The mass outdoor culture of macroscopic marine algae

Lapointe, Brian E.; Williams, L.D.; Goldman, Joel C.; Ryther, John H.

doi:10.1016/0044-8486(76)90015-6

Cited by 69 publications

(25 citation statements)

References 18 publications

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“…These observations agree with those of Lapointe et al (1976), where Hypnea musciformis responded to increased wastewater N supplies (140 mg/l) with dark brown, almost black pigmentation. All species also increased growth rates when provided with additional N, however, the bloom forming species, H. musciformis and Ulva lactuca, were more responsive in terms of building biomass than Acanthophora spicifera (another bloom forming species) and Dictyota acutiloba (non-bloom forming).…”

Section: Nutrient Effects On Growth Ratessupporting

confidence: 92%

Responses of bloom forming and non-bloom forming macroalgae to nutrient enrichment in Hawai‘i, USA

Dailer

Smith

2012

Harmful Algae

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Section: Nutrient Effects On Growth Ratessupporting

confidence: 92%

Responses of bloom forming and non-bloom forming macroalgae to nutrient enrichment in Hawai‘i, USA

Dailer

Smith

2012

Harmful Algae

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“…The natural light brown color changed to a yellow-brown color in tanks receiving tow levels of ammonia-N, and to a dark red-brown in the tanks receiving the highest ammonia-N concentrations. Lapointe et al (1976) observed similar changes in pigmentation in Hypnea and Gracilaria species in their mariculture system utilizing sewage-enriched seawater.…”

Section: Ammonia-n Uptake By Hypnea Musciforrnissupporting

confidence: 54%

“…Our experimental conditions may have induced, in the Hypnea rnusciforrnis that fragmented, an increased requirement for a trace metal or vitamins caused by using an ammonia rich, high light intensity, and high temperature environment. Lapointe et al (1976) observed fragmentation of H. rnusciforrnis in their tanks at the Harbor Branch Foundation (Florida, USA). They suggested that fragmentation was caused by high light intensity, rather than the high temperatures (above 28 ~ C) in their non-nutrient limited cultures.…”

Section: Fragmentation Of Hypnea Musciformismentioning

confidence: 99%

Ammonia-nitrogen production by the bivalve molluscTapes japonica and its recovery by the red seaweedHypnea musciformis in a tropical mariculture system

Langton¹,

Haines²,

Lyon³

1977

Helgolander Wiss. Meeresunters

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Production and recovery of ammonia-N was studied in the second and third trophic levels of a mariculture system on St. Croix, US Virgin Islands. The diatom Chaetoceros curvisetus, grown on nutrients in artificially upwelled deep water from 870 m depth, was the food source for Tapes japonica. Consumption of the phytoplankton by T. japonica increased throughout the day and decreased at night, and was related to corresponding changes in algal culture density. Feeding efficiency was highest at night. Ammonia-N production by the clams fluctuated over a typical 24 h period; dropping during the day and increasing at night. The ammonia-N concentration in the shellfish tank effluent was inversely related to the quantity of phytoplankton consumed by the clams. At all ration levels the small clams produced ammonia-N at a greater rate than large clams. H. rnusciformis fragmented and washed out of some tanks; the fragmentation was related to high ammonia-N concentrations in the inflowing water. High light intensity and temperature alone do not appear to cause fragmentation, but may have induced a trace nutrient deficiency in H. musciformis grown in the ammonia-rich seawater. Where fragmentation was not obvious, ammonia-N uptake per g H. musciformis was highly correlated with the average ammonia-N concentration of the inflowing seawater both day and night. Percent uptake of ammonia-N increased with increasing concentration of the nutrient in the inflowing seawater, reaching a plateau of about 70 % uptake of the available ammonia-N at concentrations above 4 ~g-at/1.

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“…Eucheuma, Kappaphycus and Hypnea are distributed plentifully along the Kenya coast, but efforts would have to be made to increase their crop through aquaculture (Haines, 1976;Lapointe et al ., 1976 ;Mshigeni, 1980Mshigeni, , 1982Mshigeni, , 1984Mshigeni, , 1987Parker, 1974 ;Trono et al, 1980 ;Yarish, 1988) . Such programs should be centered at the Shimoni and Wasini Island sites .…”

Section: Discussionmentioning

confidence: 99%

Seaweeds of potential economic importance in Kenya: field survey and future prospects

Yarish

Wamukoya

1990

Hydrobiologia

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Kenya is a net importer of agar and alginate based on recent government statistics, although it may have the potential to be self-sufficient or even an exporter of these phycocolloids . There is little information on carrageenan importation into Kenya since government statistics incorporate it as agar . Seaweeds are relatively unimportant in the Kenyan diet since they are consumed rarely by coastal people . A survey of 15 sites along of the Kenyan coast evaluated the potential for harvesting seaweeds and for establishing seaweed farms . Gracilaria appears to comprise the bulk of the low grade agar import, even though local species of this genus are widely distributed along the Kenyan coast . Major populations of Gelidium may be a potential source of high quality bacteriological grade agar . Eucheuma may be farmed locally to support the increasing local and regional demands for carrageenan . Recommendations for a national program of management and production for Kenya will be discussed .

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The mass outdoor culture of macroscopic marine algae

Cited by 69 publications

References 18 publications

Responses of bloom forming and non-bloom forming macroalgae to nutrient enrichment in Hawai‘i, USA

Responses of bloom forming and non-bloom forming macroalgae to nutrient enrichment in Hawai‘i, USA

Ammonia-nitrogen production by the bivalve molluscTapes japonica and its recovery by the red seaweedHypnea musciformis in a tropical mariculture system

Seaweeds of potential economic importance in Kenya: field survey and future prospects

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