scholarly journals PERTUMBUHAN LARVA DAN PRODUKSI BENIH IKAN KERAPU BEBEK Cromileptes altivelis Valenciennes, 1828 HASIL BUDIDAYA TURUNAN KE-3

2018 ◽  
Vol 10 (3) ◽  
pp. 589-600
Author(s):  
Regina Melianawati ◽  
Ni Wayan Widya Astuti ◽  
. Tridjoko

ABSTRAKKetersediaan induk dalam suatu usaha pembenihan memiliki peran yang sangat penting. Namun demikian, ketersediaan induk yang berasal dari alam sangat terbatas jumlahnya, sehingga perlu dilakukan penyediaan calon induk yang berasal dari hasil budidaya. Ikan kerapu bebek Cromileptes altivelis Valenciennes, 1828 turunan pertama (F-1) dan turunan kedua (F-2) sudah dapat diproduksi dari hasil budidaya, namun benih turunan ketiga (F-3) belum dapat diperoleh. Penelitian ini bertujuan untuk mendapatkan karakteristik morfologis dan pertumbuhan larva ikan kerapu bebek F-3 sebagai calon induk F-3, serta tingkat keberhasilan produksi benihnya. Pemeliharaan larva dilakukan dalam hatchery hingga larva menjadi benih. Parameter yang diamati meliputi panjang total dan panjang duri sirip larva, berat tubuh larva serta sintasan dan jumlah produksi benih. Hasil penelitian menunjukkan bahwa panjang total larva umur 5, 15, 25 dan 35 hari, masing-masing adalah 3,20±0,07; 4,42±1,11; 8,35±1,12 dan 12,51±3,23 mm. Duri sirip mulai terukur pada larva umur 15 hari. Berat larva umur 30 hari adalah 0,11±0,04 g. Pola pertumbuhan panjang total dan berat tubuh larva adalah eksponensial, sedangkan pola pertumbuhan duri siripnya adalah linier. Masa pemeliharaan larva hingga menjadi benih adalah ± 40 hari. Jumlah benih ikan kerapu bebek F-3 yang diproduksi dalam satu kali siklus pemeliharaan berkisar 440 hingga 2.300 ekor dari 50 ekor induk dan 3 kali siklus pemijahan dengan tingkat kelangsungan hidup 1,30% hingga 8,80%. Hasil penelitian ini mengindikasikan bahwa ikan kerapu bebek F-3 dapat diproduksi dari hasil budidaya seperti halnya pada F-1 dan F-2. ABSTRACTBroodstocks are the most important part of humpback grouper culture, but their availability in nature are limited. Therefore, it is necessary to produce broodstock candidates from culture. The first (F-1) and the second (F-2) generation of humpback grouper have already been produced but the third generation (F-3) production is still on the way. This study was conducted to find out morphological characteristic of the third generation (F-3) of humpback grouper larvae as the candidate of the third generation of broodstock, larval growth and the success rate of seed production. Larvae rearing was done in hatchery until larvae metamorphosed to be seeds. Observed variables including larval total length and spine length, larval body weight, survival rate and the juvenile productions. The study result showed the total length of 5, 15, 25 and 35 days old larvae were 3.20±0.07; 4.42±1.11; 8.35±1.12 and 12.51±3.23 mm, respectively. The spine began measured on 15 days old larvae. The body weight of 30 days old larvae was 0.11±0.04 g. The growth pattern of larval total length and body weight were exponential, while the growth of spine was linear. Rearing period from larvae to juveniles was 40 days. Number of F-3 seed production of humpback grouper produced from once rearing cycle range between 440 and 2,300 fish and the survival rate range from 1.30% up to 8.80%. Therefore, this study could indicate that seed of F-3 humpback grouper can be produced as those of F-1 and F-2.

2008 ◽  
Vol 43 (3) ◽  
pp. 311-319
Author(s):  
Yu Cheng Zhu ◽  
Fengyi Liu ◽  
Zhiping Xu ◽  
Juhua Chang ◽  
Craig A. Abel ◽  
...  

Large-scale cultivation of Bt cotton places high selection pressure on target insects and, consequently, may prompt resistance evolution in pest populations. To better monitor Bt-resistance allele frequency in field populations, a modification of the F1 screen was developed to screen F1 progeny derived from single pair mating between field-collected males and laboratory resistant females (designated as F1 screen). This method was used to survey a field population of Heliocoverpa armigera (Hübner) for resistance alleles at the same loci in the resistant strain. After treatment of the F1 progeny derived from more than 260 single pair mating lines with Bt cotton, there was no clear separation of resistant genotypes from susceptible genotypes based on survival rates which demonstrated a linear distribution within a certain range. We further analyzed larval growth data of the F1 progeny and found a correlation between larval body weight and survival rate. The maximum correlation was obtained when F1 larval body weight reached ≥0.7 mg. To avoid underestimation, body weight ≥0.6 mg was used to initially separate potential positive lines (resistant genotype). After that, a corrected survival rate of >21.3% (the minimal theoretical rate of >25% for F0 males to carry sr and rr genotypes) was used as the criterion to examine F2 progeny derived from single sib-mating of F1 adults and to verify whether the potential positive lines carried resistant alleles.


2015 ◽  
Vol 6 (2) ◽  
Author(s):  
Tony Setia Dharma

<p><strong><em>ABSTRACT</em></strong><strong><em> </em></strong></p> <p><em>Golden trevally fish is a prospective commodity that can be cultured and contains high economic value. The purpose of th</em><em>is</em><em> study was to </em><em>determine t</em><em>he </em><em>best type of food for</em><em> </em><em>g</em><em>olden trevally fish </em><em>growth</em><em>. </em><em>The larval rearing were conducted using concrete tanks </em><em>with</em><em> 6 m<sup>3</sup></em><em> of volume</em><em>. Three different f</em><em>ood</em><em> were used as treatments, i.e: (a) pellet micro, (b) small shrimp</em><em>,</em><em> and (c) tr</em><em>a</em><em>sh fish. The start of experiment </em><em>for </em><em>larvae were reared for 30 days old. The stocking density of larvae </em><em>was reared at </em><em>10 pc/</em><em>l</em><em>. Sampling of larvae were conducted every 7 days to measure of survival rate (SR), total length (TL) and body weight (BW). The larvae were reared with flowthrow system. At 70 </em><em>days </em><em>old, larvae were harvested and graded. The results showed that </em><em>there </em><em>was no</em><em> </em><em>significantly different among treatments (P&gt;0.05)</em><em> for survival rate</em><em>, but the growth </em><em>was</em><em> significantly difference among treatments (P&lt;0.05). The survival rate (SR) </em><em>treated with t</em><em>r</em><em>a</em><em>sh fish</em><em> was</em> <em>5.38±1.20%,</em> <em>small shrimp </em><em>4.05±1.10%</em><em>, </em><em>and mi</em><em>c</em><em>ro </em><em>pel</em><em>l</em><em>et </em><em>4.01 ± 1.20%</em><em>. </em><em>The total length and weight</em> <em>treated with</em> <em>tr</em><em>a</em><em>sh fish </em><em>were </em><em>5.40 ± 0.80 cm and 53±0,50 mg</em><em>, respectively, while treaded with small shrimp were</em><em> 4.80 ± 0.20 cm and  61±0.30 mg</em><em>, </em><em> and mi</em><em>c</em><em>ro pellet were 4.54±0.56 cm</em><em> </em><em>and 48±0.40 mg</em><em>, respectively</em><em>.</em><strong></strong></p> <p class="Default"><em> </em></p> <strong><em>Keywords</em></strong><em>: seed, food type, growth, survival, golden trevally fish.</em>


2015 ◽  
Vol 6 (2) ◽  
Author(s):  
Tony Setia Dharma

ABSTRACT Golden trevally fish is a prospective commodity that can be cultured and contains high economic value. The purpose of this study was to determine the best type of food for golden trevally fish growth. The larval rearing were conducted using concrete tanks with 6 m3 of volume. Three different food were used as treatments, i.e: (a) pellet micro, (b) small shrimp, and (c) trash fish. The start of experiment for larvae were reared for 30 days old. The stocking density of larvae was reared at 10 pc/l. Sampling of larvae were conducted every 7 days to measure of survival rate (SR), total length (TL) and body weight (BW). The larvae were reared with flowthrow system. At 70 days old, larvae were harvested and graded. The results showed that there was no significantly different among treatments (P>0.05) for survival rate, but the growth was significantly difference among treatments (P<0.05). The survival rate (SR) treated with trash fish was 5.38±1.20%, small shrimp 4.05±1.10%, and micro pellet 4.01 ± 1.20%. The total length and weight treated with trash fish were 5.40 ± 0.80 cm and 53±0,50 mg, respectively, while treaded with small shrimp were 4.80 ± 0.20 cm and  61±0.30 mg, and micro pellet were 4.54±0.56 cm and 48±0.40 mg, respectively. Keywords: seed, food type, growth, survival, golden trevally fish.


2021 ◽  
Author(s):  
shewangizaw woltamo wolde ◽  
Tadele Mirkena ◽  
Aberra Melesse ◽  
Tadelle Dessie ◽  
Solomon Abegaz

Abstract The Normal Feathered local chicken (LL), Sasso-RIR (SRSR) and their F1-cross (LSR) chickens were hatched to evaluated for egg hatchability, growth performance, feed efficiency and survival rate. After 14-days of brooding, 150 chicks of each genotype were randomly selected and further replicated in to five pens in a deep litter grower house consisting of 30 chicks each in a completely randomized design, and evaluated for a period of 16-weeks. Hatchability of fertile eggs was highest for LL (80.0 %), intermediate for LSR (68.6%) and lowest for SRSR (55.9%) chickens. The body weight (BW) of chicks at 2-weeks of age was 80.0, 76.3 and 61.5 g/bird for SRSR, LSR, and LL, respectively, the latter being the lowest (p<0.05). The respective BW at 8-weeks of age was 732, 587 and 451 g while at 18-weeks it was 1877, 1379 and 1070 g/bird and different from each other (p<0.05). During 3- to 8-weeks and 9- to 18-weeks growth periods, the LL chickens were inferior (p< 0.05) in feed intake (29.7 and 66.9 g/d/bird) whereas the SRSR chickens were superior (p< 0.05) in body weight gain (15.5 and 16.3 g/d/bird) and feed conversion ratio (2.67 and 5.35 g feed/ g gain), respectively. The mortality rate of chicken was not affected by genotypes. It can be concluded that the exotic blood of Sasso-RIR chicken had played a significant role in upgrading the growth rate and market weight of the local Normal Feathered chicken without adverse effect on hatchability, feed efficiency, and survival rate.


1997 ◽  
Vol 5 (4) ◽  
pp. 364-402
Author(s):  
Yvonne Sherwood

AbstractThis reading is about critical versions of texts and how they survive (or over-live) in the critical imagination. It looks at three readings of the book of Jonah, from 1550, 1781-2 and 1860, the first freezing the moment where Jonah is catapulted from the boat as the narrative's single defining moment, the second abstracting the image of Jonah looking out over Nineveh and snarling over God's change of mind, and the third zooming in on the body of the whale, its species, jawsize and body weight. In each case it is clear that the book of Jonah (and thus the Bible) is not hermetically sealed off from culture nor merely read against a cultural background, but that the "Bible" and "Society," text and context, are held in complex and reciprocal lines of force. The story of Jonah, the whale, God and the Ninevites is a stage where the transformed fears and anxieties of cultures are acted out, and gives back to society a transformed, idealised, picture of itself.


2018 ◽  
Vol 14 (1) ◽  
pp. 9-19
Author(s):  
Witold Rant ◽  
Marta Luisa Augustin ◽  
Aurelia Radzik-Rant ◽  
Emil Orłowski ◽  
Magdalena Bednarczyk ◽  
...  

The aim of the study was to compare the body weight gain and survival rate of lambs receiving a milk replacer as supplementary feed with lambs reared traditionally. The research was conducted in a flock of Polish Heath sheep. Of 244 lambs born, 42 lambs from multiple births were given supplementary feed. The lambs received the milk replacer until the 35th day of rearing. Body weight was monitored at birth and on days 28, 56 and 100 of life. Reproductive parameters and survival rate of lambs were derived from breeding documentation. There were no significant differences in the survival rate of lambs in the two groups, which was above 80%. The average birth weight of lambs reared traditionally and of those receiving the milk replacer was similar. During the entire rearing period, the lambs that required supplementary feeding grew more slowly. Twin lambs receiving the supplement and twin lambs reared traditionally had similar body weight and daily gains up to the 56th day of life, but the twin lambs receiving supplementary feed had a significantly lower body weight at day 100 and growth rate during the entire rearing period. The growth rate of triplets fed supplementary milk replacer was not significantly different from that of triplets reared traditionally in any period of the study.


2013 ◽  
Vol 15 (3) ◽  
pp. 22-30 ◽  
Author(s):  
O. P. Dolaychuk ◽  
◽  
R. S. Fedoruk ◽  
I. I. Kovalchuk ◽  
M. I. Khrabko ◽  
...  

2021 ◽  
Vol 37 ◽  
pp. 00005
Author(s):  
Leonid Kibkalo

The studies were carried out on three groups of superreplacement heifers of the Simmental breed, which were impregnated at the body weight of 360 kg. In the first group there were 32 unimpregnated heifers, in the second – 28 heifers, in the third – 30 heifers. The heifers of the first group after growing at the age of 18 months were taken for meat. 56 heifers gave the crop. The heifers were transferred for reproduction, and the bull-calves were put on cultivation and further fattening. To obtain well-fed animals, special diets were made so that the average daily gain was at least 650-700 g. After calving, the cows of the second group were taken for meat, and the cows of the third group were put on a 3-month fattening, and then taken for meat. The pre-slaughter weight of animals of the first group was 52 kg lower than that of animals of the second group and 104.7 kg lower than that of the third group. The difference was statistically significant at P>0.999. The interior fat mass was higher in the carcasses of cows of the second group by 1.1 and 3.2 kg compared to the animals of the third and first groups. The carcass yield was almost at the same level slightly ahead of the animals of the first group. Their slaughter yield was 60.1%, in other groups – 58.8-59.6%. The meatiness ratio was slightly higher in animals of the first group. The carcass weight of the first-calf heifers of the third group was 27.4 kg higher than that of the second group. Compared to the first group, this figure is higher by 52.6 kg. Specific carcass meat weight of the animals of the third group was 82.75%, which is higher than in the second and first groups by 0.41-0.85%, respectively. Heavy cowbanes weighing 32.6 and 40.4 kg were obtained from the animals. The skin of animals of the third group was 3.5-21.6 dm2 larger in area than of the animals of the second and first groups. Feeder bull-calves (n=27) had a removable mass of 532 kg. Heavy (282.3 kg) carcasses of good morphological composition were obtained from them. The sales revenue from first-calf heifers (second group) was higher than fattened heifers by 10.4%, and in comparison with fattened animals after calving (third group) it was lower by 9.4%. From the sale of one cow with a crop, 2.9 times more profit was received than from the sale of a heifer.


2014 ◽  
Vol 1 (2) ◽  
pp. 167
Author(s):  
Titis Amelia ◽  
Windiariani Lestari ◽  
Agus Nuryanto

Rasbora is a genus of freshwater fish of the family Cyprinidae. Three species belonging to this genus were found in Java Island; R. aprotaenia, R. lateristriata, and R. argyrotaenia. Rasbora inhabits clear running water with sandy and gravel bottom. This study aimed to determine the longitudinal distribution of Rasbora spp. based on their species richness and abundance at Banjaran River; to determine the population structure of Rasbora spp based on their body weight, standard and total length; and to identify interactions between physical-chemical factors with species richness and abundance of Rasbora spp. This research was a survey, with purposive random sampling technique applied to collect samples. The research divided the study sites into five stations based on their altitude and topography. The Cluster Analysis was calculated based on species richness and relative abundance of Rasbora spp., while the longitudinal distribution and the population structure were presented descriptively. The interaction between the physical-chemical factors and the species richness and abundance of Rasbora were analyzed using Principal Component Analysis (PCA). Thi study found two species of Rasbora, namely Rasbora argyrotaenia and Rasbora lateristriata with 80 and 2 individuals respectively. R. argyrotaenia was distributed longitudinally along Banjaran River. Meanwhile, R. latestriata was only found at the upstream. Based on the body weight, the population of R. argyrotaenia at the station three were found highest by the average body weight of 1–6 gr of a total 31 individuals. The maximum measurements of the standard length were observed at the station 3 with a range of diameter 4.0–5.9 cm of 30 individuals. The total length were also found at the station 3 with a range of measuremtnt 5.0–7.9 cm of 33 individuals. R. latestriata was found only two individual with body weights measured were 9 gr and 10 gr, the standard lengths were 7.6 and 8.5 cm, and the total lengths were 9.5 and 10.5 cm. The distribution of R. argyrotaenia was influenced mostly by pH, the speed of the water, and DO. The presence of R. lateristriata was influenced primarily by BOD and depth.


Author(s):  
Mohammed Hameed Abbas, Mohammed Ahmed Shwayel

This study was to study the effect of adding Lepidium sativum to the lamb diets of Awassi sheep. Nine male lambs (their age is 3 months old and their body weight is 19±0.5 Kg) were distributed randomly into 3 treatments (3 lambs per treatment). The coarse feed (hay) was provided freely to lambs, while the concentrated feed was provided based on 3% of the body weight. All treatments were fed on similar diet and differed only in the weight of seeds, where 7.5 g was added to the second treatment (T2) and 15 g of Garden Cress to the third treatment (T3) while the control treatment (T1) left without adding seeds. The experiment continued for 60 days. The results showed a significant increase in pH at 0 hour in treatments T2 and T3 with Garden Cress of 7.5 and 15 g respectively, but there was a significant decrease at 3 hours in treatment T3 and also at 6 hours in T2 and T3 as well. For total phenols there was a decrease at 6 hours in treatment T2.When adding Garden Cress to concentrated rations, it did not significantly affect N-NH3, but improved somewhat of rumen fermentation and microorganism’s numbers at 3 hours for T2 and T3 with Garden Cress of 7.5 and 15 g respectively. There was a significant increase in fatty acids at 6 hours in T2 and T3 while there was no significant effect at other times and treatments.  


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