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14 results for “Sarotherodon melanotheron”
F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies
F. 6. Neighbour-joining cladogram of the different mtDNA haplotypes identified in S. melanotheron, including cytochrome b sequences of six outgroup species: Oreochromis niloticus, Onil; O. tanganicae, Otan; O. malagarasi, Omal; O. mossambicus, Omos; O. aureus, Oau; Sarotherodon galilaeus, Sgal. Genetic distances were calculated following Kimura's (1980) two-parameter model. For abbreviations of haplotypes see table 1.
F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies
F. 7. Historical biogeographic scenario proposed for S. melanotheron/S. nigripinnis. Main migration routes/expansions from the centre of origin (Congo-Brazzaville/Gabon) are indicated by arrows. The systematic revision of the subspecies complex as proposed in this study is also indicated. The concrete species border between S. melanotheron and S. nigripinnis presently remains unknown.
F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies
F. 5. Unrooted neighbour-joining phylogeny of the 26 different mtDNA haplotypes identified within the sequenced part of the cytochrome b gene (307 bp). Genetic distances were calculated using Kimura's (1980) two-parameter model. The numbers at each node indicate percentage recovery of the particular node (1000 replicates). For abbreviations of haplotypes see table 1.
F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies
F. 2. Plot of factor 1 taken from a PCA on six meristic counts and factor 3 taken from a PCA on 18 log-transformed measurements of 187 specimens. Populations from 'natural' environments are illustrated.
F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies
F. 1. Geographic origin of the S. melanotheron samples examined. The numbering of the sampling localities corresponds to the listing of populations as indicated in table 1.
F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies
F. 4. Genetic relationships between the populations of S. melanotheron examined, based on allozyme data and globin chain characteristics. Unrooted bootstrap 50% majority rule consensus tree. The branch lengths correspond to the number of character changes along the branches. Numbers indicate the percentage obtained using bootstrapping (1000 replicates). For abbreviations of populations see table 1.
FIG. 5 in Morphometric and allozyme variation in the black-chinned tilapia Sarotherodon melanotheron (Perciformes, Cichlidae), with a revision of the subspecies complex
FIG. 5. The aberrant pattern of the lateral line in S. melanotheron specimens from Niayes, Senegal (above) compared to the normal pattern of specimens from all other populations studied (below).
FIG. 4 in Morphometric and allozyme variation in the black-chinned tilapia Sarotherodon melanotheron (Perciformes, Cichlidae), with a revision of the subspecies complex
FIG. 4. Plot of a principal component analysis using 22 log-transformed measurements taken on 155 specimens of Sarotherodon melanotheron. (a) Only the Niayes (Senegal) and the St. Louis (Senegal) 1 Murry Town (Sierra Leone) populations are illustrated. (b) Only the Keta (Ghana) 1 Lome (Togo) and the Ayame (Ivory Coast) populations are illustrated.
FIG. 3 in Morphometric and allozyme variation in the black-chinned tilapia Sarotherodon melanotheron (Perciformes, Cichlidae), with a revision of the subspecies complex
FIG. 3. Plot of a principal component analysis using 22 log-transformed measurements taken on 155 specimens of S. melanotheron. Only populations from`natural' environments are illustrated.
FIG. 2 in Morphometric and allozyme variation in the black-chinned tilapia Sarotherodon melanotheron (Perciformes, Cichlidae), with a revision of the subspecies complex
FIG. 2. Measurements taken on S. melanotheron specimens (modi®ed from Teugels and Hanssens, 1995). 1. Total pharyngeal bone width; 2. Toothed pharyngeal bone width; 3. Pharyngeal bone length; 4. Standard length; 5. Head length; 6. Snout length; 7. Eye diameter; 8. Interorbital distance (not illustrated); 9. Preorbital bone length; 10. Body depth; 11. Caudal peduncle depth; 12. Caudal peduncle length; 13. Predorsal distance; 14. Prepectoral distance; 15. Prepelvic distance; 16. Preanal distance; 17. Dorsal ®n length; 18. Dorsal ®n heigth; 19. Pectoral ®n length; 20. Pelvic ®n length; 21. Anal ®n length; 22. Anal ®n height.
FIG. 1 in Morphometric and allozyme variation in the black-chinned tilapia Sarotherodon melanotheron (Perciformes, Cichlidae), with a revision of the subspecies complex
FIG. 1. Geographic origin of S. melanotheron samples examined during the present study. 1. St. Louis (Senegal); 2. Hann (Senegal); 3. Niayes (Senegal); 4. Murry Town (Sierra Leone); 5. Ebrie Lagoon (Ivory Coast); 6. Lake Ayame (Ivory Coast); 7. Abbey Lagoon (Ghana); 8. Benya Lagoon (Ghana); 9. Fosu Lagoon (Ghana); 10. Amisa Lagoon (Ghana); 11. Densu River (Ghana); 12. Kpeshi Lagoon (Ghana); 13. Keta Lagoon (Ghana); 14. Lome Lagoon (Togo); 15. Guezin at Lake Aheme (Benin); 16. Zogbo at Lake Nokoue (Benin); 17. Sotchanhoue at Lake Nokoue (Benin); 18. Kouilou (Congo).
FIG. 6 in Morphometric and allozyme variation in the black-chinned tilapia Sarotherodon melanotheron (Perciformes, Cichlidae), with a revision of the subspecies complex
FIG. 6. Phenotypic allelic variations at several enzyme coding loci (EST-2; LDH-2; GPI-2; MDH-2; PGM-1; AAT -3) analysed by discontinuous polyacrylamide gradient gel electrophoresis. The molecular weights (kDa) of allelic variants are indicated and also listed in table 2. Heterozygote states are shown for EST -2 (lane 3, 5), LDH-2 (lane 1), MDH-2 (lane 1) and PGM-1 (lane 1). Abbreviations: e, erythrocytes; m, muscle.
FIG. 7 in Morphometric and allozyme variation in the black-chinned tilapia Sarotherodon melanotheron (Perciformes, Cichlidae), with a revision of the subspecies complex
FIG. 7. Genetic relationships between the populations of S. melanotheron examined, based on allozyme data (present study) and globin chain characteristics (Falk et al. 1999). Bootstrap 50% majority rule consensus tree rooted by the population from the Lower Kouilou (Congo). Numbers below branches indicate the percentage obtained using bootstrapping (1000 replicates). Above branches: number of character changes along branches. Tree length: 44 steps. Consistency index: 0.864.
F in Revision and biogeographical analysis of the black-chinned tilapia Sarotherodon melanotheron (Teleostei, Cichlidae): results of morphometric, allozyme, globin chain and mtDNA studies
F. 3. Plot of factor 1 taken from a PCA on six meristic counts and factor 3 taken from a PCA on 18 log-transformed measurements including the 60 specimens from Congo- Brazzaville (Loeme and Kouilou) and Gabon (Santa Clara) and three syntypes of Tilapia dolloi Boulenger 1899.
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