| Titre : | Abundance and size of larval fishes outside the entrance to Beaufort Inlet, North Carolina |
| Auteurs : | W. F. Hettler, Auteur ; J. A. Hare, Auteur |
| Type de document : | Article |
| Dans : | Estuaries (21(3) SEP 1998) |
| Article en page(s) : | 476-499 |
| Résumé : | Synoptic ichthyoplankton sampling was conducted on two transects, one on either side of Beaufort Inlet, North Carolina, during the winter immigration season of seven ocean-spawned, estuarine-dependent fishes; Brevoortia tyrannus (Atlantic menhaden), Leiostomus xanthurus (spot), Micropogonias undulatus (Atlantic croaker), lagodon rhomboides (pinfish), Paralichthys albigutta (Gulf flounder), P. dentatus (summer flounder), and Ei lethostigma (southern flounder). Densities and lengths of larvae were significantly different among sampling dates, with distance offshore, and between sides of the inlet. Flood-tide stage had minimal effect on larval densities and lengths except for P. albigutta and P. lethostigma. Changes in larval densities with distance offshore were not coherent among species; densities of B. tyrannus increased offshore whereas densities of the other species decreased offshore. Average larval densities on a sampling date were coherent among species. Patterns in larval lengths were also coherent among the four non-pounder species. Larval densities outside of Beaufort Inlet were correlated with larval densities inside of Beaufort Inlet. Larval densities outside of Beaufort Inlet were also correlated with the north component of the wind, nearshore water temperature, and distance to the mid-shelf front. Differences in larval density across the inlet were significantly correlated with the east component of the wind. The patterns in larval densities outside of Beaufort Inlet were complex and apparently influenced by both the physical processes that supply larvae to the nearshore region and nearshore physical dynamics. |
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