A review of hybridization in marine angelfishes (Perciformes: Pomacanthidae)

Pyle, Richard L.; Randall, John E.

doi:10.1007/bf00023809

Cited by 26 publications

(30 citation statements)

References 8 publications

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“…Centropyge fishes are known to be sex-changing fishes (Moyer & Nakazono, 1978;Moyer, 1990); therefore, it may be concluded that no sex chromosomes occurred in any of the species examined. A number of Centropyge species are known to interbreed, and some do so regularly (Pyle & Randall, 1994). However, this study did not show any karyotypes suggesting the occurrences of hybrids.…”

Section: Discussioncontrasting

confidence: 65%

Diversified chromosomal characteristics in Centropyge fishes (Pomacanthidae, Perciformes)

Takai

Izutsu

2007

Hydrobiologia

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We studied karyotypes and other chromosomal markers such as C-banded heterochromatin and Ag-stained nucleolus organizer regions (Ag-NORs), in seven Centropyge fishes (Pomacanthidae, Perciformes). These results revealed diversified chromosomal characteristics in Centropyge species. Three species had 2n = 48 chromosomes, whereas four species had 2n = 52 chromosomes. Fundamental numbers showed a large variation from 48 to 82, particularly in the species with 2n = 52 chromosomes. In all the species, Ag-NORs were located in a single chromosome pair and C-bands were mainly distributed in the centromeric regions of most chromosomes, as commonly seen in teleostean fishes. However, these chromosomal markers showed species-specific variations and provided us with useful information that could help us in understanding chromosomal evolution. On the basis of these chromosomal characteristics, we infer the process of chromosomal evolution, which according to us involves an increase in chromosome number from 2n = 48 to 2n = 52 through centric fission or other mechanisms, and in fundamental number through pericentric inversion. In particular, karyotypic evolution involving the increase in chromosome number is an unusual event in the evolution of higher teleostean groups.

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Section: Discussioncontrasting

confidence: 65%

Diversified chromosomal characteristics in Centropyge fishes (Pomacanthidae, Perciformes)

Takai

Izutsu

2007

Hydrobiologia

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“…Most hybrids in contact zones studied to date show at least some morphological intermediacy with both parent species, although this is not always apparent (Pyle and Randall 1994, McMillan et al 1999, van der Meer et al 2012, von der Heyden and Connell 2012. Hybrids have been recorded in fishes, echinoderms, molluscs, and corals of the region (Lessios and Pearse 1996, Yaakub et al 2006, Richards et al 2008, Hobbs et al 2009, Montanari et al 2012, Ladner and Palumbi 2012, van der Meer et al 2012, Zigler et al 2012).…”

Section: Species Identificationmentioning

confidence: 97%

The application of genetics to marine management and conservation: examples from the Indo-Pacific

Heyden¹,

Beger²,

Toonen³

et al. 2014

BMS

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ABSTRACT.-Molecular tools and analyses have played pivotal roles in uncovering the processes and patterns of biodiversity in the Indian and Pacific oceans. However, integrating genetic results into management and conservation objectives has been challenging, with few examples that show practical applicability. This review aims to address some of the perceived barriers to an enhanced approach that integrates molecular data into management and conservation goals, by reviewing papers relevant to both conservation and fisheries management in the Indo-Pacific region, particularly with respect to phylogeography, connectivity, and species identification, as well as stock delineation, restoration of depleted wild stocks, mislabeled marine resources and "molecular forensics." We also highlight case studies from each of these areas that illustrate how molecular analyses are relevant to conservation and management in the IndoPacific, spanning a variety of vertebrate and invertebrate species. We discuss the application of genetic data to the design and evaluation of the effectiveness of marine protected area networks, stock delineation, and restoration and the usage of exclusion tests and parentage analyses for fisheries management. We conclude that there is a distinct need for increasing public awareness and ownership of genetically unique lineages and, ultimately, the increased inclusion of genetic research into management policy and conservation. Finally, we make a case for the importance of clear and effective communication for promoting public awareness, public ownership, and for achieving conservation goals within the region.

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“…Animal reproduction often involves specific mate recognition signaling (Paterson 1985), and many fish appear to select mates on the basis of their color (Barlow and Rogers 1978;McElroy and Kornfield 1990;Warner and Schultz 1992). Among those marine fish with most potential to hybridize, the natural occurrence of hybrids is low (Domeier 1994;Pyle and Randall 1994) and this is usually attributed to premating isolation. This includes the intriguing case of the butter hamlets (genus Hypoplectrus), which may be a polychromatic species complex from the Caribbean.…”

Section: The Contact Zone On Hyde Reefmentioning

confidence: 99%

Genetic and Color Interactions at a Contact Zone of Acanthochromis polyacanthus: A Marine Fish Lacking Pelagic Larvae

Planes¹,

Doherty²

1997

Evolution

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- Acanthochromis polyacanthus is an unusual tropical marine damselfish that uniquely lacks pelagic larvae and has lost the capacity for broad-scale dispersal among coral reefs. Different color morphs exist in different regions of the Great Barrier Reef, and morphs from northern and southern regions are genetically distinct. In the Hydrographers Passage area, which is a large break through the reef matrix in the central Great Barrier Reef that may have acted as a bottleneck on the migration of these animals during sea level rise, three morphs recognized from other regions were found on neighboring reefs. The transition between them is abrupt with three loci (AAT-2*, GPI-1*, and PGM*) showing allelic frequency patterns close to fixation between opposite alleles within a few kilometers. On two reefs (Hyde, Bebe), a pair of morphs was found to coexist and exhibited a habitat partitioning pattern with each morph restricted to one side on the reef and steep transitions in between. Outside these transition zones, phenotypes and genotypes matched those on surrounding reefs without coexistence and were little changed from reefs several hundred kilometers away. An electrophoretic survey across one transition zone on Hyde Reef showed steep genetic gradients along one kilometer of reef slope. Significant linkage disequilibria in samples collected in Hyde Reef as a result of dispersal of parental combinations of alleles into the center or because parental combinations of alleles confer greater fitness, allowed us to estimate the dispersal rate (189 m/generation) and the selection pressure on the marker loci (0.411). Finally, we investigated models that could lead to such a steep transition in genotypic and phenotypic combinations. Both contact zones on each side of Hyde Reef were associated with geomorphological discontinuities in the reef structure. We suggest that assortative mating may be a proximal mechanism for maintaining isolated each color morph, which could be reinforced by selective predation against hybrids outside the zone of their formation (i.e., the frequency-dependent selection model of Mallet and Barton (1989). Acanthochromis is a midwater planktivore and, when in coexistence, the two morphs forage in different habitats amid multispecific flocks of other damselfishes of matching colors.

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A review of hybridization in marine angelfishes (Perciformes: Pomacanthidae)

Cited by 26 publications

References 8 publications

Diversified chromosomal characteristics in Centropyge fishes (Pomacanthidae, Perciformes)

Diversified chromosomal characteristics in Centropyge fishes (Pomacanthidae, Perciformes)

The application of genetics to marine management and conservation: examples from the Indo-Pacific

Genetic and Color Interactions at a Contact Zone of Acanthochromis polyacanthus: A Marine Fish Lacking Pelagic Larvae

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