Genetic differentiation among eight color types of the freshwater goby,Rhinogobius brunneus, from western Japan

Masuda, Yasuji; Ozawa, Takakazu; Enami, Sumio

doi:10.1007/bf02905670

Cited by 30 publications

(19 citation statements)

References 19 publications

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“…Based on their electrophoretic data, four of the eight morphs were discrete species and the other four morphs belonged to a fifth species. We also used two (SC and SD) of the four morphs studied by Masuda et al (1989) and obtained the same conclusion that they are different species. An additional two morphs (SM and LB) which are endemic to the Ryukyus are also recognized as discrete species in our study.…”

Section: Discussionmentioning

confidence: 89%

“…Second, although spatial distributions of these morphs overlap considerably, there is some difference in micro-habitat preference (Mizuno, Uehara & Maki, 1979). More recently, Masuda, Ozawa & Enami (1989) showed that some of the colour morphs are genetically differentiated from each other on the basis of allozyme data. In the Ryukyu Islands, there is not only colour variation but also egg-size and life-history variation in the R. brunneus complex (Nishijima, 1968;Nakayama, 1975;Ohshiro, 1981;Iwata, 1981).…”

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confidence: 99%

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Biochemical and egg size evolution of freshwater fishes in the Rhinogobius brunneus complex (Pisces, Gobiidae) in Okinawa, Japan

Katoh¹,

Nishida²

1994

Biological Journal of the Linnean Society

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Many colour morphs have been recognized in the Rhinogobius brunneus complex. A recent electrophoretic study has revealed that some of the colour morphs are well differentiated from each other genetically. In Okinawa, egg-size and life-history variation has been found in addition to the colour variation in this species complex. T o clarify the nature of this life-history variation, gobies of a fluviatile morph with large eggs as well as three other amphidromous morphs with small eggs, inhabiting a single stream sympatrically in Okinawa, were analysed by electrophoresis and the females were also used for comparison of egg and clutch sizes. Electrophoretic data for 34 loci showed that each morph was separated by a fixed-allele difference for at least one locus, indicating that the four morphs which occurred sympatrically are reproductively isolated from each other. However, Nei's genetic distance between the fluviatile morph and one of the amphidromous morphs was much smaller (0.026) than distances among amphidromous gobies (0.323-0.480). Egg size of the former was by far the largest among the four. These results imply that speciation of the fluviatile morph accompanied by the egg-size increase has been completed rapidly without considerable genetic differentiation.

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Section: Discussionmentioning

confidence: 89%

mentioning

confidence: 99%

Biochemical and egg size evolution of freshwater fishes in the Rhinogobius brunneus complex (Pisces, Gobiidae) in Okinawa, Japan

Katoh¹,

Nishida²

1994

Biological Journal of the Linnean Society

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“…R . brunneus has many types which are sometimes sympatric but genetically independent (Masuda et al, 1989). Sampled specimens of R .…”

Section: Fishmentioning

confidence: 99%

Diel changes of larval drift among amphidromous gobies in Japan, especially Rhinogobius brunneus

Iguchi

Mizuno

1990

Journal of Fish Biology

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Larvae of amphidromous gobies migrate to the sea as passive drift. In order to identify the die1 drift pattern (DDP) of each species, we conducted 24 hour collections in different sections ofthree rivers. The DDPs ofdifferent species at each sampling station were almost identical, but the DDP of each species varied among stations, depending on the topographical features of water-courses. Downstream migration occurred throughout the day in steep water-courses while it was nocturnal with a peak in number soon after sunset in gentle gradients in the plain and was also nocturnal with a small amount ofdaytimedrifting between the two gradients. It is suggested that the larvae drifting from the upper parts of the river in daytime halted their migration in a pool with low flow rate until twilight.

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“…OR (Orange type) exhibits some of the greatest colour variation. However, the genetic distances, as determined by allozyme analysis, among the colour variants are relatively close (Masuda et al . 1989).…”

Section: Characteristics Of 13 Polymorphic Microsatellite Loci For 10mentioning

confidence: 99%

Isolation of microsatellite loci in the freshwater goby, Rhinogobius sp. (Gobiidae)

Ohara

Takahashi

Takagi

2004

Molecular Ecology Notes

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The Rhinogobius species complex (Pisces: Gobiidae) includes great variation in colour, morphology and ecological form. In particular, R. sp. OR (Orange type) exhibits some of the greatest colour variation among the species complex, although the genetic relationships among the variations in this fish remain unclear. Thirteen microsatellite loci were identified from R. sp. OR, and all loci were polymorphic with two to 17 alleles per locus. Observed heterozygosity ranged from 0.1 to 0.9, while the expected heterozygosity ranged from 0.19 to 0.96. Multiplex polymerase chain reaction reaction (PCR) were optimized. All loci except Rhi‐5 conform to Hardy–Weinberg equilibrium (P > 0.05).

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Genetic differentiation among eight color types of the freshwater goby,Rhinogobius brunneus, from western Japan

Cited by 30 publications

References 19 publications

Biochemical and egg size evolution of freshwater fishes in the Rhinogobius brunneus complex (Pisces, Gobiidae) in Okinawa, Japan

Biochemical and egg size evolution of freshwater fishes in the Rhinogobius brunneus complex (Pisces, Gobiidae) in Okinawa, Japan

Diel changes of larval drift among amphidromous gobies in Japan, especially Rhinogobius brunneus

Isolation of microsatellite loci in the freshwater goby, Rhinogobius sp. (Gobiidae)

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