期刊
AQUACULTURE
卷 260, 期 1-4, 页码 114-127出版社
ELSEVIER
DOI: 10.1016/j.aquaculture.2006.05.057
关键词
rock lobster; density; shelter; survival; growth; aquaculture
The growth and survival of three size classes of wild caught western rock lobster, Panulirus cygnus (post-pueruli: mean 2,14 +/- 0.07 g, 13.2 +/- 0.1 min CL; year 1: post-settlement juveniles, 57.1 +/- 1.1 g, 38.7 +/- 10.28 min CL; and year 2 post-settlement juveniles, mean 138.2 +/- 2.26g, 51.9 +/- 0.25 mm CL) were examined at combinations of two stocking densities (post-pueruli: 50 and 100 m(-2); year 1: 11 and 23 m(-2); year2: 10 and 19m(-2)) and two shelter types (a novel rigid plastic mesh shelter or bricks) over a period of 6months. Survival of lobsters held at the lower densities (90-95%) was significantly greater than for lobsters held at higher densities (post-pueruli=78%, year1 =86%, year2=88%). Post-pueruli survival was significantly higher in tanks with mesh shelters (91.7%) than brick shelters (75.8%) with a similar trend exhibited by year I and year2 lobsters. Densities tested did not significantly affect lobster growth for any size class. Growth of post-pueruli was considerably higher in tanks with mesh shelters (641.7% weight gain; specific growth rate 1.07 BW day(-1)) (p < 0.05) but there was no difference in the growth of year1 and year2 lobsters between mesh and brick shelters. Feed intake (g pellet dry matter lobster(-1) day(-1)) was not significantly different between densities. This study has shown that R cygnus is well suited for aquaculture based on the collection and ongrowing of wild caught pueruli, as this species exhibits good survival at high densities (up to 100m(-2)) without adverse effects on growth, and shows no captivity-related health problems. We recommend mesh shelters, with stocking densities of 50m(-2) for post-pueruli and between 20 and 25m(-2) for year1 and year2 juveniles, to maximise survival and production. Crown Copyright (c) 2006 Published by Elsevier B.V. All rights reserved.
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