The Effect of Variable Incubation Temperatures on Hatchability and Survival of Goldlined Seabream, Rhabdosargus sarba (Forsskål,1775) Larvae

The effect of varying holding temperature on hatching success, occurrence of deformities and mortality rates were investigated for goldlined seabream eggs. Wild broodstock (600 g) were stocked at a 2:1 male-female ratio in a 2 m3 fiberglass tank supplied with filtered seawater (37 g L-1 salinity, temp. range 24±0.5 oC [day] and 22±1 oC [night], DO2 in excess of 5.0mg L-1). Females were injected with 200 IU kg-1 HCG between 08.00 and 10.00 h and returned to tanks to spawn following which eggs were collected by hand using a 100μm net. Fertilized eggs at the gastrulation stage (120 L-1) were randomly placed into one of 12 experimental 6 L aerated (DO2 5 mg L-1) plastic containers with water temperatures maintained at 24±0.5 oC (ambient), 26±0.5 oC, 28± 0.5 oC and 30±0.5 oC using thermostats. Each treatment was undertaken in triplicate using a 12:12 photophase:scotophase photoperiod. No differences were recorded between eggs reared at 24 and 26 oC with respect to viability, deformity, mortality or unhatched egg rates. Increasing temperature reduced the number of viable eggs with those at 30 oC returning poorest performance (P < 0.05). Mortality levels were lowest for eggs incubated at 24 and 26 oC. The greatest level of deformities recorded was that for eggs reared at 28 oC.





References:
[1] Buschmann, A.H., Cabello, F., Young, K., Carajal, J., Varela, D.A. and
Henriquez, L. (2009). Salmon aquaculture and coastal ecosystem health
in Chile: A nalaysis of regulations, environmental impacts and
bioremediation systems. Ocean and Coastal Management, 52, 243-249.
[2] Pillay, T.V.R. (2004). Aquaculture and the Environment 2nd edition.
Wiley-Blackwell, Oxford, UK. 208 pp.
[3] Forrest, B.M., Keeley, N.B., Hopkins, G.A., Webb, S.C. and Clement,
D.M. (2009). Bivalve aquaculture in estuaries: Review and synthesis of
oyster cultivation effects. Aquaculture, 298, 1-15.
[4] Hinojosa I.A. and Thiel, M. (2009). Floating marine debris in fjords,
gulfs and channels of southern Chile. Marine Pollution Bulletin, 58,
341-350.
[5] Arismendi, I., Soto, D., Penaluna, B., Jara, C., Leal, C. and Léon-M¶Ççînoz,
J. (2009). Aquaculture, non-native salmonid invasions and associated
declines of native fishes in Northern Patagonian lakes. Freshwater
Biology, 54, 1135-1147.
[6] Lafferty, K.D., Porter, J.W. and Ford, S.E. (2004). Are diseases
increasing in the ocean? Annual Review of Ecology, Evolution and
Systematics, 35, 31-54.
[7] Munro, J.T. and Owens, L. (2007). Yellow head-like viruses affecting
the penaeid aquaculture industry: a review. Aquaculture Research, 38,
893-908.
[8] Mclean, E., Salze, G. and Craig, S.R. (2008). Parasites, diseases and
deformities of cobia. Ribarstvo, 66, 1-17.
[9] Wille, K., McLean, E., Goddard, J.S. and Byatt, J.C. (2002). Dietary
lipid level and growth hormone alter growth and body conformation of
blue tilapia Oreochromis aureus. Aquaculture, 209, 219-232.
[10] McLean, E., Wille, K., Goddard, J.S., Al-Oufi, J.S. and Al-Akhzami,
Y.K. (2002). Tilapia research in the Sultanate of Oman: Present status
and outlook. pp. 155-178, In: Contemporary Issues in Marine Science
and Fisheries. Hasanuddin University Press, Makassar, Indonesia.
289pp.
[11] Goddard, J.S., Al-Shagaa, G. and Ali, A. (2008). Fisheries by-catch and
processing waste meals as ingredients in diets for Nile tilapia,
Oreochromis niloticus. Aquaculture Research, 39, 518-525.
[12] Hiscock, S., Barratt, L. and Ormond, R. (1984). The marine algae of
Dhofar, Oman - an upwelling system in the Arabian Sea. British
Phycological Journal, 19, 194.
[13] Randall, J.E. (1995). Coastal fishes of Oman. University of Hawai-i
Press, Ohau, USA. 437 pp.
[14] Al-Abdessalaam, T.Z.S. (1996). Marine Species of the Sultanate of
Oman. Marine Science and Fisheries Center, Ministry of Agriculture and
Fisheries, Muscat, Oman. 412 pp.
[15] Jupp, B.P. (2002). Guidebook to the seaweeds of the Sultanate of Oman.
Ministry of Agriculture and Fisheries, Muscat, Sultanate of Oman.
Publication No. 2002/170, 152 pp.
[16] Woo, N.Y.S.; Kelly, S.P., 1995: Effects of salinity and nutritional status
on growth and metabolism of Sparus sarba in a closed seawater system.
Aquaculture, 135, 229-238.
[17] Radebe, P.V.; Mann, B.Q.; Beckley, L.E.; Govender, A. (2002) Age and
growth of Rhabdosargus sarba (Pisces: Sparidae), from Kwazulu-Natal,
South Africa. Fisheries Research. 58, 193-20.
[18] Leu, M.Y. (1994). Natural spawning ad larval rearing of silver bream
Rhabdosargus sarba (Forskal), in captivity. Aquaculture, 120, 115-122.
[19] Hesp, S.A., Potter, I.C., Schubert, S.R.M. (2004). Factors influencing the
timing and frequency of spawning and fecundity of the goldlined
seabream (Rhabdosargus sarba) (Sparidae) in the lower reaches of an
estuary. Fishery Bulletin, 102, 648-660.
[20] Hughes, J.M., Stewart, J., Kendall, B.W., (2008). Growth and
reproductive biology of tarwhine Rhabdosargus sarba (Sparidae) in
eastern Australia. Marine and Freshwater Research, 59, 1111-1123.
[21] Mihelakakis, A., Yoshimatsu, T. (1998). Effects of salinity and
temperature on incubation period, hatching rate and morphogenesis of
the red sea bream. Aquaculture International 6, 171-177.
[22] Jennings, S., M., and G. Pawson. 1991. The Development of sea bass,
Dicentrarchus labrax, eggs in relation to temperature. Journal of Marine
Biology, 71: 107-116.
[23] Sokal, R. R.; Rohlf, F.J., 1995: Biometry: the principles and practice of
statistics in biological research. 3rd ed. W. H. Freeman, New York,
USA. 887pp.
[24] Polo, A., M. Yufera, and E. Pascual. (1990). Effects of temperature on
egg and larval development of Sparus aurata L. European Aquaculture
Society Special Publication 1989, Bredene, Belgium; No:10, pp. 207-
208.
[25] Ibrahim, F.S. (2004) Reproductive biology of wild goldlined seabream,
Rhabdosargus sarba, captive breeding and larval development in the
Sultanate of Oman. PhD thesis, University of Stirling, Scotland, U.K,
344p.
[26] Bermudes, M. and Ritar, A. J. (1999) Effects of temperature on the
embryonic development of the striped trumpeter (Latris lineata Bloch
and Schneider, 1801). Aquaculture, 176, 245-255.
[27] Watanabe, W.O., Lee, C., Ellis, S. C., Ellis E. P. (1995). Hatchery
study of the effects of temperature on eggs and yolksac larvae of the
Nassau grouper, Epinephelus striatus (1999). Aquaculture, 136, 141-
147.
[28] Andrades, J. A., Becerra, J., Fernández-Llebrez, P. (1996). Skeletal
deformities in larval, juvenile and adult stages of cultured gilthead sea
bream (Sparus aurata L.). Aquaculture, 141, 1-11).
[29] Bahmani, M; Sarvi Gheeyasabadi, A; Kazemi, R; Sarvi Gheeyasabadi, F.
(2009). A study on embryonic development of Yellow Fin Seabream
(Acanthopagrus latus). Iranian scientific fisheries journal (Iran. Sci.
Fish. J.). Vol. 18, no. 1, pp. 33-42. 2009.