Effects of temperature and food availability on growth and reproduction in the neustonic pedunculate barnacle Lepas anserifera
- 363 Downloads
To elucidate the life history of neustonic animals, growth and reproductive patterns were investigated in the hermaphroditic pedunculate barnacle Lepas anserifera in field and laboratory experiments in Wakayama, western Japan from 2006 to 2008. The effects of temperature (19, 24 or 29°C) and food availability (once or twice a week) on growth and reproduction were also studied in the laboratory. The barnacles grew and matured rapidly, especially in the field: individuals on the average grew from 3 mm to more than 12 mm in capitulum length within 15 days and some were brooding. High temperature and high food availability resulted in greater growth. High temperature also resulted in earlier maturation of both testes and ovaries, whereas the effect of food availability was less clear. The rapid growth and maturation, together with earlier maturation at higher temperatures, may be an adaptation to ephemeral floating objects to which they attach.
KeywordsBrine Shrimp Kaempferi Early Maturation High Food Level Ripe Ovary
We thank K. Wada, H. Sato, the editor and reviewers for their valuable comments, Y. Yamamoto, K. Okita, S. Urano, Y. Kitano, M. Matsumura and S. Serizawa for technical advice and help. The authors declare that they have no conflict of interest.
- Anton JF (1949) Stalked barnacles on the shores of the British Isles. Scottish Natur 61:65–67Google Scholar
- Bieri R (1966) Feeding preferences and rates of the snail, Ianthina prolongata, the barnacle, Lepas anserifera, the nudibranchs, Glaucus atlanticus and Fiona pinnata, and the food web in the marine neuston. Publ Seto Mar Biol Lab 14:161–170Google Scholar
- Charnov EL (1987) Sexuality and hermaphroditism in barnacles: a natural selection approach. In: Southward AJ (ed) Barnacle biology. AA Balkema, Rotterdam, Netherlands, pp 89–103Google Scholar
- Crisp DJ (1983) Chelonobia patula (Ranzani), a pointer to the evolution of the complemental male. Mar Biol Lett 4:281–294Google Scholar
- Darwin C (1851) A monograph on the sub-class Cirripedia, I. The Lepadidae. Ray Society, LondonGoogle Scholar
- Hoek PPC (1907) The cirripedia of the Siboga Expedition A. Cirripedia Pedunculata. Siboga-Expeditie 31a:1–128Google Scholar
- Jones EC (1967) Lepas anserifera Linne (Cirripedia Lepadomorpha) feeding on fish and Physalia. Crustaceana 14:311–313Google Scholar
- National Astronomical Observatory of Japan (2007) Chronological scientific table, Tokyo, Japan (in Japanese)Google Scholar
- Skerman TM (1958) Rate of growth in two species of Lepas (Cirripedia). N Z J Sci 1:402–411Google Scholar
- Tsikhon-Lukanina EA, Reznichenko OG, Nikolaeva GG (2001) Ecology of invertebrates on the oceanic floating substrata in the northwest Pacific Ocean. Oceanology 41:550–555Google Scholar
- Yusa Y, Abe N (1996) Rapid growth of a stalked barnacle, Lepas anserifera Linnaeus settled on a miniature ship. The Nanki seibutu 38:1–3 (in Japanese)Google Scholar