Striped Bass Seine Survey of the Maryland Department of Natural Resources
Entry ID: MDDNR_stripedbass

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Summary
Abstract: The juvenile striped bass survey documents annual year-class success for
young-of-the-year (YOY) striped bass (Morone saxatilis) and relative abundance
of many other fish species in Chesapeake Bay. Over 100 fish species have been
collected since 1954. Annual indices of relative abundance provide an early
indicator of future adult stock recruitment and document annual variation and
long-term trends in abundance and distribution.

Sample Area and Intensity: Juvenile indices are derived annually from sampling
at 22 fixed stations within Maryland's portion of the Chesapeake Bay. Stations
have been sampled continuously since 1954, with changes in some station
locations. They are divided among four of the major spawning and nursery areas:
seven each in the Potomac River and Head of Bay areas and four each in the
Nanticoke and Choptank Rivers. Sampling is monthly, with rounds (sampling
excursions) occurring during July (Round I), August (Round II), and September

(Round III). Replicate seine hauls, a minimum of thirty minutes apart, are
taken at each site on each sample round. This produces a total of 132 samples
from which bay-wide means are calculated. From 1954 to 1961, juvenile surveys
included various stations and rounds. Sample sizes ranged from 34 to 46.
Present indices derived for this period include only stations which are
consistent with subsequent years. In 1962, stations were standardized and a
second sample round was added for a total of 88 samples. A third sample round,
added in 1966, increased sample size to 132. Auxiliary stations have been
sampled on an inconsistent basis and are not included in survey indices. These
data enhance geographical coverage in rivers with permanent stations or provide
information from other river systems. They are also useful for replacement of
permanent stations when necessary.

Related URL
Link: VIEW PROJECT HOME PAGE
Description: Maryland Department of Natural Resources Striped Bass Seine Survey Juvenile
Index
Home Page.


Geographic Coverage
 N: 40.0 S: 36.0  E: -75.0  W: -78.0

Data Set Citation
Dataset Originator/Creator: Durell, E.Q. and Weedon, C., Maryland Department of Natural Resources
Dataset Title: Striped Bass Seine Survey Juvenile Index
Dataset Release Date: 2002
Dataset Publisher: Maryland Department of Natural Resources, Fisheries Service.
Online Resource: http://www.dnr.state.md.us/fisheries/juvindex/index.html.


Temporal Coverage
Start Date: 1954-01-01


Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CHESAPEAKE BAY


Science Keywords
AGRICULTURE >AGRICULTURAL AQUATIC SCIENCES >FISHERIES >STRIPED BASS    [Definition]
OCEANS >AQUATIC SCIENCES >FISHERIES >STRIPED BASS    [Definition]
BIOLOGICAL CLASSIFICATION >ANIMALS/VERTEBRATES >FISH >RAY-FINNED FISHES >PERCH-LIKE FISHES >STRIPED BASS


ISO Topic Category
FARMING
BIOTA
ECONOMY
OCEANS


Access Constraints
To access data you must use Internet Explorer. Click on links at to view
relative abundance data and graphs for a particular species. The fifteen most
commonly requested species are pictured. Data is presented in an Excel file
which can be downloaded by clicking "Save As" on your browser. Each file
contains data and graphs for the Chesapeake Bay (includes all areas sampled),
Choptank River, Head of Bay area, Nanticoke River, and Potomac River. Each
system appears in a separate worksheet. Although system-specific indices appear
for each species, they may not always be appropriate. For example: only one
site on the Choptank River is of low enough salinity to be considered good
habitat for juvenile yellow perch. Indices of relative abundance are presented
as Geometric Mean Catch per Haul. The Geometric Mean (GM) has been adopted by
the Atlantic States Marine Fisheries Commission as the preferred index of
relative abundance. The GM is a statistical way of handling the data that is
more precise than the Arithmetic Mean Catch per Haul because it is not as
sensitive to a single large sample value. The Arithmetic Mean Catch per Haul
(AM) is presented for striped bass because it is the most widely recognized and
easily understood juvenile index. Also appearing in the data tables are: year,
number of samples (n), and 95 % confidence intervals.


Use Constraints
None


Keywords
juvenile index
seine survey
Maryland
Potomac River
Nanticoke River
Choptank Rivers
alewife herring
American shad
Atlantic croaker
Atlantic menhaden
Atlantic silverside
bay anchovy
blueback herring
bluefish
mummichog
spot
spottail shiner
white perch


Data Set Progress
IN WORK


Data Center
Fisheries Service, Department of Natural Resources, Maryland    [Information]
Data Center URL: http://www.dnr.state.md.us/fisheries/

Data Center Personnel
Name: ERIC DURELL
Email: edurell at dnr.state.md.us
Contact Address:
Maryland Department of Natural Resources
Fisheries Service
Tawes Building, B-2
Taylor Avenue
City: Annapolis
Province or State: MD
Postal Code: 21401
Country: USA


Personnel
ERIC DURELL
Role: TECHNICAL CONTACT
Email: edurell at dnr.state.md.us
Contact Address:
Maryland Department of Natural Resources
Fisheries Service
Tawes Building, B-2
Taylor Avenue
City: Annapolis
Province or State: MD
Postal Code: 21401
Country: USA


TYLER B. STEVENS
Role: DIF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA



Creation and Review Dates
DIF Creation Date: 2003-09-30
Last DIF Revision Date: 2012-12-21
Future DIF Review Date: 2004-09-30

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