Table 1.
Sex ratios for each Lake Malawi cichild species.
Sex ratios for each family of Lake Malawi cichlid. The sex ratios (total # of males/total # of males + total # of females) were calculated for each family along with the average sex ratio for each species
| Species | Family | Males | Females | Unknown | Total | Sex Ratio | Binomial | Average sex ratio in species |
|---|---|---|---|---|---|---|---|---|
| Aulonocara baenschi | Aube-A002/A003/A005/A007 | 5 | 7 | 2 | 14 | 0.417 | 0.774 | 0.507 |
| Nkhomo Reef | Aube-A009 | 2 | 4 | 2 | 8 | 0.333 | 0.688 | |
| Aube-A013 | 12 | 3 | 2 | 17 | 0.800 | 0.035 | ||
| Aube-A014 | 6 | 15 | 2 | 23 | 0.286 | 0.078 | ||
| Aube-A022 | 6 | 4 | 10 | 0.600 | 0.754 | |||
| Aube-A023 | 7 | 4 | 11 | 0.636 | 0.549 | |||
| Cynotilapia ‘dwarf afra’ | Dcafra-A002 | 11 | 15 | 2 | 28 | 0.423 | 0.557 | 0.688 |
| Hai Reef | Dcafra-A019 | 22 | 0 | 22 | 1.000 | *** | ||
| Labeotropheus trewavasae | RltrMR009 | 10 | 7 | 17 | 0.588 | 0.629 | 0.515 | |
| Mapanga | RltrMR011 | 7 | 5 | 12 | 0.583 | 0.774 | ||
| RLtrMR012 | 6 | 9 | 15 | 0.400 | 0.607 | |||
| RltrMR015 | 11 | 11 | 22 | 0.500 | 1 | |||
| Metriaclima barlowi | MebaMBJ-A003 | 6 | 2 | 1 | 9 | 0.750 | 0.289 | 0.539 |
| Mbenjii Island | MebaMBJ-A006 | 3 | 7 | 10 | 0.300 | 0.344 | ||
| MebaMBJ-A009 | 5 | 3 | 8 | 0.625 | 0.727 | |||
| MebaMBJ-A010 | 0 | 11 | 11 | 0.000 | *** | |||
| MebaMBJ-A016 | 18 | 5 | 23 | 0.783 | * | |||
| MebaMBJ-A019 | 12 | 11 | 23 | 0.522 | 1 | |||
| MebaMBJ-A026 | 11 | 8 | 19 | 0.579 | 0.648 | |||
| Metriaclima benetos | MebeMZ-A002 | 11 | 10 | 21 | 0.524 | 1 | 0.410 | |
| Mazinzi Reef | MebeMZ-A006 | 6 | 13 | 10 | 29 | 0.316 | 0.167 | |
| MebeMZ-A007 | 11 | 26 | 3 | 40 | 0.297 | * | ||
| MebeMZ-A010 | 20 | 20 | 1 | 41 | 0.500 | 1 | ||
| Metriaclima callainos | Meca-A001 | 2 | 13 | 15 | 0.133 | ** | 0.137 | |
| Choifu Bay | Meca-A004 | 2 | 17 | 19 | 0.105 | *** | ||
| Meca-A005 | 1 | 18 | 19 | 0.053 | *** | |||
| RMca012 | 5 | 13 | 18 | 0.278 | 0.096 | |||
| RMca016 | 3 | 21 | 24 | 0.125 | *** | |||
| Metriaclima ‘daktari’ | Psda-A005 | 6 | 5 | 3 | 14 | 0.545 | 1 | 0.545 |
| Hai Reef | ||||||||
| Metriaclima fainzilberi | MefaLI-A002 | 5 | 12 | 17 | 0.294 | 0.143 | 0.140 | |
| Lundo Island | RMFI010 | 1 | 25 | 2 | 28 | 0.038 | *** | |
| Metriaclima fainzilberi | MefaLP-A001 | 1 | 21 | 22 | 0.045 | *** | 0.070 | |
| Lundo Point | MefaLP-A003 | 2 | 19 | 1 | 22 | 0.095 | *** | |
| Metriaclima ‘kompakt’ | MeblN-A001 | 10 | 13 | 1 | 24 | 0.435 | 0.678 | 0.488 |
| Southern Mbamba Bay | MeblN-A003 | 34 | 18 | 52 | 0.654 | * | ||
| Rmbl007 | 7 | 24 | 31 | 0.226 | ** | |||
| Rmbl004 | 8 | 8 | 16 | 0.500 | 1 | |||
| Metriaclima lombardoi | Melo-A001 | 2 | 15 | 2 | 19 | 0.118 | ** | 0.412 |
| Mbenjii Island | Melo-A003 | 0 | 5 | 5 | 0.000 | 0.063 | ||
| Melo-A015A | 5 | 8 | 13 | 0.385 | 0.581 | |||
| Melo-A015B | 3 | 5 | 8 | 0.375 | 0.727 | |||
| Melo-A016 | 7 | 3 | 1 | 11 | 0.700 | 0.344 | ||
| Melo-A017 | 2 | 6 | 8 | 0.250 | 0.289 | |||
| Melo-A019 | 10 | 13 | 23 | 0.435 | 0.678 | |||
| Melo-A026 | 18 | 12 | 30 | 0.600 | 0.362 | |||
| Metriaclima mbenji | Memb-A003 | 2 | 3 | 5 | 0.400 | 1 | 0.277 | |
| Mbenjii Island | Memb-A004 | 5 | 27 | 3 | 35 | 0.156 | *** | |
| RMmb002 | 5 | 12 | 17 | 0.294 | 0.143 | |||
| RMmb004 | 14 | 26 | 40 | 0.350 | 0.081 | |||
| Metriaclima msobo | Mems-A001/A002 | 15 | 14 | 2 | 31 | 0.517 | 1 | 0.517 |
| Lundo Island | ||||||||
| Metriaclima ‘mustardi’ | RMmus002 | 7 | 10 | 17 | 0.412 | 0.629 | 0.412 | |
| Metriaclima phaeos | MephNA-A001 | 14 | 18 | 3 | 35 | 0.438 | 0.597 | 0.504 |
| Undu Point | MephNA-A006 | 16 | 15 | 3 | 34 | 0.516 | 1 | |
| MephNA-A007 | 10 | 11 | 2 | 23 | 0.476 | 1 | ||
| Meph-A008 | 4 | 7 | 3 | 14 | 0.364 | 0.549 | ||
| Meph-A009 | 6 | 8 | 14 | 0.429 | 0.791 | |||
| Meph-A014 | 14 | 4 | 18 | 0.778 | * | |||
| Metriaclima pyrsonotus | Mepy-A002 | 14 | 5 | 19 | 0.737 | 0.064 | 0.187 | |
| Nakantenga Island | Mepy-A006 | 2 | 12 | 14 | 0.143 | * | ||
| Mepy-A009 | 2 | 26 | 1 | 29 | 0.071 | *** | ||
| Mepy-A010 | 1 | 21 | 22 | 0.045 | *** | |||
| Mepy-A013 | 0 | 29 | 29 | 0.000 | *** | |||
| Mepy-A014 | 4 | 24 | 28 | 0.143 | *** | |||
| Mepy-A017 | 8 | 17 | 25 | 0.320 | 0.108 | |||
| Mepy-A022 | 3 | 28 | 1 | 32 | 0.097 | *** | ||
| Mepy-A025 | 5 | 19 | 24 | 0.208 | ** | |||
| Mepy-A027 | 3 | 20 | 23 | 0.130 | *** | |||
| Mepy-A030 | 9 | 11 | 20 | 0.450 | 0.824 | |||
| RMpy007 | 5 | 10 | 3 | 18 | 0.333 | 0.302 | ||
| RMpy011 | 0 | 11 | 11 | 0.000 | *** | |||
| RMpy012 | 0 | 19 | 19 | 0.000 | *** | |||
| RMpy013 | 0 | 15 | 15 | 0.000 | *** | |||
| RMpy018 | 9 | 20 | 29 | 0.310 | 0.061 | |||
| RMpy021 | 9 | 35 | 44 | 0.205 | *** | |||
| Metriaclima saulosi | Mesa-A001 | 6 | 1 | 7 | 0.857 | 0.125 | 0.706 | |
| Taiwan Reef | MesaNA-A005 | 0 | 12 | 12 | 0.000 | *** | ||
| MesaNA-A009 | 38 | 3 | 2 | 43 | 0.927 | *** | ||
| MesaNA-A12 | 4 | 4 | 8 | 0.500 | 1 | |||
| Metriaclima zebra Mazinzi Reef | MezeMZR-A003 | 12 | 15 | 1 | 28 | 0.444 | 0.701 | 0.305 |
| Mazinzi Reef | MezeMZR-A004 | 4 | 2 | 6 | 0.667 | 0.688 | ||
| MezeMZR-A005 | 2 | 3 | 2 | 7 | 0.400 | 1 | ||
| MezeMZR-A006 | 1 | 24 | 25 | 0.040 | *** | |||
| MezeMZR-A007 | 4 | 8 | 12 | 0.333 | 0.388 | |||
| MezeMZR-A009 | 7 | 18 | 25 | 0.280 | * | |||
| MezeMZR-A010 | 6 | 16 | 22 | 0.273 | 0.052 | |||
| MezeMZR-A011 | 14 | 28 | 42 | 0.333 | * | |||
| Metriaclima zebra ‘Nankoma blue’ | Mena-A006 | 21 | 12 | 6 | 39 | 0.636 | 0.163 | 0.440 |
| Maleri Islands Ribbinck Nakoma G | Mena-A7/21 | 21 | 34 | 1 | 56 | 0.382 | 0.105 | |
| Mena-A8/17 | 31 | 51 | 82 | 0.378 | * | |||
| Mena-A018 | 23 | 25 | 48 | 0.479 | 0.885 | |||
| Pseudotropheus polit | Pspo-A003 | 7 | 9 | 2 | 18 | 0.438 | 0.804 | 0.511 |
| Lions Cove | Pspo-A004 | 5 | 5 | 10 | 0.500 | 1 | ||
| PspoLC-A005-B003 | 12 | 9 | 21 | 0.571 | 0.664 | |||
| Totals | Males | Females | Unknown | Individuals | Average Sex Ratio | |||
| 746 | 1250 | 70 | 2066 | 0.375 | ||||
| Mean | 8 | 13 | 2 |
*
P <0.05
**
P <0.01
***
P <0.001