ABSTRACT The development of lobster farming in floating net cage in Ekas Bay caused an environmental degradation such as decrease water quality due to some aquaculture wastes. The purposes of this study were to determine the status of water quality and their effect on growth and survival rate of lobster reared in floating net cages (FNC) in the Ekas Bay, West Nusa Tenggara Province. Water sample collection and handling referred to the APHA (1992). Analyses of water quality data were conducted using Principal Component Analysis. Determination of the water quality status of Ekas Bay was performed with STORET system. Multivariate analyses were used to determine the relationship between water quality, growth, and survival rate of lobster reared in FNC. Results showed that Ekas Bay water quality status was categorized in class C (medium contaminated), which exceeded some quality standard parameters such as ammonia (0.3 mg/l), nitrate (0.008 mg/l), and phosphate (0.015 mg/l). During lobster farming activities feeding with trash fish for 270 days, we obtained daily growth rate of 0.74% (lower than normal growth rate of 0.86%), survival rate of 66% (lower than normal survival rate of 86.7%), and feed conversion ratio of 11.15. Ammonia was found as a dominant factor reducing growth and survival rate of lobster reared in FNC. Keywords: water quality, lobsters, growth, survival, Ekas Bay
SUMMARYThe effect of the intestinal changes brought about by the expulsion ofTrichinella spiralisin rats was studied in relation to the growth and survival of a concurrent infection withHymenolepis diminuta, a cestode not normally rejected by the rat in low-level infections. Growth ofH.diminutawas stunted in rats givenT.spiralisjust before, or after, infection withH.diminuta, the stunting being more pronounced when the cestode was given closer to the period of inflammation. There was no loss of the cestode from dual-infected rats and no evidence for destrobilation was found. LowerT.spiralisburdens had a correspondingly weaker effect on growth ofH.diminuta, and stunting was abolished by administration of the anti-inflammatory drug cortisone acetate. It is concluded that the stunting ofH.diminutais probably due to the non-specific inflammatory component of the rat's response toT.spiralisinfection.
<p><strong><em>ABSTRACT</em></strong></p> <p><em>The development of lobster farming in floating net cage in Ekas Bay caused an environmental degradation such as decrease water quality due to some aquaculture wastes. The purposes of this study were to determine the status of water quality and their effect on growth and survival rate of lobster reared in floating net cages (FNC) in the Ekas Bay, West Nusa Tenggara Province. Water sample collection and handling referred to the APHA (1992). Analyses of water quality data were conducted using Principal Component Analysis. Determination of the water quality status of Ekas Bay was performed with STORET system. Multivariate analyses were used to determine the relationship between water quality, growth, and survival rate of lobster reared in FNC. Results showed that Ekas Bay water quality status was categorized in class C (medium contaminated), which exceeded some quality standard parameters such as ammonia (0.3 mg/l), nitrate (0.008 mg/l), and phosphate (0.015 mg/l). During lobster farming activities feeding with trash fish for 270 days, we obtained daily growth rate of 0.74% (lower than normal growth rate of 0.86%), survival rate of 66% (lower than normal survival rate of 86.7%), and feed conversion ratio of 11.15. Ammonia was found as a dominant factor reducing growth and survival rate of lobster reared in FNC.</em></p> <p><em> </em></p> <strong><em>Keywords:</em></strong><em> water quality, lobsters, growth, survival, Ekas Bay</em>
The research has been conducted by February to March 2018 in the Laboratory of Aquaculture, Faculty of Agriculture, Lampung University. The research aim of this to acknowledge the influences of lamp irradiation exposure on growth and survival of juvenile sneakhead fish (Channa striata). This research used a completely randomized design with five treatments, A (12B;12D), B (9B;15D), C (6B;18D), D (3B;21D), and E (0B;24D) with three replications. The research showed that the effect of the length of light irradiation exposure has a significant effect on growth and survival of juvenile snakehead fish. The best treatment found in treatment D, that the resulted highest value of weight growth (5,46 g), daily weight growth (0,121 g/day), length growth (5,37 cm), daily length growth (0,119 cm/day), and survival rate of 97%.
WATER QUALITY AND ITS EFFECT ON GROWTH AND SURVIVAL RATE OF LOBSTER REARED IN FLOATING NET CAGE IN EKAS BAY, WEST NUSA TENGGARA PROVINCE