Secondary production of Ampelisca mississippiana Soliman and Wicksten 2007 (Amphipoda, Crustacea) in the head of the Mississippi Canyon, northern Gulf of Mexico |
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Authors: | Y.S. Soliman G.T. Rowe |
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Affiliation: | aDepartment of Oceanography, College of Geosciences, Texas A&M University, College Station, TX 77843-3146, USA;bDepartment of Marine Biology, Texas A&M University at Galveston, Galveston, TX 77551-5923, USA |
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Abstract: | Annual production was calculated for the dominant ampeliscid amphipod Ampelisca mississippiana [Soliman, Y., Wicksten, M., 2007. Ampelisca mississippiana a new species (Amphipoda: Gammaredea) dominated the head of the Mississippi Canyon (Northern Gulf of Mexico). Zootaxa, submitted] at the head of the Mississippi Canyon in the northern Gulf of Mexico. Average densities were 12,094±2499 ind m−2, with secondary production of 6.93 g dry wt m−2 yr−1, based on the “size-frequency method” [Hynes-Hamilton, H.B.N., Coleman, M., 1968. A simple method for assessing the annual production of stream benthos. Limnology and Oceanography 13, 569–573; Menzies, C.A., 1980. A note on the Hynes-Hamilton method of estimating secondary production. Limnology and Oceanography 25(4), 770–773], with a production/biomass (P/B) ratio of 3.11. Growth rates of this magnitude are comparable to available data for freshwater and shallow marine ampeliscids, but are unexpectedly high for deep-ocean habitats. Growth efficiency appeared to be approximately 35% (Growth/Assimilation×100). |
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Keywords: | Secondary production Amphipoda Deep-sea benthos Mississippi Canyon Gulf of Mexico |
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