<big>''[[Caulerpa lentillifera]]'' J. Agardh</big>
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:Protologue: Mus. Senckenb. 2: 173 (1837).
== Synonyms ==
*''Caulerpa kilneri'' J. Agardh (1873), *''C. longistipitata'' (Weber Bosse) Sved. (1906).
== Vernacular names ==
== Description ==
*Plant stoloniferous, up to 10 cm tall; stolons branched, terete in cross-section, 1-1.5(-2) mm in diameter. *Descending branches (pillars) with tufts of rhizoids arising at irregular intervals from ventral side of stolons. *Fronds rather densely set, without stalks or with very short, naked lower section on the upright axis, usually less than 5 mm long and 1-2 mm in diameter, consisting of an irregularly branched or more often unbranched terete axis, completely and usually densely covered by subspherical or more or less clavate branchlets, 1-3 mm in diameter, placed on 5-8 longitudinal rows or more irregularly and imbricately placed, always supported by clearly constricted pedicels. *Thalli holocarpic when fertile.
== Growth and development ==
Sexual reproduction of ''C. lentillifera'' is believed to be similar to that of other ''Caulerpa'' , but has not yet been observed in South-East Asia. Sexual reproduction of these most probably holocarpic plants would result in empty outer walls that would disintegrate quickly.
== Ecology ==
== Propagation and planting ==
''C. lentillifera'' is cultivated in the Philippines in ponds and open lagoons which are protected from strong waves. Initial stocking rate is 100 g/m<sup>2</sup>or 1000 kg/ha; the seedstock is planted on the pond bottom uniformly by burying one end of a handful of seedstock at approximately one metre intervals, using string as a guide. Broadcasting may also be used to seed the ponds. However, the seedstock is then not anchored to the bottom and may easily be carried away by waves, becoming concentrated in one part of the pond which results in patchy or uneven growth. Planting is therefore the more efficient method. When cultivated in open lagoons, the site should be shallow (0.3-0.5 m at lowest tide) with free-flowing water and the substrate must be muddy-loam. The area must first be cleared of seagrasses and other marine organisms. Branches are half-buried into the muddy substrate at 0.5 m intervals. In the wild ''C. lentillifera'' is highly seasonal, with peak production during the sunny dry months of the year. All year round production is, however, possible if a flow-through system is installed in the culture ponds to fully control their salinity level during the rainy season. In the ponds multiplication mainly takes place by fragmentation of thalli. Cage cultivation of ''C. lentillifera'' is undertaken in Okinawa (Japan). Multistage cylindrical cages are used for cultivation in the tropical waters of Yamaha Bay. Small bundles of thalli are tied to the middle of the floor of each stage of the cages, which are then hung in the sea. If the cultivation ground is too shallow for the cages to hang, mosquito nets with bundles of cut pieces tied at intervals of 0.5-1 m are laid on the bottom parallel to the currents.
The maintenance of good water quality, which can only be achieved through proper pond management, is dependent on the ponds being appropriately designed and constructed. The following are factors considered in the selection of farm sites: proximity to a source of unpolluted seawater supply, far from freshwater sources such as rivers and creeks, the level of the pond being at, or just a little above the low-tide level, protected from the direct effects of wind-driven waves which can easily erode and destroy the dikes; the substrate should be muddy-loam; very soft and deep muddy bottoms should be avoided; abandoned or non-productive fish ponds fulfilling the above criteria are preferred after some modifications. The pond should be divided into 0.5-1 ha areas. The smaller units should be laid out in such a way that a "flow-through system" can easily be incorporated. Newly built ponds are usually acidic and require the addition of hydrated lime while old ponds usually require 0.5-1 t agricultural lime per hectare each year. The ponds are first drained to a depth of 0.3 m to facilitate planting.
== Harvesting ==
Harvesting of ''C. lentillifera'' may be undertaken two months (or more) after planting, depending on the growth rate of the crop. Harvesting takes place when the bottom of the pond is uniformly covered with ''Caulerpa'' . About 20-25% of the original crop should be left more or less uniformly spread or spaced on the pond bottom to serve as seedstock for the next crop. Depending on the amount of seedstock left and the growth rate of the plants, the succeeding harvests may be reaped at intervals of about two weeks or longer. Harvesting is done by uprooting the plants from the mud. These are placed in a wooden dugout or banca and are washed thoroughly in clean seawater to remove the mud, silt and other dirt. Partial harvesting is also practised in open lagoon cultivation so that enough stock is left for the next crop.
== Yield ==
Harvested ''C. lentillifera'' is placed in baskets or clean polythene sheets for sorting to remove any remaining dirt and other material (epiphytes), washed thoroughly in clean seawater and all excess water is allowed to drip off prior to packing.
In Japan, fresh fronds of ''C. lentillifera'' are packed in 100-200 g packages. These will stay fresh for about 7 days if kept chilled and moist. If refrigerated (5-10°C10 °C) in bottles or tubular polythene bags with seawater it will remain fresh for about 3 months. Brine-cured or salted and dehydrated samples, when soaked in freshwater, swell rapidly and recover their original shape within several minutes. Therefore, when distributed in ready-to-eat packets, these seaweeds and their dressing should be packed separately.
== Prospects ==
== Literature ==
* Pérez, R., Kaas, R., Campello, F., Arbaut, S. & Barbaroux, O. (Editors), 1992. La culture des algues marines dans le monde [The culture of marine algae in the world]. Infremer, Plouzane, France. 614 pp.
* Trono Jr, G.C. & Ganzon-Fortes, E.T., 1988. The methodologies and economics of Caulerpa pond culture. In: Trono Jr, G.C. & Ganzon-Fortes, E.T. (Editors): Philippine seaweeds. Annex 6. National Book Store, Metro Manilla, The Philippines. pp. 311-321.
* Trono Jr, G.C., & Toma, T., 1993. Cultivation of the green alga, Caulerpa lentillifera. In: Ohno, M. & Critchley, A.T. (Editors): Seaweed cultivation and marine ranching. Japan International Cooperation Agency, Yokosuka, Japan. pp. 17-23.
*see also the [[Caulerpa (PROSEA)|genus page]]
== Authors ==
*G.C. Trono Jr
[[Category:Algae (PROSEA)]]
[[Category:PROSEA]]