The mass cultivation of Ecklonia stolonifera Okamura as a summer feed for the abalone industry in Korea

Abstract

The mass cultivation of Ecklonia stolonifera Okamura was studied as a possible summer feed for the abalone industry in Korea for the period between August and November when Undaria and Laminaria are not available. Experiments were conducted to investigate the optimal conditions for artificial seed production and mass cultivation of this species. Seedlings of E. stolonifera were reared in an indoor tank for 60 days until they were around 500 μm in length. Following indoor tank culture, the seedlings were transferred in situ to a nursery culture area for 2 months, before begin transferred to the main grow-out area. The maximum growth and development of young thalli in nursery culture area occurred at 2 m depth, whilst maximum growth of thalli in the main culture area occured at 1.5 m depth. Production of E. stolonifera was between 3 and 9 kg wet wt. m −1 in the first year of culture after seeding and 12 to 13 kg wet wt. m −1 in the second year of culture, after management (depth control and fouling organism removal, etc.) of the holdfast. The relationship between optimal water depth for culture and underwater irradiance during the E. stolonifera cultivation was defined as: y =−0.331x+ 8.198 (r 2 =0.9903). The growth rates achieved in this trial indicate that E. stolonifera cultures could produce sufficient biomass to supply summer feed for the Korean abalone industry.

Cultivation of a brown alga, Undariopsis peterseniana (Kjellman) Miyabe and Okamura, as a warm-temperature species by artificial seed production in Korea

“…In Korea, the rapidly expanding abalone industry is reliant on the seaweed aquaculture industry, for the production of abalone feed (Hwang et al 2009). Currently, during the summer months, due to the annual die back of U. pinnatifida, there is a shortage of feed for abalone.…”

“…The probe was held at each depth for 5 min, during which time a average reading was taken. Surface PAR measurements were taken between each depth reading at the start and end of depth profiles at each site as described by Hwang et al (2008Hwang et al ( , 2009. Seawater temperature at the cultivation site was compared with mean monthly seawater temperature records in Jeju collected during the 5 year period from 2003(KODC 2003 (Fig.…”

“…The grow-out used system consisted of a horizontal rope system modified from Sohn and Kain (1989), where 100 m long horizontal ropes were held at each of the experimental culture depths following the protocol of Hwang et al (2009). For each experiment, a fresh batch of juvenile plants taken from the original zoospore settlement strings, which had been held under the same environmental conditions (2 m depth), were used for the nursery and main cultivation experiments.…”

Crossed Effects of Light and Temperature on the Growth and Maturation of Gametophytes in Costaria costata and Undaria pinnatifida

“…, (strain) , , Wi et al, 2008;Hwang et al, 2010). · (hybrid) (Pang et al, 1997;Morita et al, 2003;Wu et al, 2004;Choi et al, 2005;Druehl et al, 2005), , , , Westermeier et al, 2006;Hwang et al, 2009;Xu et al, 2009;Hwang et al, 2010). (Wu et al, 1994;Kaas, 1998;Li et al, 1999;Wu et al, 2004;Xu et al, 2009) 20 , (Xu et al, 2009 (Serisawa et al, 2002).…”

Nursery and Main Culture Conditions for Mass Cultivation of the Brown Alga, Ecklonia cava Kjellman

“…집약적인 양식을 통한 해조류의 대량 양식기 술은 중국, 일본 그리고 우리나라의 김, 미역 및 다시마 (Kawashima, 1984;Tseng, 1987;Ohno and Matsuoka, 1993;Oohusa, 1993) 등에서 발달되어왔다. 감태 (Ecklonia cava Kjellman)는 해중림을 구성하는 대형 갈조류로서 연안 생태계에서 1차 생산자로서의 중요한 기능 을 담당하고 있으며 (Kang and Yoo, 1993;Brown and Lamare, 1994), 해중림 조성용, 식용 또는 기능성 물질의 추출원 (Athukorala et al, 2006;Hong et al, 2006) 감태의 안정적인 대량양식 생산을 유도하기 위해서는 최근 모자반 (Hwang et al, 2007)과 곰피 (Hwang et al, 2009 (Fig. 1A).…”