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Full-Text Articles in Physical Sciences and Mathematics
Characteristics Of Shark Bycatch Observed On Pelagic Longlines Off The Southeastern United States, 1992-2000, Lawrence R. Beerkircher, Enric Cortes, Mahmood S. Shivji
Characteristics Of Shark Bycatch Observed On Pelagic Longlines Off The Southeastern United States, 1992-2000, Lawrence R. Beerkircher, Enric Cortes, Mahmood S. Shivji
Marine & Environmental Sciences Faculty Articles
Data collected by fisheries observers aboard U.S. pelagic longline vessels were examined to quantify and describe elasmobranch bycatch off the southeastern U.S. coast (lat. 22°-35°N, long. 71°-82°W). From 1992 to 2000, 961 individual longline hauls were observed, during which 4,612 elasmobranchs (15% of the total catch) were documented. Of the 22 elasmobranch species observed, silky sharks, Carcharhinus falciformis, were numerically dominant (31.4% of the elasmobranch catch). The catch status of the animals (alive or dead) when the gear was retrieved varied widely depending on the species, with high mortalities seen for the commonly caught silky and night, C. signatus …
In Situ Observations On Three Species Of Large-Finned Deep-Sea Squids, M. Vecchione, C. F. E. Roper, Edith A. Widder, Tamara M. Frank
In Situ Observations On Three Species Of Large-Finned Deep-Sea Squids, M. Vecchione, C. F. E. Roper, Edith A. Widder, Tamara M. Frank
Marine & Environmental Sciences Faculty Articles
The manned submersible Johnson Sea-Link II was used for a series of dives on the continental slope of the eastern Gulf of Mexico in September 1995. The deep-sea squids Mastigoteuthis hjorti Chun, 1913 and Octopoteuthis megaptera (Verrill, 1885) were repeatedly observed at depths of 600–850 m. Both species were videotaped alive, in situ, for the first time during these dives. These species share the characteristic of very large fins, almost as long as the mantle length, but their swimming behavior observed in the vicinity of the submersible differed greatly. Throughout most of the videotaped sequences of O. megaptera, it …
Artificial Keys To The Genera Of Living Stalked Crinoids (Echinodermata), Michel Roux, Charles G. Messing, Nadia Améziane
Artificial Keys To The Genera Of Living Stalked Crinoids (Echinodermata), Michel Roux, Charles G. Messing, Nadia Améziane
Marine & Environmental Sciences Faculty Articles
Two practical, illustrated, dichotomous keys to the 29 genera of living stalked crinoids are provided: one for entire animals and one for stalk ossicles and fragments. These are accompanied by (1) an overview of taxonomically important morphology, and (2) an alphabetical list by family and genus of the ∼95 nominal living species and their distribution by region. This is the first compilation of such data for all living stalked crinoids since Carpenter (1884) recognized 27 species in six genera in his monograph based on the H.M.S. CHALLENGER Expedition collection.
Fish Assemblages Associated With Artificial Reefs Of Concrete Aggregates Or Quarry Stone Offshore Miami Beach, Florida, Usa, Brian K. Walker, Bruce Henderson, Richard E. Spieler
Fish Assemblages Associated With Artificial Reefs Of Concrete Aggregates Or Quarry Stone Offshore Miami Beach, Florida, Usa, Brian K. Walker, Bruce Henderson, Richard E. Spieler
Marine & Environmental Sciences Faculty Articles
Few studies have compared the suitability of different artificial reef construction materials in terms of their efficacy in acquiring diverse faunal assemblages. We compared the fishes associated with 12 co-located reefs constructed of limestone quarry boulders, concrete-gravel aggregate, or concrete-tire aggregate (four of each substrate) in 7 m of water, 200 m offshore Miami Beach, Florida, USA. All 12 reefs were deployed 100 m apart the same day in two lines of six. The four quarry stone reefs consist of a pile of 50 boulders each. The remaining eight reefs, of concrete-gravel aggregate and concrete-tire aggregate, were each constructed with …