Chilean fishing law, maximum sustainable yield, and the stock recruitment relationship

Wiff, Rodrigo; Quiróz, Juan Carlos; Neira, Sergio Peña; Gacitúa, Santiago; Barrientos, Mauricio A.

doi:10.3856/vol44-issue2-fulltext-19

Cited by 16 publications

(10 citation statements)

References 22 publications

(30 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Likewise, reproduction is a key aspect to understand population resilience to fishing exploitation and conservation measures like season or zone closures. Chile's fisheries management is based on the concept of maximum sustainable yield (MSY) which almost exclusively depends on the steepness of the stockrecruitment relationship as a resilience metric (Mangel et al, 2013, Wiff et al, 2016. Wiff et al (2018) proposed a rapid method to estimate steepness in Chilean fisheries (and thus MSY) using the ratio of L F50 and L ∞ .…”

Section: Discussionmentioning

confidence: 99%

Reproductive biology and population structure of white warehou Seriolella caerulea and silver warehou Seriolella punctata in the austral zone off Chile

Liu

Flores

Quiróz

et al. 2019

Journal of Fish Biology

Self Cite

View full text Add to dashboard Cite

Using an extensive database compiled by scientific observers aboard commercial fishing operations between 1984 and 2014, we describe the maturity and size structures of white warehou Seriolella caerulea and silver warehou Seriolella punctata from by‐catch of the trawling industrial fisheries operating in the austral zone off Chile. Macroscopic maturity stages and gonadosomatic (IGS) index show mature females throughout the year and a pronounced spawning period in both austral autumn and winter seasons, with an IGS peak in July for S. punctata and August for S. caerulea. Reproductive patterns in both species show an extended spawning season (July to September) across the area between 43 and 47° S. Length–mass relationships showed significant differences between sexes in both species, where females reach a larger size. Fork length at 50% maturity was 43.5 cm for S. caerulea and 37.2 cm for S. punctata. Female catch composition is dominated by adult fish (96% for S. caerulea and 86% for S. punctata). Currently, both species are exploited with no assessment and management‐decision framework. Therefore, information regarding reproductive biology and demographic traits becomes an important baseline to ensure adequate fisheries management for both species.

show abstract

Section: Discussionmentioning

confidence: 99%

Reproductive biology and population structure of white warehou Seriolella caerulea and silver warehou Seriolella punctata in the austral zone off Chile

Liu

Flores

Quiróz

et al. 2019

Journal of Fish Biology

Self Cite

View full text Add to dashboard Cite

show abstract

“…Fishing and Aquaculture General Act was amended in 2013 to incorporate the precautionary principle and ecosystem-based management approaches. In this framework, the maximum sustainable yield (MSY) turned out to be the cornerstone as a target reference point and became one of the most controversial issues in the discussion of FAGA at the time (Wiff, Quiroz, Neira, Gacitúa, & Barrientos, 2016).…”

Section: Stage 1: Rapid Increase In Wild Capturesmentioning

confidence: 99%

Is there a blue transition underway?

et al. 2019

View full text Add to dashboard Cite

In this study, we describe what we term a Blue Transition, defined as the passage from fish biomass reduction to recovery in exploited aquatic resources, enabled by aquaculture. A Blue Transition is a key component of emergent “blue” discourses which support that the expansion of aquaculture would relieve pressure on declining capture fisheries, thus contributing to global food security, particularly of the poorest populations. Based on global secondary data and the case of Chile, we explore the evidence of such claim and the implications of a Blue Transition for fisheries and aquaculture development. In 2012, worldwide aquaculture production surpassed wild captures; nevertheless, such turnaround would have not taken place without China's contribution. In Chile, this turnaround occurred in 2014, concurrently with the lowest industrial landings registered since the 1960s (1,227,359 tons). Chile's aquaculture is not relieving wild fisheries or satisfying food demands of the lower income population, in the country or elsewhere. Salmon, the main aquaculture product, is destined mainly to Japan, Russia and United States where, due to its high prices, it is consumed mostly by wealthy consumers. For the case at hand, evidence suggests that a blue transition may be underway but is going in the wrong direction: from what may have been sustainable fisheries management before the 1970s to the overexploited wild fisheries of today.

show abstract

“…Subsequently, in 1992, management authorities classified the pink cusk-eel fishery as a "fully exploited regime". This particular management regime is established in the Chilean General Law on Fishing and Aquaculture and, in general, empowers the management authority to allocate an annual quota (Wiff et al 2016). In this context, since 1992, this fishery has been managed on the basis of total allowable catches, which requires estimates of population abundance.…”

Section: Introductionmentioning

confidence: 99%

A multivariate statistical analysis to determine catch intention in the pink cusk-eel (<em>Genypterus blacodes</em>) longline fishery in southern Chile

Wiff

Gonzalez²,

Contreras

et al. 2020

Sci. Mar.

Self Cite

View full text Add to dashboard Cite

The definition of catch intention in multispecies fisheries is a key step toward building abundance indexes based on commercial fishing data. Previous analysis to determine catch intention in the pink cusk-eel (Genypterus blacodes) has been based on the idea that fishing tactics remain constant over time (static fishing tactics). We propose a statistical procedure to determine the catch intention of each haul in the industrial longline fisheries in southern Chile, where fishing tactics may vary over time. This procedure is based on principal component analysis and agglomerative hierarchical analysis of the catch composition, and relaxes the assumption of static fishing tactics by selecting a subset of data that is informative for fishing intention (target versus by-catch) every year. Sensitivity analyses were conducted to assess the robustness of variable fishing tactics on the nominal catch rates in pink cusk-eel. Targeted and by-catch time series of nominal catch rates showed a different trend, so determining the catch intention became relevant. Sensitivity analyses showed that trends in targeted catch rates are robust to the variations of fishing tactic per year. We recommend the use of variable fishing tactics for further use in effort standardization and stock assessment of the pink cusk-eel fishery in southern Chile.

show abstract

Chilean fishing law, maximum sustainable yield, and the stock recruitment relationship

Cited by 16 publications

References 22 publications

Reproductive biology and population structure of white warehou Seriolella caerulea and silver warehou Seriolella punctata in the austral zone off Chile

Reproductive biology and population structure of white warehou Seriolella caerulea and silver warehou Seriolella punctata in the austral zone off Chile

Is there a blue transition underway?

A multivariate statistical analysis to determine catch intention in the pink cusk-eel (<em>Genypterus blacodes</em>) longline fishery in southern Chile

Contact Info

Product

Resources

About