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Marine Biology

, Volume 153, Issue 6, pp 1009–1014 | Cite as

Synchronized development of gonad and bioluminescent light organ in a highly sexually dimorphic leiognathid fish, Photoplagios rivulatus

  • K. Ikejima
  • M. WadaEmail author
  • K. Kita-Tsukamoto
  • T. Yamamoto
  • N. Azuma
Research Article

Abstract

In order to investigate the possible coupling between sexual maturation and the light organ system (LOS) development in leiognathid fish, we determined the seasonal changes in the gonad maturation and the light organ enlargement in Photoplagios rivulatus, one of the leiognathid species possessing highly sexually dimorphic LOS. The fish specimens collected from March 2001 to August 2002 were assessed for standard length (SL), body weight (BW), sex, gonad weight (GW) and the light organ weight (LW). Gonadosomatic index (GSI = 102GW/BW) and percent weight of the light organ to body weight (PLW = 102 LW/BW) were used to demonstrate the extent of development of gonad and the LOS, respectively. Mean GSIs in both male and female increased in June through August. The mean PLW in males showed a similar trend to that of the GSI, while PLW in females showed no clear seasonal trends. A significant positive correlation was found between the GSI and the PLW in males but not in females. The onset of sexual maturity in males (55 mm SL) coincided with that of the light organ enlargement. These results strongly support the functional coupling between reproduction and bioluminescence in this species of leiognathid. From an evolutionary perspective, sexual dimorphism in the LOS is likely to have evolved through sexual selection for reproductive success in leiognathid fishes.

Keywords

Standard Length Sexual Dimorphism Sexual Maturation Light Organ Gonad Maturation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgment

We would like to thank P. Herring for valuable comments on the earlier version of the manuscript. Comments by anonymous reviewer were very helpful. This study was supported in part by Grant in Aid for Creative Scientific Research (No. 12NP0201) from Ministry of Education, Culture, Sports, Science and Technology, Government of Japan.

References

  1. Azuma N, Furubayash C, Shichiri T, Wada M, Suzuki Y (2005) Bioluminescence and mating behavior in pony fish, Leiognathus nuchalis In: Tsuji A, Matsumoto M, Maeda M, Kricka LJ, Stanley PE (eds) Bioluminescence and chemiluminescence. World Scientific, Singapore, pp 3–6CrossRefGoogle Scholar
  2. Dunlap P, McFall-Ngai MJ (1987) Initiation and control of the bioluminescent symbiosis between Photobacterium leiognathi and leiognathid fish. In: Lee JJ, Fredrick FJ (eds) Endocytobiology III. New York Academy of Sciences, New York, pp 269–283Google Scholar
  3. Frosse R, Pauly D (eds) (2005) FishBase, Ver. 03/2005. Published online, http://www.fishbase.org
  4. Herring PJ (2000) Species abundance, sexual encounter and bioluminescent signaling in the deep sea. Philos Trans R Soc B 355:1273–1276CrossRefGoogle Scholar
  5. Haneda Y, Tsuji FI (1972) The luminous organs of two species of leiognathid fishes recently found in Ambon, Indonesia. Sci Rep Yokosuka City Mus 19:7–11Google Scholar
  6. Haneda Y, Tsuji FI (1976) Luminescent system of pony fishes. J Morph 150:539–552Google Scholar
  7. Ikejima K, Ishiguro NB, Wada M, Kita-Tsukamoto K, Nishida M (2004) Molecular phylogeny and possible scenario of ponyfish (Perciformes: Leiognathidae) evolution. Mol Phylogenet Evol 31:904–909PubMedCrossRefGoogle Scholar
  8. Jones G (1985) Revision of the Australian species of the fish family Leiognathidae. Aust J Mar Freshwater Res 36:559–613CrossRefGoogle Scholar
  9. Kalou-Riga C, Economidis PS (1996) Ovarian atretic rates and sexual maturity of European horse mackerel, Trachurus trachurus (L.), in the Saronikos Gulf (Greece). Fish Bull 94:66–76Google Scholar
  10. Lee CF, Liu KM, Su WC, Wu CC (2005) Reproductive biology of the common ponyfish Leiognathus equulus in the south-western waters off Taiwan. Fish Sci 71:551–562CrossRefGoogle Scholar
  11. McFall-Ngai MJ (1983) Adaptations for reflection of bioluminescent light in the gas bladder of Leiognathus equulus (Perciformes: Leiognathidae). J Exp Zool 227:23–33PubMedCrossRefGoogle Scholar
  12. McFall-Ngai MJ, Dunlap PV (1983) Three new modes of luminescence in the leiognathid fish Gazza minuta: discrete projected luminescence, ventral body flash, and buccal luminescence. Mar Biol 73:227–237CrossRefGoogle Scholar
  13. McFall-Ngai MJ, Dunlap PV (1984) External and internal sexual dimorphism in leiognathid fishes: morphological evidence for sex-specific bioluminescent signaling. J Morph 182:71–83PubMedCrossRefGoogle Scholar
  14. McFall-Ngai MJ, Morin IG (1991) Camouflage by disruptive illumination in leiognathids, a family of shallow-water bioluminescent fishes. J Exp Biol 156:119–137Google Scholar
  15. Sasaki A, Ikejima K, Aoki S, Azuma N, Kashimura N, Wada M (2003) Field evidence for bioluminescent signaling in the pony fish, Leiognathus elongatus. Environ Biol Fishes 66:307–311CrossRefGoogle Scholar
  16. Sparks JS, Dunlap PV (2004) A clade of non-sexually dimorphic ponyfishes (Teleostei:Perciformes:Leiognathidae): phylogeny, taxonomy, and description of a new species. Am Mus Novitiates 3459:1–21CrossRefGoogle Scholar
  17. Sparks JS, Dunlap PV, Smith WL (2005) Evolution and diversification of a sexually dimorphic luminescent system in ponyfishes (Teleosti:Leiognathidae), including diagnosis for two new genera. Cladistics 21:305–27CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • K. Ikejima
    • 1
    • 2
  • M. Wada
    • 3
    Email author
  • K. Kita-Tsukamoto
    • 3
  • T. Yamamoto
    • 4
  • N. Azuma
    • 5
  1. 1.School of Environment, Resources and DevelopmentAsian Institute of TechnologyKlong Luang PathumthaniThailand
  2. 2.Japan Society for the Promotion of Science, Bangkok OfficeTWY Office CenterBangkokThailand
  3. 3.Ocean Research InstituteThe University of Tokyo, Nakano-kuTokyoJapan
  4. 4.Kanagawa Prefectural Fisheries Research InstituteOdawaraJapan
  5. 5.Faculty of Agriculture and Life ScienceHirosaki UniversityBunkyo-choJapan

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