User:Mikehuang99/P. Sedentaria

(Diebel 1988)

P. Sedentaria utilize plankton salps for transportation and laying young.

Diurnal vertical migration patterns.

Form symbiotic relationships with gelatinous organisms like plankton for feeding and rearing purposes. Make houses from salps by consuming their inner organs and carving the inner walls with their pereiopods. Competition among females for control of barrels has been observed. Preferentially feed during nighttime.

(Elder 2015)

Reside in cold deep water during the day and forage at shallow warm waters at night. Experience temperature changes ranging up to 17 degrees Celsius throughout the day with 8 C being the lowest and 25 C the highest. When tested at 29 C, only half of P. sedentaria survived. They also displayed increased lactate production (anaerobic respiration) and heat shock proteins compared to those tested at temperatures in their normal range despite ample oxygen supply. This indicates susceptibility to suboptimal physiological functioning and compensatory processes in response to warmer climate. Typically migrate from surface to 200-350 meters deep waters throughout the day.

(Ball 1977).

P. sedentaria contain 4 eyes, two lateral and two transparent medial eyes on top of its head.

Pyrosoma, Doliolum, and Salpa are the most common species of plankton salps that P. sedentaria make barrels out of. Primarily consume nematocysts and siphonophores. Common predators include albacore and tuna fish. Female P. sedentaria lay up to 600 eggs at a time.