Effect of stocking density on growth performance of juvenile sea cucumber Holothuria tubulosa (Gmelin, 1788)

2016 ◽  
Vol 48 (8) ◽  
pp. 4124-4131 ◽  
Author(s):  
Tolga Tolon ◽  
Dilek Emiroğlu ◽  
Deniz Günay ◽  
Begüm Hancı
Keyword(s):  
Growth Performance ◽  
Sea Cucumber ◽  
Stocking Density

Influence of intra- and interspecific competition on periphyton biomass and growth performance of Holothuria scabra juveniles

2021 ◽  
Author(s):  
Jay RC Gorospe ◽  
Marie Antonette Juinio-Meñez ◽  
Paul C Southgate
Keyword(s):  
Growth Performance ◽  
Interspecific Competition ◽  
Sea Cucumber ◽  
Feeding Activity ◽  
Stocking Density ◽  
Control Treatment ◽  
Juvenile Survival ◽  
Holothuria Scabra ◽  
Periphyton Biomass ◽  
Juvenile Density

The effects of sea cucumber (Holothuria scabra) juvenile density and interspecific competition from the opisthobranch Stylocheilus striatus (SS) on periphyton biomass and growth performance of H. scabra (HS) were assessed. The number of H. scabra juveniles (15, 50, 100) in net enclosures (treatments HS15, HS50, and HS100) was varied and feeding activity of S. striatus was assessed at a density of 15 individuals per net enclosure (treatment SS15), and in co-culture with H. scabra (treatment HS15/SS15). A control treatment without H. scabra or S. striatus was included in the 28-d experiment. Highest and lowest growth rates of H. scabra occurred in the lowest (HS15) and highest (HS100) stocking density treatments, respectively, on days 14 and 28. Growth of H. scabra juveniles in the HS15 treatment was more than double that of those in the HS15/SS15 treatment. Juvenile survival was significantly higher in the HS15 treatment on days 14 and 28, but did not differ significantly from that of juveniles in the HS15/SS15 and HS50 treatments on day 14. Grazing activity of sea cucumber juveniles and S. striatus resulted in a decline in periphyton biomass (AFDW) after day 7. Differences in food consumption (based on faecal production) among treatments were significant only on days 1 and 21 with the greatest consumption (17.5 mg periphyton ind−1 d−1) by S. striatus in the SS15 treatment. Holothuria scabra juveniles in the HS15 treatment consumed 4.9 mg ind−1 d−1, while those in the HS100 treatment consumed only 1.8 mg ind−1 d−1 after 24 hrs.

Effects of potential probiotics on growth performance and immune response of the juvenile sea cucumber (Apostichopus japonicus)

2010 ◽  
Vol 34 (6) ◽  
pp. 775-783 ◽  
Author(s):  
Hui-hui ZHOU ◽  
Hong-ming MA ◽  
Wen-bing ZHANG ◽  
Wei XU ◽  
Zhi-guo LIUFU ◽  
...  
Keyword(s):  
Immune Response ◽  
Growth Performance ◽  
Sea Cucumber ◽  
Apostichopus Japonicus

scholarly journals PSV-3 Effects of space allowance and marketing strategy on growth performance of pigs raised to heavy market weights

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 156-157
Author(s):  
Annie B Lerner ◽  
Mike D Tokach ◽  
Joel M DeRouchey ◽  
Steve S Dritz ◽  
Robert D Goodband ◽  
...  
Keyword(s):  
Marketing Strategy ◽  
Growth Performance ◽  
Feed Intake ◽  
Stocking Density ◽  
Experimental Unit ◽  
Heavy Weight ◽  
Reduced Space ◽  
Market Weights

Abstract A total of 976 pigs (PIC 327×L42, initially 22 ± 1.5 kg BW) were used in a 160-d study to determine the influence of space allowance and marketing strategy on performance of pigs raised to heavy market weights (165 kg). Pens were blocked by location and allotted to 1 of 6 treatments with 8 pens/treatment. The first four treatments reduced space allowance/pig via initial pen stocking density: 14 pigs/pen (1.20 m2/pig), 17 pigs/pen (0.98 m2/pig), 20 pigs/pen (0.84 m2/pig), or 23 pigs/pen (0.73 m2/pig). The fifth treatment began with 25 pigs/pen (0.67 m2/pig) and the heaviest 3 pigs/pen were removed on d 93, then on d 122 pens were marketed to a common inventory of 20 pigs/pen, and on d 147 marketed to a common pen inventory of 17 pigs/pen. The sixth treatment began with 23 pigs/pen (0.73 m2/pig) and were marketed to a common inventory of 20 pigs/pen on d 108 and marketed to a common inventory of 17 pigs/pen on d 147. Data were analyzed using PROC GLIMMIX with pen as the experimental unit. Overall (d 0 to 160) ADG, ADFI, and final BW decreased (linear, P < 0.001) and G:F increased (quadratic, P = 0.042) as space allowance decreased. When comparing treatments with multiple marketing events (treatments 5 and 6) to treatment 4, there was no evidence for differences (P > 0.05) for overall ADG or ADFI; however, overall G:F was improved (P < 0.05) for pigs initially stocked at 0.67 m2/pig and marketed four times compared to both treatments that initially allowed 0.73 m2/pig, regardless of marketing structure. These results indicate that decreasing space allowance of heavy weight pigs reduces growth, feed intake and final BW, although use of multiple marketing events prior to final marketing may allow for increased number of pigs marketed/pen while balancing reduced growth performance often associated with increased stocking density. http://www.conferenceharvester.com/

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