TABLE 1.
Characteristics of host species sampled in 2014 at Makobe, Sweya and Kissenda islands: diet, number of fish individuals, water depth, SL standard length, weight, CF condition factor
| Host species | Diet | nr fish | nr identified Cichlidogyrus | Depth (m) | SL (mm) | Weight (g) | CF | nr fish | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2014 | Mean | (Min–Max) | Mean | (Min–Max) | Mean | (Min–Max) | mean | (Min–Max) | 2010 | |||||
| Makobe | ||||||||||||||
| ■ | ● | Astatoreochromis alluaudi | Mollusc | 17 | 38 | 9.59 | (0.75–18.5) | 111.28 | (70.9–130.8) | 46.59 | (10.8–71.5) | 3.09 | (2.72–3.46) | 10 |
| Harpagochromis vonlinnei | Fish | 2 | 15 | (11–19) | 133.29 | (125.3–141.3) | 68.54 | (68.5–68.5) | 2.32 | (2.2–2.43) | 0 | |||
| ■ | ● | Labrochromis sp. ‘stone’ | Mollusc | 1 | 3 | 19 | (19–19) | 130.75 | (130.8–130.8) | 65.45 | (65.5–65.5) | 2.84 | (2.84–2.84) | 14 |
| ● | Lipochromis melanopterus | Fry | 2 | 8.75 | (5.5–12) | 91.96 | (80.8–103.1) | 24.76 | (16.5–33) | 2.94 | (2.9–2.99) | 8 | ||
| Lithochromis sp. ‘yellow chin pseudonigricans’ | Insect | 10 | 10.95 | (9–19) | 92.05 | (79.7–113) | 34.57 | (21.3–47.9) | 2.52 | (2.23–3.26) | 0 | |||
| ■ | ● | Mbipia lutea | Algae | 7 | 14 | 1 | (1–1) | 139.68 | (136–142) | 76.87 | (67.1–83.4) | 2.81 | (2.56–3.08) | 13 |
| ■ | ● | Mbipia mbipi | Algae | 16 | 22 | 1.88 | (1–2.5) | 97.33 | (84.7–113.2) | 30.31 | (20.3–40.5) | 2.87 | (2.54–3.72) | 16 |
| ■ | ● | Neochromis gigas | Algae | 8 | 15 | 1.22 | (1–2.75) | 114.99 | (86.2–127.3) | 43.11 | (17.9–52.4) | 2.75 | (2.52–2.94) | 13 |
| ■ | ● | Neochromis omnicaeruleus | Algae | 26 | 25 | 4.84 | (2.5–9.5) | 91.86 | (74–110.5) | 23.78 | (11.3–41.6) | 2.82 | (2.28–3.54) | 9 |
| ■ | ● | Neochromis rufocaudalis | Algae | 16 | 13 | 2.61 | (0.75–3.5) | 89.21 | (61.4–100) | 20.28 | (6.4–26.3) | 2.7 | (2.41–3.08) | 9 |
| ■ | ● | Neochromis sp. ‘unicuspid scraper’ | Algae | 32 | 23 | 13.18 | (1.25–19) | 96.73 | (76.6–114.4) | 26.16 | (10.9–49.4) | 2.69 | (2.19–3.21) | 8 |
| ■ | ● | Pundamilia nyererei | Plankton | 71 | 34 | 10.61 | (2.5–18.5) | 81.28 | (63–106.7) | 17.69 | (7–41.9) | 2.74 | (2.06–3.41) | 10 |
| ■ | ● | Pundamilia sp. ‘pink anal’ | Plankton | 18 | 15 | 9.92 | (5.5–19) | 91.79 | (77.9–120.8) | 24.78 | (12.2–59.1) | 2.8 | (2.37–3.43) | 10 |
| ■ | ● | Pundamilia pundamilia | Insect | 56 | 21 | 1.69 | (0.5–16) | 95.32 | (52.1–128.8) | 33.54 | (3.7–71.3) | 3.15 | (2.5–3.76) | 9 |
| ■ | ● | Paralabidochromis chilotes | Insect | 9 | 5 | 12.28 | (1.5–19) | 106.35 | (81.1–120.8) | 47.13 | (34.1–53.7) | 2.46 | (2.09–2.95) | 11 |
| ■ | ● | “Haplochromis” cyaneus | Insect | 14 | 16 | 2.71 | (1–6.5) | 100.16 | (81.4–107.9) | 24.43 | (12.3–33.7) | 2.32 | (2.08–2.63) | 9 |
| ● | Paralabidochromis sauvagei | Insect | 11 | 7.5 | (3.5–14) | 103.18 | (93.7–115.4) | 30.74 | (11.3–44.8) | 2.76 | (1.06–3.42) | 11 | ||
| ● | Paralabidochromis sp. ‘short snout scraper’ | Algae | 11 | 4.59 | (3–6) | 105.31 | (93.5–115.5) | 37.32 | (22.8–44.8) | 3.04 | (2.7–3.29) | 9 | ||
| Sweya | ||||||||||||||
| ■ | Astatoreochromis alluaudi | Mollusc | 6 | 19 | 0.5 | (0.5–0.5) | 63.63 | (48.2–80.3) | 8.85 | (2.9–15.6) | 2.89 | (2.5–3.26) | 0 | |
| ■ | Pseudocrenilabrus multicolor | Insect | 20 | 12 | 0.5 | (0.5–0.5) | 39.6 | (32.8–46.8) | 1.94 | (1.1–2.7) | 3.01 | (2.19–3.86) | 0 | |
| Kissenda | ||||||||||||||
| ■ | Pundamilia sp. ‘nyererei‐like’ | Insect | 32 | 6 | 4.16 | (0.75–7.5) | 73.42 | (60.1–88.9) | 11.56 | (4.8–26.7) | 2.68 | (1.92–3.68) | 0 | |
| ■ | Pundamilia sp. ‘pundamilia‐like’ | Insect | 31 | 13 | 3.04 | (0.75–7.5) | 76.21 | (49.3–108.1) | 13.96 | (2.8–38.5) | 2.58 | (1.58–3.46) | 0 | |
| ■ | Ptyochromis xenognathus | Mollusc | 0 | 18 | 3.03 | (1.5–7) | 107.76 | (97.4–115.4) | 37.39 | (29.8–44.9) | 2.93 | (2.63–3.16) | 10 | |
Species labelled with a circle (●) were also sampled in 2010 (only sample sizes reported, other data available in Karvonen et al., 2018), and those with a square (■) were used to assess Cichlidogyrus diversity (number of identified worm specimens reported).