Estimating Biomass from the Cover of Gelidiella acerosa along the Coasts of Eastern Philippines

Rollon, Rene N.; Samson, Maricar S.; Roleda, Michael Y.; Arano, Karen G.; Vergara, Mark Windell B.; Licuanan, Wilfredo Y.

doi:10.1515/bot.2003.051

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…The annual harvests of G. acerosa in the Gulf of Mannar in 2003–2012 yielded 1100–1500 t resulting in 50–90 t of agar (Ganesan et al 2014). G. acerosa is also abundant in areas of the Philippines (Rollon et al 2003) and Thailand (Fujimoto et al 2014), but we were not able to gather any information on a putative harvest. As well, relevant amounts of G. latifolium have been harvested in Indonesia (Soegiarto 1990), picked by hand either at low tide or by snorkeling in shallow waters, but we did not find any time series data on annual landings.…”

Section: Resultsmentioning

confidence: 92%

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

Santos

Melo

2018

J Appl Phycol

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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.

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Section: Resultsmentioning

confidence: 92%

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

Santos

Melo

2018

J Appl Phycol

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“…Initial documentation of seaweeds in southeastern Sorsogon was stimulated in part by an interest in its potentially exploitable resources (Kraft 1969;Taylor 1977), with some progress being made to understand the seaweed composition and diversity of the area (De Smedt et al 2001;Kraft et al 1999;Rollon et al 2003;Trono 1972Trono , 1975Trono , 1976. Although most of the new species and records from eastern Sorsogon to date have centered on the Rhodophyta, particularly in Bulusan, the entire region is additionally well endowed with green and brown algae.…”

Section: Introductionmentioning

confidence: 99%

The Ulvophyceae (Chlorophyta) of eastern Sorsogon, Philippines, including Halimeda magnicuneata sp. nov. (Bryopsidales)

et al. 2020

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The marine algal flora of eastern Sorsogon has been intensively collected and is generally considered as the richest in the Philippines. A trend of species records in the area has been dominated by rhodophytes (red algae) with significantly fewer similar studies for other algal groups (green and brown algae). In this study we present an updated catalogue of the green seaweeds (Ulvophyceae) of eastern Sorsogon. A checklist, including notes on taxonomy, is given of the 103 species. Twenty-six species are newly recorded locally of which five represent new records for the Philippines: Avrainvillea amadelpha, Caulerpa buginensis, an unidentified Caulerpa species, Codium cf. latum, and one taxon new to science. The new species is described as Halimeda magnicuneata Verbruggen et Dumilag based on morpho-anatomy and DNA sequence data. The number of ulvophycean species recorded in eastern Sorsogon is found to be the highest in the Philippines. This may be a result of the high collection effort in the region, as well as eastern Sorsogon’s diverse habitats providing favourable conditions for a wide range of seaweed species.

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The influence of contrasting life history traits and oceanic processes on genetic structuring of rabbitfish populations Siganus argenteus and Siganus fuscescens along the eastern Philippine coasts

Magsino

Juinio‐Meñez

2008

Mar Biol

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Estimating Biomass from the Cover of Gelidiella acerosa along the Coasts of Eastern Philippines

Cited by 6 publications

References 4 publications

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

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

The Ulvophyceae (Chlorophyta) of eastern Sorsogon, Philippines, including Halimeda magnicuneata sp. nov. (Bryopsidales)

The influence of contrasting life history traits and oceanic processes on genetic structuring of rabbitfish populations Siganus argenteus and Siganus fuscescens along the eastern Philippine coasts

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