Spatial and Temporal Variation in Otolith Chemistry for Tautog (Tautoga onitis) along the US Northeast Coast

2012 ◽  
Vol 19 (2) ◽  
pp. 201-216 ◽  
Author(s):  
Ivan Mateo ◽  
Edward G. Durbin ◽  
David A. Bengtson ◽  
Richard Kingsley ◽  
Peter K. Swart ◽  
...  
Keyword(s):  
Temporal Variation ◽  
Spatial And Temporal Variation ◽  
Otolith Chemistry ◽  
The Us ◽  
Us Northeast ◽  
Northeast Coast

scholarly journals Simulation of Hurricane Loading for Proposed Offshore Windfarms off the US Northeast Coast

2020 ◽  
Vol 1452 ◽  
pp. 012026
Author(s):  
Boma Kresning ◽  
M Reza Hashemi ◽  
Clara Gallucci
Keyword(s):  
The Us ◽  
Us Northeast ◽  
Northeast Coast

Party and the Dynamics of Congressional Committee Composition in the US House, 1947–96

2003 ◽  
Vol 33 (4) ◽  
pp. 659-679 ◽  
Author(s):  
GARRY YOUNG ◽  
VALERIE HEITSHUSEN
Keyword(s):  
Time Series ◽  
Temporal Variation ◽  
Cross Section ◽  
Spatial And Temporal Variation ◽  
Congressional Committee ◽  
Majority Party ◽  
The Us ◽  
Resource Levels ◽  
Section Analysis

Renewed scholarly interest in the role of US congressional parties has recently coincided with a continuing interest in legislative committee influence and the extent to which that influence relies on committee preference composition. We argue that majority party incentives to influence composition vary by committee salience and party margins. In turn, the party’s ability to influence composition of salient committees is constrained, but varies by party resource levels. We present data on committee composition for the 80th to 104th US Houses and test these expectations using time-series cross-section analysis. The evidence provides support for the predictions – which have been hypothesized or tested anecdotally but have not heretofore been systematically tested – explaining both spatial and temporal variation.

scholarly journals Spatial and temporal variation in the natal otolith chemistry of a Hawaiian reef fish: prospects for measuring population connectivity

2008 ◽  
Vol 65 (6) ◽  
pp. 1181-1192 ◽  
Author(s):  
Benjamin I. Ruttenberg ◽  
Scott L. Hamilton ◽  
Robert R. Warner
Keyword(s):  
Temporal Variation ◽  
Reef Fish ◽  
Larval Dispersal ◽  
Significant Variation ◽  
Population Connectivity ◽  
Marine Ecology ◽  
Spatial And Temporal Variation ◽  
Otolith Chemistry ◽  
Methodological Development ◽  
Larval Connectivity

One of the most compelling unanswered questions in marine ecology is the extent to which local populations are connected via larval exchange. Recent work has suggested that variation in the chemistry of otoliths (earstones) of fishes may function as a natural tag, potentially allowing investigators to determine sources of individual larvae and estimate larval connectivity. We analyzed the spatial and temporal variation in natal otolith chemistry of a benthic-spawning reef fish from the Hawaiian Islands. We found no consistent chemical variation at the largest scale (>100 km, among islands), but found significant variation at moderate scales (sites within islands, tens of kilometres) and small scales (clutches within sites), and chemistry of otoliths was not stable between years. These results imply that we may be able to use otolith chemistry to track larval dispersal only if the scales of dispersal match those of variation in natal otolith chemistry, and that separate natal otolith collections may be needed to track different cohorts of larvae. Finally, we found that elemental composition of recruit cores often did not match that of natal otoliths, suggesting that additional methodological development is required before we can effectively apply methods in otolith chemistry to the study of larval dispersal.

Temporal and spatial variability in elemental composition of otoliths: implications for determining stock identity and connectivity of populations

2002 ◽  
Vol 59 (4) ◽  
pp. 669-679 ◽  
Author(s):  
Bronwyn M Gillanders
Keyword(s):  
Temporal Variation ◽  
Elemental Composition ◽  
Juvenile Fish ◽  
Spatial And Temporal Variation ◽  
Otolith Chemistry ◽  
Temporal And Spatial Variability ◽  
Spatial Differences ◽  
Elemental Fingerprint ◽  
Temporal And Spatial ◽  
Over Time

Interannual variability in elemental composition of otoliths may confound spatial interpretations. The elemental fingerprints of otoliths of juvenile fish were determined for fish collected from 12 to 15 estuaries in each of three consecutive recruitment years to determine temporal variation in otolith chemistry for each estuary. It was also examined whether there is overlap in elemental fingerprints of fish collected in different years and from different estuaries that may confound subsequent spatial comparisons. Significant differences in otolith chemistry were found among years for individual elements (lithium, manganese, strontium, and barium) and for multi-element fingerprints. Some estuaries showed large variation in multi-element fingerprints among years, whereas others showed little variation among years. There was some overlap of elemental fingerprints of different estuaries, but these were not always for fish collected in the same year. The significant spatial and temporal variation in elemental fingerprints meant that it was possible to confound spatial differences with temporal differences. Therefore, if the natal estuary of the adults is to be determined, a library of elemental fingerprints needs to be built up over time for each estuary rather than a single year-class of juveniles being used as the elemental fingerprint for a number of year-classes of adults.

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