Respiratory pumping in Aplysia fasciata in natural and artificial tide pools

1996 ◽  
Vol 180 (1) ◽  
pp. 81-89 ◽  
Author(s):  
M. Levy ◽  
I. Levy ◽  
A. J. Susswein
Keyword(s):  
Respiratory Pumping ◽  
Aplysia Fasciata

Relationship Between Respiratory Pumping and Oxygen Consumption in Aplysia Depilans and Aplysia Fasciata

1989 ◽  
Vol 141 (1) ◽  
pp. 389-405
Author(s):  
MIRIAM LEVY ◽  
YAIR ACHITUV ◽  
ABRAHAM J. SUSSWEIN
Keyword(s):  
Oxygen Consumption ◽  
Inverse Function ◽  
Severe Hypoxia ◽  
Basal Rate ◽  
Turbulent Environments ◽  
Rate Of Oxygen Consumption ◽  
Respiratory Pumping ◽  
Aplysia Fasciata ◽  
Animal Mass ◽  
Insight Into

Respiratory pumping in Aplysia is a well-characterized behaviour controlled by identified neurones, but its function is unknown. To gain insight into the function of this behaviour, respiratory pumping and oxygen consumption were examined under identical conditions, in Aplysia fasciata Poiret and in A. depilans Gmelin. A. fasciata is found in less turbulent environments than is A. depilans, suggesting that control of respiratory pumping may differ in the two species. Rates of respiratory pumping and oxygen consumption were poorly correlated. The basal rate of respiratory pumping was similar in both species and was not significantly dependent on animal mass, but the resting rate of oxygen consumption was higher in A. depilans than in A. fasciata and was an inverse function of animal mass in both species. Brief, moderate hypercapnia led to an increase in oxygen consumption in both Aplysia species. In A. fasciata, the increase was much greater. Increase in oxygen consumed was not accompanied by changes in the rate of respiratory pumping. Longer, more severe periods of hypercapnia led to decreases in oxygen consumption in both Aplysia species, and an increase in the rate of respiratory pumping. Decreased oxygen consumption was more gradual in A. fasciata. Severe hypoxia produced a decrease in the rate of oxygen consumed, and an increase in the rate of respiratory pumping.

scholarly journals Separate Effects of a Classical Conditioning Procedure on Respiratory Pumping, Swimming, and Inking in Aplysia fasciata

1999 ◽  
Vol 6 (1) ◽  
pp. 21-36 ◽  
Author(s):  
Miriam Levy ◽  
Abraham J. Susswein
Keyword(s):  
Classical Conditioning ◽  
Neural Pathways ◽  
Conditioning Procedure ◽  
Defensive Responses ◽  
Defensive Behaviors ◽  
Respiratory Pumping ◽  
Noxious Stimuli ◽  
Aplysia Fasciata ◽  
Open Versus ◽  
Classical Conditioning Procedure

We examined whether swimming and inking, two defensive responses in Aplysia fasciata, are facilitated by a classical conditioning procedure that has been shown to facilitate a third defensive response, respiratory pumping. Training consisted of pairing a head shock (UCS) with a modified seawater (85%, 120%, or pH 7.0 seawater—CSs). Animals were tested by re-exposing them to the same altered seawater 1 hr after the training. For all three altered seawaters, only respiratory pumping is specifically increased by conditioning. Swimming is sensitized by shock, and inking is unaffected by training, indicating that the conditioning procedure is likely to affect a neural site that differentially controls respiratory pumping. Additional observations also indicate that the three defensive responses are differentially regulated. First, different noxious stimuli preferentially elicit different defensive responses. Second, the three defensive responses are differentially affected by shock. Inking is elicited only immediately following shock, whereas swimming and respiratory pumping are facilitated for a period of time following the shock. Third, swimming and respiratory pumping are differentially affected by noxious stimuli that are delivered in open versus closed environments. These data confirm that neural pathways exist that allowAplysia to modulate separately each of the three defensive behaviors that were examined.

A Preparation of Aplysia Fasciata For Intrasomatic Recording and Stimulation of Single Neurones During Locomotor Movements

1971 ◽  
Vol 54 (3) ◽  
pp. 659-676
Author(s):  
R. G. DE WEEVERS
Keyword(s):  
Ganglion Cells ◽  
Pedal Ganglion ◽  
Preliminary Results ◽  
Single Neurones ◽  
Sensory Responses ◽  
Motor Cells ◽  
Aplysia Fasciata ◽  
Pleural Ganglion ◽  
Somatic Musculature ◽  
Stimulation Of

1. Methods are described for suspending and clamping Aplysia fasciata so as to permit intrasomatic recording from neurones of the head ganglia during locomotor and other behavioural activities. 2. Sensory responses of neurones in the pedal ganglion are classified into four main types, all being distinct from those of pleural ganglion cells. 3. The pedal ganglion may well contain ‘motor cells’ for the greater part of the somatic musculature. 4. Preliminary results suggest that the pleural LGC may be involved in promoting a change from swimming to creeping behaviour.

Effects of food and mates on time budget in Aplysia fasciata: Integration of feeding, reproduction, and locomotion

1991 ◽  
Vol 55 (1) ◽  
pp. 68-85 ◽  
Author(s):  
Israel Ziv ◽  
Sylvia Markovich ◽  
Cornel Lustig ◽  
Abraham J. Susswein
Keyword(s):  
Time Budget ◽  
Aplysia Fasciata

Transglycosylation reactions performed by glycosyl hydrolases from the marine anaspidean mollusc Aplysia fasciata

2004 ◽  
Vol 30 (2) ◽  
pp. 51-59 ◽  
Author(s):  
Assunta Giordano ◽  
Giuseppina Andreotti ◽  
Ernesto Mollo ◽  
Antonio Trincone
Keyword(s):  
Glycosyl Hydrolases ◽  
Aplysia Fasciata

Hydrosoluble Antioxidants by Enzymatic Glucosylation of a Vitamin E Derivative Using Marine α-d-Glucosidase from Aplysia fasciata

2011 ◽  
Vol 13 (4) ◽  
pp. 773-781 ◽  
Author(s):  
Annabella Tramice ◽  
Giuseppina Andreotti ◽  
Antonio Trincone
Keyword(s):  
Vitamin E ◽  
Aplysia Fasciata
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