scholarly journals The success in the short-distance communication for mating does not depend on chemical signals in the crustacean decapod Procambarus clarkii (Girard, 1852)

2019 ◽  
Vol 10 (2) ◽  
Author(s):  
Stefania Peddio ◽  
Giorgia Sollai ◽  
Cinzia Podda ◽  
Giacomo Frau ◽  
Francesco Palmas ◽  
...  
Keyword(s):  
Chemical Communication ◽  
Short Distance ◽  
Procambarus Clarkii ◽  
Mating Behaviour ◽  
Sex Recognition ◽  
Experimental Conditions ◽  
Sexual Interaction ◽  
Sensory Modalities ◽  
Distance Communication ◽  
Natural Way

Pheromone-driven sex recognition has been widely documented in crayfish and a great deal of evidence supports the involvement of pheromones in their mating behaviour. This study investigates whether sexual interaction and mating success in the red swamp crayfish Procambarus clarkii are dependent on short-distance chemical communication between sexes, mediated by urine-borne pheromones. We compared the mating behaviour of intact animals that could release urine to chemically communicate in a natural way with that of urine-blocked animal pairs, for which chemical communication was precluded. Our results show that urine-borne pheromones are not critical for the reproductive success of P. clarkii, at least over the short-range distance (<1 m) considered in this study, during which the animals were confined in a restricted tank, facing one each other, and thus able to promptly mate. Under these experimental conditions, a lack of urine release neither precluded the occurrence, nor affected the duration of the different phases of mating behaviour. We conclude that short-distance chemical communication in P. clarkii is not a prerequisite for mating, and suggest that it could be affected by alternative sensory modalities, likely vision and/or acoustic signalling.

A low power transceiver design for short distance communication

2014 ◽  
Author(s):  
Jie Wu ◽  
Zhao Han ◽  
Kaiyun Tian ◽  
Liuyang Sun ◽  
Qingyun Dong ◽  
...  
Keyword(s):  
Low Power ◽  
Short Distance ◽  
Transceiver Design ◽  
Distance Communication

Large Core Fibers for Short-Distance Communication in Radiation Fields

2007 ◽  
Author(s):  
Susan H. Law ◽  
Simon C. Fleming ◽  
David R. McKenzie ◽  
Natalka Suchowerska ◽  
Jamil Lambert ◽  
...  
Keyword(s):  
Short Distance ◽  
Large Core ◽  
Radiation Fields ◽  
Distance Communication

The cardioregulatory system of crayfish: neuroanatomy and physiology

1975 ◽  
Vol 62 (3) ◽  
pp. 519-530
Author(s):  
L. H. Field ◽  
J. L. Larimer
Keyword(s):  
Procambarus Clarkii ◽  
Physiological Activity ◽  
Temporal Correlation ◽  
Reciprocal Relationship ◽  
Gill Chamber ◽  
Sensory Modalities ◽  
Hair Sensilla ◽  
Anatomical Arrangement ◽  
Dorsal Nerve ◽  
Stimulation Of

1. The anatomical arrangement of the cardioregulatory nerves and their physiological activity during cardiac modulation were analysed in Procambarus clarkii. 2. The bilaterally arranged pairs of cardioinhibitors and cardioaccelerator axons, in nerves SN II and SN III respectively, were physiologically identified by correlating spikes in SN II and SN III with the same spikes in the dorsal nerve, which innervates the heart. 3. The cardioinhibitor neurone fired tonically in varied sporadic bursts. During periods of cardiac inhibition, however, this neurone discharged in a long chain of spikes at a characteristic frequency of 40–50Hz. 4. The cardioaccelerator neurone fired tonically at 2–3 Hz but on occasion its activity reached 12 Hz. 5. Three inhibitory cardiac reflexes were analysed. The sensory modalities for the reflexes included (a) stretch of the dorsal pericardial wall, (b) chemical stimulation of coxal hair sensilla with glucose and (c) tactile stimulation of hair sensilla in and below the gill chamber, on the antennae, the antennules and on the anterior cephalothorax. 6. The discharge of both cardioinhibitor neurones showed a weak temporal correlation suggesting a common presynaptic drive, while the pair of cardioaccelerators appeared to have a reciprocal relationship with the cardioinhibitors.

Optical cables for short-distance communication systems

1979 ◽  
Author(s):  
H. Aulich ◽  
K. H. Eisenrith ◽  
G. Kinshofer ◽  
J. Grabmaier ◽  
E. Mayr ◽  
...  
Keyword(s):  
Short Distance ◽  
Communication Systems ◽  
Distance Communication

Predicting multisensory enhancement in neuronal responses

2012 ◽  
Vol 25 (0) ◽  
pp. 3
Author(s):  
Benjamin A. Rowland
Keyword(s):  
Alternative Hypothesis ◽  
Initial Response ◽  
Neuronal Responses ◽  
Experimental Conditions ◽  
Sensory Modalities ◽  
Response Enhancement ◽  
Multisensory Enhancement ◽  
Response Profiles ◽  
The Individual ◽  
Statistical Noise

The most dramatic physiological example of multisensory integration is response enhancement, where the integration of concordant signals across multiple sensory modalities leads to a larger and more reliable response. In the model system of the superior colliculus, the largest enhancements (often greater than the predicted sum) are observed when the individual signals being combined are weak. This principle conforms to expectations based on signal detection theory, and also as expected, enhancement is not uniform throughout any response. Typically it is greatest near its onset, when the unisensory inputs are at their weakest (Initial Response Enhancement, see Rowland et al., 2007; Rowland and Stein, 2008). Despite the general accuracy of this heuristic, however, there is a substantial amount of variance in the degree of observed enhancement at all levels of responsiveness. This observation appears to violate standard Bayesian predictions that are based on overall response magnitude. Aside from statistical noise, a possible explanation is that individual neurons in the dataset are calibrated to different ‘computational modes’. An alternative hypothesis is that the amount of enhancement is influenced greatly by response properties other than magnitude, specifically, the temporal profile of the response. The present analysis advances the latter hypothesis. We present a mechanistic framework that explains these findings and extends the standard Bayesian approach to generate an accurate prediction for the multisensory response profile given known unisensory response profiles. These predictions offer a ‘null hypothesis’ that can be used to quantify the circumstances and timing of anomalies in the integrative processes in different experimental conditions; for example, when it is developing under different conditions, or when it is disrupted by experimental or surgical intervention at any stage of life.

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