Abstract
Two emergence trap designs were tested in Mono Lake, California, to measure in situ hatching of Artemia monica cysts on the lake bottom. One design incorporated a removable sample bottle; the other had a catch tube which was pumped from the surface. Both traps rested on the bottom and had a narrow gap between the collecting funnel and bottom flange to allow the chemical conditions within the trap to be similar to those outside. This gap was open during April and May but, because some animals entered from outside the area enclosed by the trap, the gap was covered with 400 µm or 800 µm screen during June and July. The two trap types without screens sampled a station in oxic water 7 m deep similarly in April and May 1985. Mean daily hatching rates from April to May 1985 ranged from 720 to 25 340 shrimp m-2 day-1. In contrast, mean daily hatching rates during the same period at a station in anoxic water 21 m deep were from 3 to 138 shrimp m-2 day-1. June and July hatching rates in the shallow station were lower than in the spring, usually less than 1000 shrimp m-2 day-1.
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© 1988 Dr W. Junk Publishers, Dordrecht
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Dana, G.L., Foley, C.J., Starrett, G.L., Perry, W.M., Melack, J.M. (1988). In situ hatching of Artemia monica cysts in hypersaline Mono Lake, California. In: Melack, J.M. (eds) Saline Lakes. Developments in Hydrobiology, vol 44. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3095-7_13
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DOI: https://doi.org/10.1007/978-94-009-3095-7_13
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