Feeding has the largest effect on the ammonia excretion rate of the southern rock lobster, Jasus edwardsii, and the western rock lobster, Panulirus cygnus

Effect of temperature on physiology and bioenergetics of adult Harris mud crab Rhithropanopeus harrisii (Gould, 1841) from the southern Baltic Sea

“…The increase in the temperature by 5°C caused an increase in all physiological rates studied in R. harrisii, except the ammonia excretion rate in starved specimens. It is a little bit surprising, because according to the literature, the rate of ammonia excretion in many crustaceans increases with the temperature (Regnault 1987, Chen & Chia 1996, Crear & Forteath 2002. In general, the temperature rise leads to an increase in locomotor activity and thereby to overall metabolic activity (Wallace 1973, Wyban et al 1995.…”

A Global Review of Spiny Lobster Aquaculture

“…The studies were wide ranging and included oxygen consumption (Crear & Forteath 2000, 2001a; production of ammonia (Crear & Forteath 2002 ); effect of photoperiod on growth and survival , comparison of wild and cultured adults for growth, sensory analysis and oil composition . Oliver & MacDiarmid (2000) examined blood refractive index and weight/carapace length ratios as indices of condition in juveniles.…”

Treatise on Zoology - Anatomy, Taxonomy, Biology. The Crustacea, Volume 9 Part A

“…Water is primarily absorbed through the gills to balance urine flow, although it can also be taken up by the gut (Malley, 1977a, b). Temperature strongly influences the rate of ammonia excretion, with higher temperatures resulting in greater excretion rates (Regnault, 1987); however, temperature can affect the ratio of ammonia versus urea and amino acid excretion (Crear & Forteath, 2002). Feeding significantly increases the amount of ammonia excretion (Zoutendyk, 1987) with a large peak in excretion ∼7 hr post-feeding and a smaller peak after 18 hr (Crear & Forteath, 2002).…”

“…Temperature strongly influences the rate of ammonia excretion, with higher temperatures resulting in greater excretion rates (Regnault, 1987); however, temperature can affect the ratio of ammonia versus urea and amino acid excretion (Crear & Forteath, 2002). Feeding significantly increases the amount of ammonia excretion (Zoutendyk, 1987) with a large peak in excretion ∼7 hr post-feeding and a smaller peak after 18 hr (Crear & Forteath, 2002). In some species, a daily rhythm of excretion is evident, with more ammonia being excreted at night than during the day, when activity levels and oxygen consumption are higher; in other species, no such rhythm is apparent (Crear & Forteath, 2002).…”

“…Feeding significantly increases the amount of ammonia excretion (Zoutendyk, 1987) with a large peak in excretion ∼7 hr post-feeding and a smaller peak after 18 hr (Crear & Forteath, 2002). In some species, a daily rhythm of excretion is evident, with more ammonia being excreted at night than during the day, when activity levels and oxygen consumption are higher; in other species, no such rhythm is apparent (Crear & Forteath, 2002).…”