Advertisement

Ichthyological Research

, Volume 60, Issue 1, pp 85–88 | Cite as

Ovarian structure and mode of egg production in the seaweed pipefish Syngnathus schlegeli (Syngnathidae)

  • Atsushi Sogabe
  • Hiromi Takata
  • Yasuhisa Kobayashi
Short Report

Abstract

This study investigated ovarian structure and mode of egg production in the seaweed pipefish, Syngnathus schlegeli. The ovary had a rolled sheet-like structure where developing follicles were arranged serially in sequence according to their development, with a single germinal ridge running along the edge of the sheet. Oocytes of various developmental stages were concomitantly present in the ovary, and the number of mature eggs increased continuously over time, indicating that egg production is asynchronous. This would be a physiological basis for multiple spawning within a short time span associated with polygamy in this fish.

Keywords

Oogenesis Spawning Syngnathus schlegeli Syngnathidae Mating system 

Notes

Acknowledgments

We are grateful to S. Iwasaki for technical support in field and laboratory work. We thank K. Hidaka, H. Issiki, Y. Kamimura, H. Kinoshita, T. Morita, Y. Nakata, E. Sawai, J. Shoji, and A. Tada for their help in collecting fish. We also thank S. Watanabe for technical advice for rearing fish, J. Shibata for advice on statistical analyses, and anonymous reviewers for helpful comments. This research was supported by the Japan Society for the Promotion of Science for Young Scientists to A.S.

Supplementary material

10228_2012_313_MOESM1_ESM.pdf (734 kb)
Supplementary material 1 (PDF 734 kb)

References

  1. Begovac PC, Wallace RA (1987) Ovary of the pipefish, Syngnathus scovelli. J Morphol 193:117–133CrossRefGoogle Scholar
  2. Begovac PC, Wallace RA (1988) Stages of oocyte development in the pipefish, Syngnathus scovelli. J Morphol 197:353–369CrossRefGoogle Scholar
  3. Berglund A, Rosenqvist G, Svensson I (1988) Multiple matings and paternal brood care in the pipefish Syngnathus typhle. OIKOS 51:184–188CrossRefGoogle Scholar
  4. Foster SJ, Vincent ACJ (2004) Life history and ecology of seahorses: implications for conservation and management. J Fish Biol 65:1–61CrossRefGoogle Scholar
  5. Haresign TW, Shumway SE (1981) Permeability of the marsupium of the pipefish Syngnathus fuscus to [14C]-alpha amino isobutyric acid. Comp Biochem Physiol 69A:603–604CrossRefGoogle Scholar
  6. Ishihara T, Tachihara K (2009) The maturity and breeding season of the bellybarred pipefish, Hippichthys spicifer, in Okinawa-jima Island rivers. Ichthyol Res 56:388–393CrossRefGoogle Scholar
  7. Jones AG, Rosenqvist G, Berglund A, Avise JC (1999) The genetic mating system of a sex-role-reversed pipefish (Syngnathus typhle): a molecular inquiry. Behav Ecol Sociobiol 46:357–365CrossRefGoogle Scholar
  8. Jones AG, Walker D, Avise JC (2001) Genetic evidence for extreme polyandry and extraordinary sex-role reversal in a pipefish. Proc R Soc Lond B 268:2531–2535CrossRefGoogle Scholar
  9. Kvarnemo C, Mobley KB, Partridge C, Jones AG, Ahnesjö I (2011) Evidence of paternal nutrient provisioning to embryos in broad-nosed pipefish Syngnathus typhle. J Fish Biol 78:1725–1737PubMedCrossRefGoogle Scholar
  10. Nakabo T (ed) (2002) Fishes of Japan with pictorial keys to the species, English edn. Tokai University Press, TokyoGoogle Scholar
  11. Quast WD, Howe NR (1980) The osmotic role of the brood pouch in the pipefish Syngnathus scovelli. Comp Biochem Physiol 67A:675–678CrossRefGoogle Scholar
  12. Selman K, Wallace RA, Player D (1991) Ovary of the seahorse, Hippocampus erectus. J Morphol 209:285–304CrossRefGoogle Scholar
  13. Sogabe A, Ahnesjö I (2011) The ovarian structure and mode of egg production in two polygamous pipefishes: a link to mating pattern. J Fish Biol 78:1833–1846PubMedCrossRefGoogle Scholar
  14. Sogabe A, Matsumoto K, Ohashi M, Watanabe A, Takata H, Murakami Y, Omori K, Yanagisawa Y (2008) A monogamous pipefish has the same type of ovary as observed in monogamous seahorses. Biol Lett 4:362–365PubMedCrossRefGoogle Scholar
  15. Sogabe A, Kawanishi R, Takata H, Kobayashi Y (2012a) Basic reproductive biology of the barbed pipefish Urocampus nanus (Syngnathidae) under laboratory conditions. Ichthyol Res 59:77–82CrossRefGoogle Scholar
  16. Sogabe A, Mohri K, Shoji J (2012b) Reproductive seasonality of the seaweed pipefish Syngnathus schlegeli (Syngnathidae) in the Seto Inland Sea, Japan. Ichthyol Res 59:223–229CrossRefGoogle Scholar
  17. Wallace RA, Selman K (1981) Cellular and dynamic aspects of oocyte growth in teleosts. Am Zool 21:325–343Google Scholar
  18. Watanabe S, Watanabe Y (2001) Brooding season, sex ratio, and brood pouch development in the seaweed pipefish, Syngnathus schlegeli, in Otsuchi Bay, Japan. Ichthyol Res 48:155–160CrossRefGoogle Scholar
  19. Watanabe S, Hara M, Watanabe Y (2000) Male internal fertilization and introsperm-like sperm of the seaweed pipefish (Syngnathus schlegeli). Zool Sci 17:59–767CrossRefGoogle Scholar
  20. Wilson AB, Vincent A, Ahnesjö I, Meyer A (2001) Male pregnancy in seahorses and pipefishes (family Syngnathidae): rapid diversification of paternal brood pouch morphology inferred from a molecular phylogeny. J Hered 92:159–166PubMedCrossRefGoogle Scholar

Copyright information

© The Ichthyological Society of Japan 2012

Authors and Affiliations

  • Atsushi Sogabe
    • 1
    • 4
  • Hiromi Takata
    • 2
  • Yasuhisa Kobayashi
    • 3
  1. 1.Graduate School of Biosphere ScienceHiroshima UniversityHigashi-HiroshimaJapan
  2. 2.Graduate School of Science and EngineeringEhime UniversityMatsuyamaJapan
  3. 3.Sesoko Station, Tropical Biosphere Research CenterUniversity of the RyukyusMotobuJapan
  4. 4.Research Center for Marine Biology, AsamushiTohoku UniversityAsamushiJapan

Personalised recommendations