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Mating behaviour in Cyzicus grubei (Simon, 1886) (Branchiopoda, Spinicaudata)

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[Information on mating behaviour is available for only very few species of Spinicaudata. Mating behaviour of Cyzicus grubei was investigated under controlled conditions using video recordings. Four types of general interactions between individuals were recognized. Males were very active, and often tried to grasp a female, whereas females usually made attempts to escape throughout the mating process. The male captured the female from the dorsal side, then moved to the ventral side and took up a position with its long axis perpendicular to that of the female, forming a sort of cross. The pair then started rotating around the long axis of the female, while the male pushed its postabdomen into the female's carapace. Mating behaviour lasted from 18 to 35 seconds. The results seem to indicate that not only visual and tactile cues may be important in confirming species identity and receptivity of the female, but that chemical signals may also be involved. Los estudios sobre el comportamiento reproductor en los Spinicaudata son muy escasos. En este trabajo se ha investigado el comportamiento reproductor de Cyzicus grubei en condiciones controladas utilizando grabaciones de video, habiéndose detectado cuatro tipos de interacciones. Los machos, más activos que las hembras, intentan capturarlas, mientras que éstas suelen evitar esta acción. Cuando lo consiguen las sujetan por la parte dorsal del caparazón, tras lo cual se desplazan lateralmente hasta quedar colocados perpendicularmente a la hembra. De este modo, la pareja inicia movimientos rotatorios mientras el macho intenta introducir la parte posterior de su abdomen en el espacio delimitado por las dos valvas de la hembra, proceso que dura entre 18 y 35 segundos. Los resultados parecen indicar que no solo están involucrados estímulos visuales y táctiles en el reconocimiento de las hembras, ya que también podrían intervenir estímulos químicos., Information on mating behaviour is available for only very few species of Spinicaudata. Mating behaviour of Cyzicus grubei was investigated under controlled conditions using video recordings. Four types of general interactions between individuals were recognized. Males were very active, and often tried to grasp a female, whereas females usually made attempts to escape throughout the mating process. The male captured the female from the dorsal side, then moved to the ventral side and took up a position with its long axis perpendicular to that of the female, forming a sort of cross. The pair then started rotating around the long axis of the female, while the male pushed its postabdomen into the female's carapace. Mating behaviour lasted from 18 to 35 seconds. The results seem to indicate that not only visual and tactile cues may be important in confirming species identity and receptivity of the female, but that chemical signals may also be involved. Los estudios sobre el comportamiento reproductor en los Spinicaudata son muy escasos. En este trabajo se ha investigado el comportamiento reproductor de Cyzicus grubei en condiciones controladas utilizando grabaciones de video, habiéndose detectado cuatro tipos de interacciones. Los machos, más activos que las hembras, intentan capturarlas, mientras que éstas suelen evitar esta acción. Cuando lo consiguen las sujetan por la parte dorsal del caparazón, tras lo cual se desplazan lateralmente hasta quedar colocados perpendicularmente a la hembra. De este modo, la pareja inicia movimientos rotatorios mientras el macho intenta introducir la parte posterior de su abdomen en el espacio delimitado por las dos valvas de la hembra, proceso que dura entre 18 y 35 segundos. Los resultados parecen indicar que no solo están involucrados estímulos visuales y táctiles en el reconocimiento de las hembras, ya que también podrían intervenir estímulos químicos.]

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/content/journals/10.1163/001121610x535690
2010-11-01
2015-07-06

Affiliations: 1: Área de Zoología, Facultad de Ciencias, Universidad de Extremadura, Avda. de Elvas s/n, E-06071 Badajoz, Spain

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