Journal ArticleDOI
Influence of surface slicks on the distribution and onshore movements of small fish
Michael J. Kingsford,J. H. Choat +1 more
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It is suggested that fish settlement patterns need to be investigated concurrently with measurements of physical mechanisms which may promote aggregation, and onshore movements of small fish (e.g. internal waves).Abstract:
The surface slicks of internal waves were sampled in continental shelf waters off the east coast of Northland, New Zealand, from 1982–1985. Densities of small fish and zooplankton from surface waters were higher in slicks than in the rippled water adjacent to them. Presettlement fish, of species found as adults nearshore, were abundant in ichthyoplankton samples and visual counts from slicks. These fish ranged from fish with primordial fins to those with adult fin-ray counts. Some small reef fish aggregated around drift algae. Drift algae were also abundant in slicks. Slicks moved at 0.5 to 1.25 km h-1 in the direction of shore. Hence, a consequence of aggregation in slicks is that presettlement fish may be transported onshore. When slicks were absent, drift algae were found in scattered patches at different distances from shore. In the presence of slicks algae were aligned in them. Internal waves, therefore, may have the ability to turn scattered distributions into regular patterns. Because the surface slicks that internal waves produce are common coastal features, we should modify our perspective of how small fish and zooplankton are distributed in local water masses. Furthermore, the occurrence of internal waves should influence the way in which surface waters are sampled. We suggest that fish settlement patterns need to be investigated concurrently with measurements of physical mechanisms which may promote aggregation, and onshore movements of small fish (e.g. internal waves). These waves may contribute to the variability in settlement rates of small fish.read more
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Book ChapterDOI
The Ecology of Rafting in the Marine Environment. II. The Rafting Organisms and Community
Martin Thiel,Lars Gutow +1 more
TL;DR: All available evidence suggests that rafting is an important process for the population dynamics of many organisms and that it also has had and continues to have a strong influence on coastal biodiversity.
Journal Article
Predicting self-recruitment in marine populations: biophysical correlates
Su Sponaugle,Robert K. Cowen,Alan L. Shanks,Steven G. Morgan,Leis J.M,Jesús Pineda,Boehlert G.W,Michael J. Kingsford,Kenyon C. Lindeman,Grimes C,James Munro +10 more
TL;DR: It is concluded that physical factors that result in a departure from unidirectional, depth-uniform water flow provide the opportunity for retention of larvae, and therefore of self-recruitment.
Journal ArticleDOI
Topographically Controlled Fronts in the Ocean and Their Biological Influence
Eric Wolanski,William M. Hamner +1 more
TL;DR: Topographically generated fronts affect the distribution of sediments, and they aggregate waterborne eggs, larvae, and plankton, which influences the distribution and density of benthic assemblages and of pelagic secondary and tertiary predators.
Journal ArticleDOI
Consequences of surf-zone turbulence for settlement and external fertilization
Mark W. Denny,Mark F. Shibata +1 more
TL;DR: The models presented here predict that surf-zone turbulence can have important consequences for wave-swept organisms and hope that they will stimulate discussion of and research into the many important biological consequences of nearshore turbulence.
Journal Article
Predicting self-recruitment in marine populations: Biophysical correlates and mechanisms
Su Sponaugle,Robert K. Cowen,Alan L. Shanks,Steven G. Morgan,Jeffrey M. Leis,Jesús Pineda,George W. Boehlert,Michael J. Kingsford,Kenyon C. Lindeman,Churchill Grimes,John L. Munro +10 more
TL;DR: In this article, the authors evaluate direct and indirect evidence to predict the relationship between these biophysical variables and the degree of self-recruitment in benthic marine organisms.
References
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A. R. Osborne,T. L. Burch +1 more
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