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Mesocosm Hatcheries Using Semi-intensive Methodologies and Species Diversification in Aquaculture

Journal of Agricultural Science and Technology(B) 2012年第4期2卷 428-437页

作者： Carlos Andrade Natacha Nogueira Paula Silva Maria Teresa Dinis Luis Narciso Centro de Marieultura da Calheta Direccao Regional de Pescas Calheta 9370-133 Madeira Portugal CCMAR Universidade do Algarve Campus de Gambelas Faro 8005-139 Portugal Centro de Oceanografia Laboratorio Maritimo da Guia FCUL Avenida N. S. do Cabo 939 Caseais 2750-642 Portugal

Mesocosm hatcheries using semi-intensive culture methodologies are characterized by large tanks （40 m3） for fish larvae production at low densities （2-8 larvae/L）, with live prey production within the tank supplemented by exogenous sources of feed. Due to the high biological quality of larvae produced and low level of technological input, these methodologies are regarded as an interesting option to meet the increasing fry demand from the aquaculture industry. This study aimed to describe the experience at Centro de Maricultura da Calheta, Madeira Island, Portugal, with the establishment of a mesocosm hatchery for the production of marine fish larvae. Production trials were initiated with gilthead seabream Sparus aurata. This larval species presented faster growth in total body length （TL） per day （TL = 3.7516e~ ~293day, R2 = 0.9404）, higher survival rate （SR = 31.9%） and comparable swimbladder inflation rates （SB = 90%） to those of larvae reared with intensive methodologies. High larval performance was obtained with two candidate species for aquaculture： the red porgy Pagruspagrus （TL = 3.212e~~39day, R2 = 0.995; SR = 15.3%; SB = 95.7%） and the white seabream Diplodus sargus （TL = 3.6355e~~413day, R2= 0.9824; SR = 25%; SB --- 100%）. Testing ofa 110 m3 mesocosm rearing tank with white seabream larvae revealed limitations associated to larger tanks namely, the amount and quality of live feed required daily. First trials with striped jack （Pseudocararoc dentex） larvae resulted in low larval survival （0.04%）, but the use of a white tank avoided culture management constraints related to positive phototropism. The present results suggest that a mesocosm using semi-intensive methodologies may contribute to species diversification and consequently, to the sustainable development of aquaculture.

关键词： Mesocosm hatchery fish larvae performance Sparus aurata Pagrus pagrus Diplodus sargus Pseudocarartx dentex.

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