Aquaculture Europe 2021

October 4 - 7, 2021

Funchal, Madeira

Add To Calendar 07/10/2021 15:10:0007/10/2021 15:30:00Europe/LisbonAquaculture Europe 2021INTEGRATION OF THE SEA CUCUMBER Holothuria sanctori TO ABALONE Haliotis tuberculate coccinea GROW-OUT PROCESSESMezzanine-CasinoThe European Aquaculture Societyalistair@aquaeas.eufalseanrl65yqlzh3g1q0dme13067DD/MM/YYYY

INTEGRATION OF THE SEA CUCUMBER Holothuria sanctori TO ABALONE Haliotis tuberculate coccinea GROW-OUT PROCESSES

 G. Courtois de Viçose , M. Magdy

 

 Instituto ECOAQUA/GIA Universidad De Las Palmas De Gran Canaria, Juan de Quesada 30, 35001 Las Palmas de Gran Canaria Spain.

 Email: gtricor@hotmail.com

 



Introduction

Various studies have demonstrated the interest of including deposit feeders, as an integrated element of IMTA systems devoted to the consumption of organic materials (Cubillo et al., 2016). Sea cucumbers are of interest as deposit feeder, for their environmental value, their interesting growth potential and low mortality rates (Zamora and Jeffs, 2012).  Various sea cucumber species within IMTA systems have been tested for co-culture with a variety of fish (Hannah et al., 2013), molluscs (Kang et al., 2003; Zhou, 2006) and seaweed (Beltran‐Gutierrez et al., 2016). The interest of Holothurians as deposit feeders was demonstrated in these studies and their mitigation ability within different IMTA systems was further tested, indicating that sea cucumbers can optimise the net use of wastes (Reid et al., 2013).

Given the existing research, the current study investigates the potential for the integrated culture of the sea cucumber H. sanctori with the abalone Haliotis tuberculata coccinea in order to develop the integrated Land Based IMTA production of these species.

Materials and methods

Experimental specimens

Young individuals of H. sanctori (mean weight: 31.07 ± 14.51 g) were collected at a depth of 0-10 m, by scuba diving, and maintained and acclimated in experimental installations, placing them under abalone (H. tuberculata coccinea) baskets (in which abalone were fed macroalgae). After their indoor acclimation, they were then respectively allocated to experimental IMTA units.

Adult abalone of H. tuberculata coccinea (mean weight: 37.32 ± 9.01g and mean size: 60.83 ± 5.30mm) were obtained from the abalone production unit of the ECOAQUA institute, University of Las Palmas de Gran Canaria.

IMTA experimental set up

Experimental IMTA systems were designed to provide two levels compartments; one for the fed abalone (H. tuberculata coccinea) of 50L capacity and the other for sea cucumber (H. sanctori) located below the abalone compartment. Together located in 300L tank capacity. The abalone compartment was perforated on the bottom and on the sides to allow water exchange and release of abalone wastes to reach the sea cucumber located below.

Stocking density

Tests were performed in triplicates in the IMTA experimental units at two sea cucumber densities (2.5 Specimen.m-2 and 3.75 Specimen.m-2) that were placed under abalone baskets stocked at 50 Specimen/m-2 and weekly fed 0.8kg of IMTA produced macroalgae.

Growth performance and ingestion rate

Weight Gain (WG), and Specific Growth Rate (SGR) were estimated on a monthly basis while ingestion rate was estimated in mg/g/h

Biochemical analysis

Triplicate samples of sea cucumber body wall were collected from experimental and wild specimens and were analyzed for total lipids, protein, carbohydrate, and ash. 

Results

Growth performance

Overall, the mean SGR and WG values differed significantly (p < 0.05) among high density and low-density treatments. All sea cucumber specimens within the density 3.75 sp.m-2, were found to lose weights and exhibit negative SGR and WG values. On the contrary, for specimens stocked at a density of 2.5 sp.m-2, their growth performance improved as all specimens could gain weight and exhibit positive SGR and WG values.

Biochemical analysis

No significant difference (p > 0.05) was observed between the proximate biochemical composition of sea cucumbers produced in the tested IMTA system and the wild-caught specimens, supporting the suitability of such system for the production of this sea cucumber species.

Discussion 

The loss of condition amongst sea cucumber fed abalone faeces at high density in the current experiment indicates that stocking density has a significant impact on H. sanctori growth. Similarly, several authors have reported an inverse proportionality between sea cucumber stocking density and their growth rates (Dong et al., 2010; Pei et al., 2012). Based on these results, a stocking density of 2.5 sp.m-2 is suggested to sustain growth of H. sanctori. In terms of biochemical composition, the similarities observed between the experimental specimens and their wild counterparts suggest the ability of sea cucumbers to adjust their feed intake to satisfy their nutritional requirements and to maintain a steady nutrient composition within their body walls, this being of interest for future successful production of the species.

References

Beltran-Gutierrez, M., Ferse, S.C., Kunzmann, A., Stead, S.M., Msuya, F.E., Hoffmeister, T.S. and Slater, M.J. 2014. Co-culture of sea cucumber Holothuria scabra and red seaweed Kappaphycus striatum. Aquaculture Research 47, 1549-1559.

Cubillo, A.M., Ferreira, J.G., Robinson, S.M.C., Pearce, C.M., Corner, R.A. and Johansen, J. 2016. Role of deposit feeders in integrated multi-trophic aquaculture A model analysis. Aquaculture 453, 54-66.

Dong, S.L., Liang, M., Gao, Q., Wang, F., Dong, Y.W. and Tian, X.L. 2010. Intraspecific effects of sea cucumber (Apostichopus japonicus) with reference to stocking density and body size. Aquaculture Research 41, 1170-1178.

Hannah, L., Pearce, C.M. and Cross, S.F. 2013. Growth and survival of California sea cucumbers (Parastichopus californicus) cultivated with sablefish (Anoplopoma fimbria) at an integrated multi-trophic aquaculture site. Aquaculture 406-407, 34-42.

Kang, K.H., Kwon, J.Y. and Kim, Y.M. 2003. A beneficial coculture: charm abalone Haliotis discus hannai and sea cucumber Stichopus japonicus. Aquaculture 216, 87-93.

Reid, G.K., Robinson, S.M.C., Chopin, T. and MacDonald, B.A. 2013. Dietary proportion of fish culture solids required by shellfish to reduce the net organic load in open-water integrated multi-trophic aquaculture: a scoping exercise with Co-cultured Atlantic salmon (Salmo salar) and blue mussel (Mytilus edulis). J. Shellfish Res. 32, 509-517.

Xia, B., Ren, Y., Wang, J., Sun, Y. and Zhang, Z. 2017. Effects of feeding frequency and density on growth, energy budget and physiological performance of sea cucumber Apostichopus japonicus, (selenka). Aquaculture 466, 26-32.

Zamora, L.N. and Jeffs, A.G. 2012a. Feeding, metabolism and growth in response to temperature in juveniles of the Australasian sea cucumber, Australostichopus mollis. Aquaculture 358-359, 92-97.

Zhou, Y., Yang, H., Liu, S., Yuan, X., Mao, Y., Liu, Y., Xu, X. and Zhang, F. 2006. Feeding and growth on bivalve biodeposits by the deposit feeder Stichopus japonicus Selenka (Echinodermata: Holothuroidea) co-cultured in lantern nets. Aquaculture 256, 510-520.

Acknowledgements

This research is supported by the EU H2020 research and innovation program within the collaborative project “AQUAVITAE– New species, processes and products contributing to increased production and improved sustainability in emerging low trophic, and existing low and high trophic aquaculture value chains in the Atlantic” (https://aquavitaeproject.eu/) under Grant Agreement No. 818173.