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Blanquita de la col (Pieris rapae)


[Phenology]

[The flight curve is calculated as a relative abundance throughout the BMS season based on data from stations from the same climatic region. The graph shows the phenology for each climatic region in which the species is regularly recorded. For more information on the calculation method, see the Data Analysis section.]

[This graph shows the average number of individuals seen between March and September on the set of CBMS transects.]


[Habitat preferences]

[The habitat preference of a species is shown in the following graph, which represents as a percentage the average annual density (specimens per 100 m) of the species in each habitat type. For more information, visit the data analysis section.]


[Specialization] ⇒
SSI = 0.532

[Specialization Index (SSI)]

[The degree of specialization for a given habitat type is calculated with the Species Specialization Index (SSI). The graph shows the species’ SSI position with respect to the rest of species recorded in the CBMS network. This graph has been re-scaled in categories between 1 and 10 for an easier interpretation. Generalist species occupy the lower levels, while specialist species occupy the higher ones. For more information, visit the data analysis section.]


[Closed] ⇐ ⇒ [Open]
TAO = 0.464

[Closed-Open Index (TAO)]

[The TAO index orders species in the CBMS network along an axis of preference from closed to open habitats. It is calculated by assigning positive values for open habitats and negative values for closed habitats, and then obtaining an average value for each species that reflects its preference in the CBMS network. Negative values indicate a preference for closed environments and positive values for open environments. For more information, visit the data analysis section.]


[Altitude distribution]

[Bars represent the average abundance of the species (annual average number of specimens per 100 m) in altitudinal ranges of 200 m. Lines show abundance ranges (minimum-maximum). You can check the exact values of abundance, as well as the sample size (number of transects) by passing the mouse over the bars.]


[Population trend]

[The graph shows the temporal trends in abundance (with 95% confidence intervals) at regional level (i.e. climatic region) and in the CBMS network as a whole (in general). You can click on the box below to change the climatic region. For more details on how the annual index of abundance is calculated, see the Data Analysis section.]

El gràfic mostra el model d'evolució de l'abundància a nivell regional pel període estudiat. S'assigna un valor de referència d'1 a l'any inicial (línia horitzontal) i a partir d'aquí es calcula la variació de l'abundància en el conjunt d'itineraris. Per més detalls sobre com s’ha calculat aquest índex adreceu-vos a l'apartat análisi de les dades.

Tendència de l'espècie: Estable

[Maps of abundances and trends]

[The map of abundances show the average annual abundance of the species in the CBMS network over the entire data series. By clicking on the dots on this map you can access the station datasheet. The trends map show the trends of the species in each of the transects. By clicking on the dots on this map you can access to the ‘species x transect’ datasheet. Information given in the table can be sorted by abundance, population trend, altitude and number of years of available data. By clicking on the trend box for any of the transects, you can also access the Species by transect datasheet.]

[Change sheet]

[Characteristics]

Família: Pieridae
[BMS code]: piepra
[IUCN Status in Catalonia]:
Preocupació menor

[Illustrations by Richard Lewington from Tolman & Lewington (1997) Butterflies of Britain and Europe, translated and published in Spanish by Lynx Edicions.] [Plate] 7, 35.

Catalan Butterfly Monitoring Scheme 2024
[Web map] | [Notes legals] | Créditos

[Project in agreement with:]

En colaboración con: