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Enhanced production of Pacific dulse (Palmaria mollis) for co-culture with abalone in a land-based system: nitrogen, phosphorus, and trace metal nutrition


, : Enhanced production of Pacific dulse (Palmaria mollis) for co-culture with abalone in a land-based system: nitrogen, phosphorus, and trace metal nutrition. Aquaculture 235(1/4): 433-455

Pacific dulse (Palmaria mollis) is a high-quality algal feed for both red abalone (Haliotis rufescens) and Japanese abalone (Haliotis discus hannai); however, culture techniques capable of producing commercial quantities of P. mollis are still in development. This study was undertaken to improve our understanding of nutrient requirements and management strategies for P. mollis production in intensive, land-based systems. All experiments were conducted under moderate to high artificial light of 24-52 mol photons m-2 day-1 and low seawater exchange (1 vol day-1), in order to minimize seawater pumping costs. Application of nutrients every 5-7 days resulted in no significant difference in P. mollis growth compared with daily applications. Nutrient additions during the dark cycle compared with the light cycle were found to be effective in controlling epiphytes. The addition of f medium trace metals (Gran. Can. J. Microbiol. 8 (1962) 229) significantly increased growth rates compared with those of cultures supplied with just nitrate and phosphate alone. The concentration of Zn was increased to equal that of Mn (1.37 micromolar day-1), with resulting improvement in yields. NaNO3(-) as a source of nitrogen was found to be superior for long-term growth (9 weeks) compared with NH4NO3(-), although NH4NO3(-) was superior on a short-term basis (first 2-5 weeks). This was likely due to NH4+-N toxicity resulting from the experimental design. While P. mollis growth was not significantly different between additions of 1176-2942 micromolar day-1 NO3(-)-N (average daily N load), an increasing trend in growth was observed with increasing N loads up to 2942 micromolar day-1 NO3(-)-N. P. mollis showed a sharp decline in growth with P additions above 83.3 micromolar day-1 (average daily P load). Tissue nutrient concentrations and molar ratios (N, P, trace metals, N/P and C/N) can be used in the development of optimal nutrient management strategies to ensure maximum dulse growth rates.

US$19.90

DOI: 10.1016/j.aquaculture.2003.09.010


Other references

Guillén García, P., 2001: Menisci transplantation and autologous chondrocytes. We report 66 patients with chondral and osteochondral knee lesions and 3 with ankle lesions in whom, after clinical and radiological examination, arthroscopy was performed to harvest 0.3 or 0.4 g of hyaline cartilage from the knee or ankle to be s...

Bankole, A.E.; Adekunle, A.A.; Sowemimo, A.A.; Umebese, C.E.; Abiodun, O.; Gbotosho, G.O., 2016: Phytochemical screening and in vivo antimalarial activity of extracts from three medicinal plants used in malaria treatment in Nigeria. The use of plant to meet health-care needs has greatly increased worldwide in the recent times. The search for new plant-derived bioactive agents that can be explored for the treatment of drug-resistant malaria infection is urgently needed. Thus,...

Anh, D.Duc.; Huong, P.Le.Thanh.; Watanabe, K.; Nguyet, N.Thu.; Anh, N.Thu.Hien.; Thi, N.Thi.; Dung, N.Tien.; Phuong, D.Mai.; Tanimura, S.; Ohkusa, Y.; Nagatake, T.; Watanabe, H.; Oishi, K., 2007: Increased rates of intense nasopharyngeal bacterial colonization of Vietnamese children with radiological pneumonia. Acute lower respiratory infection (ALRI), primarily pneumonia, is the leading cause of death in children under the age of five. Bacterial ALRI is preceded by asymptomatic bacterial colonization. Bacterial colonization, therefore, may have an impo...

Shang, X.; Ma, L.; Zhang, S., 1981: Studies on the bionomies and c. Chih wu pao hu hsueh pao = Acta phytophylacica sinica 8(2): 95-100

Ogrin, R.; Woodward, M.; Sussman, G.; Khalil, Z., 2012: Oxygen tension assessment: an overlooked tool for prediction of delayed healing in a clinical setting. Successful wound healing requires adequate transcutaneous oxygen tension (tcpO(2) ). TcpO(2) may not commonly be incorporated in clinical assessments because of variable measurement response at different sensory temperatures. This study aims to as...

Egelston, C.; Kurkó, Júlia.; Besenyei, T.; Tryniszewska, B.; Rauch, T.A.; Glant, T.T.; Mikecz, K., 2013: Suppression of dendritic cell maturation and T cell proliferation by synovial fluid myeloid cells from mice with autoimmune arthritis. To determine whether myeloid cells (such as granulocytes) present in the synovial fluid (SF) of arthritic joints have an impact on adaptive immunity. Specifically, we investigated the effects of SF cells, harvested from the joints of mice with pro...

Deiner, S., 2017: Expanding the Field of Surgical Researchers: The Jahnigen Career Development Award. Under a long-standing collaboration with the John A. Hartford Foundation (JAHF), the Atlantic Philanthropies (AP), and specialty societies in 10 targeted specialties, the American Geriatrics Society (AGS) has been working to improve quality of car...

Teilmann, H., 1980: Primary health services. 1. Health visitors force priority setting. Sygeplejersken 80(10): 16-18

Dettori, G.; Colombo, E.; Biglioli, P., 1981: One case of recurrent torsion of a visceroptosed spleen. Annales de Chirurgie 35(6): 447-448

Clark W.C., 1989: Osseous implant syringe us patent 4801263 january 31 1989. Official Gazette of the United States Patent & Trademark Office Patents 1098(5): 2345