• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study on social and ecological factors promoting cooperative polyandry in fish and on their reproductive tactics

Research Project

Project/Area Number 13640635
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 生態
Research InstitutionOsaka City University

Principal Investigator

KOHDA Masanori  Osaka City University, Department of Biology and Geosciences, Professor, 大学院・理学研究科, 教授 (70192052)

Co-Investigator(Kenkyū-buntansha) MUHEHARA Hiroyuki  Hokkaido University, Field Research Center, Associate Professor, 北方圏フィールド科学センター, 助教授 (80212249)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2003: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2002: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2001: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsCooperative breeding / Cooperative polyandry / Female control of paternity / Mating systems / Sperm competition / Cooperation and conflict of interest / Reproductive tactics / Cichlid fishes / 一妻多夫制 / 共同繁殖 / 雌の操作 / 利害の対立 / 繁殖戦略 / ランプロギーニ種 / タンガニイカ湖 / 父子判定 / ランプロロギニ族 / 雌雄の利害の対立 / 子の保護
Research Abstract

Male investment to testes, female control of paternity distribution between territorial males and helper males, and effect of fish body size in cooperatively breeding cichlid fish Julidochromis transcriptus were studied in laboratory conditions during 2001 and 2004.
In this cooperatively polyandrous fish, it was cleared that both two males in polyandry invested in testes size significantly much more than males in monogamous situation where sperm competition should not exist. Moreover, the polyandrous males have already increased the testes size after one month of the start of experiment, suggesting they can immediately change the degree of investment This is the first document that individual males can dynamically change testes investment according with the intensity of sperm competition.
Female control of paternity distribution was confirmed by using designated artificial nests In this case, results obtained from experimental fish of cooperative breeding (trio) were compared with those … More of paired fish. Female with territorial pair male and small helper males spawned egg masses in wider ranges than paired females. DNA analysis of eggs revealed that 1) eggs of polyandrous females were sired by both males, 2) eggs in inner side of nest were sired by small helper males and those in outside of the masses were sired by large pair males. This tendency suggests that potyandryous female spawned eggs in wider range to fertilize the egg by both males. The manipulation of egg depositing site by females may provide the chance of female control of paternity distribution between the two males. When small males sired more number of eggs, they tended to provide more paternal care. This implies that the female afford to obtain more paternal care through her control of paternity, as has been indicated in cooperative polyandrous bird, the dunnocks. This study will be the first that provide evidence of female control of paternity in fish.
Our field studies on the mating system of J.ornateus, the congeneric species to J.trascriptus revealed that the former has a variety of mating systems, monogomay, cooperative polyandry and haremic polygamy. It is suggested that the main ecological factor inducing the variation is wide size variation in both sexes. We tested the hypothesis, using J.trascriptus of 3 males and 3 females in the same experimental aquaria. When size of all fish were similar monogomay was predominant. When one male was much larger than others, polygyny was formed in all cases. When a female was dominantly larger, polyandry was made. These results should support the hypothesis.
Chalinochrormis brichardi has cooperative polyandrous mating system, in which female control of shared paternity has been suggested. For the control females should obtain wedge shaped nest where small beta males can seek refuge from dominant alpha males. Our preliminary experiment I on female choice of two nests of wedge-shape nest and wide nest which do not have such refuge indicated that the female choose wedge-shaped nests. The results implies that female control may be the case in C.brichard.
Cooperative breedings have been documented in birds and mammals. A number of model of reproductive skew have been proposed for understanding of the breeding systems. Recently, members of our research team have revealed that in fish cooperative breeding with unrelated helpers, 1) helpers (beta males) share the paternity, and 2) helper numbers are restricted, one in C.brichard. These are consistent with the prediction from reproductive skew models. However, mechanism of paternity share between two or more unrelated males has not been cleared in these models. Our experimental studies suggest the importance of female control of paternity, which should be paid much more attention. Less

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (33 results)

All 2004 Other

All Journal Article (12 results) Publications (21 results)

  • [Journal Article] Parental roles and the amount of care in a bi-parental substrate brooding cichlid : the effect of size difference within pairs2004

    • Author(s)
      Awata, S., Kohda, M.
    • Journal Title

      Behaviour 141

      Pages: 1135-1149

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Parental roles and the amount of care in a bi-parental substrate brooding cichlid : the effect of size differences within pairs.2004

    • Author(s)
      Awata, S., Kohda, M.
    • Journal Title

      Behavior 141

      Pages: 1135-1149

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Social system and reproduction of helps in a cooperative breeding cichlid fish (Julidochromis ornateus) in Lake Tanganyuka

    • Author(s)
      Awata, S., Munehara, H., Kohda M.
    • Journal Title

      Behavioural Ecology and Sociobiology (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] The effect of body size on mating system and parental roles in the biparental cichlid fishi(Julidochromis transcriptus) : a preliminary laboratory experiment

    • Author(s)
      Awata, S., Takeuchi, H., Kohda.M.
    • Journal Title

      Journal of Ethology (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Nest use by territorial males in a shell-brooding cichlid : the effect of reproductive parasitism.

    • Author(s)
      Ota K., Kohda M.
    • Journal Title

      Journal of Ethology (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Description of alternative male reproductive tactics in a shell-brooding cichlid, Telmatochromis vittatus, in Lake Tanganyuka.

    • Author(s)
      Ota K., Kohda M.
    • Journal Title

      Journal of Ethology (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Alternative male mating tactics of the substrate brooding cichlid telmatochromis temporalis in Lade Tanganyika.

    • Author(s)
      Katoh R., Kohda M.
    • Journal Title

      Zoological Science (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Nest use by territorial males in a shell-brooding cichlid : the effect of reproductive parasitism.

    • Author(s)
      Ota, K., Kohda, M.
    • Journal Title

      Journal of Ethology (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Description of alternative male reproductive tactics in a shell-brooding cichlid, Telmatochromis vittatus, in Lake Tanganyika.

    • Author(s)
      Ota, K., Kohda, M.
    • Journal Title

      Journal of Ethology (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Alternative male mating tactics of the substrate brooding cichlid Telmatochromis temporalis in Lake Tanganyika.

    • Author(s)
      Kato, R., Kohda, M.
    • Journal Title

      Zoological Science (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Social system and reproduction of helpers in a cooperatively breeding cichlid fish (Julidochromis ornatus) in Lake Tanganyika : field observations and parentage analyses.

    • Author(s)
      Awata, S., Munehara, H., Kohda, M.
    • Journal Title

      Behavioral Ecology Sociobiology (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] The effect of body size on mating system and parental roles in the biparental substrate brooding cichlid (Jukidochromis transcriptus): a preliminary laboratory experiments

    • Author(s)
      Awata S., Takeuchi H., Kohda M.
    • Journal Title

      Journal of Ethology (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Takahashi D, Kohda M: "Courtship in fast water currents by male goby communicates the paternal quality honestly"Behav.Ecd.Sociobiol.. in press. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Takahashi D, Kohda M et al.: "Why egg caring males of Isaza (Gymnogobius isaza, Gobiidae) refuse additional females : preliminary field observations"J.Ehology. in press. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Matsumoto K, Kohda M: "Male foraging avoidance in female feeding territories in a harem polygynous cichlid in Lake Tanganyika"Ecol.Freshwaler Fish. in press. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sunobe T, Munehara H: "Mating system and kin relationship between adults and young in the shell-brooding cichlid fish neolamprologus meeli in Lake Tanganyika"J.Ethol.. 21. 87-92 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Hayakawa Y, Munehara H: "Comparison of ovarian functions for keeping embryos by measurement of dissolved oxygen concentrations in ovaries of copulatory and non-copulatory oviparous fishes and viviparous fishes"J Exp Mar.Biol.Ecol. 295. 245-255 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Iwata Y.Munehara Y et al.: "Characterization of microsatellite markers in the squid, Loligo bleekeri (Cephalopoa : Loliginidae)"Molecular Ecol.Notes. 3. 392-393 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 宗原弘幸: "水産学シリーズ 水産生物の情発現と行動生態"恒星社厚生閣. 137 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Takahashi D., Kohda M.: "Courtship in fast water currents by a male stream goby communicate the paternal quality honestly"Behavioral Ecology and Sociobiology. (in press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Takahashi D., Kohda M.: "Female preferences for nest size in the stream goby Rhinogobius sp. DA"Zoological Science. 19. 1241-1244 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Matsumoto K., Kohda M.: "The effect of feeding habitats on dietary shifts during the growth in a benthophagous suction-feeding fish"Zoological Science. 19. 709-714 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Sunobe T.Munehara H.: "Mating system and kin relationship between adults and young in the shell-brooding cichlid fish Neolamprologus meeli in Lake Tanganyika"Journal of Ethology. 21(in press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Munehara H., Sideleva V., Goto A.: "Mixed-species brooding between two Baikal sculpins, Paracottus kneri and Cottus kessleri : Field evidence for intra-and inter-specific competition"Journal of Fish Biology. 60. 981-988 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Hayakawa Y., Akiyama R., Munehara H., Komaru A.: "Dimorphic sperm influence semen distribution in a non-copulatory sculpin Hemilepidotus gilberti"Environmental Biology and Fishes. 65. 311-317 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 幸田正典: "魚類の社会行動2"海游舎. 210 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Hayakawa, Y., Akiyama, R, Munehara H.: "Dimorphic sperm influeme semen distribution in a non-copulatory sculpin Hemilepidotus ailberti"Environmantal Biology of Fishes. (印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Munehara.H.他: "Primer sequences and cross-species amplification for parentage discrimination of Tanganyilca cichlid fishes"Bull.Fish.Sci.Hokkaido Univ.. 52・3. 131-133 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Kohda, M他: "Male reproductive success in a promiscuous armoured cat fish Corydoras aeneus C (Callichthyidae)"Environmental Biology of Fishes. (印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hayakawa Y, Munehara H: "Lnitiation of sperm motilily depending on a change in externally osmotic pressure in the non-copulatory marine cottid fish gymnocanthus herzensteini"Lchthyological Research. (印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Takahashi D, Kohda M: "Females of a stream goby choose mates that court in fast water currents"Behavior. 138巻. 937-946 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Salcai Y, Kohda M, Kawamura T: "Effect of changing harem on timing of sex change in female cleaner fish Labroides dimidiates"Animal Behavior. 62巻. 251-257 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 幸田正典(分担): "魚類の社会行動II"海游舎(印刷中). 220 (2002)

    • Related Report
      2001 Annual Research Report

URL: 

Published: 2001-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi