Lacunae rostralis : a new structure on the rostrum of sailfish Istiophorus platypterus

Hage, J.; Hansen, M. J.; Pacher, K.; Dhellemmes, F.; Domenici, P.; Steffensen, J. F.; Breuker, M.; Krause, S.; Hildebrandt, T. B.; Fritsch, G.; /Bach, Pascal; /Sabarros, Philippe; Zaslansky, P.; Mahlow, K.; Schauer, M.; Muller, J.; Krause, J.

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dc.creator	Hage, J.
dc.creator	Hansen, M. J.
dc.creator	Pacher, K.
dc.creator	Dhellemmes, F.
dc.creator	Domenici, P.
dc.creator	Steffensen, J. F.
dc.creator	Breuker, M.
dc.creator	Krause, S.
dc.creator	Hildebrandt, T. B.
dc.creator	Fritsch, G.
dc.creator	/Bach, Pascal
dc.creator	/Sabarros, Philippe
dc.creator	Zaslansky, P.
dc.creator	Mahlow, K.
dc.creator	Schauer, M.
dc.creator	Muller, J.
dc.creator	Krause, J.
dc.date	2022
dc.date.accessioned	2022-04-27T17:37:51Z
dc.date.available	2022-04-27T17:37:51Z
dc.identifier	https://www.documentation.ird.fr/hor/fdi:010084399
dc.identifier	oai:ird.fr:fdi:010084399
dc.identifier	Hage J., Hansen M. J., Pacher K., Dhellemmes F., Domenici P., Steffensen J. F., Breuker M., Krause S., Hildebrandt T. B., Fritsch G., Bach Pascal, Sabarros Philippe, Zaslansky P., Mahlow K., Schauer M., Muller J., Krause J.. Lacunae rostralis : a new structure on the rostrum of sailfish Istiophorus platypterus. 2022, [Early access], p. [9 p.]
dc.identifier.uri	http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/169127
dc.description	Recent comparative studies of billfishes (Istiophoridae and Xiphiidae) have provided evidence of differences in the form and function of the rostra (bill) among species. Here, we report the discovery of a new structure, lacuna rostralis, on the rostra of sailfish Istiophorus platypterus, which is absent on the rostra of swordfish Xiphias gladius, striped marlin Kajikia audax and blue marlin Makaira nigricans. The lacunae rostralis are small cavities that contain teeth. They were found on the ventral rostrum surface of all I. platypterus specimens examined and dorsally in half of them. Ventrally, the lacunae rostralis were most prominent in the mid-section of the rostrum. Dorsally, they occurred closer to the tip. The density of lacunae rostralis increased towards the rostrum tip but, because they are smaller in size, the percentage of rostrum coverage decreased. The teeth located within the lacunae rostralis were found to be different in size, location and orientation from the previously identified micro-teeth of billfish. We propose two potential functions of the lacunae rostralis that both relate to the use of the bill in feeding: mechanoreception of prey before tapping it with the bill and more efficient prey handling via the creation of suction, or physical grip.
dc.language	EN
dc.subject	billfishes
dc.subject	lacunae rostralis
dc.subject	prey-handling
dc.subject	rostrum
dc.subject	sailfish
dc.title	Lacunae rostralis : a new structure on the rostrum of sailfish Istiophorus platypterus
dc.type	text
dc.coverage	ITALIE
dc.coverage	MEXIQUE
dc.coverage	RÉUNION