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19 results for “Neolamprologus”
Fighting investment of Neolamprologus pulcher after receiving single, reinforcing, and contradictory contest experiences
<p>When animals live in long-term groups, the potential for conflict is high. Conflict is costly, so an individual's decision to engage depends on the information it has about the costs and benefits of fighting. One source of information could be past contest experience, where previous winners/losers typically become more likely to win/lose in the future. However, repeated interactions can familiarize individuals with conflict and provide opportunities to learn to become better fighters, regardless of outcome. We explored how individuals integrate information from previous contests to inform future encounters in a group-living fish, <em>Neolamprologus pulcher</em>. We gave contestants single, reinforcing, and contradictory experiences and measured behavior and post-fight water-borne levels of androgenic steroids (testosterone, 11-ketotestosterone). Contradictory outcomes were associated with reduced investment in fighting. More fighting experience did not lead to greater investment in fighting, as consecutive losses resulted in reduced aggression. Also, there was no effect of fighting treatment on water-borne androgen concentrations. Interestingly, there were sex differences in which behaviors were influenced by experience, and in whether body mass was associated with androgen concentrations, which could indicate that males and females vary in how perceived fighting ability changes with contest experience. Our data reveal the complex ways in which repeated experiences can alter an individual's propensity to invest in conflict. Repeated interactions associated with predictable changes in behavior can contribute to rank stability in groups and our results indicate that whether and how they do depend on the quality and quantity of interactions plus individual factors such as sex.</p>
Life history traits and survival rate in <em>Neolamprologus buescheri</em>
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Fighting investment of Neolamprologus pulcher after receiving single, reinforcing, and contradictory contest experiences
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FIGURE 9. Habitat. A. Neolamprologus walteri, Muzungu Beach. B in Two new cichild species Neolamprologus (Teleostei: Cichlidae) from Lake Tanganyika, East Africa
FIGURE 9. Habitat. A. Neolamprologus walteri, Muzungu Beach. B. Neolamprologus chitamwebwai, Cape Bangwe.
FIGURE 8 in Two new cichild species Neolamprologus (Teleostei: Cichlidae) from Lake Tanganyika, East Africa
FIGURE 8. The lachrymal bone of A. Neolamprologus walteri (SAIAB 57912, SL 43.2 mm) and B. Neolamprologus chitamwebwai (SAIAB 57913, SL 55.4 mm).
FIGURE 2 in Two new cichild species Neolamprologus (Teleostei: Cichlidae) from Lake Tanganyika, East Africa
FIGURE 2. Lateral view of the holotypes. A. Neolamprologus walteri, SAIAB 56090, male, 48.4 mm SL. B. Neolamprologus chitamwebwai, SAIAB 56270, female, 56.5 mm SL.
FIGURE 4 in Two new cichild species Neolamprologus (Teleostei: Cichlidae) from Lake Tanganyika, East Africa
FIGURE 4. Bangwe peninsula, with the type locality of Neolamprologus walteri (Tembo Rock) and Neolamprologus chitamwebwai (Cape Bangwe). The area shown is 4 by 5 km. Central position is about 4°54' S and 29°36'E. The town Kigoma is located immediately north of the figure.
FIGURE 5 in Two new cichild species Neolamprologus (Teleostei: Cichlidae) from Lake Tanganyika, East Africa
FIGURE 5. Regression of ratios of various morphometrics on standard length and head length. Abbreviations: walt = N. walteri (n = 29), chit = N. chitamwebwai (n = 14), bric = N. brichardi (n = 7, including holotype), savo = N. savoryi (n = 6, including holotype), falc = N. falcicula (holotype and 3 paratypes). Others = one specimen each of N. gracilis, N. pulcher, N. olivaceous, N. splendens, N. crassus, N. marunguensis and N. helianthus. The holotype for all "others" was used, except for N. pulcher (paratype). A. Body depth. B. Cheek depth. C. Preorbital depth. Linear fits are included for the data for Neolamprologus walteri (thin lines) and N. chitamwebwai (heavy lines) in A–C and for N. falcicula (dashed lines) in C. Intercepts of the fits of N. walteri and N. chitamwebwai are significantly different (Ancova, P <0.002) in A and B, while the slopes are the same. Intercepts of the fits of N. walteri and N. falcicula are significantly different (Ancova, P <0.002) in C.
FIGURE 7 in Two new cichild species Neolamprologus (Teleostei: Cichlidae) from Lake Tanganyika, East Africa
FIGURE 7. Lower pharyngeal jaw, dorsal (left), ventral (right) and lateral views. A. Neolamprologus walteri, B. Neolamprologus chitamwebwai. Scale bar 1 mm.
FIGURE 3. A in Two new cichild species Neolamprologus (Teleostei: Cichlidae) from Lake Tanganyika, East Africa
FIGURE 3. A. Neolamprologus walteri, topotype, GMNH 4419, 46.0 mm SL, Tembo Rock, Lake Tanganyika, 4°53'13"S 29°36'45"E, Tanzania. B. Neolamprologus chitamwebwai, topotype, GMNH 4420, 71.0 mm SL, Cape Bangwe, Lake Tanganyika, 4°54'44"S 29°35'55"E, Tanzania.
FIGURE 6 in Two new cichild species Neolamprologus (Teleostei: Cichlidae) from Lake Tanganyika, East Africa
FIGURE 6. Top row: lateral view (left) of the left premaxilla and dorsal view (right) of lower jaw. Bottom row: lateral and dorsal view of first gill arch and rakers. A. Neolamprologus walteri, B. Neolamprologus chitamwebwai. Scale bar 1 mm.
FIGURE 10. The upper lateral line descends 1 in Two new cichild species Neolamprologus (Teleostei: Cichlidae) from Lake Tanganyika, East Africa
FIGURE 10. The upper lateral line descends 1 scale row near its caudal end in 43 % of specimens of Neolamprologus chitamwebwai (SAIAB 58256, 61.4 mm). Note pitted scales and (tubed) canal scales in the upper and lower lateral lines.
FIGURE 4 in Geographic variation in Neolamprologus niger (Poll, 1956) (Perciformes: Cichlidae) from Lake Tanganyika (Africa)
FIGURE 4. Plot of the individual scores on PC 1 and PC 2 (meristics) of Neolamprologus niger. Polygons include the specimens originating from the three geographical groups: a northern group with populations from Luhanga (, n = 7) and Bemba (, n = 4); a central group with populations from Ubwari East (Π, n = 4) and Ubwari West (, n = 5); a southern group with populations from Yungu (Ģ, n = 2), Kabimba (, n =7) and Kalemie (☺, n =1).
FIGURE 3 in Geographic variation in Neolamprologus niger (Poll, 1956) (Perciformes: Cichlidae) from Lake Tanganyika (Africa)
FIGURE 3. Plot of the individual scores on PC 2 and PC 3 (log-transformed measurements) of Neolamprologus niger. Polygons include the specimens originating from the three geographical groups: a northern group with populations from Luhanga (, n = 7) and Bemba (, n = 4); a central group with populations from Ubwari East (Π, n = 4) and Ubwari West (, n = 5); a southern group with populations from Yungu (Ģ, n = 2), Kabimba (, n =7) and Kalemie (☺, n =1).
FIGURE 2 in Geographic variation in Neolamprologus niger (Poll, 1956) (Perciformes: Cichlidae) from Lake Tanganyika (Africa)
FIGURE 2. Lateral view on head of Neolamprologus niger with indication of the various regions with scales (see text for definitions).
FIGURE 1 in Geographic variation in Neolamprologus niger (Poll, 1956) (Perciformes: Cichlidae) from Lake Tanganyika (Africa)
FIGURE 1. Lake Tanganyika and the distribution of Neolamprologus niger. Luhanga (); Bemba (); Ubwari East (Π); Ubwari West (); Yungu (Ģ); Kabimba (); Kalemie (☺).
FIGURE 1 in Two new cichild species Neolamprologus (Teleostei: Cichlidae) from Lake Tanganyika, East Africa
FIGURE 1. Type localities of all species in the Neolamprologus savoryi complex at Lake Tanganyika.
Supplementary material 1 from: Wang J, Tai J, Zhang W, He K, Lan H, Liu H (2023) Comparison of seven complete mitochondrial genomes from Lamprologus and Neolamprologus (Chordata, Teleostei, Perciformes) and the phylogenetic implications for Cichlidae. ZooKeys 1184: 115-132. https://doi.org/10.3897/zookeys.1184.107091
Summary of the mitochondrial genomes used for phylogenetic analysis
Neolamprologus pulcher
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