Effect of Salinity and Harvesting on Population Dynamics and Composition of Natural Copepods Fed with Fermented Bran
Abstract
An experiment was conducted to study the effect of 3 different salinity levels (28, 30, 32 ppt) and frequency of harvesting at the end (30 days.) and double harvesting on days 12 and 30 (the end) fed with fermented bran as concentration 150 ppm first feeding only. Factorial design in eighteen of 10-liter plastic tanks for 30 days. The results showed that responded copepods by increasing the maximum copepod density was (mean±SE) 3.1±0.3 and 2.8±0.3 ind./mL on day 2 before the reversal at high density (Mean±SE) 2.8±0.4 and 1.0±0.2 ind./ mL in day 10 at salinity 28 ppt in both 2 harvest, respectively. Different (p<0.01) at high salinity 30 and 32 ppt to copepod density was (mean±SE) 1.3±0.1 and 0.9-0.1 ind./mL at 12-14 days before increasing at the same approach. Half-harvested copepods at 12 days did not affect of density copepods in the end. Most types of copepod were order calanoid, cyclopoid and harpacticoid copepod (Percent 59.1±0.1, 27.9, 12.5) and the stage were nauplii, adult, copepodite and adult with eggs (Percent 55.8±4.8, 24.5±3.4, 19.2±2.1, 0.5±0.2), respectively. Concluded there were copepods prefer salinity of 28 ppt and double harvesting increased the production of copepods. Keywords : salinity; harvest ; rice bran ; copepodReferences
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Peck, A. M and Linda Holste. (2006). Effects of salinity, photoperiod and adult stocking density on egg production and egg hatching success in Acartia tonsa (Calanoida: Copepoda): Optimizing intensive cultures. Aquaculture, 255, 341–350.
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Sanomuang, L. (2002). Freshwater zooplankton. Calanoid copepods in Thailand. Khon Kaen: Applied Taxonomy Research Center, Department of Biology, Faculty of Science, Khon Kaen University. (in Thai)
Wang, Z.L., (1995). Distribution of pelagic copepods in Dalian Bay.Journal of Oceanography of Huanghai & Bohai Seas 13 (1),47–54.
Wongrat, L. (1998). Zooplankton. First type 1. Publisher, Kasetsart University, Bangkok. (in Thai)
Wongrat, L. (2000). A Guide to Plankton Cultivation. 3rd printing, KU Publishing House. (in Thai)
Cheng, S. H., AOKI, S., Maeda, M. and Hino, A. 2004. Competition between the rotifer Brachionus rotundiformis and the ciliate Euplotes vannus fed on two different algae. Aquaculture, v. 241, n. 26, p. 331-343.
Costa, K. G., Pereira, L. C. C., & Costa, R. M. (2008). Short and long-term temporal variation of the zooplankton in a tropical estuay (Amazon region, Brazil). CienciasNaturais,3(2), 127-141.
Dahm, H. (2000). Phylogenetic Implications of the Crustacean Nauplius. Advance in Copepod Taxonomy. Hydrobiologia. 417 91-99.
Huang, J.Q., Li, S.J., Hou, H.B., et al., (2000). Community characteristics of planktonic copepods in Luoyuan Bay, Fujian. Marine Sciences 24 (6), 1–4.
Long, L.J., He, W.H., (1995). The effect of various salinity on the growth and reproduction of Euterpe acutifrons. Supplement to the Journal of Sun Yatsen University 3, 61–63.
Lin, L.M., Xu, F., Lin, J., (1998). The effect of various salinity on the growth and development of Acartia spinicauda. Journal of Oceanography in Taiwan Strait 17, 53–55 (supplement).
Liu, M., Chen, S.J., (1995). Study on the culturing Apocyclops royi. Fujian Fisheries 2, 19–22.
McKinnon, A.D., S. Duggan, P.D. Nichols, M.A. Rimmer, G. Semmens & B. Robino. (2003). The Potential of Tropical Paracalanid Copepods as Live Feeds in Aquaculture. Aquaculture. 223 (1): 89-106.
Miller, Denise D., Marcus, Nancy H., (1994). The effects of salinity and temperature on the density and sinking velocity of eggs of the calanoid copepod Acartia tonsa Dana [J]. Journal of Experimental
Marine Biology and Ecology 179 (2), 235–252.
Nagaraj, M., (1992). Combined effects of temperature and salinity on the development of the copepod Eurytemora affinis. Aquaculture 103 (1), 65–71.
Peck, A. M and Linda Holste. (2006). Effects of salinity, photoperiod and adult stocking density on egg production and egg hatching success in Acartia tonsa (Calanoida: Copepoda): Optimizing intensive cultures. Aquaculture, 255, 341–350.
Romano, N. (2017). Aquamimicry: a revolutionary concept for shrimp farming. 5 pp. Retrieved from https://www.researchgate.net/deref/httpเปอร์เซ็นต์3Aเปอร์เซ็นต์2Fเปอร์เซ็นต์2Fadvocate. gaalliance.org เปอร์เซ็นต์2Faquamimicry-a-revolutionary-concept-for-shrimp-farmingเปอร์เซ็นต์2F.
Santhosh B., Anil M. K., Muhammed Anzeer F., Aneesh K. S.,Mijo V. Abraham, Gopakumar G., Rani Mary George, Gopalakrishnan A. and Unnikrishnan C. (2018). Culture Techniques of marine Copepods. CMFRI Booklet No.9/2018. ISBN 978-93-82263-23-4. Indian Council of Agricultural Research Central Marine Fisheries Research Institute. 142 p.
Sanomuang, L. (2002). Freshwater zooplankton. Calanoid copepods in Thailand. Khon Kaen: Applied Taxonomy Research Center, Department of Biology, Faculty of Science, Khon Kaen University. (in Thai)
Wang, Z.L., (1995). Distribution of pelagic copepods in Dalian Bay.Journal of Oceanography of Huanghai & Bohai Seas 13 (1),47–54.
Wongrat, L. (1998). Zooplankton. First type 1. Publisher, Kasetsart University, Bangkok. (in Thai)
Wongrat, L. (2000). A Guide to Plankton Cultivation. 3rd printing, KU Publishing House. (in Thai)
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2023-05-11
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