Fine structure and histochemistry of the freshly extruded and hardened spermatophore of the spiny lobster,Panulirus interruptus

1987 ◽  
Vol 192 (3) ◽  
pp. 237-246 ◽  
Author(s):  
Gary G. Martin ◽  
Chris Herzig ◽  
Glen Narimatsu
Keyword(s):  
Fine Structure ◽  
Spiny Lobster ◽  
Panulirus Interruptus

Serotonin Transduction Cascades Mediate Variable Changes in Pyloric Network Cycle Frequency in Response to the Same Modulatory Challenge

2008 ◽  
Vol 99 (6) ◽  
pp. 2844-2863 ◽  
Author(s):  
Nadja Spitzer ◽  
Gennady Cymbalyuk ◽  
Hongmei Zhang ◽  
Donald H. Edwards ◽  
Deborah J. Baro
Keyword(s):  
Steady State ◽  
Spiny Lobster ◽  
Cycle Frequency ◽  
Panulirus Interruptus ◽  
Response System ◽  
Pyloric Network ◽  
Bath Application ◽  
The Mean ◽  
Circuit Output ◽  
Sustained Increase

A fundamental question in systems biology addresses the issue of how flexibility is built into modulatory networks such that they can produce context-dependent responses. Here we examine flexibility in the serotonin (5-HT) response system that modulates the cycle frequency (cf) of a rhythmic motor output. We found that depending on the preparation, the same 5-min bath application of 5-HT to the pyloric network of the California spiny lobster, Panulirus interruptus, could produce a significant increase, decrease, or no change in steady-state cf relative to baseline. Interestingly, the mean circuit output was not significantly different among preparations prior to 5-HT application. We developed pharmacological tools to examine the preparation-to-preparation variability in the components of the 5-HT response system. We found that the 5-HT response system consisted of at least three separable components: a 5-HT2βPan-like component mediated a rapid decrease followed by a sustained increase in cf; a 5-HT1αPan-like component produced a small and usually gradual increase in cf; at least one other component associated with an unknown receptor mediated a sustained decrease in cf. The magnitude of the change in cf produced by each component was highly variable, so that when summed they could produce either a net increase, decrease, or no change in cf depending on the preparation. Overall, our research demonstrates that the balance of opposing components of the 5-HT response system determines the direction and magnitude of 5-HT–induced change in steady-state cf relative to baseline.

Patterns of shelter use and their effects on the relative survival of subadult California spiny lobster (Panulirus interruptus)

2016 ◽  
Vol 67 (8) ◽  
pp. 1153 ◽  
Author(s):  
Amalia M. Harrington ◽  
Kevin A. Hovel
Keyword(s):  
Predation Risk ◽  
Field Experiments ◽  
Spiny Lobster ◽  
Relative Survival ◽  
Panulirus Interruptus ◽  
Rocky Reefs ◽  
Comprehensive Examination ◽  
Spiny Lobsters ◽  
Shelter Selection ◽  
Natural Reefs

Spiny lobsters use refuge habitat and gregarious behaviour to reduce predation risk, particularly in their vulnerable juvenile and subadult stages. We characterised patterns of sheltering behaviour in the California spiny lobster (Panulirus interruptus (Randall)) on southern California rocky reefs and used manipulative experiments to examine how these behaviours affect the survival of subadult lobsters and shelter selection. Lobsters generally were gregarious and subadults were commonly found inhabiting shelters with adult lobsters. Tethering experiments with subadults indicated that communal denning increases the odds of survival only when adult lobsters are part of aggregations. This corresponded to results from a shelter choice experiment in the laboratory, where the presence of predators caused subadults to shelter more often with adult conspecifics rather than other subadults. Despite the gregarious nature of P. interruptus, solitary subadults were common at all sites. Although field experiments clearly indicated that solitary lobsters increased their odds of survival by inhabiting shelters scaled to body size, evidence that lobsters exhibit shelter scaling on natural reefs was mixed. Our results indicate that subadult P. interruptus exhibit similar behavioural strategies as other spiny lobsters to reduce predation risk, and they provide a more comprehensive examination of P. interruptus behaviour than previously available.

scholarly journals Dopamine-induced oscillations of the pyloric pacemaker neuron rely on release of calcium from intracellular stores

2011 ◽  
Vol 106 (3) ◽  
pp. 1288-1298 ◽  
Author(s):  
Lolahon R. Kadiri ◽  
Alex C. Kwan ◽  
Watt W. Webb ◽  
Ronald M. Harris-Warrick
Keyword(s):  
Spiny Lobster ◽  
Ionic Currents ◽  
Calcium Currents ◽  
Cycle Frequency ◽  
Panulirus Interruptus ◽  
Two Photon Microscopy ◽  
Two Photon ◽  
Pyloric Network ◽  
Nervous System Function ◽  
External Calcium

Endogenously bursting neurons play central roles in many aspects of nervous system function, ranging from motor control to perception. The properties and bursting patterns generated by these neurons are subject to neuromodulation, which can alter cycle frequency and amplitude by modifying the properties of the neuron's ionic currents. In the stomatogastric ganglion (STG) of the spiny lobster, Panulirus interruptus, the anterior burster (AB) neuron is a conditional oscillator in the presence of dopamine (DA) and other neuromodulators and serves as the pacemaker to drive rhythmic output from the pyloric network. We analyzed the mechanisms by which DA evokes bursting in the AB neuron. Previous work showed that DA-evoked bursting is critically dependent on external calcium (Harris-Warrick RM, Flamm RE. J Neurosci 7: 2113–2128, 1987). Using two-photon microscopy and calcium imaging, we show that DA evokes the release of calcium from intracellular stores well before the emergence of voltage oscillations. When this release from intracellular stores is blocked by antagonists of ryanodine or inositol trisphosphate (IP3) receptor channels, DA fails to evoke AB bursting. We further demonstrate that DA enhances the calcium-activated inward current, ICAN, despite the fact that it significantly reduces voltage-activated calcium currents. This suggests that DA-induced release of calcium from intracellular stores activates ICAN, which provides a depolarizing ramp current that underlies endogenous bursting in the AB neuron.

Bioenergetics of red spiny lobster Panulirus interruptus (Randall, 1840) juveniles fed with mollusc

Aquaculture ◽  
2011 ◽  
Vol 318 (1-2) ◽  
pp. 207-212 ◽  
Author(s):  
Eugenio Díaz-Iglesias ◽  
Ana Karina Robles-Murillo ◽  
René J. Buesa ◽  
Marysabel Báez-Hidalgo ◽  
Miriam López-Zenteno
Keyword(s):  
Spiny Lobster ◽  
Panulirus Interruptus

Disentangling defense: the function of spiny lobster sounds

Behaviour ◽  
2010 ◽  
Vol 147 (2) ◽  
pp. 235-258 ◽  
Author(s):  
◽  
◽  
Keyword(s):  
Sound Production ◽  
Animal Communication ◽  
Spiny Lobster ◽  
Defensive Behaviour ◽  
Panulirus Interruptus ◽  
Predator Model ◽  
Defensive Behaviours ◽  
Behavioural Function ◽  
Model Predator

AbstractThe function of anti-predator signalling is a complex, and often-overlooked, area of animal communication. The goal of this study was to examine the behavioural function of an antipredator acoustic signal in the ocean. We observed the acoustic and defensive behaviours of California spiny lobsters (Palinuridae: Panulirus interruptus) to a model predator, model conspecific and blank pole, both in the tank and in the field. We found that P. interruptus make a 'rasp' sound once physically contacted by an aggressor, rather than during the approach. The model predator and conspecific elicited no discernable changes in defensive behaviour, but the responses by the lobsters to aggressors in the tank versus field were distinct. Our results indicate that the spiny lobster's rasp is used as a startle or aposematic signal, which may be coupled with visual aposematism of their spines. Alternatively, the rasp may function as a vibratory escape mechanism or as an acoustic analogue to eye-spots. This study offers insights into the role of acoustic signalling in the marine environment and demonstrates a central role for sound production in spiny lobster ecology.

Characterization of Proteases in the Digestive System of Spiny Lobster (Panulirus interruptus)

2004 ◽  
Vol 6 (3) ◽  
pp. 262-269 ◽  
Author(s):  
Laura E. Celis-Guerrero ◽  
Fernando L. García-Carreño ◽  
M. Angeles Navarrete del Toro
Keyword(s):  
Digestive System ◽  
Spiny Lobster ◽  
Panulirus Interruptus
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