Sustainability Analysis of Tuna (Thunnus sp.) Fishery in Sendang Biru, Malang Regency

Tuna capture fisheries have a very important value and meaning for the socio-economic life of coastal communities, either directly or indirectly. On the other hand, the catch of tuna has decreased from an ecological aspect based on the exploited status, production, and the value of CpUE (Cath per Unit Effort), the length of the fish caught, and the amount. The research objective was to analyze the sustainability status of tuna fisheries from 3 dimensions. This study was a survey of 76 respondents in the Sendang Biru Malang districts. The method used the Multi-Dimensional Scaling (MDS) analysis using the software Rapfish (Rapid Appraisal for Fisheries). The results showed that the sustainability status to be seen from 3 dimensions, ecology, economic, and social, which showed that the level of sustainability of tuna fishery from the economic and social dimensions was enough sustainable. For the ecological dimensions, it shows less sustainability. In general, the level of sustainability of tuna fishery in the Sendang Biru is enough sustainable. There need activities related to environmental conservation to increase ecological sustainability. In addition, it is necessary to hold counseling and training on aquatic ecosystems so that they are utilized in the short term and in the long term.

Surface habitat modification through industrial tuna fishery practices

Natural floating objects (FOBs) have always been a major component of the habitat of pelagic species. Since the 1990s, the number of FOBs in the open ocean has increased greatly as a result of the introduction of fish aggregating devices (FADs) by the industrial tropical tuna purse seine vessels. These changes, and their potential impacts on the species that associate with FOBs, remain poorly understood. Using fisheries observer data, data from satellite-linked tracking buoys attached to FOBs and Lagrangian simulations, this study quantifies the temporal changes in the density and spatial distribution of FOBs due to the use of FADs in the Indian Ocean (IO) between 2006 and 2018. From 2012 to 2018, the entire western IO is impacted, with FADs representing more than 85% of the overall FOBs, natural FOBs less than 10%, and objects originating from pollution 5%. Results also suggest that both FADs and natural FOBs densities are lower in the eastern IO, but this initial investigation highlights the need for further studies. Our study confirms that FADs have greatly modified the density and spatial distribution of FOBs, which highlights the need to investigate potential consequences on the ecology of associated species.

STUDY ON MARKET PROCESS OF TUNA POLE-AND-LINE FISHERY IN EASTERN INDONESIA: A STUDY CASE IN SORONG, PAPUA BARAT PROVINCE

This research is a study of the way the small-scale pole-and-line tuna fishery in Sorong, Indonesia by examining official records of supply chains; key informant and fishers’ perceptions of marketing; and personal observations of landings and selling. The main finding of the study is that the pole-and-line fishers in Sorong have made strenuous efforts to escape the constrictions of middlemen by direct selling to processors.

A Proposed Integrated Supply Chain Management Framework for Tuna Fishery in Palabuhanratu

Tuna production potential of Palabuhanratu, Sukabumi District, is very high but the fishery is not supported by a good supply chain. In this location, there are two existing chains namely fresh and derivative-product chains; both are influenced significantly by seasonal variables. This research aims to analyze integrated supply chain management for tuna fishery in Palabuhanratu. Data for this research comprises both primary and secondary data. Primary data were collected through interviews with 20 respondents representing fishermen, 10 representing wholesalers, 10 representing retailers, 10 representing consumers, all of which were drawn from following the snowball sampling technique. Meanwhile, secondary data were time series tuna production statistics made available from the printed report of the Sukabumi District Fishery Office. This research employed the factor analysis and fisheries supply chain management model as the main methodological tools. The result showed that among others, the most influential factors for tuna demand in the research location are price of fish, tuna product diversity, and distribution of tuna catch. On the other hand, in the supply side the most influential factors are fishing season and tuna species. It was identified from the research that with regard to the existing chains, this research identified that there are variants of both the fresh fish and derivative product chains, each of which have some particular drawbacks related to influential factors observed in the other part of this research. It is worth noting here that variants of the fresh tuna chain are: (i) fishers, auction place, wholesalers, retailers, consumers, (ii) fishers, auction place, consumers, (iii) fishers, consumers. Variants of the derivative-product chain are: (i) fishers, auction place, wholesalers, processors, processed fish wholesalers, processed fish retailers, consumers, (ii) fishers, auction place, processors, processed fish wholesalers, processed fish retailers, consumers, (iii) fishers, auction place, processors, processed fish retailers, consumers. In general, this research suggests that improvement should be made through the introduction of an integrative approach aiming to incorporate tools necessary to mitigate negative influential factors and to take advantage the positive ones.

Comparative analysis of incidental dolphin mortality, during fishing trips of the Mexican purse seine tuna fishery in the Eastern Pacific Ocean recorded by two scientific observer programs

Scientific observer programs in fisheries are being deployed worldwide in order to obtain robust data for fishery studies, and in relation to its interaction with target and bycatch species. A comparison between two observer programs in Mexican purse seine tuna fishery in the Eastern Pacific ocean is performed considering the incidental mortality per trip as a metric recorded by both observers programs from 1999 to 2016. A Bayesian t-test approximation was used for the comparison between the two methods since, due to its probabilistic nature reduces uncertainty. The analysis showed a very low probability of differences for the estimated bycatch rate between both programs.