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Age, growth, and maturity of the Indian flathead Platycephalus indicus in the waters around Okinawa-jima Island, Japan

  • Yuichi AkitaEmail author
  • Katsunori Tachihara
Full Paper

Abstract

Indian flathead Platycephalus indicus (Platycephalidae) is an important fishery resource in tropical and subtropical waters. However, there have been few studies of its life history which is important for resource management because of taxonomic confusion. Here, we determine the age, growth, maturity, and spawning season of P. indicus from 351 specimens [21.7–76.9 cm total length (TL) for females; 19.6–61.9 cm TL for males] collected between August 2006 and August 2009 around Okinawa-jima Island, in southern Japan. Almost all specimens were caught by artisanal fishery. Age was determined by sectioning otoliths: the oldest specimens were seven years in both sexes. Parameters for von Bertalanffy growth functions were L = 72.6, k = 0.48 and t0 = -0.36 for females, and L = 53.6, k = 0.68 and t0 = -0.38 for males. Mean body size of females was larger than males at a given age, indicating females grow larger than males. The spawning season was estimated to be between January and October. The smallest and youngest mature female was 36.1 cm TL and 1.0 year old, while the smallest and youngest male was 22.9 cm TL and 0.4 years old. Moreover, the smallest mature male individual was smaller than the smallest female. Furthermore, we did not observe hermaphroditic gonads. Therefore, we consider that discrepancy in body size between sexes results from the difference in growth rate rather than sex change.

Keywords

Age Growth Maturity Indian flathead Platycephalus indicus 

Notes

Acknowledgements

We thank Dr. A. Ebisawa (Okinawa Prefectural Fisheries Research and Extension Center) and Mr. I. Ohta for providing data for landings of P. indicus, and Dr. M. Uehara (Fisheries Division of Okinawa Prefectural Government) for providing critical comments on the manuscript. We also thank Mr. S. Touyama, Z. Touyama, S. Matayoshi, Mr. H. Yogi, and Mr. Y. Uchima (Fisherman of the Okinawa City Fish Corp.) for educating us about local fisheries and fish biology; Ms. C. Touyama and Ms. H. Shindate for collecting fresh specimens; Mr. T. Maehara, S. Nakasone, and M. Ishimine for helpful support in obtaining and processing specimens; and all the members of the Laboratory of Fisheries Biology and Coral Reef Studies in the Faculty of Science at the University of the Ryukyus for supporting our study. The present study complied with current Japanese laws.

References

  1. Aoyama T, Kitajima C, Mizue K (1963) Study of the sex reversal of inegochi, Cociella crocodila. Bull Seikai Region Fish Res Lab 29:11–33Google Scholar
  2. Barnes LM, Gray CA, Williamson JE (2011) Divergence of the growth characteristics and longevity of coexisting Platycephalidae (Pisces). Mar Freshwater Res 62:1308–1317CrossRefGoogle Scholar
  3. Bawazeer AS (1989) The stock and fishery biology of Indian flathead (Wahar) Platycephalus indicus (Linnaeus), Family Platycephalidae in Kuwait waters. Kuwait Bull Mar Sci 10:169–178Google Scholar
  4. Brown-Peterson NJ, Wyanski DM, Saborido-Rey F, Macewicz BJ, Lowerre-Barbieri SK (2011) A standard terminology for describing reproductive development of fishes. Mar Coast Fish 3:52–70CrossRefGoogle Scholar
  5. Campana SE (2001) Accuracy, precision and quality control in age determination, including a review of the use and abuse of age validation methods. J Fish Biol 59:197–242CrossRefGoogle Scholar
  6. Fujii T (1970) Hermaphroditism and sex reversal in the fishes of the Platycephalidae - I. Sex reversal of Onigocia macrolepis (Bleeker). Jpn J Ichthyol 17:14–21Google Scholar
  7. Fujii T (1971) Hermaphroditism and sex reversal in the fishes of the Platycephalidae - II. Kumococius detrusus and Inegocia japonica. Jpn J Ichthyol 18:109–117Google Scholar
  8. Fujii T (1974) Hermaphroditism and sex reversal in the fishes of the Platycephalidae - III. Variation in the mode of sex reversal and speciation. Jpn J Ichthyol 21:92–100Google Scholar
  9. Ghiselin MT (1969) The evolution of hermaphroditism among animals. Q Rev Biol 44:189–208CrossRefGoogle Scholar
  10. Gray CA (2002) Management implications of discarding in an estuarine multi-species gill net fishery. Fish Res 56:177–192CrossRefGoogle Scholar
  11. Gray CA, Gale VJ, Stringfellow SL, Raines LP (2002) Variations in sex, length and age compositions of commercial catches of Platycephalus fuscus (Pisces: Platycephalidae) in New South Wales, Australia. Mar Freshwater Res 53:1091–1100CrossRefGoogle Scholar
  12. Gray CA, Barnes LM (2015) Spawning, maturity, growth and movement of Platycephalus fuscus (Cuvier, 1829) (Platycephalidae): fishery management considerations. J Appl Ichthyol 31:442–450CrossRefGoogle Scholar
  13. Hamada T, Tokuda M (1997) Sexuality with growth of bartailed flathead Platycephalus sp.2 (forecast). Bull. Fukuoka Fish. Mar. Technol. Res. Center. 7:15–18Google Scholar
  14. Hyndes GA, Loneragan NR, Potter IC (1992) Influence of sectioning otoliths on marginal increment trends and age and growth estimates for the flathead Platycephalus speculator. Fish Bull 90:276–284Google Scholar
  15. Immamura (1996) Phylogeny of the Family Platycephalidae and Related Taxa (Pisces: Scorpaeniformes). Species Diversity 1:123–233CrossRefGoogle Scholar
  16. Jordan AR (2001) Reproductive biology, early life-history and settlement distribution of sand flathead (Platycephalus bassensis) in Tasmania. Mar Freshwater Res 52:589–601CrossRefGoogle Scholar
  17. Jordan DS, Richardson RE (1908) A review of the flatheads, gurnards, and other mail-cheeked fishes of the waters of Japan. Proc U S Natl Mus 33:629–670CrossRefGoogle Scholar
  18. Kimura DK (1980) Likelihood methods for the von Bertalanffy growth curve. Fish Bull 77:765–776Google Scholar
  19. Knapp LW (1999) Platycephalidae. In: Carpenter KE, Niem VH (eds) The living marine resources of the western Central Pacific. Volume 4. Bony fishes, part 2 (Mugilidae to Carangidae). FAO species identification guide for fishery purpose. FAO, Rome, pp 2409Google Scholar
  20. Kuwamura T, Nakashima Y (1998) New aspects of the sex change among reef fishes: recent studies in Japan. Environ Biol Fishes 52:125–135CrossRefGoogle Scholar
  21. Lyle JM, Stark KE, Tracey SR (2014) 2012-13 Survey of recreational fishing in Tasmania. The Institute for Marine and Antarctic Studies, University of Tasmania, HobartGoogle Scholar
  22. Masuda Y, Shinohara N, Ozawa T (1991) Catches and distribution of two flathead species of genus Platycephalus in the southern Yatsushiro Sea, Japan. Nippon Suisan Gakkaishi 57:1257–1262CrossRefGoogle Scholar
  23. Masuda Y, Haraguchi M, Ozawa T, Matsui S, Hayashi S (1997) Morphorogical and biochemical comparisons of two flathead species of the genus Platycephalus collected from the Western Suonada and Southern Yatsushiro Seas, Japan. Nippon Suisan Gakkaishi 63:345–352CrossRefGoogle Scholar
  24. Masuda Y, Ozawa T, Onoue O, Hamada T (2000) Age and growth of the flathead, Platycephalus indicus, from the coastal waters of west Kyushu, Japan. Fish Res 46:113–121CrossRefGoogle Scholar
  25. Mohammadikia D, Kamrani E, Taherizadeh M (2014) Age and growth of flathead, Platycephalus indicus from the Persian Gulf (Bandar Abbas, Iran). J Mar Biol Assoc U K 94:1063–1071CrossRefGoogle Scholar
  26. Morikawa A, Kawakami H, Takita T (2002) Age and growth of two Platycephalid species in Ariake sound, Southern Japan. Suisanzoshoku 50:271–277Google Scholar
  27. Nakabo T, Kai Y (2013) Platycephalidae. In: Nakabo T (ed) Fishes of Japan, with pictorial keys yo the species. 3rd edition. Tokai University, Tokyo, pp 1953–1955Google Scholar
  28. Nelson JS, Grande TC, Wilson MVH (2016) Fishes of the world (Fifth edition). John Wiley & SonsGoogle Scholar
  29. Ohta I, Akita Y, Uehara M, Ebisawa A (2017) Current status of the coastal fisheries stocks in the Okinawa Islands waters, based on the historical catch data from 1989 to 2015. Annual report of Okinawa prefectural fisheries research and extension center 77:35–60Google Scholar
  30. Oikawa K (1996) Spawning of Flat-head, Platycephalus indicus under rearing condition. Bull Chiba Pref Fish Exp Sta 54:29–34Google Scholar
  31. Osatomi K, Nozoe T, Tsunemoto K, Hara K, Ichinoki T, Takita T, Ishihara T (2001) PCR-RFLP analysis of two flathead species of genus Platycephalus from the Ariake sound, Japan. Nippon Suisan Gakkaishi 67:503–504CrossRefGoogle Scholar
  32. Parker GA (1992) The evolution of sexual size dimorphism in fish. J Fish Biol 41:1–20CrossRefGoogle Scholar
  33. Sadovy Y, Shapiro D (1987) Criteria for the diagnosis of hermaphroditism in fishes. Copeia 1987:136–156CrossRefGoogle Scholar
  34. Shimose T, Nanami A (2014) Age, growth, and reproductive biology of blacktail snapper, Lutjanus fulvus, around the Yaeyama Islands, Okinawa, Japan. Ichthyol Res 61:322–331CrossRefGoogle Scholar
  35. Shinomiya A, Yamada M, Sunobe T (2003) Mating system and protandrous sex change in the lizard flathead, Inegocia Japonica (Platycephalidae). Ichthyol Res 50:383–386CrossRefGoogle Scholar
  36. Sunobe T, Sakaida S, Kuwamura T (2016) Random mating and protandrous sex change of the platycephalid fish Thysanophrys celebica (Platycephalidae). J Ethol 34:5–21CrossRefGoogle Scholar
  37. Taniguchi N, Ochiai A, Miyazaki T (1972) Comparative studies of the Japanese Platycephalid fishes by electropherograms of muscle proteins, LDH and MDH. Jpn J Ichthyol 19:89–96Google Scholar
  38. Uehara M, Kashiwagi F, Imai H, Tachihara K (2011) Biological traits of naturally induced hybrid individuals of two gizzard shads, Nematalosa come and N. japonica, in coastal waters around Okinawa Island, Ryukyu Archipelago, southwestern Japan. Ichthyol Res 58:344–349CrossRefGoogle Scholar
  39. Uehara M, Tachihara K (2012) Reproductive biology of Japanese gizzard shad (Nematalosa japonica) in coastal waters around Okinawa Island, Ryukyu Archipelago, southwestern Japan. Ichthyol Res 59:314–322CrossRefGoogle Scholar
  40. Uehara M, Imai H, Iwamoto K, Ohta I, Ebisawa A, Yoshino T, Tachihara K (2015) Distribution patterns and habitat preferences of two Nematalosa species, including the influence of recent environmental changes and the occurrence of natural hybridization. Jpn J Ichthyol 62:13–28Google Scholar
  41. Warner RR (1988) Sex change and the size-advantage model. Trends Ecol Evol 3:133–136CrossRefGoogle Scholar

Copyright information

© The Ichthyological Society of Japan 2019

Authors and Affiliations

  1. 1.Okinawa Prefectural Fisheries Research and Extension CenterItomanJapan
  2. 2.Laboratory of Fisheries Biology and Coral Reef Studies, Faculty of ScienceUniversity of the RyukyusNakagamiJapan

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