Detection of Dissolved Substances by the American Lobster (Homarus americanus) and Olfactory Attraction between Lobsters

1970 ◽  
Vol 27 (8) ◽  
pp. 1371-1378 ◽  
Author(s):  
D. W. McLeese
Keyword(s):  
Amino Acids ◽  
Sex Attractant ◽  
Homarus Americanus ◽  
Mature Female ◽  
American Lobster ◽  
High Concentration ◽  
Beta Alanine ◽  
Sex Attractant Pheromone ◽  
Low Concentrations ◽  
Attractant Pheromone

Of 17 amino acids and other organic compounds tested at high concentration, 13 elicited feeding and walking responses in lobsters significantly greater than those elicited by seawater controls, but only 7 of 29 were stimulatory at low concentrations (alanine, beta alanine, glutamic acid, proline, succinic and malic acids, and tyrosine). Fourteen of 15 mixtures of 2–9 amino acids were stimulatory. There may have been potentiation in mixtures with cysteine HCl, lysine, glycine HCl, and methionine and antagonism in some with alanine and arginine. Freshly prepared seawater extracts of cod, shrimp, and lobster muscle were more stimulatory than any of the compounds or mixtures.Male lobsters responded more frequently to water from a tank with a recently moulted mature female lobster than to water from a tank with a nonmoulted mature female or a moulted or a nonmoulted male. It is possible that moulted females release a sex attractant (pheromone).

scholarly journals Experimental evidence for concentration-dependence and intra-specific variation of movement behaviour in American lobster (Homarus americanus) larvae

2016 ◽  
Author(s):  
Eric J Pedersen ◽  
Ryan R.E. Stanley ◽  
Paul V.R. Snelgrove ◽  
Frederic Guichard
Keyword(s):  
Vertical Distribution ◽  
Substantial Reduction ◽  
Homarus Americanus ◽  
American Lobster ◽  
High Concentration ◽  
Larval Stages ◽  
Larval Behaviour ◽  
Low Concentrations ◽  
Environmental Responses ◽  
Newly Hatched Larvae

Predicting dispersal paths of marine larvae with long pelagic durations, such as American lobster (Homarus americanus), requires understanding the cues to which larvae respond, and how that response reflects changes in larval behaviour. If larvae respond to conspecific presence by varying their movement, this behaviour can bias laboratory estimates of environmental responses. We tested whether larvae actively decreased their local intraspecific density by measuring how the vertical distribution of larvae changed under high versus low concentrations of conspecifics. We observed weak increases in vertical dispersion at higher concentrations in both newly-hatched larvae and in post-larvae, but not in intermediate larval stages. Further, we found that larvae from different mothers consistently differed in vertical distribution, which may indicate maternal effects on dispersal behavior. We also tested for differences in horizontal swimming behaviour in high and low concentrations, by fitting a novel random walk model that allowed us to model both larval interactions and persistent turning behaviours. We showed substantial reduction in diffusive behaviour under high concentration conditions resulting from more frequent turns by each larva, but no evidence for consistent avoidance of conspecifics. Our study is the first to demonstrate concentration-dependent behaviours in lobster larvae.

scholarly journals Experimental evidence for concentration-dependence and intraspecific variation of movement behaviour in American lobster (Homarus americanus) larvae

2017 ◽  
Vol 95 (10) ◽  
pp. 759-770
Author(s):  
Eric J. Pedersen ◽  
Ryan R.E. Stanley ◽  
Paul V.R. Snelgrove ◽  
Frédéric Guichard
Keyword(s):  
Substantial Reduction ◽  
Homarus Americanus ◽  
American Lobster ◽  
High Concentration ◽  
Larval Stages ◽  
Larval Behaviour ◽  
Low Concentrations ◽  
Marine Larvae ◽  
Environmental Responses ◽  
Newly Hatched Larvae

Predicting dispersal paths of marine larvae with extended pelagic durations, such as American lobster (Homarus americanus H. Milne Edwards, 1837), requires understanding the cues to which larvae respond, and how that response reflects changes in larval behaviour. If larvae respond to conspecific presence by varying their movement, then this behaviour can bias laboratory estimates of environmental responses. We tested whether larvae actively decreased their local intraspecific density by measuring how the vertical distribution of larvae changed under high versus low concentrations of conspecifics. We observed weak increases in vertical dispersion at higher concentrations both in newly hatched larvae and in postlarvae, but not in intermediate larval stages. We also tested for differences in horizontal swimming behaviour in high and low concentrations, by fitting a novel random walk model that allowed us to model both larval interactions and persistent turning behaviours. We showed substantial reduction in diffusive behaviour under high concentration conditions resulting from more frequent turns by each larva, but no evidence for consistent avoidance of conspecifics. Our study is the first to demonstrate concentration-dependent behaviours in lobster larvae.

scholarly journals Experimental evidence for concentration-dependence and intra-specific variation of movement behaviour in American lobster (Homarus americanus) larvae

2016 ◽  
Author(s):  
Eric J Pedersen ◽  
Ryan R.E. Stanley ◽  
Paul V.R. Snelgrove ◽  
Frederic Guichard
Keyword(s):  
Vertical Distribution ◽  
Substantial Reduction ◽  
Homarus Americanus ◽  
American Lobster ◽  
High Concentration ◽  
Larval Stages ◽  
Larval Behaviour ◽  
Low Concentrations ◽  
Environmental Responses ◽  
Newly Hatched Larvae

Predicting dispersal paths of marine larvae with long pelagic durations, such as American lobster (Homarus americanus), requires understanding the cues to which larvae respond, and how that response reflects changes in larval behaviour. If larvae respond to conspecific presence by varying their movement, this behaviour can bias laboratory estimates of environmental responses. We tested whether larvae actively decreased their local intraspecific density by measuring how the vertical distribution of larvae changed under high versus low concentrations of conspecifics. We observed weak increases in vertical dispersion at higher concentrations in both newly-hatched larvae and in post-larvae, but not in intermediate larval stages. Further, we found that larvae from different mothers consistently differed in vertical distribution, which may indicate maternal effects on dispersal behavior. We also tested for differences in horizontal swimming behaviour in high and low concentrations, by fitting a novel random walk model that allowed us to model both larval interactions and persistent turning behaviours. We showed substantial reduction in diffusive behaviour under high concentration conditions resulting from more frequent turns by each larva, but no evidence for consistent avoidance of conspecifics. Our study is the first to demonstrate concentration-dependent behaviours in lobster larvae.

Identification of a Sex Attractant Pheromone for Male Winterform Pear Psylla, Cacopsylla pyricola

2009 ◽  
Vol 35 (12) ◽  
pp. 1437-1447 ◽  
Author(s):  
Christelle Guédot ◽  
Jocelyn G. Millar ◽  
David R. Horton ◽  
Peter J. Landolt
Keyword(s):  
Sex Attractant ◽  
Sex Attractant Pheromone ◽  
Pear Psylla ◽  
Attractant Pheromone

Gypsy Moth Control with the Sex Attractant Pheromone

Science ◽  
1972 ◽  
Vol 177 (4043) ◽  
pp. 19-27 ◽  
Author(s):  
M. Beroza ◽  
E. F. Knipling
Keyword(s):  
Gypsy Moth ◽  
Sex Attractant ◽  
Sex Attractant Pheromone ◽  
Attractant Pheromone

scholarly journals Titelbild: The Sex Attractant Pheromone of Male Brown Rats: Identification and Field Experiment (Angew. Chem. 20/2016)

2016 ◽  
Vol 128 (20) ◽  
pp. 5969-5969
Author(s):  
Stephen Takács ◽  
Regine Gries ◽  
Huimin Zhai ◽  
Gerhard Gries
Keyword(s):  
Field Experiment ◽  
Sex Attractant ◽  
Sex Attractant Pheromone ◽  
Attractant Pheromone
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