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17 results for “Labeotropheus”
Quantitative trait loci mapping in cichlid fishes: Aulonocara koningsi x Metriaclima mbenjii and Labidochromis caeruleus x Labeotropheus trewavasae
<p>Since the time of Darwin, biologists have sought to understand the evolution and origins of phenotypic variation. To understand the genetic and molecular sources of morphological differences, we capitalize on the cichlid fish system. Cichlids of the East African Rift Lakes have undergone an extensive adaptive radiation, including variation in body shape, head shape, and pigmentation. These morphological differences are often intimately linked to the ecology and behavior of these animals. Here, we investigate the genetic basis of these phenotypes using quantitative trait loci (QTL) mapping using four genera of Lake Malawi cichlids and two F<sub>2</sub> hybrid populations. The first hybrid cross is between <em>Aulonocara koningsi</em>, which lives in the open sandy region and feeds insects from the open sand, and <em>Metriaclima mbenjii</em>, an omnivore rock-dwelling fish. The second cross is between <em>Labidochromis caeruleus</em>, a suction-feeding insectivore that swims continuously searching for prey, and <em>Labeotropheus trewavasae</em>, which feeds by biting or scraping attached algae from the rocks in its benthic habitat. Such work can provide insights into the molecular basis of phenotypic adaptation, the genetic architecture of morphology, and the evolution of cichlid fishes.</p>
Quantitative trait loci mapping in cichlid fishes: Aulonocara koningsi x Metriaclima mbenjii and Labidochromis caeruleus x Labeotropheus trewavasae
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FIG. 12 in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 12. Labeotropheus obscurus, new species. (A) Live male holotype (SAIAB 211380), 78.2 mm SL; (B) holotype after preservation; (C) live female paratype (FMNH 145013), 75.6 mm SL; (D) live male paratype (FMNH 145013), 78.3 mm SL, displaying a primarily blue color pattern.
FIG. 8 in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 8. Comparison of jaw and snout dimensions among L. fuelleborni and the two newly described robust Labeotropheus from northwestern Lake Malaŵi. (A) Lower jaw length versus lower jaw width; (B) snout length versus snout width. The ANOVA accompanying these data is in Table 9.
FIG. 7 in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 7. Canonical function plots for the robust Labeotropheus from the Luromo Peninsula. (A) Morphometric canonical function 1 vs. meristic canonical function 1; (B) meristic canonical function 1 vs. meristic canonical function 2.
FIG. 2 in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 2. Labeotropheus alticodia, new species. (A) Live male holotype (SAIAB 211372), 78.2 mm SL; (B) live female paratype (SAIAB 211373), 85.1 mm SL; (C) holotype after preservation.
FIG. 11 in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 11. Plot of morphometric canonical function 1 vs. meristic canonical function 1 for L. chirangali, L. simoneae, and L. trewavasae.
FIG. 3. Body depth–standard length relationships among L. fuelleborni, L in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 3. Body depth–standard length relationships among L. fuelleborni, L. trewavasae, and the three new species of Labeotropheus from the southwestern portion of Lake Malaŵi. The ANOVA accompanying these data is in Table 4.
FIG. 9 in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 9. Labeotropheus candipygia, new species. (A) Live male holotype (SAIAB 211376) from Chitende Island, 82.1 mm SL; (B) holotype after preservation; (C) live female paratype (MPM Fi50067) from Chitende Island, 90.8 mm SL; (D) live male paratype (MPM Fi50078) from Chitende Gap, 67.1 mm SL.
FIG. 10 in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 10. Labeotropheus chirangali, new species. (A) Live male holotype (SAIAB 211378), 97.8 mm SL; (B) holotype after preservation; (C) live female paratype (MPM Fi50076), 84.9 mm SL.
FIG. 1 in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 1. Maps of Lake Malaŵi indicating locations where specimens of Labeotropheus were collected. (A) Lake Malaŵi; (B) locations visited in 2018, near the Luromo Peninsula in the northwestern portion of the lake; (C) locations visited in 2020, in the southwestern portion of the lake.
FIG. 5 in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 5. Labeotropheus aurantinfra, new species. (A) Live male holotype (SAIAB 211375), 114.8 mm SL; (B) live holotype with dorsal fin elevated; (C) holotype after preservation; (D) live female paratype (MPM Fi50071) with 'orange-blotch' ('OB') color pattern, 88.7 mm SL; (E) live male paratype (MPM Fi50071) with gray blue coloration, 111.7 mm SL; (F) ventral surface of male from E showing orange throat and branchiostegals; (G) live male paratype (MPM Fi50071) with extensive orange pigmentation and green sheen on head and dorsum, 98.4 mm SL; (H) ventral surface of male from G showing orange throat and branchiostegals.
FIG. 4 in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 4. Canonical function plots for robust Labeotropheus from the southwestern portion of Lake Malaŵi. (A) Morphometric canonical function 1 vs. meristic function 2; (B) meristic canonical function 1 vs. meristic function 2.
FIG. 13 in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 13. Labeotropheus rubidorsalis, new species. (A) Live male holotype (SAIAB 211383), 91.2 mm SL; (B) holotype after preservation; (C) live female paratype (MPM Fi50090), 69.4 mm SL.
FIG. 6. Body depth–standard length relationships among L. fuelleborni, L. trewavasae, L. chlorosiglos, L in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 6. Body depth–standard length relationships among L. fuelleborni, L. trewavasae, L. chlorosiglos, L. simoneae, and the three new species of Labeotropheus from the northwestern portion of Lake Malaŵi. (A) All seven species; (B) same plot as A, but L. fuelleborni and L. trewavasae are omitted for clarity. The ANOVA accompanying these data is in Table 7.
FIG. 15. A in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 15. A comparison of the similarly colored species from the islands around the Luromo Peninsula, L. aurantinfra, L. chlorosiglos, and L. simoneae.
FIG. 14 in Six New Species of Labeotropheus (Cichliformes: Cichlidae) from the Malaŵian Shore of Lake Malaŵi, Africa
FIG. 14. Histogram of meristic canonical function 1 for L. rubidorsalis and L. trewavasae.
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