AfricanClarias catfish elicits long-lasting weak electric pulses

Барон, В. Д.; Орлов, А. А.; Голубцов, А. С.

doi:10.1007/bf01952864

Cited by 39 publications

(12 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ontogenetic information is still lacking for the siluriform genera Auchenoglanis and Clarias. In both genera the exact location and the embryological origin of electric organs still has yet to be discovered (Baron et al, 1994b(Baron et al, , 1996b. In Mormyriformes, electrocytes are associated with the caudal peduncule musculature in mormyrids, and are modified from tail muscles in Gymnarchus Cuvier (Dahlgren, 1914;Srivastava & Szabo, 1972).…”

Section: Phylogenetic Occurrence Of Electric Organs In Teleostsmentioning

confidence: 99%

The evolution of electroreception and bioelectrogenesis in teleost fish: a phylogenetic perspective

Alves-Gomes

2001

Journal of Fish Biology

View full text Add to dashboard Cite

According to current phylogenetic theory, both electroreceptors and electric organs evolved multiple times throughout the evolution of teleosts. Two basic types of electroreceptors have been described: ampullary and tuberous electroreceptors. Ampullary-type electroreceptors appeared once in the common ancestor of the Siluriformes+Gymnotiformes (within the superorder Ostariophysi), and on two other occasions within the superorder Osteoglossomorpha: in the African Mormyriformes and in the African Notopteriformes. Tuberous receptors are assumed to have evolved three times; all within groups that already possessed ampullary receptors. With the exception of a single catfish species, for which studies are still lacking, all fish with tuberous electroreceptors also have an electric organ. Tuberous electroreceptors are found in the two unrelated electrogenic teleost lineages (orders Gymnotiformes and Mormyriformes) and in one non-electrogenic South American catfish species (order Siluriformes). Electric organs evolved eight times independently among teleosts: five of them among the ostariophysans (once in the gymnotiform ancestor and in four siluriform lineages), once in the common ancestor of Mormyriformes, and in two uranoscopids. With the exception of two uranoscopid genera, for which no electroreceptive capabilities have been discovered so far, all electric organs evolved as an extension of a pre-existing electroreceptive (ampullary) condition. It is suggested that plesiomorphic electric organ discharges (EODs) possessed a frequency spectrum that fully transgressed the tuning curve of ampullary receptors, i.e. a signal such as a long lasting monophasic pulse. Complex EOD waveforms appeared as a derived condition among electric fish. EODs are under constant evolutionary pressure to develop an ideal compromise between a function that enhances electrolocation and electrocommunication capabilities, and thereby ensures species identity through sexual and behavioural segregation, and minimizes the risk of predation. 2001 The Fisheries Society of the British Isles

show abstract

Section: Phylogenetic Occurrence Of Electric Organs In Teleostsmentioning

confidence: 99%

The evolution of electroreception and bioelectrogenesis in teleost fish: a phylogenetic perspective

Alves-Gomes

2001

Journal of Fish Biology

View full text Add to dashboard Cite

show abstract

“…Clariids are weakly elec tric fish, capable of generating low amplitude unipolar pulses of great duration, sensed with many ampullary electroreceptors. The electric pulses are generated mainly during aggressive conflicts or mating (Baron et al, 1994;Olshanskiy et al, 2009;Kasumyan et al, 2013). The long barbels of clariids (four pairs) serve as important tactile and gustatory sense organs; their amputation has been shown to considerably decrease…”

Section: Introductionmentioning

confidence: 99%

Behavior and gustatory reception of air-breathing catfishes (Clariidae)

Kasumyan

2014

J. Ichthyol.

View full text Add to dashboard Cite

Taste preferences to classical taste substances and L isomers of free amino acids and feeding behavior are analyzed in clariids Clarias gariepinus, C. macrocephalus, and C. batrachus and the hybrid between C. macrocephalus (female) and C. gariepinus (male). It is found that citric acid (0.26 M) is palatable for all studied clariids, and the presence of this acid in agar-agar pellets considerably increases their con sumption by fish. The stimulating effect of citric acid on C. gariepinus and C. macrocephalus is greater than the effect of water extracts of organisms consumed by these species or of artificial foods. Sucrose (0.29 M) is palatable for both species. The palatability of sodium chloride (1.73 M) and calcium chloride (0.9 M) is the same for C. gariepinus and the hybrid but different for C. macrocephalus (p < 0.05), indicating the patroclinous type of taste preference inheritance. Of the 21 free amino acids (0.1-0.001 M), 17 are palatable for C. gariepinus (methionine, alanine, glutamine, cysteine, histidine, etc.) and four are indifferent (arginine, leucine, isoleu cine, and tryptophan). No amino acid is found to be deterrent for the studied fishes. All studied fishes typi cally consume or reject pellets after a single intraoral testing; repeated grasping of pellets is extremely rare. The total time clariids spend on intraoral testing and consumption or rejection of one pellet is at most 3-5 s. Clariids captured in their natural environments (C. macrocephalus and C. batrachus) require considerably more time for acclimation to aquarium conditions than clariids taken from the aquaculture (C. gariepinus and the hybrid): at least one month and several days, respectively. The stress response to handling in wild fish includes the release of large amounts of skin mucus.

show abstract

“…Клариевые сомы сопровождают различные формы активного поведения -агрессию [1][2][3], охоту [4], нерест [5,6] -генерацией монополярных электрических импульсов (МИ). МИ клариевых сомов по паттерну и длительности похожи на МИ ромботелых скатов и звездочётов [7].…”

unclassified

The mating ritual and patterns of monopolar electrical pulses in Hong Kong catfish Clarias fuscus (Clariidae, Siluriformes)

Olshanskiy¹

2019

Доклады Академии наук

View full text Add to dashboard Cite

Laboratory experiments were performed to compare the electrical activity and behavior in Clarias fuscus during spawning. Each of the multiple matings of the male and female was preceded by an amplexus - a mutual pose in which the male tightly covers the females head and remains in close contact with it until the end of mating. The spawning behavior of C. fuscus was accompanied by monopolar electrical pulses (MP) of two types: single MPs, similar to those observed in other behavioral situations (aggression, hunting) and specific MPs, observed only during spawning bursts of serial MPs (burst MPs), at intervals which are comparable with their duration. Each recorded burst MPs (71) corresponded to one mating, and each recorded single MP (63) corresponded to an attack of one fish on another. In different behavioral situations (matings and attacks), MPs differ significantly in amplitude and duration; and for MPs in bursts, in their degree of asymmetry. It can be assumed that the involvement of MPs in the spawning behavior of C. fuscus is similar to that studied earlier in Clarias macrocephalus, and is a common feature for Clariidae.

show abstract

AfricanClarias catfish elicits long-lasting weak electric pulses

Cited by 39 publications

References 9 publications

The evolution of electroreception and bioelectrogenesis in teleost fish: a phylogenetic perspective

The evolution of electroreception and bioelectrogenesis in teleost fish: a phylogenetic perspective

Behavior and gustatory reception of air-breathing catfishes (Clariidae)

The mating ritual and patterns of monopolar electrical pulses in Hong Kong catfish Clarias fuscus (Clariidae, Siluriformes)

Contact Info

Product

Resources

About