Estimation of maximum sustainable yield of <i>Gelidium robustum</i> seaweed fishery in Mexico

Valdez, María Margarita Casas; Belda, Daniel Lluch; Garcia, Sofía Ortega; Vázquez, Sergio Hernández; Servière‐Zaragoza, Elisa; Sanchez, D. Lora

doi:10.1017/s0025315405011689

Cited by 5 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The harvest has maintained relatively stable levels, at around 1000 metric tons of dry weight annually for the most important species, Gelidium sp , since the 1980s [ 78 ]. According to the estimates from a harvest in a period between 1985 and 1997, the resource was not overexploited [ 79 ]. However, the effects of climate change are likely to affect available biomass over a longer-term horizon either directly or through changes in community structure [ 79 , 80 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Sustaining small-scale fisheries through a nation-wide Territorial Use Rights in Fisheries system

Aceves-Bueno,

Nenadovic,

Dove

et al. 2023

PLoS ONE

View full text Add to dashboard Cite

Territorial Use rights in Fisheries (TURFs) are used around the world to manage small-scale fisheries and they’ve shown varying levels of success. Our understanding of what leads to different performance levels is limited due to several reasons. Firstly, these systems are often present in areas with low monitoring capacity where data is scarce. Secondly, past research has centered on the analysis of successful cases, with little attention paid to entire systems. Thirdly, research has been ahistorical, disconnected from the development process of TURF systems. Fourthly, TURFs are often viewed as homogenous ignoring the socio-ecological conditions under which they develop. To address these gaps, the study focuses on Mexico as a case study and context. The research first presents a historical overview of the development of TURF systems in Mexico, including the institutional and legal frameworks that have shaped their evolution. The paper then presents a TURF database that maps all TURF systems in Mexico, including their geographical locations and characteristics. In addition, the study presents case studies based on identified archetypes that showcase the diversity of TURF systems in Mexico, highlighting the different types of systems and the challenges they face. By presenting a comprehensive map of all TURF systems in Mexico, this research paper aims to make an important addition to the case studies in the global literature on TURF systems and provide a valuable resource for marine resource management policymakers, researchers, and practitioners.

show abstract

Section: Resultsmentioning

confidence: 99%

“…According to the estimates from a harvest in a period between 1985 and 1997, the resource was not overexploited [ 79 ]. However, the effects of climate change are likely to affect available biomass over a longer-term horizon either directly or through changes in community structure [ 79 , 80 ].…”

Section: Resultsmentioning

confidence: 99%

Sustaining small-scale fisheries through a nation-wide Territorial Use Rights in Fisheries system

Aceves-Bueno,

Nenadovic,

Dove

et al. 2023

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…The results have shown that the resource is not overexploited (Casas-Valdez et al, 2005). In this study we tried to use these surplus models for the data of Macrocystis, but the fit was not satisfactory.…”

Section: Discussionmentioning

confidence: 95%

Temporal Changes in the Harvest of the Brown Algae Macrocystis pyrifera (Giant Kelp) along the Mexican Pacific Coast

Casas-Valdéz¹,

Servière‐Zaragoza²,

Lluch-Belda³

2011

Biomass - Detection, Production and Usage

View full text Add to dashboard Cite

“…Relationships between the CPUE and environmental factors were established (Casas-Valdez et al 2001) allowing the forecast of standing stocks and their variation with the fluctuating environment (El Niño events). As well, estimations of maximum sustainable yields have suggested that the resource has not been over-exploited (Casas-Valdez and Lluch-Belda, 2005). Sound scientific inputs are needed to implement adequate management practices.…”

Section: Discussionmentioning

confidence: 99%

Global shortage of technical agars: back to basics (resource management)

Santos

Melo

2018

J Appl Phycol

View full text Add to dashboard Cite

Bacteriological and technical agars are in short supply with potential consequences for research, public health, and clinical labs around the world. To diagnose bottlenecks and sustainability problems that may be putting the industry at risk, we analyzed the available time series for the global landings of Gelidium, the most important raw materials for the industry. Data on the harvest of Gelidium spp. have been reported since1912, when Japan was the only producer. After World War II the diversification of harvested species and producing countries resulted in a strong increase in global landings. Maximum harvest yields of almost 60,000 t year−1 in the 1960s were sustained until the 1980s, after which landings decreased continuously to the present. In the 2010s, a reduction in the global production to about 25,000 t year−1 was observed, which was lower than the yields of the 1950s. Landings by important producers such as Japan, Korea, Spain, and Portugal have collapsed. This is the ultimate cause of the present shortage of bacteriological and technical agars. However, an important factor at play is the concentration of the global landings of Gelidium in Morocco, as its relative contribution increased from 23% in the 1960s to the present 82%. Two specific bottlenecks were identified: restrictive export quotas of unprocessed Gelidium in favor of the national agar industry and resource management regulations that were apparently not enforced resulting in over-harvesting and resource decline. The global industry may well be dependent on resource management basics. Simple harvest statistics must be gathered such as the harvest effort and the variation of harvest yields along the harvest season. We discuss how this information is fundamental to manage the resource. The available harvest statistics are generally poor and limited and vary significantly among different sources of data. Probable confusions between dry and wet weight reporting and poor discrimination of the species harvested need to be resolved.

show abstract

Estimation of maximum sustainable yield of Gelidium robustum seaweed fishery in Mexico

Cited by 5 publications

References 3 publications

Sustaining small-scale fisheries through a nation-wide Territorial Use Rights in Fisheries system

Sustaining small-scale fisheries through a nation-wide Territorial Use Rights in Fisheries system

Temporal Changes in the Harvest of the Brown Algae Macrocystis pyrifera (Giant Kelp) along the Mexican Pacific Coast

Global shortage of technical agars: back to basics (resource management)

Contact Info

Product

Resources

About