaining to individual netset vegetation data.

Initials of staff conducting data entry.

Initials of staff conducting QA/QC

Storage Type:

float

dateTime

string

float

string

Measurement Type:

ratio

dateTime

nominal

ratio

nominal

Measurement Values Domain:

Unit	ID value
Type	integer

Format	YYYY
Precision

Format	YYYY-MM-DD
Precision

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	AFS_experimental_gillnet
Definition	American Fisheries Society experimental gillnet, plus the optional "large fish panel".
Source

Unit	Netset order
Type	real

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	no
Definition	Station not moved.
Source

Code Definition

Code	yes
Definition	Station moved.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Eyes or Sonar
Definition	Vegetation was visible with eyes or sonar.
Source

Code Definition

Code	no
Definition	No vegetation visible.
Source

Code Definition

Code	unk
Definition	Unknown.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Eyes or Sonar
Definition	Vegetation was visible with eyes or sonar.
Source

Code Definition

Code	no
Definition	No vegetation visible.
Source

Code Definition

Code	unk
Definition	unknown
Source

Definition

text

Definition

text

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	no
Definition	Vegetation did not enter the net.
Source

Code Definition

Code	yes
Definition	Vegetation did enter net.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	no
Definition	No, one species did not make up at least 50% of vegetation.
Source

Code Definition

Code	yes
Definition	Yes, one species did make up at least 50% of vegetation.
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	C_demersum
Definition	Coontail
Source

Code Definition

Code	E_densa
Definition	Brazilian Waterweed
Source

Code Definition

Code	filamentous_algae
Definition	Unidentified filamentous algae
Source

Code Definition

Code	oak_leaves
Definition	Terrestrial oak leaves/sticks
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	non-rooted
Definition	At least 50% of the vegetation in the net was non-rooted.
Source

Definition

text

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	dks
Definition	D. Stompe
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	dks
Definition	D. Stompe
Source

Missing Value Code:

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Code	NA
Expl	Value missing

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data ("Data User" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
(No thesaurus)	san francisco estuary, CDFW, assemblage, community, AFS Experimental Gillnet, striped bass, hitch, gillnet
LTER Controlled Vocabulary	fishes

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

The ELFS samples large fishes in the San Francisco Estuary via American Fisheries Society (AFS) experimental gillnets using stratified random site selection to maximize spatial representation and site distribution and minimize bias in site selection. Captured fishes are enumerated, measured, and PIT tagged prior to release, providing regional indices of large fish abundance and population size structure, as well as the potential for mark-recapture analysis.

To fully sample the large fish community and in keeping with American Fisheries Society (AFS) standard sampling protocols, the ELFS uses AFS experimental gillnets with the addition of “large fish” panels to increase capture efficiency of larger individuals. The standard AFS experimental gillnet measures 24.4m in length by 1.8m in depth and includes eight 3m length panels with stretch mesh measurements of 76.2mm, 114.3mm, 50.8mm, 88.9mm, 38.1mm, 127.0mm, 63.5mm, and 101.6mm. The optional large fish panel measures 9.1m by 1.8m in depth and includes three 3m length panels with stretch mesh measurements of 152.4, 177.8, and 203.2mm.

Nets are fished anchored and set times are limited to approximately one hour to minimize mortality. Typically, 6-8 net sets are fished during a single sampling day. Sampling occurs between April and October to minimize ESA take; however, sampling may occasionally be suspended during periods of high-water temperatures to minimize associated fish stress/mortality. Paired day and night sampling was conducted during sampling year 2023 to test the effect of net visibility on capture efficiency.

Finally, a full suite of water quality and habitat metrics are measured at each gillnet sampling site. Water quality metrics are collected using a YSI sonde (ProSolo ODO/CT) and include water temperature, conductivity, salinity, dissolved oxygen (% and mg/L), and secchi depth (8" black and white, freshwater type). Habitat metrics collected include presence of SAV and tidal state.

People and Organizations

Publishers:

Organization:

Environmental Data Initiative

Email Address:

info@edirepository.org

Web Address:

https://edirepository.org

Id:

https://ror.org/0330j0z60

Creators:

Individual:

Dr. Dylan K Stompe

Organization:

California Department of Fish and Wildlife

Position:

Environmental Scientist

Address:

2825 Cordelia Rd,

Unit 100,

Fairfield, California 94534 United States

Phone:

2096392938 (voice)

Email Address:

dylan.stompe@wildlife.ca.gov

Id:

https://orcid.org/0000-0002-5994-2014

Individual:

Dr. James A Hobbs

Organization:

California Department of Fish and Wildlife

Position:

Environmental Program Manager

Email Address:

james.hobbs@wildlife.ca.gov

Id:

https://orcid.org/0000-0002-4052-9000

Contacts:

Individual:

Dr. Dylan K Stompe

Organization:

California Department of Fish and Wildlife

Position:

Environmental Scientist

Address:

2825 Cordelia Rd,

Unit 100,

Fairfield, CA 94534 United States

Phone:

2096392938 (voice)

Email Address:

dylan.stompe@wildlife.ca.gov

Id:

https://orcid.org/0000-0002-5994-2014

Individual:

Dr. James A Hobbs

Organization:

California Department of Fish and Wildlife

Position:

Environmental Program Manager

Address:

United States

Email Address:

james.hobbs@wildlife.ca.gov

Id:

https://orcid.org/0000-0002-4052-9000

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period

Begin:

2023

End:

2023

Geographic Region:

Description:

The North Delta, San Francisco Estuary, California, USA. Sloughs sampled include Cache Slough, Miner Slough, Lindsey Slough, Haas slough, Barker Slough, Shag Slough, Steamboat Slough, Sutter Slough, Prospect Slough, Ulatis Slough, Calhoun Cut, and the Yolo Bypass Toe Drain.

Bounding Coordinates:

Northern:	38.326172	Southern:	38.179161
Western:	-121.805496	Eastern:	-121.570664

Project

Parent Project Information:

Title:

CDFW Enhanced Large Fish Study

Personnel:

Individual:

Dr. Dylan K Stompe

Organization:

California Department of Fish and Wildlife

Position:

Environmental Scientist

Address:

2825 Cordelia Rd,

Unit 100,

Fairfield, California 94534 United States

Phone:

2096392938 (voice)

Email Address:

dylan.stompe@wildlife.ca.gov

Id:

https://orcid.org/0000-0002-5994-2014

Role:

Project Lead

Abstract:

This study was designed to expand IEP sampling to the large fish component of the SFE fish community. Our objectives are to describe trends in the spatial distribution and abundance of large fishes, and to describe population demographics. Our research questions are as follows:

• What sampling methods and intensity are required to fully represent the large fish component of regional SFE fish communities?

• How does the assemblage of fishes captured in gillnets compare to alternative sampling methods (electrofishing, trawl, etc.)?

• Can mark-recapture be used to determine regional abundance and movement dynamics?

• What fishes make up regional fish assemblages and what are the trends in the composition of these assemblages?

• What are the regional abundance and size structure trends of SFE large fishes?

Maintenance

Maintenance:

Description:	This dataset will be updated annually, prior to December 31 of the sampling year, through the end of the contracted period (fiscal year 2026-2027).
Frequency:	annually

Other Metadata

Additional Metadata

additionalMetadata
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        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
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        |     |     |     |  \___attribute 'name' = 'ID value'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'Chronological ID value.'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'parts per thousand'
        |     |     |     |  \___attribute 'name' = 'parts per thousand'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |___text '\n        '
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        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'microsiemens per centimeter'
        |     |     |     |  \___attribute 'name' = 'microsiemens per centimeter'
        |     |     |     |___text '\n          '
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        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'Decimal minute'
        |     |     |     |  \___attribute 'name' = 'Decimal minute'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'Degree'
        |     |     |     |  \___attribute 'name' = 'Degree'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'ID'
        |     |     |     |  \___attribute 'name' = 'ID'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'Netset order'
        |     |     |     |  \___attribute 'name' = 'Netset order'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'individual net ID'
        |     |     |     |  \___attribute 'name' = 'individual net ID'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
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        |___text '\n  '

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'emlEditor'
        |     |        \___attribute 'app' = 'ezEML'
        |     |        \___attribute 'release' = '2023.10.25'
        |     |___text '\n    '
        |___text '\n  '

Copyright 2024 Environmental Data Initiative. This material is based upon work supported by the National Science Foundation under grants #2223103 and #2223104. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Please contact us with questions, comments, or for technical assistance regarding this web site or the Environmental Data Initiative. Please read our privacy policy to know what information we collect about you and to understand your privacy rights.

EDI is a collaboration between the University of New Mexico and the University of Wisconsin – Madison, Center for Limnology:

Data Package Metadata View Summary

California Department of Fish and Wildlife Enhanced Large Fish Study, San Francisco Estuary, California, 2023 Gillnet Survey

Data Entities

Data Table

Data Table

Data Table

Data Package Usage Rights

Keywords

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Parent Project Information:

Maintenance

Additional Metadata

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

California Department of Fish and Wildlife Enhanced Large Fish Study, San Francisco Estuary, California, 2023 Gillnet Survey

+/- Data Entities

Data Table

Data Table

Data Table

+/- Data Package Usage Rights

+/- Keywords

+/- Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

+/- People and Organizations

+/- Temporal, Geographic and Taxonomic Coverage

+/- Project

Parent Project Information:

+/- Maintenance

+/- Additional Metadata

+/- Additional Metadata

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance

Additional Metadata

Additional Metadata