From refbase
Record 1 of 4
DN: Database Name
Oceanic Abstracts
TI: Title
Sources of uncertainty in ichthyoplankton surveys: modeling the
influence of wind forcing and survey strategy on abundance estimates
AU: Author
Voss, R; Hinrichsen, H-H
AF: Affiliation
Institute of Marine Sciences Kiel, Duesternbrooker Weg 20, D-24105,
Kiel, Germany, [mailto:rvoss@ifm.uni-kiel.de]
SO: Source
Journal of Marine Systems [J. Mar. Syst.]. Vol. 43, no. 3-4, pp.
87-103. Dec 2003.
IS: ISSN
0924-7963
DE: Descriptors
Ichthyoplankton surveys; Fish larvae; Marine fish; Physical
oceanography; Hydrographic surveys; Fishery surveys; Atmospheric
forcing; Ocean-atmosphere system; Gadus morhua; ANE, Baltic Sea,
Bornholm Basin
AB: Abstract
A three-dimensional physical oceanographic model was used to simulate
the temporal evolution of ichthyoplankton distributions in the
Bornholm Basin, Baltic Sea. The Bornholm Basin is one of the major
spawning grounds for cod (Gadus morhua callarias L.) and sprat
(Sprattus sprattus balticus S.) in the Baltic Sea with a large number
of historic survey data as well as material from ongoing
investigations being available. The aim of the present study was to
investigate the quantitative influence of different factors on
abundance estimates of early life stages (eggs and larvae) of cod and
sprat. Influences under consideration were advective losses,
uncertainty due to non-sufficient spatial sampling resolution (e.g.
number of stations) and effects of the sampling strategy (e.g.
sequence of stations). The numerical simulations were performed for
two time periods with contrasting meteorological forcing conditions.
Errors in abundance estimates were highest at high wind speeds and
when the organisms showed a patchy distribution. Advective losses were
highest for the shallowest distributed life stages (cod and sprat
larvae). Under strong west-wind conditions, losses due to transport
out of the surveyed area reached up to >10% after 2 days. Different
sampling strategies had no impact on overall accuracy. Errors due to
sampling resolution amounted to 2-26% for the standard grid of 45
stations. The results suggest that wind forcing might serve as a first
rough approximation for the reliability of historic abundance
estimates.
PB: Publisher
Elsevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands,
[mailto:nlinfo-f@elsevier.nl], [URL:http://www.elsevier.nl/]
DO: DOI
10.1016/j.jmarsys.2003.05.001
LA: Language
English
SL: Summary Language
English
PY: Publication Year
2003
PT: Publication Type
Journal Article
ID: Identifiers
Atlantic cod
ER: Environmental Regime
Marine; Brackish
CL: Classification
O 1070 Ecology/Community Studies
UD: Update
200404
SF: Subfile
Oceanic Abstracts; Meteorological & Geoastrophysical Abstracts
AN: Accession Number
5785762
JP: Journal Pages
87-103
JV: Journal Volume
43
JI: Journal Issue
3-4
Record 2 of 4
DN: Database Name
ASFA: Aquatic Sciences and Fisheries Abstracts
TI: Title
The marine copepod, Pseudocalanus elongatus, as a mediator between
climate variability and fisheries in the Central Baltic Sea
AU: Author
Moellmann, C; Kornilovs, G; Fetter, M; Koester, F; Hinrichsen, H
AF: Affiliation
Institute of Marine Sciences, Duesternbrooker Weg 20, D-24105 Kiel,
Germany Danish Institute for Fisheries Research, Charlottenlund
Castle, DK-2920 Charlottenlund, Denmark, [mailto:cmo@dfu.min.dk]
SO: Source
Fisheries Oceanography [Fish. Oceanogr.]. Vol. 12, no. 4-5, pp.
360-368. Sep 2003.
IS: ISSN
1054-6006
DE: Descriptors
Marine fish; Commercial species; Clupeoid fisheries; Fishery biology;
Body conditions; Diets; Food availability; Marine crustaceans;
Population dynamics; Biomass; Environmental effects; Ocean-atmosphere
system; Atmospheric forcing; Atmospheric precipitations; Alkalinity;
Fishery oceanography; Clupea harengus; Pseudocalanus elongatus; ANE,
Baltic Sea
AB: Abstract
Pseudocalanus elongatus is a key species in the pelagic zone of the
deep basins of the Central Baltic Sea. The copepod serves as a major
food organism for larval as well as for adult, pelagic planktivorous
fish. Large interannual fluctuations in the standing stock of P.
elongatus have been attributed to significant changes in the
hydrographic environment over the last two decades. In particular, the
decreasing salinity in the Baltic deep basins, a result of a change in
atmospheric forcing leading to an increase in rainfall since the 1980s
and of a lack of pulses of saline water intrusions from the North Sea,
was found to affect reproduction and maturation of the copepod. In
parallel, dramatic changes in the weight-at-age of herring, one of the
most important commercial fishes of the Baltic Sea, have been observed
since the late 1980s. Using time-series on herring stomach contents,
as well as length and weight, we provide evidence for a chain of
events relating variability in climate, salinity and P. elongatus
abundance to changes in diet and condition of herring in the Central
Baltic Sea.
PB: Publisher
Blackwell Science Ltd
DO: DOI
10.1046/j.1365-2419.2003.00257.x
LA: Language
English
SL: Summary Language
English
PY: Publication Year
2003
PT: Publication Type
Journal Article
ID: Identifiers
Atlantic herring
ER: Environmental Regime
Brackish
TR: Input Center, ASFA
CS0402424
CL: Classification
Q1 01567 Fishery oceanography and limnology; O 1070 Ecology/Community
Studies; Q1 01422 Environmental effects; O 5020 Fisheries and Fishery
Biology
UD: Update
200402
SF: Subfile
Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources
AN: Accession Number
5730148
Record 3 of 4
DN: Database Name
ASFA: Aquatic Sciences and Fisheries Abstracts
TI: Title
Dependency of larval fish survival on retention/dispersion in food
limited environments: the Baltic Sea as a case study
AU: Author
Hinrichsen, H; Lehmann, A; Moellmann, C; Schmidt, J
AF: Affiliation
Institute of Marine Sciences, Duesternbrooker Weg 20, D-24105 Kiel,
Germany, [mailto:hhinrichsen@ifm.uni-kiel.de]
SO: Source
Fisheries Oceanography [Fish. Oceanogr.]. Vol. 12, no. 4-5, pp.
425-433. Sep 2003.
IS: ISSN
1054-6006
DE: Descriptors
Marine fish; Commercial species; Gadoid fisheries; Fish larvae;
Survival; Food availability; Marine crustaceans; Coastal waters;
Ecological distribution; Residence time; Biological drift; Dispersion;
Spawning grounds; Environmental factors; Ocean circulation;
Atmospheric circulation; Atmospheric forcing; Fishery oceanography;
Hydraulic models; Suspended particulate matter; Analytical techniques;
Gadus morhua; Pseudocalanus elongatus; ANE, Baltic Sea
AB: Abstract
A three-dimensional hydrodynamic model has been used to analyse
temporally and spatially resolved circulation patterns in the Baltic
Sea with special emphasis on drifting particles representing larval
fish. The main purpose of this study was (i) to investigate potential
drift patterns of larval fish, (ii) to identify its intra- and
inter-annual variability for time periods based on the timing of
spawning and (iii) to analyse its seasonal and spatial variability in
dependence of the atmospheric forcing conditions. For the time period
1979-1998 temporally and spatially resolved simulated flow fields were
used to describe the potential drift from the centre of main
reproductive effort of Baltic cod (Gadus morhua). The results of the
model runs demonstrate a general change in circulation pattern from
retention during a first decade (1979-1988) to dispersion in the
following decade (1989-1998). This increase in dispersion was related
to an increase in the variability of the local wind forcing conditions
over the Baltic. The more frequent occurrence of dispersion in spring
of the recent decade was accompanied by a strong decay in biomass of
one of the main larval fish feeding component in the central basin,
the calanoid copepod Pseudocalanus elongatus. Larger dispersion of
this prey organism may have affected the spatial overlap and thus the
contact rates between predator and prey. Hence, this may have resulted
in a food limitation for early life stages of Baltic cod and
potentially contributed to the pronounced shift in cod peak spawning
time from spring to late summer. Early life stages of cod originating
from late spawning fish, benefited from a stronger dispersion in late
summer and autumn, into shallow coastal areas with higher calanoid
abundance.
PB: Publisher
Blackwell Science Ltd
DO: DOI
10.1046/j.1365-2419.2003.00246.x
LA: Language
English
SL: Summary Language
English
PY: Publication Year
2003
PT: Publication Type
Journal Article
ID: Identifiers
Larval retention; Atlantic cod
ER: Environmental Regime
Brackish
TR: Input Center, ASFA
CS0402430
CL: Classification
Q1 01567 Fishery oceanography and limnology; O 1070 Ecology/Community
Studies
UD: Update
200402
SF: Subfile
Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources
AN: Accession Number
5730154
Record 4 of 4
DN: Database Name
ASFA: Aquatic Sciences and Fisheries Abstracts
TI: Title
Specific gravity and vertical distribution of sprat eggs in the Baltic
Sea
AU: Author
Nissling, A; Mueller, A; Hinrichsen, H-H
SO: Source
Journal of Fish Biology [J. Fish Biol.]. Vol. 63, no. 2, pp. 280-299.
Aug 2003.
IS: ISSN
0022-1112
DE: Descriptors
Specific gravity; Distribution records; Marine fish; Vertical
distribution; Fish eggs; Spawning seasons; Biological development;
Eggs; Sprattus sprattus; ANE, Baltic Sea; Baltic Sea
AB: Abstract
During peak spawning of sprat Sprattus sprattus in the Baltic Sea in
May-June egg specific gravity averaged plus or minus s.d. 1 times
00858 plus or minus 0 times 00116 g cm super(-3) but was significantly
higher in the beginning and significantly lower towards the end of the
spawning season. A close relationship was found between egg diameter
and egg specific gravity (r super(2) = 0 times 71). This relationship,
however, changed during the spawning season indicating that some other
factor was involved causing the decrease in specific gravity during
the spawning period. The vertical egg distribution changed during the
spawning season: eggs were distributed mainly in the deep layers early
in the season, occurred in and above the permanent halocline during
peak spawning, and above the halocline towards the end of the spawning
season. Consequently, poor oxygen conditions in the deep layers and
low temperatures in layers between the halocline and the developing
thermocline may affect egg development. Thus, opportunities for egg
development vary over the spawning season and among spawning areas,
and depending on frequency of saline water inflows into the Baltic Sea
and severity of winters, between years.
LA: Language
English
SL: Summary Language
English
PY: Publication Year
2003
PT: Publication Type
Journal Article
ID: Identifiers
Sprat
ER: Environmental Regime
Marine
TR: Input Center, ASFA
CS0405344
CL: Classification
Q1 01342 Geographical distribution; O 1050 Vertebrates, Urochordates
and Cephalochordates; D 04668 Fish
UD: Update
200403
SF: Subfile
ASFA 1: Biological Sciences & Living Resources; Oceanic Abstracts;
Ecology Abstracts
AN: Accession Number
5751477
