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Mating Behavior of Zenarchopterus gilli and Zenarchopterus buffonis and Function of the Modified Dorsal and Anal Fin Rays in Some Species of Zenarchopterus (Teleostei: Hemiramphidae)

Maurice Kottelat and Kelvin K. P. Lim
Copeia
Vol. 1999, No. 4 (Dec. 17, 1999), pp. 1097-1101
DOI: 10.2307/1447985
Stable URL: http://www.jstor.org/stable/1447985
Page Count: 5
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Mating Behavior of Zenarchopterus gilli and Zenarchopterus buffonis and Function of the Modified Dorsal and Anal Fin Rays in Some Species of Zenarchopterus (Teleostei: Hemiramphidae)
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Abstract

Anecdotal field observations are reported for the first time for the genus Zenarchopterus. In Z. buffonis, a species with only slightly modified male dorsal and anal fin rays, male and female swim in parallel, the male flicking the posterior body part against the female. In Z. gilli, a species with highly modified male dorsal and anal fin rays, the male swims alongside the female, folding the dorsal and anal fins in her direction, to cling to her. The function of the modified fins of male Zenarchopterus had not yet been explained, and we hypothesize that in some species with dramatic modifications, the dorsal and anal fin function as a clasping mechanism.

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