Allozyme variation in global populations of striped mullet, Mugil cephalus (Pisces: Mugilidae)

Rossi, Anna Rita; Capula, Massimo; Crosetti, Donatella; Sola, Luciana; Campton, Donald E.

doi:10.1007/s002270050312

Cited by 56 publications

(56 citation statements)

References 37 publications

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“…Additional analyses of species boundaries not cited by these authors include studies of Myliobatis (Levy & Conceição, 1989), Siganus (Lacson & Nelson, 1993), Naso (Dayton et al, 1994), Pleuronichthys (Watanabe et al, 1994), Osmerus (Taylor & Dodson, 1994), several damselfish genera (Lacson, 1994;Lacson & Clark, 1995;Lessios et al, 1995), Lutjanus (Lee & Cheng, 1996), Trematomus (Bernardi & Goswami, 1997), Cyclothone (Miya & Nishida, 1997), Mugil (Rossi et al, 1998), andChaetodon (McMillan et al, 1999).…”

Section: Fishmentioning

confidence: 99%

“…What is somewhat surprising, however, is the considerable inconsistency among authors in their assignment of species level status to such forms. For example, allopatric populations of damselfish species belonging to several genera and Mugil cephalus are in each case distinguished by several fixed allozyme differences (Lacson, 1994;Lacson & Clark, 1995;Lessios et al, 1995;Rossi et al, 1998), but only in one publication is species level distinction recommended (Lessios et al, 1995). At the opposite end of the spectrum, allopatric butterflyfishes that can only be distinguished genetically by diagnostic sequences in the rapidly evolving control region of mtDNA are nevertheless recognized as distinct at the species level (McMillan et al, 1999).…”

Section: Fishmentioning

confidence: 99%

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Molecular genetic analyses of species boundaries in the sea

2000

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The tools of molecular genetics have enormous potential for clarifying the nature and age of species boundaries in marine organisms. Below I summarize the genetic implications of various species concepts, and review the results of recent molecular genetic analyses of species boundaries in marine microbes, plants, invertebrates and vertebrates. Excessive lumping, rather than excessive splitting, characterizes the current systematic situation in many groups. Morphologically similar species are often quite distinct genetically, suggesting that conservative systematic traditions or morphological stasis may be involved. Some reproductively isolated taxa exhibit only small levels of genetic differentiation, however. In these cases, large population sizes, slow rates of molecular evolution, and relatively recent origins may contribute to the difficulty in finding fixed genetic markers associated with barriers to gene exchange. The extent to which hybridization blurs species boundaries of marine organisms remains a subject of real disagreement in some groups (e.g. corals). The ages of recently diverged species are largely unknown; many appear to be older than 3 million years, but snails and fishes provide several examples of more recent divergences. Increasingly sophisticated genetic analyses make it easier to distinguish allopatric taxa, but criteria for recognition at the species level are highly inconsistent across studies. Future molecular genetic analyses should help to resolve many of these issues, particularly if coupled with other biological and paleontological approaches.

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Section: Fishmentioning

confidence: 99%

Section: Fishmentioning

confidence: 99%

Molecular genetic analyses of species boundaries in the sea

2000

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“…Although, the N e m values of the present study were much smaller than the mean value for marine fishes (N e m = 22.76, ) and allow significant divergence of gene frequencies among samples, they were large enough (>1) to counteract the effect of genetic drift if one assumes an infinite island model (Kimura 1955). In addition, the values found are comparative to those estimated for other marine species in the Mediterranean Sea (e.g., Engraulis encrasicolus, N e m = 8.6, Bembo et al 1996; Mullus barbatus, N e m = 5.6, Mamuris et al 1998a; Mugil cephalus, N e m = 7.26, Rossi et al 1998; Merluccius merluccius, N e m = 8.3, Cimmaruta et al 2005).…”

Section: Discussionmentioning

confidence: 68%

Genetic structure of three marine fishes from the Gulf of Pagasitikos (Greece) based on allozymes, RAPD, and mtDNA RFLP markers

et al. 2009

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In the present work we used three molecular techniques (allozymes, RAPDs and mtDNA RFLPs) in order to study the genetic structure of three commercial marine species (Mullus surmuletus, Mullus barbatus, and Pagellus erythrinus). Each species was sampled from three locations within the Gulf of Pagasitikos, Greece and from two neighbouring locations outside the Gulf (Trikeri and Alonissos). Values of genetic heterozygosity and nucleotide diversity for all populations studied were similar or above the mean values observed in marine fishes. None of the three types of molecular markers used revealed diagnostic patterns, which could allow the allocation of individuals to one of the populations. The analyses revealed that the three populations within Pagasitikos were homogenous representing thus a panmictic stock. However, there were evidences of genetic population subdivision between localities from inside and outside of the Pagasitikos Gulf. The results provide essential information for the design of a sustainable management plan of the Gulf of Pagasitikos and its demersal fish resources.

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“…Rocha- Olivares et al (2000), based on mitochondrial control region data set, detected a deep genetic differentiation between Gulf of Mexico-North West Atlantic and Hawaiian populations. Rossi et al (1998), using allozymebased genetic distances, suggested that some transoceanic populations might be at stage of incipient speciation. Moreover, Crosetti et al (1994) based on restriction mitochondrial DNA analysis concluded that grey mullet appears to fall in the ''gray zone'' Table III between well-differentiated conspecific samples and closely related species.…”

Section: Discussionmentioning

confidence: 99%

Assessing species validity ofMugil platanusGünther, 1880 in relation toMugil cephalusLinnaeus, 1758 (Actinopterygii)

Castro

Heras

Cousseau

et al. 2008

Italian Journal of Zoology

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Conservative morphological characters make identification of mullet species difficult. As a consequence, cosmopolitan distribution of Mugil cephalus is currently under discussion. In order to clarify the controversy regarding the taxonomic status of the southern Atlantic American mullet M. platanus, in relation to Mugil cephalus, a comprehensive analysis is presented using sequences of the mitochondrial gene cytochrome b, landmark-based morphometry and meristic data. The interlandmark distances showed differentiation between individuals of M. platanus and M. cephalus analyzed. Variables, representing the height at different levels of the longitudinal axis of the body, exposed that M. platanus has more robust middle and caudal segments of the body, in a lateral view, with respect to M. cephalus. Transversal series scales have not been useful for the identification of species. Lateral series scales seem to be useful to differentiate species, but taking into account that range showed an overlapped gradual variation. Genetic distance obtained between species shows a typical intrageneric level comparison. Two clear phylogroups have been detected indicating a high degree of genetic isolation between both species. Recognition of M. platanus as valid allopatric species is suggested.

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Allozyme variation in global populations of striped mullet, Mugil cephalus (Pisces: Mugilidae)

Cited by 56 publications

References 37 publications

Molecular genetic analyses of species boundaries in the sea

Molecular genetic analyses of species boundaries in the sea

Genetic structure of three marine fishes from the Gulf of Pagasitikos (Greece) based on allozymes, RAPD, and mtDNA RFLP markers

Assessing species validity ofMugil platanusGünther, 1880 in relation toMugil cephalusLinnaeus, 1758 (Actinopterygii)

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