Courtship behaviour of Neurergus (Caudata: Salamandridae)

2000 ◽  
Vol 21 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Sebastian Steinfartz ◽  
Max Sparreboom ◽  
Gunter Schultschik
Keyword(s):  
General Pattern ◽  
Courtship Behaviour ◽  
Behaviour Pattern ◽  
Back Side ◽  
Transfer Phase ◽  
Old World ◽  
Spermatophore Transfer ◽  
Display Behaviour ◽  
Temporal Organisation

AbstractThe courtship of all four species of the salamandrid genus Neurergus is described. The display behaviour is similar in all species, but there are differences in the temporal organisation of tail-fanning. The behaviour of these newt species resembles that of other Old World aquatic salamandrids in its general pattern, with tail-fanning the principal movement during the display phase. The spermatophore transfer phase includes a behaviour pattern during which the male turns back side-on to the female after spermatophore deposition and arrests her in a position where her cloaca is situated over the spot where the spermatophore was put down by the male. This movement is similar to the behaviour pattern described as ‘brake’ in all species of Triturus. In cladistic terms this shared behaviour pattern forms a synapomorphy for the genera Triturus and Neurergus.

Sexual behaviour of the Montandon's newt, Triturus montandoni (Boulenger) (Caudata: Salamandridae)

1985 ◽  
Vol 6 (1) ◽  
pp. 11-22 ◽  
Author(s):  
Anna Pecio ◽  
Jan Rafiński
Keyword(s):  
Sexual Behaviour ◽  
Phylogenetic Relationships ◽  
General Pattern ◽  
Transfer Phase ◽  
Static Display ◽  
Spermatophore Transfer ◽  
Three Phases

AbstractIn its general pattern the sexual behaviour of Triturus montandoni most resembles that of Triturus helveticus. The courtship consists of three phases: orientation, static display and retreat display, followed by a spermatophore transfer phase. During display the male performs three tail movements: the fan, the whip, and the wave. The relative frequencies of tail movements and the duration of fanning bouts are the main difference between T montandoni, T. helveticus, and T. vulgaris. The phylogenetic relationships between these three species are discussed.

A field study of reproductive interactions in Bosca's newt, Triturus boscai

1995 ◽  
Vol 16 (4) ◽  
pp. 357-374 ◽  
Author(s):  
Manuel Mouta Faria
Keyword(s):  
Field Study ◽  
Natural Population ◽  
Wild Population ◽  
Short Circuit ◽  
The Other ◽  
Courtship Behaviour ◽  
Laboratory Studies ◽  
Free Living ◽  
Spermatophore Transfer ◽  
Sexual Interference

AbstractObservations of a free-living population of Bosca's newt, Triturus boscai, show that courtship behaviour in nature is similar to the behaviour observed in earlier laboratory studies. Complementary evidence was obtained on the behaviour called flick, which is sometimes inserted at the end of the static display phase, and may be viewed as an equivalent behaviour to the retreat display of the other small-bodied newt species. Sexual interference in the natural population was mainly caused by males. Two characteristic male behaviour patterns were recognised, the waiting position and the push-tail. Females tend to withdraw from situations of interference. Courtship sequences solely consisting of orientation and spermatophore transfer phases, so-called short-circuit sequences, may be interpreted as a male strategy to avoid the very severe male-to-male interference that exists in a wild population.

scholarly journals Referential alarm calling behaviour in New World primates

2012 ◽  
Vol 58 (5) ◽  
pp. 680-697 ◽  
Author(s):  
Cristiane Cäsar ◽  
Klaus Zuberbühler
Keyword(s):  
New World ◽  
General Pattern ◽  
Referential Communication ◽  
New World Monkeys ◽  
Human Language ◽  
New World Primates ◽  
Ample Evidence ◽  
Old World ◽  
Call Type ◽  
Wide Range

Abstract There is relatively good evidence that non-human primates can communicate about objects and events in their environment in ways that allow recipients to draw inferences about the nature of the event experienced by the signaller. In some species, there is also evidence that the basic semantic units are not individual calls, but call sequences and the combinations generated by them. These two findings are relevant to theories pertaining to the origins of human language because of the resemblances of these phenomena with linguistic reference and syntactic organisation. Until recently, however, most research efforts on the primate origins of human language have involved Old World species with comparatively few systematic studies on New World monkeys, which has prevented insights into the deeper phylogenetic roots and evolutionary origins of language-relevant capacities. To address this, we review the older primate literature and very recent evidence for functionally referential communication and call combinations in New World primates. Within the existing literature there is ample evidence in both Callitrichids and Ce-bids for acoustically distinct call variants given to external disturbances that are accompanied by distinct behavioural responses. A general pattern is that one call type is typically produced in response to a wide range of general disturbances, often on the ground but also including inter-group encounters, while another call type is produced in response to a much narrower range of aerial threats. This pattern is already described for Old World monkeys and Prosimians, suggesting an early evolutionary origin. Second, recent work with black-fronted titi monkeys has produced evidence for different alarm call sequences consisting of acoustically distinct call types. These sequences appear to encode several aspects of the predation event simultaneously, notably predator type and location. Since meaningful call sequences have already been described in Old World primates, we suggest that basic combinatorial vocal communication has evolved in the primate lineage long before the advent of language. Moreover, it is possible that some of these communicative abilities have evolved even earlier, or independently, as there is comparable evidence in other taxonomic groups. We discuss these findings in an attempt to shed further light on the primate stock from which human language has arisen.

scholarly journals Multi-modal Analysis of Courtship Behaviour in the Old World Leishmaniasis Vector Phlebotomus argentipes

2014 ◽  
Vol 8 (12) ◽  
pp. e3316 ◽  
Author(s):  
Daniel P. Bray ◽  
Khatijah Yaman ◽  
Beryl A. Underhilll ◽  
Fraser Mitchell ◽  
Victoria Carter ◽  
...  
Keyword(s):  
Modal Analysis ◽  
Courtship Behaviour ◽  
Old World ◽  
Phlebotomus Argentipes

scholarly journals On the Sexual Behaviour of the Italian Newt, Triturus Italicus (Caudata: Salamandridae)

1987 ◽  
Vol 57 (1) ◽  
pp. 19-30 ◽  
Author(s):  
Cristina Giacoma ◽  
Max Sparreboom
Keyword(s):  
Sexual Behaviour ◽  
Transfer Phase ◽  
Extended Phase ◽  
Static Display ◽  
Tail Movement ◽  
Spermatophore Transfer

The sexual behaviour of the Italian Newt Triturus italicus is characterized by an extended phase of static display. Tail fanning is the predominant movement during this stage. Shortly before creeping, a flicking tail movement is inserted in the display. Occasionally the male retreats in front of the female before turning to the spermatophore transfer phase. This behaviour is comparable to the retreat display of the T. vulgaris-helveticus-montandoni group. The long phase of static display resembles the behaviour of another species, T. boscai. In T. italicus, behaviours like retreat and tail touch by the female appear to be less stereotyped than in the T. vulgaris-helveticus-montandoni group.

Sexual behaviour of Bosca's newt, Triturus boscai

1993 ◽  
Vol 14 (2) ◽  
pp. 169-185 ◽  
Author(s):  
Manuel Mouta Faria
Keyword(s):  
Sexual Behaviour ◽  
The Other ◽  
Transfer Phase ◽  
Extended Phase ◽  
Static Display ◽  
Transfer Success ◽  
Spermatophore Transfer ◽  
Sexual Encounters ◽  
Female Signalling ◽  
Fanning Behaviour

AbstractThe sexual behaviour of Bosca's newt, Triturus boscai is characterized by an extended phase of static display, during which tail fanning is the main display. This behaviour is similar to that of another species, T. italicus. During the static display phase males may also push the females' throat with the snout, and perform tail flicking movements. Unlike the other small-bodied Triturus species, T. boscai males receive very little or no indication on the part of the female signalling them to begin the spermatophore transfer phase, and do not perform retreat display. As in T. italicus, the tail-touch behaviour by the female of T. boscai appears to be less stereotyped than in the T vulgaris-helveticus-montandoni group. Spermatophore transfer success was highest at the beginning of the sexual encounters, the so-called early sequences. These sequences had little or no fanning behaviour before the spermatophore transfer. Luring behaviours are often performed, mainly during the spermatophore transfer phase.

scholarly journals The sexual behaviour of the pygmy newt, Triturus pygmaeus

2002 ◽  
Vol 23 (4) ◽  
pp. 393-405
Author(s):  
◽  
◽  
Keyword(s):  
Sexual Behaviour ◽  
Courtship Behaviour ◽  
Direct Response ◽  
Static Display ◽  
Male Sexual Behaviour ◽  
Tail Movement ◽  
Spermatophore Transfer ◽  
Sexual Encounters ◽  
Three Phases

AbstractThe courtship behaviour of pygmy newts, Triturus pygmaeus, consists of three phases: orientation, static display (often not clearly differentiated from each other) and spermatophore transfer. The repertoire of male sexual behaviour consists of nine different movements. Exhibition, an alert posture in which the male advances with small jumps around the female, is the most frequent behaviour. The predominant tail movement is slow fan, in which the tail is softly undulated from approximately 30° to 140°. In contrast to the tail lashes of the large Triturus species, the tail only occasionally beats against the male's flank and never touches the female. Bait mimic tail movements (described for T. boscai as flamenco) are used to attract the female's attention. The duration of sexual encounters was 2203 s on average, in which males displayed in about 81% of this time. Although the courtship of T. pygmaeus shows clear differences from that of its closest relative, T. marmoratus, it should nevertheless be grouped with the larger Triturus species: conspicuous tail movementes are used to attract the attention of the female, but no direct response is required of her to complete the courtship. En el cortejo de los tritones enanos, Triturus pygmaeus, se pueden distinguir tres fases diferentes: fase de orientación, fase de exhibición estática y fase de deposición del espermatóforo. Las dos primeras no se distinguen claramente, sino que frecuentemente se alternan entre sí. Los machos de esta especie realizan nueve pautas diferentes relacionadas con el comportamiento sexual. Entre ellas, destaca la que denominamos exhibición , en la que el macho, en una posición de alerta con todo su cuerpo muy estirado, realiza pequeños saltos alrededor de la hembra. Este comportamiento, que es el que se observa con mayor frecuencia, parece tener un papel importante como señal visual en el cortejo. Otra pauta importante por su frecuencia es la denominada abanico lento, en la que los machos ondulan lentamente su cola, a la vez que abren y cierran el ángulo (que oscila entre 30° y 140°) que ésta forma con su cuerpo. Otra pauta característica es el latigazo corto, un movimiento brusco de la cola similar al de otras especies de tritones, de las que se diferencia porque la cola sólo ocasionalmente alcanza a golpearse contra su propio cuerpo y nunca llega a tocar a la hembra. Se describe en esta especie una pauta de engaño, flamenco, en la que los movimientos de la cola imitan a los de supuestas presas con el fin de atraer rápidamente la atención de la hembra. Esta pauta había sido descrita anteriormente para T. boscai. La duración media de los cortejos fue de 2203 s, en los que el 81% de este tiempo los machos elaboran pautas de cortejo. Aunque el cortejo de T. pygmaeus muestra claras diferencias con la especie próxima, T. marmoratus, se considera que debe ser clasificado en el mismo grupo, entre los tritones de mayor tamaño, en las que el cortejo se caracteriza por el uso de comportamientos muy conspícuos para la atracción de la hembra, y en el que no se requiere un respuesta directa de la hembra para realizar la deposición del espermatóforo.

scholarly journals Male dwarf chameleons assess risk of courting large, aggressive females

2005 ◽  
Vol 1 (2) ◽  
pp. 231-234 ◽  
Author(s):  
Devi M Stuart-Fox ◽  
Martin J Whiting
Keyword(s):  
Relative Size ◽  
Courtship Behaviour ◽  
Female Size ◽  
Male Courtship ◽  
Female Resistance ◽  
Male Display ◽  
Forced Copulation ◽  
Display Behaviour ◽  
Courtship Displays ◽  
Male Dwarf

Conflict between the sexes has traditionally been studied in terms of costs of mating to females and female resistance. However, courting can also be costly to males, especially when females are larger and aggressively resist copulation attempts. We examined male display intensity towards females in the Cape dwarf chameleon, Bradypodion pumilum , in which females are larger than males and very aggressive. We assessed whether aggressive female rejection imposes potential costs on males and whether males vary their display behaviour with intensity of female rejection, female size or relative size differences. Males persisted in courtship after initial female rejection in 84% of trials, and were bitten in 28% of trials. Attempted mounts were positively associated with males being bitten. Males reduced courtship with increased intensity of female rejection. Male courtship behaviour also varied with female size: males were more likely to court and approach smaller females, consistent with the hypothesis that larger females can inflict more damage. These results suggest that, in addition to assessing female willingness to mate, male dwarf chameleons may use courtship displays to assess potential costs of persistence, including costs associated with aggressive female rejection, weighed against potential reproductive pay-offs associated with forced copulation.

HREM observation of dislocations near room temperature fractures in silicon

1988 ◽  
Vol 46 ◽  
pp. 892-893
Author(s):  
M. H. Rhee ◽  
W. A. Coghlan
Keyword(s):  
Cross Section ◽  
Room Temperature ◽  
Single Crystal Silicon ◽  
Dislocation Nucleation ◽  
Back Side ◽  
Ion Milling ◽  
Crystal Silicon ◽  
Flat Surfaces ◽  
Induced Fractures ◽  
Vicker’S Microhardness

Silicon is believed to be an almost perfectly brittle material with cleavage occurring on {111} planes. In such a material at room temperature cleavage is expected to occur prior to any dislocation nucleation. This behavior suggests that cleavage fracture may be used to produce usable flat surfaces. Attempts to show this have failed. Such fractures produced in semiconductor silicon tend to occur on planes of variable orientation resulting in surfaces with a poor surface finish. In order to learn more about the mechanisms involved in fracture of silicon we began a HREM study of hardness indent induced fractures in thin samples of oxidized silicon.Samples of single crystal silicon were oxidized in air for 100 hours at 1000°C. Two pieces of this material were glued together and 500 μm thick cross-section samples were cut from the combined piece. The cross-section samples were indented using a Vicker's microhardness tester to produce cracks. The cracks in the samples were preserved by thinning from the back side using a combination of mechanical grinding and ion milling.

Ultrastructure and analytical microprobe analysis of simian lung mite pigments

1986 ◽  
Vol 44 ◽  
pp. 324-325
Author(s):  
R. W. Cole ◽  
J. C. Kim
Keyword(s):  
Biomedical Research ◽  
Tissue Damage ◽  
Microprobe Analysis ◽  
Old World Monkeys ◽  
Old World ◽  
Experimental Animals ◽  
The Past ◽  
Lung Mite ◽  
Mite Infestations ◽  
Cardiopulmonary System

In recent years, non-human primates have become indispensable as experimental animals in many fields of biomedical research. Pharmaceutical and related industries alone use about 2000,000 primates a year. Respiratory mite infestations in lungs of old world monkeys are of particular concern because the resulting tissue damage can directly effect experimental results, especially in those studies involving the cardiopulmonary system. There has been increasing documentation of primate parasitology in the past twenty years.

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