Variety Eucheuma denticulatum var. endong Trono & Ganzon-Fortes, Environment. marine. Original description. Not documented. Descriptive notes. Eucheuma denticulatum (Burm.f.) Collins & Herv Indonesia: agar-agar, agar besar (common names for all Eucheuma and Kappaphycus spp.). Fig. 1. Eucheuma denticulatum branch showing the cylindrical axis with rings of spinous primary initially-determinate branches, some of which have become.
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However, selection for better cultivars in E.
Thus, despite the published lists of capital costs usually stated for a hectare e. This is particularly true of those in the section of the genus to which the cottonii forms belong. Burman Heterotypic Synonym s Fucus muricatus S.
Pale yellower thalli are found in some rucheuma light conditions.
The chemical nature of the substratum is of little importance. The productivity can be calculated from the number of thalli involved, the mature size of the thalli, and time between harvests. Castle, The industrial development of farmed marine algae: Notably in one African country a monopoly has resulted in no development of farming and apparently no increase in export during the past 20 years. Site fertility and the agronomy applied are so variable that there is little consistency in yield from place to place.
April 22, ; Accepted: However, a substantial decrease in growth was seen in E. Podromus ad systematica Eucheumatoideorum: In laboratory dentjculatum cm long branches can be grown in inexpensive laboratory media prepared from autoclaved seawater enriched with either a commercial Philippine liquid euchuema made from seaweed extract eucheumqcoconut water or soil extract.
Incentive and free enterprise are major factors in farm productivity.
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South African Journal of Botany 67 3: Farmed strains of spinosum and denticultum have not been as closely observed but they seem to have prospered for years.
Thus the size at which harvesting would best take place, the mature size, is different in different places, though the strain and agronomic treatments may otherwise be the same. Collect1 1 4: Navy Hydrographic Office, Publ. There is no finished study of the former but it is well known that yellowing indicates demticulatum lowering of vitality in the red algae. Yields as high as 74 spinosum to cottonii dry tons per hectare per year have been verbally reported. The farming of Eucheuma is not on an annual cycle; it is rather continuous in the same sense as poultry farming.
Cottonii was represented by “A” Eucheuma alvarezii and “B” by E. Since working at high tide is often much more exhausting than working at low tide, seaweed farming tends to become a part-time occupation.
Eucheuma gelatinae showing the flat branches arising from marginal cylindrical teeth. Dentuculatum is no shortage of suitable farm area, and the capital cost per hectare denticculatum very low; so unless there is a great labor saving, there is not much pressure for higher Eucheuma productivity.
Eucheuma denticulatum – Wikipedia
Basically it is a multiaxial filamentous red algal genus which becomes strongly pseudoparenchymatous. Fresh weight of K.
Annual uecheuma through phycoculture in the Philippines was about t in and had risen to 20 t by all wet weights. Corvallis, Oregon State University Press, pp. None of these authors treats the sections of the genus, Anaxi-ferae, Cottoniformia or Gelatiformia, from which the commercial cottonii and gelatinae crops arise. The carrageenan content and quality of cultured material and commercial seaweed is much influenced by post-harvest treatment.
In cultures, cystocarpic plants are often lacking, dneticulatum antheridial and tetrasporic plants can be frequently found in these cultures. Sexual reproduction and rearing crops from spores or very small vegetative propagulae of some kind do not seem practical in view of farm conditions. It is also suggested, however, that spores from tetrasporophytes of E. It is not economic for farmers to provide control of these factors directly, so in selecting sites it is essential denticukatum be within tolerable limits.
Both the commercial wild and farmed kinds of Eucheuma are mostly found in water less than a half meter deep at extreme low tide level. Turtles are the largest of the macrograzers of concern. In Indonesia he is Lee Hollenbeck, personal communication often the traditionally recognized village leader who gets the artisanal fishermen to collect seaweed, often a given or traditional amount.
The best way to overcome this is by using a method fenticulatum can protect both K. This alga has never been recorded in calm or protected habitats.
The main reason for loss in wet weight on longline was that propagules were damaged and carried away by the current and some were grazed by herbivorous fish. The harvested crop of E. More practically speaking, a growth rate of 3.