Natural hybridization between endangered and introduced species of <i>Pseudorasbora</i>, with their genetic relationships and characteristics inferred from allozyme analyses

Konishi, Mayu; Hosoya, Kazumi; Takata, Kazuyuki

doi:10.1046/j.1095-8649.2003.00146.x

Cited by 31 publications

(33 citation statements)

References 18 publications

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“…Pseudorasbora pumila (Japanese name, shinai-motsugo), an endangered species of freshwater minnow in Japan, has largely been replaced by the accidentally introduced species, Pseudorasbora parva (Japanese name, motsugo) as a result of intensive hybridization (Uchiyama, 1987;Konishi et al, 2003). The frequent natural hybridization between P. pumila and P. parva is direct evidence that the two species share mating behaviors and compete for reproductive resources.…”

Section: Methodsmentioning

confidence: 98%

Size-dependent male?male competition for a spawning substrate between Pseudorasbora parva and Pseudorasbora pumila

Konishi

Takata

2004

Ichthyological Research

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Pseudorasbora parva, a species native to western Japan, has been accidentally introduced into eastern Japan, where P. pumila is indigenous. We investigated inter-and intraspecific, male-male competition between P. parva and P. pumila for acquisition of spawning substrates in an experimental setting. Within each species, males of larger standard length and heavier body weight were more successful in acquiring a substrate. Males of the two species competed, but the outcome was determined primarily by body weight. This interspecific, size-dependent, male-male competition might be an important factor in the species replacement of P. pumila by P. parva.

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Section: Methodsmentioning

confidence: 98%

Size-dependent male?male competition for a spawning substrate between Pseudorasbora parva and Pseudorasbora pumila

Konishi

Takata

2004

Ichthyological Research

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“…Hosoya and Maehata (1994) inferred that one of the causes for displacement by P. parva might have been hybridization between the species, because of overlapping of breeding seasons of the two species (Nakamura, 1969) and the easy occurrence of both natural and artificial hybridization (Hosoya and Maehata, 1994;Kasama et al, 1990). Recently, Konishi et al (2003) found that in Nagano Prefecture (Honshu), the two species have hybridized easily under natural conditions, but cannot coexist in the long term, P. pumila pumila being displaced by P. parva.…”

mentioning

confidence: 99%

“…in Japan (Matsubara, 1982;Sato, 1982;Kawamura et al, 2001;Konishi et al, 2003). To make clear these biological phenomena, ecological and genetic studies are indispensable for the sympatric populations comprising closely related native and nonnative fish species.…”

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confidence: 99%

Genetic structures of allopatric and sympatric populations in Pseudorasbora pumila pumila and Pseudorasbora parva

Koga

Gotō

2005

Ichthyol Res

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Pseudorasbora pumila pumila was collected to investigate its genetic relationships from 11 localities in Hokkaido and eastern Honshu of Japan with Pseudorasbora parva from 6 localities in Hokkaido, eastern Honshu, and Polovynka River (a tributary of the Amur River in eastern Russia) in 1996-1998. In Hokkaido and Akita prefectures (Honshu), three P. pumila pumila populations were distributed with P. parva sympatrically. Samples of P. pumila pumila and P. parva were analyzed based on 27 allozyme loci. Genetic differentiation between P. pumila pumila and P. parva (D = 0.522-0.622, average 0.601) was almost equal to or greater than that between other congeneric fish species previously reported. In the three sympatric populations of two species, which had arisen from artificial transplantation of the latter into localities of the former, the individual frequency composition of genetic types (P. pumila pumila, P. parva, F 1 hybrid, and later filial generation hybrid) were significantly different from each other. Differing from the previous studies, F 1 hybrids were fertile and coexisting populations of the two species included the F 1 hybrid and the later filial generation hybrid. These results suggest that genetic population dynamics of sympatric populations of the two species would be influenced not only by hybridization but also by ecological and environmental factors. Alternatively, the existence of populations that possessed both the alleles specific to P. pumila pumila and those specific to P. parva may indicate that introgressive hybridization, instead of species displacement, has occurred between the two species under a certain condition.

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“…Allozyme polymorphisms have commonly been used for phylogenetic inferences in various fish species (Exadactylos and Thorpe, 2001;Cammarata et al, 2002;Konishi et al, 2003;Swartz et al, 2004;Turan et al, 2005). In the present study the pattern of phylogenetic relationships of two genera, including four species, M. barbatus, M. surmuletus, U. moluccensis, U. pori, and one subspecies, M. b. ponticus, living in the Mediterranean Sea, were investigated together with genetic and morphological characters.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic relationships of Mediterranean Mullidae species (Perciformes) inferred from genetic and morphologic data

Turan¹

2006

Sci. Mar.

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SUMMARY: Genetic and morphological divergence and phylogenetic relationships of four species Mullus barbatus, Mullus surmuletus, Upeneus moluccensis, Upeneus pori and one subspecies M.b. ponticus of Mullus were investigated using 12 enzymatic systems, corresponding to 17 putative loci. Eight loci (AAT-1*, AAT-2*, ADH*, GAPDH*, G6PDH*, IDHP*, PGI-2*, SOD*) were found to be polymorphic in at least one species, while the remaining nine (mAAT*, CK-1*, CK-2*, G3PDH*, MDH*, ME-1*, ME-2*, PGI-1*, PGM*) were monomorphic in all species. Several loci showed different electrophoretic patterns among species and thus can be used in species taxonomy as diagnostic markers. The PGM* and SOD* loci proved to be especially species-specific. Fisher's exact test revealed overall highly significant allele frequency differences between M. barbatus and M. b. ponticus (P<0.001). Pairwise comparisons of genetic distance were found to be 0.034 between M. barbatus and M. b. ponticus, and 0.341 between M. barbatus and M. surmuletus within the genus Mullus. Relatively higher genetic differentiation (D=0.628) was observed between U. moluccensis and U. pori. For intergeneric comparisons, the highest genetic distance (1.250) was detected between M. surmuletus and U. pori, and the lowest (D=1.056) was observed between M. surmuletus and U. moluccensis. Remarkably U. pori was genetically the most distinct species from the genus Mullus. A neighbour-joining analysis of genetic data separated the two genera: M. barbatus and M. b. ponticus clustered as the closest taxonomic assemblage, which was a sister group to M. surmuletus in the first branch, while U. moluccensis and U. pori clustered more divergently in the second branch. Morphological data using meristic characters was congruent with the genetic data and revealed similar patterns of relationships among four Mullidae species.Keywords: Mullidae, genetic, morphology, phylogeny. RESUMEN: RELACIONES FILOGENÉTICAS DE LAS ESPECIES DE MULLIDAE (PERCIFORMES) DEL MEDITERRÁNEO INFERIDAS A PAR-TIR DE DATOS GENÉTICOS Y MORFOLÓGICOS. -Se investigaron las divergencias genéticas y morfológicas y las relaciones filogenéticas de cuatro especies Mullus barbatus, Mullus surmuletus, Upeneus moluccensis, Upeneus pori y una subespecie M.b. ponticus, usando 12 sistemas enzymáticos, correspondientes a 17 loci putativos. Se encontró que 8 loci (AAT-1*, AAT-2*, ADH*, GAPDH*, G6PDH*, IDHP*, PGI-2*, SOD*) eran polimórficos, en al menos una especie, mientras que los 9 restantes (mAAT*, CK-1*, CK-2*, G3PDH*, MDH*, ME-1*, ME-2*, PGI-1*, PGM*) eran monomórficos en todas las especies. Varios loci mostraron diferentes patrones electroforéticos entre especies y por tanto pueden utilizarse como marcadores diagnóstico en taxonomía específica. Los loci PGM* y SOD* fueron especie-específicos. El "Fisher's exact test" reveló diferencias altamente significativas totales de la frecuencia de alelos entre M. barbatus and M. b. ponticus (P<0.001). La comparación de distancia genética por parejas fue de 0.034 entre M. barbatus y M. b. ponti...

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Natural hybridization between endangered and introduced species of Pseudorasbora, with their genetic relationships and characteristics inferred from allozyme analyses

Cited by 31 publications

References 18 publications

Size-dependent male?male competition for a spawning substrate between Pseudorasbora parva and Pseudorasbora pumila

Size-dependent male?male competition for a spawning substrate between Pseudorasbora parva and Pseudorasbora pumila

Genetic structures of allopatric and sympatric populations in Pseudorasbora pumila pumila and Pseudorasbora parva

Phylogenetic relationships of Mediterranean Mullidae species (Perciformes) inferred from genetic and morphologic data

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