LARVAL DISTRIBUTIONS AND THE SPATIAL PATTERNS OF SETTLEMENT OF AN OYSTER REEF FISH - RESPONSES TO FLOW AND STRUCTURE

被引:110
作者
BREITBURG, DL [1 ]
PALMER, MA [1 ]
LOHER, T [1 ]
机构
[1] UNIV MARYLAND, DEPT ZOOL, COLLEGE PK, MD 20742 USA
关键词
BEHAVIOR; CHESAPEAKE BAY; FISH LARVAE; GOBY; HYDRODYNAMICS; OYSTER REEF; RECRUITMENT;
D O I
10.3354/meps125045
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
A combination of larval behavior and physical factors influence the spatial patterns of settlement of marine organisms. Of particular importance to the settlement process is the blend of passive transport and active responses to water flow near the settlement habitat. Field experiments with the naked goby Gobiosoma bose, a benthic oyster reef fish, indicated that larvae aggregate in low-flow areas on the downcurrent sides of rocks, and shift position with changing flow directions. Larger aggregations of larvae were found in downcurrent positions at rocks that created larger low-flow zones, and during parts of the tidal cycle with higher ambient flow velocities. Settlement occurred in a highly aggregated pattern that reflected larval distributions, Most settlement measured in a field experiment was adjacent to downcurrent sides of rocks rather than in other positions near rocks, or away from structures that would decrease downcurrent now velocities. These results suggest that the active response of fish larvae to either direct or indirect effects of now on reefs may be important to fine-scale spatial patterns of settlement. Because zooplankton densities downcurrent of rocks were similar to, or lower than, densities upcurrent and lateral to rocks, spatial distributions of prey are unlikely to explain larval distributions. Instead, active preference for low-flow areas may enable fish larvae to maintain their position on oyster reefs, the preferred settlement habitat.
引用
收藏
页码:45 / 60
页数:16
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