Taking stock after six years – the first results of an ongoing project to establish new populations of a regionally endangered grasshopper
Data files
Aug 29, 2025 version files 21.11 KB
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Arcyptera_fusca_population_data.xlsx
9.50 KB
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Arcyptera_fusca_translocation_data.xlsx
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README.md
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Abstract
This data represents the sum of specimens translocated in each occasion between 2018 and 2024 from natural source populations of the large banded grasshopper (Arcyptera fusca, Acrididae, Orthoptera) in Bükk and Börzsöny Mountains, NE Hungary, to altogether 5 recipient sites in the same mountain ranges, and the estimation of the newly established populations during a subsequent monitoring year by year in each recipient site. This study was conducted in a species conservation project in Hungary, where the main aim was to establish new populations of the regionally endangered large bandad grasshopper there. A. fusca individuals were translocated to five mountain meadows from nearby source populations, in some cases with repeated translocations of smaller numbers (30-50 individuals) between 2018 and 2024. The size of the new populations was estimated yearly by the transect method. We estimated the population size on each occasion by multiplying the number of individuals detected in the transects by the ratio of the total area of habitat to the transect area. By 2024, a new, growing population will exist in Bükk and another one in Börzsöny Mts. These are considered successful translocations. At two other sites, the success is questionable, as there is a small population at each, but it is not yet possible to determine a trend. At the fifth site, the first translocation attempt in 2023 was unsuccessful and was repeated in 2024 with a larger number of individuals.
Dataset DOI: 10.5061/dryad.c2fqz61pg
Description of the data and file structure
This data represents the sum of specimens translocated in each occasion between 2018 and 2024 from natural source populations of the large banded grasshopper (Arcyptera fusca, Acrididae, Orthoptera) in Bükk and Börzsöny Mountains, NE Hungary, to altogether five recipient sites in the same mountain ranges, and the estimation of the newly established populations during a subsequent monitoring year by year in each recipient site.
Files and variables
File: Arcyptera_fusca_population_data.xlsx
Description: The size of the newly established Arcyptera fusca populations was estimated after the first translocation's year yearly by transect method. We estimated the population size on each occasion by multiplying the number of individuals detected in the transects by the ratio of the total area of suitable habitat to the transect area. Missing information represented as n.a.
Variables
- year: The year in which population estimation took place in the given site.
- individuals detected in the transect: The number of individuals detected in the stripe transect in given site.
- area (square metres) covered by transect: The total area covered by the stripe transect in the given year in the given recipient site.
- extension of suitable habitats (square metres): The extension of the suitable habitats in the given site.
- population size estimated: Population size estimation in the given year in the given site calculated by multiplying the number of individuals detected in the transect by the ratio of the total area of suitable habitat to the area covered by the transect.
File: Arcyptera_fusca_translocation_data.xlsx
Description: Arcyptera fusca individuals were translocated to five mountain meadows from nearby source populations, in some cases with repeated translocations of smaller numbers between 2018 and 2024. Number of individuals (males and females separated) translocated in each year are given in the table.
Variables
- year: The year(s) in which translocation took place at the given site.
- males: The number of male individuals translocated in a given year in a given site.
- females: The number of female individuals translocated in a given year in a given site.