Neural Mechanisms of Dominance Hierarchies in Crayfish

Drummond, Joanne; Issa, Fadi A.; Song, Cha-Kyong; Herberholz, Jens; Yeh, Shih-Rung; Edwards, Donald H.

doi:10.1007/978-3-662-04843-6_9

Cited by 8 publications

(5 citation statements)

References 24 publications

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“…Crayfish and their relatives among the decapod crustaceans are established laboratory animals, and they show complex morphology, development, and behavior, including elaborate social interactions (e.g. Vilpoux et al 2006;Alwes and Scholtz 2006;Sandeman and Sandeman 1991;Scholtz 1992;Drummond et al 2002;Gherardi 2002;Krasne and Edwards 2002;Abzhanov and Kaufman 2000;Lundberg Locus ID is the arbitrarily given name of the region where the microsatellite marker is situated; GenBank® accession number is the number of the locus given at the entry into the database; repeat motif is the DNA sequence of the microsatellite within the locus; observed genotype shows the allele association of the locus consisting of allele fragment lengths represented by number of base pairs (bp); the minus signs stand for the absence of PCR products in case of unsuitable markers.…”

Section: Discussionmentioning

confidence: 99%

The parthenogenetic Marmorkrebs (marbled crayfish) produces genetically uniform offspring

Martin

Kohlmann

Scholtz

2007

Naturwissenschaften

118

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Genetically identical animals are very much in demand as laboratory objects because they allow conclusions about environmental and epigenetic effects on development, structures, and behavior. Furthermore, questions about the relative fitness of various genotypes can be addressed. However, genetically identical animals are relatively rare, in particular, organisms that combine a high reproduction rate and a complex organization. Based on its exclusively parthenogenetic reproduction mode, it has been suggested that the Marmorkrebs (Crustacea, Decapoda, Astacida), a recently discovered crayfish, is an excellent candidate for research addressing the aforementioned questions. However, until now, a study using molecular markers that clearly proves the genetic uniformity of the offspring has been lacking. Here, with this first molecular study, we show that this crayfish indeed produces genetically uniform clones. We tested this with 19 related individuals of various generations of a Marmorkrebs population by means of six different microsatellite markers. We found that all examined specimens were identical in their allelic composition. Furthermore, half of the analyzed loci were heterozygous. These results and the absence of meioses in previous histological studies of the ovaries lead us to conclude the Marmorkrebs propagates apomictically. Thus, a genetically uniform organism with complex morphology, development, and behavior is now available for various laboratory studies.

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Section: Discussionmentioning

confidence: 99%

The parthenogenetic Marmorkrebs (marbled crayfish) produces genetically uniform offspring

Martin

Kohlmann

Scholtz

2007

Naturwissenschaften

118

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“…In this way, inter-individual dominance relationships and rank orders arise (Bovbjerg, 1953;Goessmann et al, 2000 (for Astacus astacus)). In addition to the fighting behaviour of the noble crayfish, neurobiological and endocrinological (Edwards & Kravitz, 1997;Drummond et al, 2002) as well as game theoretical investigations (Stocker & Huber, 2001) have been carried out. This is why fighting behaviour may offer the most promising point of departure for future comparisons concerning phylogenetic systematics.…”

Section: Resting In the Open -Ruhen Im Freienmentioning

confidence: 99%

Behavioural elements of the noble crayfish, Astacus astacus (Linnaeus, 1758)

Lundberg¹

2004

Crustac

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Based on contemporary literature and original observations under laboratory conditions, this paper attempts to compile a first comprehensive ethogram for the noble crayfish, Astacus astacus. Sixty-six behavioural elements are described, belonging to 12 functional cycles. Supplementary proposals are welcome. By comparing the ethograms of various species we may be able to obtain further indications to the phylogeny of the freshwater crayfish. ZUSAMMENFASSUNGAuf der Grundlage aktueller Literatur sowie eigener Beobachtungen unter Laborbedingungen wird hier versucht, ein erstes umfassendes Ethogramm für den Europäischen Edelkrebs, Astacus astacus, zusammenzustellen. Es werden 66 Verhaltenselemente aus 12 Funktionskreisen beschrieben. Ergänzungsvorschläge sind sehr willkommen. Durch den Vergleich der Ethogramme verschiedener Flußkrebsarten sollte es möglich sein, neue Hinweise auf die Phylogenie dieser Gruppe zu gewinnen.

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“…Bilateral pairs of serotonergic neurons in the abdomen and thorax of crayfish receive both excitatory and inhibitory inputs in response to a lateral touch of the rostral portion of the abdomen, but the mix of excitation and inhibition depends on the social status of the animal (Drummond et al, 2002). The ipsilateral 5-hydroxytryptamine (5-HT) neurons of Isolate and dominant crayfish were excited by a unilateral touch while the contralateral 5-HT neurons were inhibited.…”

Section: Discussionmentioning

confidence: 99%

The effects of social experience on the behavioral response to unexpected touch in crayfish

Song

Herberholz

Edwards

2006

Journal of Experimental Biology

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SUMMARY Crayfish fight and form a dominance hierarchy characterized by a pattern of repeated agonistic interactions between animals with a consistent outcome of winner and loser. Once a dominance hierarchy is established, dominant animals display an elevated posture with both claws held laterally and forward,whereas subordinate animals display a more prone posture with both claws extended forward and down. Dominant animals behave aggressively towards the subordinate opponent, often approaching and attacking, whereas subordinate animals behave submissively by tailflipping and retreating. To evaluate whether the differences in social behavior are accompanied by differences in responses to non-social stimuli, we exposed socially naïve and experienced crayfish (Procambarus clarkii) to an unexpected touch in different social conditions. Socially naïve animals turned to confront the source of a unilateral touch with raised claws and elevated posture. Dominant animals also turned to face the stimulus source with raised claws and elevated posture, both when tested alone and in the presence of a subordinate opponent. Subordinate animals displayed this orienting response only while separated from their dominant partners. When paired with their dominant partners, subordinates avoided the stimulus source by walking rapidly forwards or backwards. When the subordinate animals were later tested again, first while semi-separated from the dominant and later while fully separated, they displayed a mixed pattern of avoidance and orienting responses. These results indicate that the behavioral responses of subordinate crayfish to touch depend on their social status, their current social conditions and their recent social history.

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Neural Mechanisms of Dominance Hierarchies in Crayfish

Cited by 8 publications

References 24 publications

The parthenogenetic Marmorkrebs (marbled crayfish) produces genetically uniform offspring

The parthenogenetic Marmorkrebs (marbled crayfish) produces genetically uniform offspring

Behavioural elements of the noble crayfish, Astacus astacus (Linnaeus, 1758)

The effects of social experience on the behavioral response to unexpected touch in crayfish

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