1 Aim

This report is automatically generated in the last step of Peskas’ data pipeline and summarises the main statistics and insights related to small-scale fisheries (SSF) in Timor-Leste. The report gives an overview of the Peskas’ fleet and provide aggregated statistics and time series of the total revenue and total catch. The report provide also information on the catch composition, highlighting the most important fish groups in terms of overall stock.

2 Data distribution

3 Fishery profile

This section contains information of the Timor-Leste SSF’ fleet and the main characteristics of the fishing trips. The information is based on the data collected during the Peskas’ surveys.

3.1 Boats information

3.2 Gear used and boats type

4 Fishery indicators

This section contains information on the main fishery indicators, including the number of trips, the catch volume, the fishing effort and the fishing revenue at national and municipal level. The information is based on the data collected during the Peskas’ surveys.

4.1 Catch per unit effort

Catch per unit effort (CPUE) is a measure of the productivity of a fishery. It is calculated as the total catch divided by the total fishing effort. The fishing effort is expressed as the number of fishers multiplied by the duration of the fishing trip. The CPUE is expressed in kg per fisher per hour.

4.2 Number of trips

4.3 Catch volume National

4.3.1 Catch volume Municipal

4.4 Fishing revenue National

4.4.1 Fishing revenue Municipal

4.5 Market value National

4.5.1 Market value Municipal

5 Catch usage

This section contains information on the final catch usage, it is recorded as deemed for the market (sell), for self-sufficiency (food) or for both purposes.

6 Catch usage by municipality

7 Catch composition

this section contains information on the catch composition, highlighting the most important fish groups in terms of overall stock. The information is based on the data collected during the Peskas’ surveys.



7.1 Catch composition by municipality

8 Gender composition

This section provides details on the gender breakdown and gender-specific activities in Timor-Leste’s small-scale fisheries (SSF).

9 Boat tracking

Boat movements are tracked by Pelagic Data System tracking system, and a proprietary algorithm is used to determine when a trip occurs. Tracks are recorded by GPS devices mounted on the boats. The heatmap refer to the boats’ movements tracked along the Timor coast with a grid resolution of 10 x 10 meters. The tracks are filtered for outliers and some potential algorithm errors. Specifically, we do not take into account geo-referenced tracks characterized by large anomalies in the quality of the tracking signal, the speed of the boats, and the distance and time travelled.

10 Nutritional properties

The nutritional values for each catch were obtained by integrating the weight estimates for each fish-group retrieved from FishBase with modelled concentrations of seven nutrients (Hicks et al. 2019) foundable in FishBase Nutrient Research Tool and in the public repository associated to the paper on GitHub. In the plots below we refer to the Recommended Daily Intake of a woman between 15 and 49 years old (Trumbo et al. 2002) to estimate the overall nutritional value.

11 About Peskas™

Peskas is the official fisheries national monitoring system of Timor-Leste and represents one of the most sophisticated data collection systems for small-scale fisheries in the world.

Peskas’ platform collects real-time information directly from fishermen’s activity via a system of digital surveys developed in KoBo toolbox. In addition, Peskas uses the technology provided by Pelagic Data System to record vessel movements via solar-powered tracking devices).

The data and the information collected is subjected to an elaborate processing and cleaning through an open-source code pipeline on GitHub, and provide important data in the hands of fisheries officers, researchers and local stakeholders and enables them to better understand the contribution of fish and fisheries to local livelihoods and food security.

Information about the process and user-centred design of the Peskas pipeline and initial analytics, and its application in fisheries research & management can be found in the following publications:

References

Hicks, Christina C., Philippa J. Cohen, Nicholas A. J. Graham, Kirsty L. Nash, Edward H. Allison, Coralie D’Lima, David J. Mills, et al. 2019. “Harnessing Global Fisheries to Tackle Micronutrient Deficiencies.” Nature 574 (7776): 95–98. https://doi.org/10.1038/s41586-019-1592-6.
Tilley, Alexander, Joctan Dos Reis Lopes, and Shaun P Wilkinson. 2020. “PeskAAS: A Near-Real-Time, Open-Source Monitoring and Analytics System for Small-Scale Fisheries.” PloS One 15 (11): e0234760.
Tilley, Alexander, Shaun P Wilkinson, Jeppe Kolding, Juliana López-Angarita, Mario Pereira, and David J Mills. 2019. “Nearshore Fish Aggregating Devices Show Positive Outcomes for Sustainable Fisheries Development in Timor-Leste.” Frontiers in Marine Science 6: 487.
Tilley, A, and MB Roscher. 2020. “Information and Communication Technologies for Small-Scale Fisheries (ICT4SSF)-a Handbook for Fisheries Stakeholders.”
Trumbo, Paula, Sandra Schlicker, Allison A. Yates, and Mary Poos. 2002. “Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein and Amino Acids.” Journal of the American Dietetic Association 102 (11): 1621–30. https://doi.org/10.1016/s0002-8223(02)90346-9.