scholarly journals The Rearing of Clown Loach (Chromobotia macracanthus) Larvae by Using Enriched Live Foods

2009 ◽  
Vol 8 (1) ◽  
pp. 11
Author(s):  
. Chumaidi ◽  
. Nurhidayat ◽  
A. Priyadi
Keyword(s):  
Growth Rate ◽  
Nutrient Enrichment ◽  
Fish Larvae ◽  
Average Length ◽  
Proximate Analysis ◽  
Live Food ◽  
Live Feed ◽  
Survival And Growth ◽  
Average Body Length ◽  
Average Body

<p>The enrichment of natural live  food with unsaturated fatty acid can increase survival and growth rate of fish larvae. The purpose of  this experiment was to know the effect of various natural live food with or without nutrient enrichment on survival and growth rate of clown loach (<em>Chromobotia macracanthus</em>) larvae.  The experiment was done indoor by using plastic jars filled 5 L water and aerated continuously.  Twenty clown loach larvae of four days old, 5.58 ± 0.12   mm in average length,  were stocked in plastic jars and  were reared for 28 days. The treatment were: a) <em>Artemia</em> nauplii as control;  b) rotifer without enrichment;  c) enriched rotifer, d) <em>Moina</em> nauplii without enrichment, and e) enriched <em>Moina</em> nauplii.  As enrichment agent, we used 200 mg of tuna eggs powder and 200 mg of baker's yeast which dissolved and  aerated in 2 L of water for one hour.  Proximate analysis for amino  and fatty acids content were done before the treatment, at 5 days old and at 32 days old (juvenile).  The result showed that higher survival (80.00%) and growth rate (average body length 12.80±1.85 mm) could be achieved by feeding clown loach larvae with enriched <em>Moina</em> nauplii.</p> <p>Keywords: clown loach larvae,  live feed, nutrient enrichment</p> <p> </p> <p>ABSTRAK</p> <p>Pengkayaan asam lemak tak jenuh dari pakan hidup dapat meningkatkan sintasan dan pertumbuhan larva ikan.  Penelitian dilakukan bertujuan untuk mengetahui pengaruh pakan hidup dengan atau  tanpa diperkaya nutrisinya terhadap sintasan dan pertumbuhan larva ikan botia (<em>Chromobotia macracanthus</em>).  Penelitian dilaksanakan di dalam ruangan tertutup menggunakan wadah plastik yang berisi media air 5 L serta diaerasi terus menerus.  Larva umur empat hari dengan panjang rata-rata 5,58 ± 0,12 mm ditebar sebanyak 20 ekor per wadah.  Pemeliharaan larva dilakukan selama 28 hari. Perlakuan perbedaan jenis pakan hidup dengan atau tanpa diperkaya, yaitu : a) naplii<em> Artemia</em> (kontrol), b) rotifer tanpa diperkaya nutrisinya, c) rotifer diperkaya nutrisinya, d) nauplii <em>Moina</em> tanpa diperkaya nutrisinya dan e) nauplii<em> Moina</em> diperkaya nutrisinya.  Pengkayaan pakan alami menggunakan tepung telur tuna dan ragi roti masing-masing 200 mg dalam 2 L media air yang diaerasi selama 1 jam. Analisis proksimat, asam amino dan asam lemak pakan alami  dan larva umur empat hari dilakukan sebelum penelitian dan juvenil botia 32 hari dianalisis pula.  Hasil penelitian menunjukkan bahwa sintasan (80,00%) dan pertumbuhan (panjang mutlak 12,90 ± 1,85 mm) yang tinggi dapat diperoleh dengan memberikan nauplii <em>Moina</em> yang diperkaya pada larva botia</p> <p>Kata kunci: larva ikan botia, pakan alami, pengkayaan nutrisi</p>

A Method of Calculating Body Lengths from Otolith Measurements for Pacific Halibut and its Application to Portlock-Albatross Grounds Data between 1935 and 1957

1962 ◽  
Vol 19 (2) ◽  
pp. 339-362 ◽  
Author(s):  
G. Morris Southward
Keyword(s):  
Growth Rate ◽  
Body Length ◽  
Average Length ◽  
Growth Patterns ◽  
Commercial Fishery ◽  
Young Fish ◽  
Pacific Halibut ◽  
Average Body Length ◽  
Average Body

A change in growth rate of the halibut from the Portlock-Albatross grounds has occurred since the early 1930's. It is possible to measure this change in growth by studying the otoliths of fish taken by the commercial fishery in subsequent years. The calculation of body lengths from otolith measurements has provided a technique of reconstructing the growth patterns of each year-class. This method has been tested using the otoliths of recovered tagged halibut. The percentage deviations from average body length at each age demonstrate an increase in average length with time over the period 1920–1956. This increase is not exhibited among young fish of ages 1 through 4; it starts approximately with age 5 and continues throughout the older ages, where it is pronounced.

scholarly journals PERGANTIAN PAKAN TERHADAP PERTUMBUHAN DAN KELANGSUNGAN HIDUP LARVA IKAN GURAMI (Osphronemus gouramy) TURN FEED ON THE GROWTH AND SURVIVAL OF FISH LARVAE CARP (Osphronemus gouramy)

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Eka Indah Raharjo ◽  
Hastiadi Hasan ◽  
Darmawan .
Keyword(s):  
Growth Rate ◽  
Specific Growth Rate ◽  
Specific Growth ◽  
Fish Larvae ◽  
Average Length ◽  
Natural Food ◽  
Growth And Survival ◽  
Quality Of Water ◽  
Randomized Design ◽  
Absolute Growth

ABSTRAK Penelitian bertujuan untuk mengetahui pergantian pakan. penelitian menggunakan Rancangan Acak Lengkap yang terdiri dari 5 perlakuan dan 3 ulangan. Susunan perlakuan adalah sebagai berikut : Perlakuan A : eguchi 10 hari dan infusoria 10 hari, Perlakuan B : infusoria 10 hari dan eguchi 10 hari, Perlakuan C : Eguchi 20 hari, Perlakuan D : Infusoria 20 hari dan Perlakuan E : campuran eguchi 50% dan Infusoria 50% selama 20 hari. Penelitian ini dilakukan selama 20 hari untuk mengetahui laju pertumbuhan spesifik bobot, laju pertumbuhan mutlak panjang, kelangsungan hidup dan kualitas air sebagai data penunjang. Hasil penelitian menunjukkan pergantian pakan alami dengan pakan buatan menghasilkan respon yang baik dalam pertumbuhan larva ikan gurami. Pergantian pakan buatan (eguchi) dengan pakan alami (infusoria)(perlakuan A) memberikan hasil terbaik dengan rata – rata laju pertumbuhan spesifik bobot 5,3256%, rata – rata laju pertumbuhan mutlak panjang 5.70 mm dan rata – rata kelangsungan hidup 78.89%.  Kata Kunci : Infusoria, Eguchi, Larva Ikan Gurami, Laju Pertumbuhan ABSTRACT Research was aimed to determine the change of feed. research using completely randomized design consisting of 5 treatments and 3 replications. The composition of the treatment is as follows: Treatment A: Eguchi 10 days and infusoria 10 days, Treatment B: infusoria 10 days and Eguchi 10 days, Treatment C: Eguchi 20 days, Treatment D: Infusoria 20 days and Treatment E: a mixture of Eguchi 50% and infusoria 50% for 20 days. This research was conducted for 20 days to determine the specific growth rate weight, the absolute growth rate of long survival and quality of water as supporting data. The results showed turnover natural feed with artificial feed to produce a good response in the growth of larval carp. Substitution of artificial feed (Eguchi) with natural food (infusoria) (treatment A) gives the best results with the average - average specific growth rate 5.3256% weighted, averageabsolute growth rate, average length of 5.70 mm and survival rate 78.89% . Keywords : Infusoria, Eguchi, Fish larvae Gurame, Growth Rate

scholarly journals The Effect of Different Thyroxine Hormone (T4) Concentration on The Growth, Survival, and Pigment Development of Pink Zebra Fish Larvae (Brachydanio reiro)

Omni-Akuatika ◽  
2018 ◽  
Vol 14 (2) ◽  
Author(s):  
Arifianto Heraedi ◽  
Slamet Budi Prayitno ◽  
Tristiana Yuniarti
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Specific Growth Rate ◽  
Specific Growth ◽  
Fish Larvae ◽  
Average Length ◽  
Average Weight ◽  
Zebra Fish ◽  
Total Length ◽  
Absolute Growth

The thyroxin hormone plays an important role in the process of metabolism, yolk sac absorbsion, and growth of fish. The aims of this research were to observe the effect of various concentration of thyroxin (T4) on the absolute growth weight, total length, survival rate, and pigment development of pink zebra fish larvae (Brachydanio reiro ) after being reared 42 days. The pink zebra fish larvae at 4 day age with the average weight of  0,002 – 0,003g and average length of ± 3.10 – 3.43 mm were immersed at various concentration of T4 for 24 hours. Prior the treatment fish larvae were dipped into 1 ppt salinity for 2 minutes then transferred into 1 Liter, 1ppt saline and various T4 in plastic bags. The thyroxin concentrations were A (0 mg / L); B (0.05 mg / L); C (0.10 mg / L) and D (0.15 mg / L) respectively. The stocking density was 40 fish/L. After that they were transferred into aquariums and reared for 42 days. Completely Randomized Design (RAL) with four treatments and three replications were used. The variables observed were absolute and specific growth, total length, survival rate and hue degree. The results showed that the thyroxin hormone had significant effect on absolute growth weight, total length and specific growth rate.  The dosage 0.1 mg/L was the best treatment on absolute growth, total length, and specific growth rate. Whilee the survival rate showed no significant differences across the treatments. Treatment C also demonstrated the best ppigment development (14.60 + 0.36º hue) compared to others.

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 Variability of size characteristics and survival of the nauplii of Crimean brine shrimp Artemia spp. (Branchiopoda: Anostraca) feeding on different species of microalgae

2019 ◽  
Vol 4 (1) ◽  
pp. 91-99
Author(s):  
D. Yu. Smirnov ◽  
L. O. Aganesova ◽  
A. N. Khanaychenko
Keyword(s):  
Marine Fish ◽  
Brine Shrimp ◽  
Fish Larvae ◽  
Average Length ◽  
Isochrysis Galbana ◽  
Average Diameter ◽  
Live Food ◽  
Essential Components ◽  
Size Growth ◽  
Artemia Cysts

Nauplii of brine shrimps Artemia spp. (Branchiopod: Anostraca) are one of the main species of live food used in marine fish larviculture. Specialized formulated enrichments or microalgae containing essential components for fish larvae are routinely used for improvement of biochemical composition of Artemia. Size, growth rate and survival of nauplii and metanauplii are important when Artemia is used as a live food. The goal of this study was to carry out comparative analysis of size characteristics and survival of metanauplii of the Crimean brine shrimp (produced by “Artemia cysts” company) feeding on different species of microalgae. Nauplii were hatched in accordance with the generally accepted procedure. Microalgae of different taxons – Isochrysis galbana, Prorocentrum micans, Gymnodinium wulffii, Prorocentrum cordatum, Tetraselmis suecica, Phaeodactylum tricornutum – were used for feeding metanauplii. The average diameter of dry Artemia cysts was 0.230 mm. The average length and width of nauplii were 0.473 and 0.150 mm, respectively. The average length of 1-day old metanauplii fed on T. suesica [(0,698 ± 0,014) mm] was significantly less than that of 1-day metanauplii fed on I. galbana, P. micans, G. wulfii, and Ph. tricornutum (P < 0.05). The average length and width of the 2-day and 3-days old metanauplii fed on I. galbana (1.19 and 0.324; 1.53 and 0.47 mm, respectively) were significantly larger than those of metanauplii fed on Ph. tricornutum, T. suesica, P. micans, and P. cordatum. Metanauplii fed on P. cordatum were significantly smaller than those fed on other diets. The survival of metanauplii fed on P. cordatum, P. micans, and T. suecica was the highest (above 95 %). The combination of the smallest sizes and highest survival rate of metanauplii fed on P. cordatum (microalgae with high DHA/EPA content) assumes the use on metanauplii as an experimental live food for marine fish larvae.

scholarly journals Response of Scenedesmus quadricauda (Chlorophyceae) to Salt Stress Considering Nutrient Enrichment and Intracellular Proline Accumulation

2020 ◽  
Vol 17 (10) ◽  
pp. 3624 ◽  
Author(s):  
Myung-Hwan Park ◽  
Chae-Hong Park ◽  
Yeon Bo Sim ◽  
Soon-Jin Hwang
Keyword(s):  
Growth Rate ◽  
Salt Stress ◽  
Nutrient Enrichment ◽  
Growth Response ◽  
N:P Ratio ◽  
Proline Accumulation ◽  
Scenedesmus Quadricauda ◽  
Survival And Growth ◽  
Four Levels ◽  
Dissolved Salts

Aquatic organisms are exposed to a wide range of salinity, which could critically affect their survival and growth. However, their survival and growth response to salinity stress remain unclear. This study evaluates the growth response and intracellular proline accumulation of green algae, Scenedesmus quadricauda, isolated from brackish water, against dissolved salts stress with N and P enrichment. We tested a hypothesis that nutrient enrichment can relieve the dissolved salts stress of algae by accumulating intracellular proline, thereby improving survival and growth. Four levels of salinity (0, 3, 6, 12 psu) were experimentally manipulated with four levels of nutrient stoichiometry (N:P ratio = 2, 5, 10, 20) at constant N (1 mgN/L) or P levels (0.05 and 0.5 mgP/L). In each set of experiments, growth rate and intracellular proline content were measured in triplicate. The highest level of salinity inhibited the growth rate of S. quadricauda, regardless of the nutrient levels. However, with nutrient enrichment, the alga showed tolerance to dissolved salts, reflecting intracellular proline synthesis. Proline accumulation was most prominent at the highest salinity level, and its maximum value appeared at the highest N:P ratio (i.e., highest N level) in all salinity treatments, regardless of P levels. Therefore, the effects of P and N on algal response to salt stress differ.

scholarly journals Application of Live Feeds in the Freshwater Ornamental Fish Larvae of Puntius Dorsalis (Jerdon)

2005 ◽  
Vol 4 (2) ◽  
pp. 1-7
Author(s):  
B. Victor ◽  
M. Mannar Mannan ◽  
M. Maridass ◽  
P. Murphy Alexander ◽  
J. M. A. P. Arachi
Keyword(s):  
Growth Rate ◽  
Specific Growth ◽  
Fish Larvae ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Ornamental Fish ◽  
Mosquito Larvae ◽  
Larval Fishes ◽  
Live Feed ◽  
Live Feeds

Feeding experiment conducted under laboratory conditions, to determine the suitability of live feed for the larvae of ornamental fish Puntius dorsalis, shows the increase of specific growth rate and weight gain when they were fed with mosquito larvae( 3.284 and 8.04%/day),chironomus larvae(3.308 and 6.24%/day),chopped earthworm (2.618 and 4.39%/day). The maximum growth rate,0.614g was observed in mosquito larvae feed followed by chironomus larvae(0.522 g),chopped earthworm(0.411g) and plankton(0.405g). The present study indicates that mosquito larvae could be used as a suitable live feed for feeding Puntius dorsalis larval fishes.

scholarly journals Assessment of the impact of the timing of first feeding with live and formulated feeds on the survival and growth of larvae Atlantic sturgeon (Acipenser oxyrinchus Mitchill) in recirculating systems

2018 ◽  
Vol 26 (2) ◽  
pp. 111-120
Author(s):  
Iwona Piotrowska ◽  
Bożena Szczepkowska ◽  
Mirosław Szczepkowski ◽  
Michał Kozłowski
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Specific Growth ◽  
Atlantic Sturgeon ◽  
Final Body Weight ◽  
Live Feed ◽  
First Feeding ◽  
Survival And Growth ◽  
Formulated Feed ◽  
Acipenser Oxyrinchus

Abstract The aim of the study was to determine the optimum timing of the first feeding of live and formulated feeds and its impact on the survival and growth of larval Atlantic sturgeon, Acipenser oxyrinchus Mitchill, reared in recirculating systems. The first experiment compared the rearing effects on larvae that were provided live feed (Artemia sp.) at first feeding on 6, 9, and 12 days post hatch (DPH). The timing of the first feeding with live feed had an impact on the specific growth rate, the final body weight, and the coefficient of body weight variation. The most advantageous rearing parameter values were noted in the group given their first feeding 9 DPH (P < 0.05). The second experiment compared the results of rearing larvae that were first given formulated feed on days 20, 25, and 30 post hatch. The highest specific growth rate and final body weight were obtained by the group of fish given their first feeding of formulated feed on day 20 post hatch (P < 0.05). The timing of the first feeding did not impact fish survival, which was above 76% (P > 0.05) in all groups. The results of the experiment indicate that the optimum timing of Atlantic sturgeon first feeding on live feed was nine DPH, and on formulated feed it was 20 DPH.

scholarly journals PENGAMATAN PENDAHULUAN OVARIUM BANDIKUT (Echymipera kalubu)

2018 ◽  
Vol 8 (2) ◽  
pp. 83
Author(s):  
Fahry Rafli ◽  
Angel N. Tethool ◽  
Freddy Pattiselanno
Keyword(s):  
Average Length ◽  
Reproductive Organs ◽  
Descriptive Statistics ◽  
Average Weight ◽  
Physical Description ◽  
Surgical Tool ◽  
Average Body Length ◽  
Average Body ◽  
Female Reproductive Organs ◽  
Average Body Weight

The study aimed to determine the size and physical description (location, shape, colour and texture) ovarian of Echymipera kalubu. Study was conducted in 3 months from June to September 2017. Three female E. kalubu with an average body weight 399±97.32g and average body length 21.67±5.51cm were used in this study. Sample of bandicoots were dissected using a surgical tool and then measured using measuring tester and analytic scales. Descriptive statistics was used to analyse the data. The results showed that average length of female reproductive organs of E. kalubu was 11,00±0,87 cm (right) and 11,03±0,83 cm (left); average weight of ovarian was 0,01±0,0048 g (right) and 0,02±0,0006 g (left). This study also showed that characteristics of ovarian were in common with other polytocus animals.

scholarly journals Bio-Ecological Research of Lily Leaf Beetle Lilioceris lilii Scopoli (Coleoptera: Chrysomelidae) in Bosnia and Herzegovina

2017 ◽  
Vol 20 (2) ◽  
pp. 55 ◽  
Author(s):  
Mirjana Brzica
Keyword(s):  
Bosnia And Herzegovina ◽  
Average Length ◽  
Pupal Stage ◽  
Leaf Beetle ◽  
Field Conditions ◽  
Average Width ◽  
Lilioceris Lilii ◽  
Lily Leaf Beetle ◽  
Average Body Length ◽  
Average Body

In the present study some bio-ecological characteristics of Lilioceris lilii in Bosnia and Herzegovina are presented. The insect’s presence was confirmed in the majority of the researched locations in Bosnia and Herzegovina. The average body length of L. lilii was 7.64 mm (7.025 mm for the males while 8.106 mm for the females) and the average body width 3.75 mm. The average length of a fully developed larva was 6.36 mm, and the average width was 2.69 mm. In terms of the cocoon, the average length was 8.83 mm and its width was 5.82 mm. Duration of embryonic development under field conditions was 8.5 days in average. The average duration of larval development (4 instars) was 16 days and the pupal stage lasted approximately 18 days. Lilioceris lilii retreated into winter quiescence at the beginning of autumn, thereof completes one generation per year. In the area of Sarajevo in field conditions the number of the laid eggs per female was 130 in average. The insect undergoes its entire development at the Asian and Oriental species of lily, on all the above-ground parts of the plants. Lilium candidum lily species that was present in all home gardens in the observed areas was the major host of the L. lilii. Experimentation with Aloae vera proved that this species was not a host of L. lilii.

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