Niklas Dreyer
University of Copenhagen
Publications 4
#1Momoko Kobayashi (Akita Prefectural University)H-Index: 1
#2Yue Him Wong (Akita Prefectural University)H-Index: 2
Last.Keiju Okano (Akita Prefectural University)H-Index: 6
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3 CitationsSource
#1Niklas Dreyer (UCPH: University of Copenhagen)H-Index: 3
#2Jens T. Høeg (UCPH: University of Copenhagen)H-Index: 32
Last.Yoichi Yusa (Nara Women's University)H-Index: 4
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Mating behaviour between a dwarf male and its hermaphrodite partner was observed for the first time in cirripedes using the androdioecious barnacle Scalpellum scalpellum. Mating between hermaphrodites was also observed. The dwarf males are located on the rim of the mantle cavity of the hermaphrodite partner. When mating, the male extends the penis, which is four times longer than its body. The penis first assumes a straight stance where it is waved around in a searching mode. Upon touching the c...
4 CitationsSource
#1Niklas DreyerH-Index: 3
#2Jørgen OlesenH-Index: 23
Last.Jens T. HøegH-Index: 32
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3 CitationsSource
#1Jens T. Høeg (UCPH: University of Copenhagen)H-Index: 32
#2Yoichi Yusa (Nara Women's University)H-Index: 4
Last.Niklas Dreyer (UCPH: University of Copenhagen)H-Index: 3
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How androdioecy (coexistence of hermaphrodites and males) is maintained is still poorly understood. Therefore, sex determination was studied in the androdioecious barnacle Scalpellum scalpellum L. First, 247 cypris larvae from seven broods were investigated for sexual dimorphism in larval morphology and found to be all identical. Second, experiments with cyprids showed that males and hermaphrodites differ distinctly in morphology as soon as 4–5 days after settlement. Third, 14 252 cyprids were a...
10 CitationsSource