Lacunae rostralis: A new structure on the rostrum of sailfish Istiophorus platypterus
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Lacunae rostralis : A new structure on the rostrum of sailfish Istiophorus platypterus. / Häge, Jan; Hansen, Matthew J.; Pacher, Korbinian; Dhellemmes, Félicie; Domenici, Paolo; Steffensen, John F.; Breuker, Michael; Krause, Stefan; Hildebrandt, Thomas B.; Fritsch, Guido; Bach, Pascal; Sabarros, Philippe S.; Zaslansky, Paul; Mahlow, Kristin; Schauer, Maria; Müller, Johannes; Krause, Jens.
In: Journal of Fish Biology, Vol. 100, No. 5, 2022, p. 1205-1213.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Lacunae rostralis
T2 - A new structure on the rostrum of sailfish Istiophorus platypterus
AU - Häge, Jan
AU - Hansen, Matthew J.
AU - Pacher, Korbinian
AU - Dhellemmes, Félicie
AU - Domenici, Paolo
AU - Steffensen, John F.
AU - Breuker, Michael
AU - Krause, Stefan
AU - Hildebrandt, Thomas B.
AU - Fritsch, Guido
AU - Bach, Pascal
AU - Sabarros, Philippe S.
AU - Zaslansky, Paul
AU - Mahlow, Kristin
AU - Schauer, Maria
AU - Müller, Johannes
AU - Krause, Jens
N1 - Publisher Copyright: © 2022 The Authors. Journal of Fish Biology published by John Wiley & Sons Ltd on behalf of Fisheries Society of the British Isles.
PY - 2022
Y1 - 2022
N2 - 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.
AB - 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.
KW - billfishes
KW - lacunae rostralis
KW - prey-handling
KW - rostrum
KW - sailfish
U2 - 10.1111/jfb.15018
DO - 10.1111/jfb.15018
M3 - Journal article
C2 - 35194781
AN - SCOPUS:85125857581
VL - 100
SP - 1205
EP - 1213
JO - Journal of Fish Biology
JF - Journal of Fish Biology
SN - 0022-1112
IS - 5
ER -
ID: 304458426