scholarly journals Modeling the Emergence and Growth of Alligatorweed at Different Field Capacity Levels

2020 ◽  
Vol 38 ◽  
Author(s):  
T. AHMAD ◽  
A. TANVEER ◽  
M.A. NADEEM ◽  
M. YASEEN
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Growth Parameters ◽  
Field Capacity ◽  
Moisture Regime ◽  
Emergence Time ◽  
Submerged Soils ◽  
Sprouting Capacity ◽  
Dry Conditions ◽  
Survival And Growth

ABSTRACT: A study focusing on different field capacity levels was planned in the Weed Science Lab, Department of Agronomy, University of Agriculture Faisalabad. Fresh alligatorweed was harvested from the Agronomy fields and cuttings (2 cm length) were made from it. These cuttings were placed at 25%, 50%, 75% and 100% field capacity levels in pots for 25 days. The results of the experiments revealed that at all field capacity levels, fragments of alligatorweed were able to sprout and grow. Increased moisture levels significantly increased the emergence ability and survival of the alligatorweed plants upto a certain level. Compared with the control (25% FC), emergence time of the sprouts in the maximum moisture regime (100% of FC) decreased by 40% (12.94 days vs.7.17 days). By contrast, the survival rate of the fragments decreased by 60% (5 vs. 1.75) although survival and growth rate increased at first with 50% FC and 75% FC. Maximum sprouting and growth were found at 50% field capacity. Field capacity does affect the sprouting capacity of alligatorweed fragments but it has only a little influence on growth parameters. The results suggest that alligatorweed can sustain dry conditions to a great extent and also has the ability to sprout and grow in fully submerged soils.

scholarly journals Mangrove Rehabilitation at Alo Beach (Karakelang Islands, Talaud) Using Propagul of Rhizophora mucronata Lamk

Jurnal Wasian ◽  
2017 ◽  
Vol 4 (2) ◽  
pp. 69
Author(s):  
Ady Suryawan
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Rhizophora Mucronata ◽  
Randomized Design ◽  
Waves And Tides ◽  
Survival And Growth ◽  
Mangrove Rehabilitation ◽  
Main Factor

This study aimed to know the dynamic of survival rate and growth of Rhizophora mucronata Lamk which planted by using propagules at Alo Beach, Karakelang Island, Talaud. The study was conducted from June 2013 to April 2017, used a complete randomized design with 6 treatments i.e. K1, K2, K3, K4, K5, K6. The amount of propagules in every treatment were 100 pieces each. The parameter observed were characteristic of substrat, survival rate,height and diameter of the plant’s in age of 1.5 months and 48 months. The results showed that treatment had a significant effect on survival rate and growth of Rhizophora mucronata plants. The rehabilitation was categorized as success at 1.5 months old, but it was failed inthe 48 months. Beside waves and tides, low substrat nutrition became the main factor that affect the success of mangrove rehabilitation in Alo Beach.The K5 treatment has the highest survival and growth rate of the plant. The K5 treatment using pnematophore as brace, while planting without brace/K1 has lowest survival and growth rate since months old.Keywords: mangroves, rehabilitation, Rhizophora mucronata, Talaud

scholarly journals Effect of temperature on the survival and growth of freshwater prawns Macrobrachium borellii and Palaemonetes argentinus (Crustacea, Palaemonidae)

2011 ◽  
Vol 101 (3) ◽  
pp. 233-238 ◽  
Author(s):  
Marcela C. Montagna
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Anthropogenic Impact ◽  
Effect Of Temperature ◽  
Freshwater Environment ◽  
Intermolt Period ◽  
Different Temperatures ◽  
Cephalothorax Length ◽  
Survival And Growth ◽  
Size Increment

During the two-month rearing period, the effect of four water temperatures (15°C, 20°C, 25°C and 30°C) on survival rate, number of molts, and growth rate (molt increment and intermolt period) of juvenile Macrobrachium borellii Nobili, 1896 and Palaemonetes argentinus Nobili, 1901 prawns was evaluated in laboratory conditions. The two species showed some similarities in their both survival and growth pattern at different temperatures. The survival rate was highest at 20°C and 25°C, decreasing at the lowest temperature. The number of molts increased at higher temperatures, ranging the intermolt period from 22.2 days to 9.9 days, for M. borellii, and from 20.8 to 9.5 days for P. argentinus, corresponding those values to 15°C and 30°C, respectively. No difference between species was noted in the intermolt period. The size increment by molting increased significantly from 15°C to 25°C, whereas a reduction in the growth of prawns was observed at 30°C. Significant differences among temperatures were found in the slope of regressions between the size increment by molting and the cephalothorax length. M. borellii showed a significantly higher tolerance to elevated temperature and a faster growth (about twice at 25°C) than P. argentinus. These differences could provide M. borellii a competitive advantage for a better adaptation to the dynamic of freshwater environment, especially in areas with anthropogenic impact.

scholarly journals Effect of Alkalinity on Survival Rate and Growth of Siam Patin Catfish (Pangasius sp.) fry

2007 ◽  
Vol 4 (1) ◽  
pp. 53
Author(s):  
D. Djokosetiyanto ◽  
R.K. Dongoran ◽  
E. Supriyono
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Fish Larvae ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Survival And Growth

<p>This study was conducted to examine the effect of alkalinity on survival and growth of Siam patin catfish (<em>Pangasius</em> sp.).  Fish larvae were reared in aquaria in density of 4 fishes per liter.  Water alkalinity examined was 15 ppm CaCO<sub>3</sub> as control, and 25, 50, and 75 ppm CaCO<sub>3 </sub>as treatments.  During first 7 days, larvae were fed on nauplii <em>Artemia</em> sp. 4 times daily and continuing fed on <em>Tubifex</em> sp. for 23 days.  The results of study showed that higher survival rate was obtained in treatment 50 ppm CaCO<sub>3</sub> (94.16%).  Higher daily growth rate was also achieved by that treatment.</p> <p>Keywords: Siam patin catfish, <em>Pangasius</em>, Alkalinity, CaCO<sub>3</sub></p> <p><sub> </sub></p> <p>ABSTRAK</p> <p>Penelitian ini bertujuan untuk mengetahui pengaruh alkalinitas terhadap kelangsungan hidup dan pertumbuhan larva ikan patin Siam (<em>Pangasius</em> sp.).  Larva ikan patin dipelihara dalam akuarium dengan kepadatan 4 ekor/L.  Alkalinitas air yang digunakan adalah 15 ppm CaCO<sub>3</sub> sebagai kontrol, dan perlakuan 25, 50 serta 75 ppm CaCO<sub>3</sub>. Selama 7 hari pertama, pakan yang diberikan berupa naupli A<em>rtemia</em> sp. setiap 4 jam sekali dan diteruskan dengan cacing sutera (<em>Tubifex</em> sp.) selama 23 hari.  Hasil penelitian menunjukkan bahwa kelangsungan hidup larva tertinggi diperoleh pada perlakuan alkalinitas 50 ppm CaCO<sub>3 </sub> (94,16%).  Laju pertumbuhan harian tertinggi juga diperoleh pada perlakuan alkalinitas 50 ppm CaCO<sub>3 </sub>(6,65%).  </p> <p>Kata kunci: ikan patin Siam, <em>Pangasius</em>, Alkalinitas dan CaCO<sub>3</sub></p>

scholarly journals PEMELIHARAAN LARVA ABALON Haliotis squamata DENGAN PEMBERIAN JENIS PAKAN BERBEDA DALAM BENTUK TEPUNG

2018 ◽  
Vol 13 (1) ◽  
pp. 39
Author(s):  
Fitriyah Husnul Khotimah ◽  
Gusti Ngurah Permana ◽  
Ibnu Rusdi ◽  
Bambang Susanto
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Seed Production ◽  
Shell Length ◽  
Sea Water ◽  
Feed Solution ◽  
Larval Rearing ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Survival And Growth

Masalah utama yang umum terjadi pada produksi benih abalon adalah kematian yang tinggi (> 90%) setelah abalon menempel pada plate pemeliharaan. Penggunaan pakan dalam bentuk tepung untuk mengganti diatom sebagai pakan postlarva beberapa spesies ikan, udang, dan abalon sudah dilakukan. Penelitian ini bertujuan untuk mendapatkan jenis pakan dalam bentuk tepung yang sesuai dan efektif untuk mendukung sintasan dan pertumbuhan larva abalon Haliotis squamata. Percobaan terdiri atas lima perlakuan pakan pada pemeliharaan larva abalon yaitu tepung Spirulina sp., Ulva sp., Chaetoceros sp., Gracilaria sp., dan diatom (kontrol). Masing-masing perlakuan terdiri atas empat ulangan. Pakan berupa tepung yang digunakan pada masing-masing perlakuan, terlebih dahulu dicampur merata dengan larutan tepung agar (7,5 mg/mL dalam air laut; suhu 40°C) dengan konsentrasi tepung 40 mg/mL larutan agar. Pemberian pakan dilakukan setiap tiga hari dengan cara menyemprotkan larutan pakan pada permukaan plate pemeliharaan larva. Penelitian dilakukan selama 30 hari. Hasil penelitian menunjukkan bahwa sintasan larva abalon yang diberi pakan tepung Spirulina sp. paling tinggi dan berbeda nyata (P<0,05) dengan yang diberi diatom, tepung Chaetoceros sp., dan Ulva sp., yaitu masing-masing 81,49%; 79,25%; 76,57%; dan 76,46%; tetapi tidak berbeda nyata dengan yang diberi pakan tepung Gracilaria sp. 81,37% (P>0,05). Laju pertumbuhan harian panjang cangkang larva abalon tertinggi diperoleh pada larva yang diberi pakan tepung Gracilaria sp. (203,81 ± 1,23 µm/hari) dan Spirulina sp. (205,59 ± 1,71 µm/hari). Nilai laju pertumbuhan harian panjang cangkang larva abalon yang paling rendah dijumpai pada larva yang diberi pakan tepung Ulva sp. (146,07 ± 1,73 µm/hari).The most common problem in abalone seed production is the high mortality occurrence (> 90%) after postlarvae settlement to the rearing plates. The use of microparticle diets to replace the natural feed of postlarval has been performed on various species of fish, shrimp, and abalone. This research aims to determine the most effective and suitable powder-based feed to support the survival and growth of abalone Haliotis squamata larvae. The experiments consisted of five feed treatments, i.e., Spirulina sp., Ulva sp., Chaetoceros sp., and Gracilaria sp. Flour, and diatoms (as control). Each treatment had four replicates. The powder-based feed used in each treatment was firstly mixed with a solution of agar powder (7.5 mg/mL sea water, 40°C) with a concentration of 40 mg of flour/mL of agar solution. Feeding was done every three days by spraying the feed solution onto the surface of the larval rearing plate. The study was conducted for 30 days. The results showed that survival rate of abalone larvae fed with Spirulina sp. flour was the highest and significantly different (P<0.05) compared with those given diatoms, Chaetoceros sp. and Ulva sp. flours, which were 81.49%, 79.25%, 76.57%, and 76.46%, respectively, and not significantly different from those fed with Gracilaria sp. 81.37% (P>0.05). The highest daily growth rate of the shell length of abalone larvae was achieved by larvae fed with Gracilaria sp. (203.81 ± 1.23 ¼m/day) and Spirulina sp. flours (205.47 ± 1.71 µm/day). The lowest daily growth rate of shell length was found on abalone larvae fed with Ulva sp. flour (146.07 ± 1.73 µm/day).

scholarly journals Effect of Adding BIOM-S Probiotic on Survival and Growth Rate of Nile Tilapia (Oreochromis niloticus)

2018 ◽  
pp. 1-6
Author(s):  
Yuli Andriani ◽  
Taufik Ikhsan Kamil ◽  
Irfan Zidni ◽  
Iskandar . ◽  
Titin Herawati
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Specific Growth Rate ◽  
Nile Tilapia ◽  
Specific Growth ◽  
Culture Media ◽  
Control Treatment ◽  
Randomized Design ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Survival And Growth

This research was conducted in May-June 2017 in Hatchery Indoor Maksudi, Astanaanyar, Bandung. This research aims to find out the optimal BIOM-S probiotic on culture media of Nile tilapia, and the influence to survival rate and growth rate of Nile tilapia. This research was conducted by an experiment using Completely Randomized Design (CRD). This research consisted of five treatments and three replications, which were treatment A (control), treatment B (giving probiotic with 0,6 ml/L concentration), treatment C (giving probiotic with 0,8 ml/L concentration), treatment D (giving probiotic with ,0 ml/L concentration), and treatment E (giving probiotic with 1,2 ml/L concentration). The parameters in this research were the survival rate and specific growth rate. Survival rate and specific growth rate used data analysis with F test to find out the influence of each treatment. The concentration of optimal probiotic based on the results was 0.8 ml/L, it produced the highest survival rate for 81.67% and the specific growth rate for 0.039%.

scholarly journals Effect of Humisol on survival and growth of nursery grafted walnut (Juglans regia L.) plants

2013 ◽  
Vol 40 (No. 3) ◽  
pp. 111-118
Author(s):  
S.M. Paunović ◽  
R. Miletić ◽  
D. Janković ◽  
S. Janković ◽  
M. Mitrović
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Humic Acid ◽  
Foliar Application ◽  
Juglans Regia ◽  
Mineral Nutrients ◽  
First Year ◽  
Organic Fertiliser ◽  
Survival And Growth ◽  
Second Year

The effect of Humisol organic fertiliser (150 g humic acid/l + 20 g/l mineral nutrients) on plant survival and growth of five walnut cultivars grown over a period of two years in the nursery were evaluated. Walnut plants treated with Humisol at the total annual rate of 0.75 ml/plant had a significantly higher survival rate in the first year, greater height and diameter in both years, and a higher percentage of first-class plants at the end of the second year, as compared to untreated control plants. Soil application of Humisol led to better performance of nursery grafted plants, compared to foliar application. Nursery plants receiving 1.5 ml Humisol per year through both soil and foliar application exhibited the best performance in the parameters analysed. In the first year, a decrease in plant growth rate in all treatments was observed in August and September; in the second year, growth rate started to significantly decline in the second half of August. &nbsp; &nbsp;

scholarly journals Pengaruh Penambahan Sargassum sp. dan Inositol dalam Pakan terhadap Pertumbuhan dan Daya Tahan Juvenil Ikan Gurami (Osphronemus gouramy Lac.)

2017 ◽  
Vol 16 (2) ◽  
pp. 72
Author(s):  
Dwi Lestari ◽  
E. L. Widiastuti ◽  
N. Nurcahyani ◽  
G. N. Susanto
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Survival Rate ◽  
Body Length ◽  
Growth Parameters ◽  
Freshwater Fishes ◽  
The Body ◽  
Body Width ◽  
Treatment Groups ◽  
Commercial Feed

Gourami (Osphronemus gouramy Lac.) as one of the freshwater fishes, are easily to be cultured but slow in growth rate. One of the ways to enhance their growth rate is by feeding them with high nutritious food. Sargassum sp. and inositol are known compound able to stimulate the growth of some fishes. The study was conducted to determine the effect of Sargassum sp and inositol on commercial feed to the growth rate and survival of juvenile gouramy. The study was conducted from January to April 2015 in Aquatic Laboratory of Biology Department - University of Lampung. Completely randomized designed was used with 4 treatment groups and 5 replications. Anova and Tukey at 5% levels were applied to this study. The result indicated that addition of inositol and Sargassum sp on commercial food significantly affected the gourami growth parameters such as the body weight, body length, body width as well as juvenile gouramy spesific growth rate and their survival rate.

The effect of relative humidity on the survival and growth rate of the yellow mealworm larvae (Tenebrio molitor, Linnaeus 1758)

2021 ◽  
pp. 1-8
Author(s):  
N.S. Johnsen ◽  
J.L. Andersen ◽  
J. Offenberg
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Relative Humidity ◽  
Tenebrio Molitor ◽  
Larval Survival ◽  
Yellow Mealworm ◽  
Farming Community ◽  
Livestock Sector ◽  
Survival And Growth ◽  
Mealworm Larvae

The current livestock sector is a large contributor to the environmental challenges facing the world. To reduce the environmental impact of food production, a change of the sector is necessary. Entomophagy could be a step towards a more sustainable protein production. However, the insect farming community has a short history compared to conventional livestock, thus, it lacks knowledge of how a profitable mass production of insects is established. In this study we aimed to find the optimal relative humidity (RH) for production of larvae of a popular species for insect farming; the yellow mealworm, Tenebrio molitor. More specifically we tested the effect of a RH of 43, 51, 68, 75 and 84% on the survival rate, mass and length of T. molitor larvae, from hatching and two weeks forward. Control of RH was achieved using the saturated salt solution method, and the temperature was kept at 30 °C. Experiments were carried out over 12 weeks. The sample size was 100 larvae and eight replicates per treatment. Results showed that the RH had no effect on larval survival rate but had a significant effect on individual larvae mass and length after three weeks. Larval mass and length increased with humidity, and larvae reared at a RH of 84% were 1.96 times heavier and 1.31 times longer than larvae raised at 43%. Hence, for an industrial mass producer of T. molitor larvae, applying close to the optimal RH of 84% would likely result in an increased larvae size at harvest and a faster growth rate, ultimately leading to a higher yield.

scholarly journals Effectiveness of Different Bubble Size of Aeration to Survival and Growth Rate of Pangas Catfish Larvae, Pangasius nasutus

2020 ◽  
pp. 34-41
Author(s):  
Irfan Noer ◽  
Rafi Satriawan ◽  
. Iskandar ◽  
B. S. Ibnu Bangkit ◽  
. Rosidah
Keyword(s):  
Water Quality ◽  
Growth Rate ◽  
Survival Rate ◽  
Quality Standard ◽  
Randomized Design ◽  
Absolute Length ◽  
Survival And Growth ◽  
The Absolute ◽  
Bubble Sizes

This research was conducted at the fish fry center in Tasikmalaya City, Jl. Kadupugur No. 42 Kota Tasikmalaya. The research was done from November 2019 until February 2020. This research is carried out to determine the survival rate and growth of pangas catfish larvae up to the age of 22 days. Old with different bubble sizes of aeration stone the pangas catfish larvae used was 600 fingerlings that are spread evenly into 12 aquariums with four treatments each replicated three times using a completely randomized design (CRD). The parameters observed are survival rate, growth rate (weight and length), and water quality. The results showed that the aquarium with aerator ASB05 is the most effective treatment in influencing the productivity of pangas catfish larvae. The survival rate is 99.3%, the absolute length is 14.81mm and the absolute weight is 40.1 g. whereas the water quality of each treatment is still within the SNI quality standard (2000) with dissolved oxygen level is 5.40 mg/L.

scholarly journals Effects of different doses of skt-b vibrio probiotic bacteria addition on survival and growth rate of tiger shrimp (Penaeus monodon) larva

2010 ◽  
Vol 9 (1) ◽  
pp. 21 ◽  
Author(s):  
. Widanarni ◽  
M.A. Lidaenni ◽  
Dinamella Wahjuningrum
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Pathogenic Bacteria ◽  
Vibrio Harveyi ◽  
Penaeus Monodon ◽  
Probiotic Bacteria ◽  
Optimum Dose ◽  
Tiger Shrimp ◽  
Survival And Growth ◽  
Different Doses

<p>Probiotic bacteria has been widely used as biocontrol agents in tiger shrimp hatcheries.  <em>Vibrio </em>SKT-b is one of the probiotic bacteria candidates that could suppressed the growth of pathogenic bacteria <em>Vibrio harveyi </em>and could increase survival rate of tiger shrimp larva. This experiment was carried out to study the effects of probiotic bacteria SKT-b <em>Vibrio</em> addition at different doses on survival and growth rate of tiger shrimp larva.  Experiment was conducted with five treatments and three replications, consisted of SKT-b <em>Vibrio</em> probiotic bacteria addition at the doses of 10<sup>3</sup> CFU/ml, 10<sup>4 </sup>CFU/ml, 10<sup>5</sup> CFU/ml, and 10<sup>6</sup> CFU/ml and control (0 CFU/ml).  Results showed that optimum dose of probiotic bacteria for tiger shrimp was 10<sup>4 </sup>CFU/ml with a survival rate of 94.67%. However, the addition of probiotic bacteria at this particular dose did not significantly increase shrimp growth rate as compared with control.</p> <p>Key words: Probiotic bacteria, SKT-b <em>Vibrio</em>, doses, tiger shrimp larva</p> <p> </p> <p>ABSTRAK<br /> Bakteri probiotik telah banyak digunakan sebagai agen biokontrol dalam pembenihan udang windu.  <em>Vibrio </em>SKT-b merupakan salah satu jenis bakteri kandidat probiotik yang telah diuji dapat menekan pertumbuhan bakteri patogen <em>Vibrio harveyi </em>dan dapat meningkatkan kelangsungan hidup larva udang windu.  Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pemberian bakteri probiotik <em>Vibrio</em> SKT-b dengan dosis yang berbeda terhadap kelangsungan hidup dan pertumbuhan larva udang windu. Penelitian ini dilakukan dalam 5 perlakuan dengan masing-masing 3 ulangan, yaitu penambahan bakteri probiotik <em>Vibrio</em> SKT-b dengan dosis 10<sup>3</sup> CFU/ml, 10<sup>4 </sup>CFU/ml, 10<sup>5</sup> CFU/ml, dan 10<sup>6</sup> CFU/ml dan kontrol (0 CFU/ml).  Hasil penelitian menunjukkan bahwa dosis optimal untuk larva udang windu adalah 10<sup>4 </sup>CFU/ml dengan nilai kelangsungan hidup 94,67%. Namun, pemberian bakteri probiotik tersebut belum menghasilkan pertumbuhan yang berbeda nyata dengan kontrol.</p> <p>Kata kunci: Bakteri probiotik, <em>Vibrio</em> SKT-b, dosis, larva udang windu</p>

Sign in / Sign up

Export Citation Format

Share Document