Galaxias maculatus occurrence data in marine and freshwater environments in rivers of southern Chile

In the present study, we assessed ecological and historical factors
(Gondwanan vicariance, marine dispersion) and potential dispersion
(niche-tracking) that explain distribution of Galaxias maculatus in the
Southern Hemisphere based on occurrences available in the Global
Biodiversity Information Facility (GBIF; period 1980 to 2022) and
ichthyological sampling in five river systems in southern Chile between
March and November 2019. Ocurrence data extracted from GBIF are available
at http://www.gbif.org and additional ichthyological sampling data that
were used are provided here. Data provided here are based on sampling of
Galaxias maculatus at 12 sites in five river systems in southern Chile
during March, May, August, and November 2019. Sampling sites were selected
to cover a continuous river gradient, including (whenever possible) the
lower, middle, and upper sections of each river system. Fish were captured
using beach seines (5 m long, 1.5 m high, and 10 mm stretched mesh) in
shoreline habitats of each evaluated river system.

本研究以全球生物多样性信息设施（Global Biodiversity Information Facility, GBIF；1980年至2022年）的物种出现记录数据，以及2019年3月至11月间在智利南部5个河流水系开展的鱼类学采样数据为基础，评估了解释斑点南乳鱼（Galaxias maculatus）在南半球分布格局的生态与历史因子（冈瓦纳隔离事件、海洋扩散）及潜在扩散机制（生态位追踪）。从GBIF提取的物种记录数据可于http://www.gbif.org 获取，本研究使用的补充鱼类学采样数据则随本文一并提供。本次随文发布的数据，基于2019年3月、5月、8月及11月间，在智利南部5个河流水系的12个采样点开展的斑点南乳鱼采样工作。采样点的布设覆盖完整的河流梯度，尽可能涵盖每个河流水系的下游、中游与上游区段。研究人员于各调研河流水系的岸生境中，使用沿岸曳网（长5 m、高1.5 m、拉伸网目尺寸10 mm）完成鱼类样本采集。