Sherlock, R. E.. MBARI, robshrlk@mbari.org
Robison, B. E.. MBARI, robr@mbari.org

 
EFFECTS OF TEMPERATURE ON THE DEVELOPMENT AND SURVIVAL OF NANOMIA BIJUGA (HYDROZOA, SIPHONOPHORA)
 
Temperature is known to govern the development rate and survival of marine invertebrates. However, the effects of temperature on development have been studied largely in benthic species. For this study, gametes were collected from Nanomia bijuga, a mesopelagic siphonophore, and self-crossed. Fertilized eggs were allocated between two temperature treatments: 12 and 8 C. Larvae were preserved after 2, 4, 6 and 9 days of development for analysis with SEM. Larvae developed more slowly at colder temperatures. A concurrent experiment compared larval survival. Eggs were collected from a second colony and placed in four temperature treatments: 4 8 , 12 , and 18 C. Larvae developed normally in all treatments, and survived longer at lower temperatures. Food constraints, as opposed to temperature, likely limited survival at higher temperatures.
 
Day: Thursday, Feb. 4
Time: Poster
Location: Sweeney Center
 
Code: SS26TH1462S