Abstract
Neomysis mercedis (Holmes) has a diel vertical migration pattern that interacts with two-layered estuarine flow and a turbid entrapment zone to keep the population from being swept out of the upper Sacramento-San Joaquin Estuary. In the entrapment zone mysids are found near surface on all night tides but are present at that level during day only on flood tides. In the clearer water downstream from the entrapment zone mysids are not found near surface during day. In both locations a higher percentage of juveniles than adults are near surface. Individuals swept downstream from the entrapment zone in the seaward moving surface layer are apparently transported back upstream via the bottom density current. Thus, the population circulates both vertically and longitudinally but there is no net seaward movement except in response to changes in location of the entrapment zone. Due to their greater near surface abundance on flood tides which move them upstream, neonates are less abundant than adults seaward of the entrapment zone.
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Arthur, J. E. & M. D. Ball, 1979. Factors influencing the entrapment of suspended material in the San Francisco Bay-Delta estuary. In: T. J. Conomos (ed.), San Francisco Bay; the urbanized estuary, Pac. Div. am. Ass. Adv. Sci., S. Francisco, Calif.: 143–176.
Beeton, A. M., 1960. The vertical migration of Mysis relicta in lakes Huron and Michigan. J. Fish. Res. Bd Can. 17: 517–539.
Beeton, A. M. & J. A. Bowers, 1982. Vertical migration of Mysis relicta Loven. In: M. D. Morgan (ed.), Ecology of mysidacea. Dr. W. Junk B.V. Publishers, The Hague, Boston, Lond.: 53–62.
California Department of Public Works, 1931. Variation and control of salinity in Sacramento-San Joaquin Delta and upper San Francisco Bay. Calif. Dep. publ. Wks Bull. 27, 440 pp.
Clutter, R. I., 1969. The microdistribution and social behavior of some pelagic mysid shrimps. J. exp. mar. Biol. Ecol. 3: 125–155.
Conomos, T. J. & D. H. Peterson, 1977. Suspended particle transport and circulation in San Francisco Bay: an overview. In: M. Wiley (ed.), Estuarine Processes, 2. Circulation, sediments and transfer of material in the estuary. Academic Press. N.Y. S. Francisco, Lond.: 82–97.
Heubach, W., 1969. Neomysis awatchensis in the Sacramento-San Joaquin estuary. Limnol. Oceanogr. 14: 533–546.
Knutson, A. C. Jr. & J. J. Orsi, 1983. Factors regulating abundance and distribution of the shrimp Neomysis mercedis in the Sacramento-San Joaquin Estuary. Trans. am. Fish. Soc. 112: 476–485.
Mauchline, J., 1970. The biology of Schistomysis ornata (Crustacea, Mysidacea). J. mar. biol. Ass. U.K. 50: 169–175.
Mauchline, J., 1980. The biology of Mysids and Euphausiids. Adv. mar. Biol. Academic Press, Lond. 18, 681 pp.
Orsi, J. J. & A. C. Knutson, Jr., 1979. The role of mysid shrimp in the Sacramento-San Joaquin estuary and factors affecting their abundance and distribution. In: T. J. Conomos (ed.), San Francisco Bay: the urbanized estuary. Pac. Div. am. Ass. Adv. Sci., S. Francisco, Calif.: 401–408.
Orsi, J. J., A. C. Knutson Jr. & A. W. Fast, 1979. An extension of the known range of Neomysis mercedis, the opossum shrimp. Calif. Fish Game 65: 127–130.
Peterson, D. H., T. J. Conomos, W. W. Broenkow & P. C. Doherty, 1975. Location of the non-tidal curren't null zone in northern San Francisco Bay. Estuar. coast. mar. Sci. 3: 1–11.
Rice, A. L., 1961. The responses of certain mysids to changes in hydrostatic pressure. J. exp. Biol. 38: 391–401.
Siegfried, C. A., M. E. Kopache & A. W. Knight, 1979. The distribution and abundance of Neomysis mercedis in relation to the entrapment zone in the western Sacramento-San Joaquin delta. Trans. am. Fish. Soc. 108: 262–268.
Sitts, R. M. & A. W. Knight, 1979. Predation by the estuarine shrimps Crangon franciscorum and Palaemon macrodactylus Rathbun. Biol. Bull. 156: 356–368.
(USDC) United States Department of Commerce, National Oceanic and Atmospheric Administration, National Ocean Survey, 1980. Tidal current Tables, Pacific Coast of North America and Asia. Rockville, Maryland, 255 pp.
(USDC) United States Department of Commerce, National Oceanic and Atmospheric Administration, National Ocean Survey, 1981. Tidal current Tables, Pacific Coast of North American and Asia. Rockville, Maryland, 260 pp.
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Orsi, J.J. Interaction between diel vertical migration of a mysidacean shrimp and two-layered estuarine flow. Hydrobiologia 137, 79–87 (1986). https://doi.org/10.1007/BF00004175
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DOI: https://doi.org/10.1007/BF00004175