Johnius Fish Occurrence Records from Central Western Taiwan, 2009-2020

From 2009 to 2020, 133 occurrence records comprising 2,566 individual fish specimens were collected via trawling in Miaoli, Changhwa, and Yunlin counties. The dataset, created by Norhafiz Hanafi of National Sun Yat-sen University, documents six Johnius species and is published in the Taiwan Fish Database and GBIF. It serves as a foundation for understanding species ecology and biogeography influenced by ocean currents and the Changyun Rise topography.

Use Cases

• Modeling species distribution and habitat suitability based on occurrence records and spatial coordinates.
• Analyzing population structure and abundance of Johnius species based on individual counts and body weight measurements.
• Studying the biogeographic influence of the Changyun Rise and ocean currents on fish fauna based on the described spatial-temporal patterns.

Strengths

• Contains 133 occurrence records with 2,566 individual specimens, providing a substantive sample size.
• Covers a 12-year time span (2009-2020) from 62 sampling events, offering longitudinal data.
• Includes six distinct Johnius species, allowing for comparative analysis within the genus.
• Data is integrated and published in authoritative biodiversity platforms (Taiwan Fish Database and GBIF).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count for the underlying data table is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

Taiwan Fish Database (http://fishdb.sinica.edu.tw) and GBIF (https://www.gbif.org).

Collection Method

Fish specimens collected by trawling and brought to a lab for identification, counting, and body weight measurement.

Time Range

2009-2020

Geography

Central-western coastal waters of Taiwan, specifically Miaoli, Changhwa, and Yunlin counties.