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  • 1
    Electronic Resource
    Electronic Resource
    Genetic and demographic variation in new recruits of Naso unicornis (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 61 (2002), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Demographic data showed that larvae of Naso unicornis colonizing the reefs of Moorea, French Polynesia, on the same night within a restricted area originated from several spawning events that occurred 67 to 94 days previously. Based on the demographic structure of larvae of N. unicornis colonizing the reef, it cannot be entirely dismissed that siblings colonize together because five spawning dates grouped c. 55% of the captured larvae. Relatedness analysis reinforced these observations and also confirmed that larvae colonizing together were not all siblings. Larvae of the same spawning dates, however, appeared related in some age-classes (72, 74 and 77 days old), suggesting that siblings recruited together. In addition, the larvae appeared genetically different from adults (P=0·002) and juveniles (P〈0·001) while juveniles and adults were similar (P=0·100). The variations in allelic and genotypic frequencies in the larvae probably reflect a family-structure that is diluted once larvae are recruited into the lagoon because of high mortality and active movement of fish.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2002.tb01861.x
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  • 2
    Electronic Resource
    Electronic Resource
    Genetic and demographic variation among colour morphs of cabrilla sea bass (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 58 (2001), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The Mediterranean cabrilla sea bass Serranus cabrilla exhibits two colour morphs (red and yellow) that appear to be depth segregated, with yellow individuals found below 20 m and red ones found above 20 m. Morphology and otolith analyses show that yellow fish are larger and older. There were similar allelic frequencies between colour morphs, but significant differences in the genotypic frequencies with an increase of excess of heterozygotes in yellow specimens. It is proposed that the yellow fish are older and develop from younger red fish that have migrated to deeper water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2001.tb00559.x
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  • 3
    Electronic Resource
    Electronic Resource
    Genetic differentiation of white sea bream within the Lion's Gulf and the Ligurian Sea (Mediterranean Sea) (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 49 (1996), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: An allozymic study was conducted on 190 individuals of white sea bream, Diplodus sargus sampled on five locations throughout the Lion's Gulf and the Ligurian Sea (Mediterranean Sea), in order to identify genetic structure. Electrophoretic surveys carried out on muscle and liver tissues identified 25 loci of which 12 were polymorphic (P〈inlineGraphic alt="geqslant R: gt-or-equal, slanted" extraInfo="nonStandardEntity" href="urn:x-wiley:00221112:JFB613:ges" location="ges.gif"/〉0.95). G-test analysis shows significant differences on allelic frequencies between the five stations at six loci. Examination of the spatial structure was performed using Nei's distances and F statistics, and indicated significant genetic differences between three groups. A group which clustered Blanes (Spain), Marseille (France) and Livorno (Italy) where the absence of genetic difference can be explained by migration of larvae and adults along a coastal ‘continuum’. The Elba sample (Italy) shows genetic divergence from other samples and this difference may result from isolation due to limited migration of larvae and adults. Banyuls (France), differs from all other stations. Several hypotheses are proposed to explain genetic patterns including local current systems, larval dispersal, geographic isolation and historical effects, and variation in the size classes of sampled individuals between sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1996.tb00058.x
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  • 4
    Electronic Resource
    Electronic Resource
    Spatio-temporal variability in fish recruitment to a coral reef (Moorea, French Polynesia) (1993)
    Springer
    Coral reefs 12 (1993), S. 105-113 
    Details
    ISSN: 1432-0975
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Spatial and temporal patterns of recruitment of juvenile coral reef fishes were studied on the reefs of the high island of Moorea (Society Archipelago, French Polynesia) during the wet season (October 1988 to April 1989). Two size-classes of fishes (new-recruits and juveniles) were censused by visual counts within 24 quadrats along a transect across the lagoon. Correspondence analysis was used to calculate the hypothetical movements of the two size classes. Spatial variability was far more important than temporal variability; six main spatial communities were revealed, which could result from differences among habitats. Temporal variability in recuitment occurred only at nearshore stations; stations on the outer fringing reef and inner barrier reef displayed stable recruitment patterns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00302110
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  • 5
    Electronic Resource
    Electronic Resource
    Reef Sites (1995)
    Springer
    Coral reefs 14 (1995), S. 26-26 
    Details
    ISSN: 1432-0975
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304067
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  • 6
    Electronic Resource
    Electronic Resource
    Objectives and background to the 1994 Franco-Australian expedition to Taiaro Atoll (Tuamotu Archipelago, French Polynesia) (1998)
    Springer
    Coral reefs 17 (1998), S. 15-21 
    Details
    ISSN: 1432-0975
    Keywords: Key words Coral reef fishes ; Surveys ; Life cycle ; Hydrodynamics ; Larval dispersal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract  The 9 km2 uplifted lagoon of Taiaro Atoll (15°45′S, 144°38′W) is hypersaline due to its isolation from the ocean, yet it contains a high diversity of fish. The question unifying our expedition was to discover whether these assemblages could be self-sustaining despite very limited contact with the ocean. Although we were constrained by time, collections of fish larvae showed that some species can complete their life-cycle within the lagoon, while others differed genetically between the lagoon and the ocean, consistent with restricted gene flow. The lagoon contained few oceanic species of zooplankton, confirming its general isolation, but nevertheless some fish species may depend upon infrequent colonisation from the ocean (when large waves drive water over the normally dry reef crest). Isotopic signatures in fish otoliths suggest the basis for a more definitive and inclusive test of the sources of the lagoonal assemblage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003380050087
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  • 7
    Electronic Resource
    Electronic Resource
    Evidence of differentiated stocks of Acanthurus triostegus (Pisces, Acanthuridae) in French Polynesia, using electrophoretic data
    Amsterdam : Elsevier
    Fisheries Research 16 (1993), S. 287-299 
    Details
    ISSN: 0165-7836
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0165-7836(93)90142-T
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  • 8
    Electronic Resource
    Electronic Resource
    Variation in diversity of coral reef fish between French Polynesian atolls (1994)
    Springer
    Coral reefs 13 (1994), S. 175-180 
    Details
    ISSN: 1432-0975
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract The diversity of coral reef fish in seven atolls in French Polynesia is analyzed with respect to geomorphological characteristics of the atolls. The results show that size of the lagoon is more important than confinement in affecting overall fish diversity. This result suggests that island biogeographic theory, as developed by MacArthur and Wilson for terrestrial animals, also applies to reef fish in that more area gives more habitat complexity which, in turn, supports higher fish diversity. However, species diversity within a given family appears to be affected more by ecological parameters, such as living coral cover, food diversity, and reproductive behavior, than geomorphological features.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00301196
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  • 9
    Electronic Resource
    Electronic Resource
    Genetic evidence of closed life-cycles for some coral reef fishes within Taiaro Lagoon (Tuamotu Archipelago, French Polynesia) (1998)
    Springer
    Coral reefs 17 (1998), S. 9-14 
    Details
    ISSN: 1432-0975
    Keywords: Key words Population genetics ; Allozymes ; Larval dispersal ; Genetic drift
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract  Taiaro Lagoon has no permanent or regular connection with the ocean (ingress is restricted to episodes of high sea-level and/or strong wave action) raising the question of how fish populations with normally dispersive larvae are maintained inside this lagoon. We compared the genetic population structures of two coral reef fishes, Acanthurus triostegus and Chaetodon ulietensis, present on both sides of the atoll rim to determine whether there is evidence of reproductive isolation. Genetic surveys showed that the lagoonal and oceanic populations were statistically different at five loci (AAT * -3, GDA *, HPD *, MDH * and SDH *) in A. triostegus and three loci (PGI-2*, IDH * and PGD *) in C. ulietensis, producing high F st values of 0.055 and 0.021, respectively. Our genetic and demographic data on these species suggest that both may be completing their life-cycles inside the lagoon, which leads us to question the common assumption that coral reef fishes require oceanic conditions for larval development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003380050086
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Acanthochromis polyacanthus, a fish lacking larval dispersal, has genetically differentiated populations at local and regional scales on the Great Barrier Reef (1994)
    Springer
    Marine biology 121 (1994), S. 11-21 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Acanthochromis Gill is a monotypic genus within the damselfish family Pomacentridae, erected for an unusual species [A. polyacanthus (Bleeker)] that uniquely lacks larval dispersal. Instead, offspring are reared in the parental territory, in the manner of cichlids, and fledged into the surrounding habitat. Phenotypic and genotypic variation was surveyed on the basis of body colouration and 7 polymorphic loci in 19 populations from 5 regions of the central and southern Great Barrier Reef (GBR). Variation in both characters was found at regional and local scales. Two colour morphs were recognised: a bicoloured morph from the three northern regions and a uniform dark morph from the two southern regions. Isozyme analysis showed a similar pattern with greatest variation between the different morphs, but also with significant variation at both regional and local scales within morphotypes. Heterozygosity was maximal in the central populations, which, together with other measures of variability, suggests a mixing of separate gene pools in this region and denies species status to the two morphotypes despite numerous fixed differences in allele frequencies between the most distant populations. The presence of fixed differences in multiple alleles between populations separated by 1000 km indicates negligible gene flow over such distances and long isolation of these gene pools. These patterns may reflect recolonisation of the GBR after the last sea-level rise by fish from two stocks. Founder effects and random drift in small populations after colonisation are probably the major sources of the local and regional variations observed at smaller spatial scales. This diversity has been maintained among populations at all scales by the very low levels of gene flow possible without an effective strategy for larval dispersal between coral reefs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00349469
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