Monday, October 15, 2007

Journal Articles of Reference

Houghton, J.D.R. Doyle, T.K. Davenport. J. Lilley, M.K.S. Wilson, R.P. Hays, G.C. 2007. Stranding events provide indirect insights into the seasonality and persistence of jellyfish medusae (Cnidaria: Scyphozoa). Hydrobiologia 589:1-13.
-What is the seasonality and reproductive strategy of jellyfish? If the bell diameter or net weight of stranded medusae was increased over time is this a single reproductive group or does this suggest the release of ephyrae over many months? Also are the jellyfish over wintered as pelagic medusa as previously reported?
-3 different species were recorded (C. capillata, C. hysoscella, R. octopus) at 5 sites over a 3 year period. Bell diameter was measured at a random sample of the first 50 jellyfish encountered from the last incoming tide. Using equations the wet weight was derived for each measurement.
- The broad range of size and weight found over all sites suggests that the release of ephyrae may be lengthened and individuals of all sizes are in the water coulomb during summer months. Evidence also showed that there is over wintering involved in rhizostome jellyfish that gives these species an advantage to the early year prey.

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