Skipjack tuna landings and ex-vessel prices at Tumumpa Port, North Sulawesi (2024-2025)

DATASET: Skipjack Tuna Landings at Tumumpa Coastal Fishing Port, North Sulawesi, Indonesia
PERIOD: January 2024 – December 2025 (24 months)
SPECIES: Skipjack tuna (Katsuwonus pelamis) only
SOURCE: Fisheries Port Information System (PIPP), Indonesia

CITATION:
Manoppo, VEN, [2026]. Skipjack tuna landings and ex-vessel prices at Tumumpa Coastal Fishing Port, North Sulawesi, Indonesia (January 2024–December 2025) [Data set]. Mendeley Data. https://doi.org/10.17632/vpnv9xz6k3.1

VARIABLES:
- year: Calendar year (2024 or 2025)
- month: Month name (January–December)
- month_numeric: Month number (1–12) for time-series analysis
- fishing_effort_trips: Number of purse seine vessel trips landing at port
- landed_volume_kg: Total skipjack catch weight in kilograms
- transaction_value_idr: Aggregate ex-vessel revenue in Indonesian Rupiah (IDR)
- ex_vessel_price_idr_per_kg: Derived unit price (transaction_value_idr / landed_volume_kg)
- notes: Data quality flags (e.g., "species_composition_shift" for June 2024 outlier)

DATA QUALITY:
- Species filtering: Only Katsuwonus pelamis included; mixed-species landings excluded
- Outlier validation: June 2024 price spike (IDR 45,823/kg) validated via Sailing Declarations (SPB) as a temporary shift to high-value species; retained in dataset but flagged for analysis exclusion
- Anonymization: All vessel-level identifiers removed per Indonesian Ministry of Marine Affairs Regulation No. 12/2021

ETHICAL COMPLIANCE:
- Data extracted under research permit No. [Nomor Izin] from North Sulawesi Marine and Fisheries Office
- Raw vessel-level data restricted due to confidentiality regulations; only aggregated port-level data shared
- Dataset supports reproducibility of findings reported in: "[Manuscript Title]", Fisheries Research (forthcoming)

CONTACT:
Victoria Manoppo
[Universitas Sam Ratulangi]
[e-mail]