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Persistent near-bottom aggregations of mesopelagic animals along the North Carolina and Virginia continental slopes

Marine Biology

By:
, , ,
DOI: 10.1007/s00227-007-0855-1

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Abstract

Submersible observations during four missions over the North Carolina and Virginia continental slopes (184-900 m) documented the occurrence of large aggregations of mesopelagic fishes and macronektonic invertebrates near or on the bottom. Aggregated mesopelagics formed a layer up to tens of meters deep positioned from a few centimeters to 20 m, usually <10 m, above the substrate. Aggregations were numerically dominated by microvores, notably the myctophid fish Ceratoscopelus maderensis and the penaeid shrimp Sergestes arcticus. Consistently present but in relatively lower numbers, were mesopelagic predators, including the paralepidids Notolepis rissoi and Lestidium atlanticum, the eel Nemichthys scolopaceus, the stomiid fishes Chauliodus sloani and Stomias boa ferox, and squids Illex spp. Near-bottom aggregations do not appear to be an artifact due to attraction to the submersible. Based on submersible observations in three areas in 4 years spanning a decade, near-bottom aggregations of midwater organisms appear to be a geographically widespread and persistent phenomenon along the continental slope of the southeastern US Aggregations may exploit areas of enhanced food resources at the bottom. ?? 2007 Springer-Verlag.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Persistent near-bottom aggregations of mesopelagic animals along the North Carolina and Virginia continental slopes
Series title:
Marine Biology
DOI:
10.1007/s00227-007-0855-1
Volume
153
Issue:
5
Year Published:
2008
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
825
Last page:
841
Number of Pages:
17