Table 1.
Short description of data collected for the HerpSexDet database.
| Category | Variable name | Short description |
|---|---|---|
| GSD | GSD_type | Type of heterogamety. Usually XX/XY, ZW/ZZ, complex XX/XY or complex ZW/ZZ. |
| Sex_chromosome_karyotype | Have sex chromosomes been identified by karyotyping? Values: homomorphic or identified. | |
| Size_difference | Size difference between the sex chromosomes is indicated by “yes”, no difference is indicated by “no”. Note that this information was collected non-systematically in this first version of HerpSexDet. | |
| Larger_chromosome | The relatively larger sex chromosome (X, Y, Z, or W). | |
| TSD | TSD_type | TSD reaction norm. Usually MF (type Ia), FM (type Ib), or FMF (type II). |
| TSD_type_detailed | More detailed categorization of the TSD reaction norm, including information on even sex ratios. | |
| Low_temperature_sex | The phenotypic sex in excess at the lower range of investigated temperatures: male, female, or even. | |
| Low_temperature_threshold | Temperature (°C) below which biased sex ratio is produced. | |
| Intermediate_temperature_sex | The phenotypic sex in excess at the intermediate range of investigated temperatures: male, female, or even. | |
| High_temperature_sex | The phenotypic sex in excess at the higher range of investigated temperatures: male, female, or even. | |
| High_temperature_threshold | Temperature (°C) above which biased sex ratio is produced. | |
| Sex reversal | Thermal_sex_reversal_proven | Is there experimental evidence for thermally induced sex reversal? Yes or no, if it was studied. |
| Sex_reversal_in_nature | Combinations of sexual genotypes and phenotypes found in wild populations. | |
| Other | Polyploid | Information on the occurrence of polyploidy. |
Detailed description including further column names for references, notes and curators is available at39.