scholarly journals Tingkat keragaman ukuran benih ikan lele Clarias sp. yang diberi Artemia dengan periode yang berbeda

2016 ◽  
Vol 15 (2) ◽  
pp. 156
Author(s):  
Dedi Jusadi ◽  
Farida Fitriani ◽  
Julie Ekasari ◽  
Apriana Vinasyiam
Keyword(s):  
Survival Rate ◽  
Growth Performance ◽  
Size Distribution ◽  
Body Length ◽  
Size Variation ◽  
Culture Period ◽  
Medium Size ◽  
Feeding Period ◽  
Average Body Length ◽  
Average Body

<p class="NoParagraphStyle"><strong>ABSTRACT</strong></p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">This research was conducted to evaluate the effect of different <em>Artemia</em> feeding period on the size variation of catfish <em>Clarias</em> sp. larvae. One thousand two days post hatched larvae with an average body length of 0.7±0.03 cm were randomly distributed into 25 L round plastic tanks. The treatment conducted for 13 days with four treatment; without<em> Artemia</em>, given <em>Artemia</em> 1, 2, or 3 days in the first culture period. The results showed that 15 days old fish has the same survival rate in all treatments; and has two size distribution i.e. the small size (S) and medium size (M). Increasingly the period of administration of <em>Artemia</em>, the percentage of the amount of M-size fish increases, thereby giving <em>Artemia</em> were able to increase growth of larvae. Feeding catfish with <em>Artemia</em> for two days has shown producing better growth.</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Keywords: catfish, <em>Artemia</em>, size variation, growth performance</p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle"><strong> </strong></p><p class="NoParagraphStyle"><strong>ABSTRAK</strong></p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Penelitian ini dilakukan untuk mengevaluasi pengaruh perbedaan periode pemberian pakan <em>Artemia </em>terhadap kinerja pertumbuhan larva ikan lele <em>Clarias </em>sp. Seribu ekor larva lele yang berumur dua hari dengan panjang rata-rata 0,7±0,03 cm ditebar dalam wadah dengan volume air 25 L. Budidaya ikan dilakukan selama 13 hari dengan empat perlakuan, yaitu perlakuan tanpa pemberian <em>Artemia</em>, pemberian <em>Artemia</em> selama satu, dua, atau tiga hari di awal masa budidaya. Hasil penelitian menunjukkan bahwa ikan umur 15 hari memiliki sintasan yang sama di semua perlakuan, serta memiliki dua sebaran ukuran, yakni ukuran kecil (S) dan ukuran sedang (M). Semakin lama periode pemberian <em>Artemia</em>, persentase jumlah ikan ukuran M meningkat, sehingga pemberian <em>Artemia</em> pada larva ikan lele mampu meningkatkan pertumbuhan. Pemberian <em>Artemia</em> selama dua hari memberikan pertumbuhan yang lebih baik.</p><p class="NoParagraphStyle"> </p><p>Kata kunci: ikan lele, <em>Artemia</em>, keragaman ukuran, kinerja pertumbuhan</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 Effects of rotifer densities on larval performance of spotted scat (Scatophagus argus)

2021 ◽  
Vol 13 (Aquaculture) ◽  
pp. 37-43
Author(s):  
Quoc Viet Le ◽  
Van Khanh Ly ◽  
Thi My Han Duong ◽  
Nguyen Duy Khoa Tran ◽  
Tomonari Kotani ◽  
...  
Keyword(s):  
Survival Rate ◽  
Growth Performance ◽  
Body Length ◽  
Fish Larvae ◽  
Larval Growth ◽  
Larval Performance ◽  
Scatophagus Argus ◽  
Wide Range ◽  
Significant Difference ◽  
Set Up

This study is aimed to determine the optimal rotifer feeding density for larviculture of spotted scat fish (Scatophagus argus). The experiment was randomly set up in triplicate with 5 treatments including 5, 10, 15, 20 and 25 rotifers/mL. The fish larvae with the initial body length and depth at 2,343 ± 110 µm and 812 ± 85µm, respectively, were stocked in 250-L tanks at 10 larva/L of density and 25‰ of salinity. After 21 days of rearing, the results showed that the larval growth were at 243 – 330 µm/day of DLG and 5.50 – 6.70 %/day of SGRL; 131 –204 µm/day of DDG and 7.20 – 8.93 %/day of SGRD, but no significant difference in larval growth performance was recorded among treatments (p>0.05). However, the highest survival rate of fish larvae (35.4-48.1%) was recorded in the treatments fed 5 and 10 rotifers/mL and was significantly higher than other treatments (p<0.05). The data demonstrated that spotted scat larvae fed effectively across as wide range of rotifer densities and the range at 5-10 rotifers/mL were suggested for the husbandry practices.

scholarly journals SOME DATA ON BIOLOGY AND FISHERY OF ICEFISH SALANGICHTHYS MICRODON IN PETER THE GREAT BAY (JAPAN SEA)

2019 ◽  
Vol 196 ◽  
pp. 90-100
Author(s):  
L. N. Kim
Keyword(s):  
Body Length ◽  
Peter The Great Bay ◽  
Japan Sea ◽  
The Body ◽  
Spawning Period ◽  
Amur Bay ◽  
Peter The Great ◽  
Great Bay ◽  
Average Body Length ◽  
Average Body

Within Peter the Great Bay, common icefish Salangichthys microdon forms commercially valuable aggregations in two areas of the Amur Bay and in one area of the Ussuri Bay. It spawns in the internal estuaries of the rivers entered to the bays and in the external estuarine zones in the tops of the bays, mostly on small pebble grounds from late April to late May and feeds in the bays waters. Data on its size and weight composition were obtained in 2017–2018 both from the Amur Bay (for spawning period) and from the Ussuri Bay (for feeding period). During the spawning (on May 6 and May 18), the body length was 59–90 mm, on average 74.9 mm, and the weight was about 750 mg; sex ratio males : females was 1.0 : 0.8. During the feeding, the average body length was 66.8 mm.

Godzilliognomus schrami, a new species of Remipedia (Crustacea) from Eleuthera, Bahamas

Zootaxa ◽  
2010 ◽  
Vol 2491 (1) ◽  
pp. 61 ◽  
Author(s):  
THOMAS M. ILIFFE ◽  
TINA OTTEN ◽  
STEFAN KOENEMANN
Keyword(s):  
New Species ◽  
Body Length ◽  
The Other ◽  
Average Body Length ◽  
A New Species ◽  
Average Body

Godzilliognomus schrami, a new species of the crustacean class Remipedia, Yager, 1981 is the second species assigned to the genus. The new species, with an average body length of 6.8 mm, was collected from an anchialine cave on the Bahamian island of Eleuthera. Godzilliognomus schrami can be distinguished from the other species in the genus, Godzilliognomus frondosus Yager, 1989 by narrower and less trapezoidal tergites, frontal filaments that differ regarding the shape and insertion of the medial process, and dorsal antennular rami composed of only ten segments.

scholarly journals Growth performance of pearl goldfish juvenile carassius auratus cultured in 3 ppt salinity with different exposure time of electric field

2015 ◽  
Vol 10 (2) ◽  
pp. 165
Author(s):  
Kukuh Nirmala ◽  
Rizky Armansyah ◽  
Agus Priyadi
Keyword(s):  
Growth Rate ◽  
Electric Field ◽  
Growth Performance ◽  
Electric Fields ◽  
Body Length ◽  
Exposure Time ◽  
Carassius Auratus ◽  
The Body ◽  
Salinity Water ◽  
Average Body

<p>ABSTRACT</p><p><br />Growth rate of pearl goldfish juvenile Carassius auratus relatively slow to reach market size which will take approximately three months. To accelerate its growth can be done by providing exposure of the fish to low-power electric fields (10 V) via 3 ppt salinity water, with the goal of providing the close isoosmotic conditions, and also to streamline the flow of electricity from the electrodes to the body of the fish. This study aims to calculate the survival and growth rate of pearl goldfish juvenile of S sizes (2‒4 cm of body length) which were maintained at 3 ppt salinity water and treated by different exposure time of electric field (zero, two, four, and six minutes before feeding) with 10 volt electric power. Fish were cultured at a density of 2 fish/L in the (20×30×20 cm3) aquaria in volume of 6 L of water. Test fish had an average body length of 4.11±0.05 cm and the average body weight of 2.89±0.05 g. Exposure time of electric field were zero, two, four, and six minutes before the fish are fed, performed every day as much as three times i.e. morning, afternoon, and evening. The research design used was completely randomized design with four treatments, namely 0, 2, 4, and 6 (time for exposure is zero/control, two, four, and six minute) with three replications. The results show test fishes exposed to 10 volt electrical field for zero, two, four, and six minutes, have no significant effect on survival rate (P&gt;0.05). For growth performance, four minute exposure treatment gives the best results compared to controls (P&lt;0.05), supported by an increase in the percentage of the ratio of gut length to body length of the fish and higher feed efficiency.<br />Keywords: long exposure to the electric field, growth performance, pearl goldfish</p><p><br />ABSTRAK</p><p><br />Pertumbuhan benih ikan hias maskoki mutiara Carassius auratus relatif lambat, karena untuk mencapai ukuran jual memerlukan waktu sekitar tiga bulan. Untuk mempercepat pertumbuhannya dapat dilakukan dengan pemberian paparan medan listrik berdaya rendah (10 V) ke air media budidaya yang dinaikkan salinitasnya menjadi 3 ppt, dengan tujuan memberikan kondisi mendekati isoosmotik, dan juga untuk mengefektifkan arus listrik dari elektroda ke tubuh ikan. Penelitian ini bertujuan untuk menghitung tingkat kelangsungan hidup dan pertumbuhan benih ikan maskoki mutiara ukuran S (2‒4 cm) yang dipelihara pada media bersalinitas 3 ppt yang diberi perlakuan lama waktu pemaparan medan listrik (nol, dua, empat, dan enam menit sebelum ikan diberi pakan) dengan daya 10 volt. Ikan dipelihara dengan kepadatan 2 ekor/L dalam akuarium berukuran 20×30×20 cm3 dengan volume air 6 L. Ikan uji yang digunakan memiliki panjang rata-rata 4,11±0,05 cm dan bobot rata-rata 2,89±0,05 g/ekor. Pemberian paparan medan listrik dilakukan selama nol, dua, empat, dan enam menit sebelum ikan diberi pakan, dilakukan setiap hari sebanyak tiga kali yaitu pagi, siang, dan sore hari. Rancangan penelitian terdiri atas empat perlakuan, yaitu 0, 2, 4, dan 6 (lama paparan nol/kontrol, dua, empat, dan enam menit) yang diulang masing-masing tiga kali ulangan. Hasil pemaparan arus listrik 10 volt selama nol, dua, empat, dan enam menit, tidak memberikan pengaruh yang nyata pada kelangsungan hidup (p&gt;0,05). Untuk kinerja pertumbuhan, perlakuan paparan empat menit memberikan hasil yang terbaik dibandingkan kontrol (p&lt;0,05), didukung oleh peningkatan persentase nilai rasio panjang usus terhadap panjang tubuh ikan serta nilai efisiensi pakan yang lebih tinggi.</p><p><br />Kata kunci: lama paparan medan listrik, kinerja pertumbuhan, ikan maskoki mutiara</p>

Morphometric and carcass characteristics of Jaunpuri breed of goats

2017 ◽  
Vol 36 (02) ◽  
Author(s):  
Dharmendra Kumar ◽  
V. K. Singh ◽  
Alok Kumar Yadav ◽  
Amit Kumar Jha ◽  
Jitendra Singh
Keyword(s):  
Body Length ◽  
Age Groups ◽  
Uttar Pradesh ◽  
Carcass Characteristics ◽  
Mean Value ◽  
Average Height ◽  
Body Weights ◽  
The Mean ◽  
Average Body Length ◽  
Average Body

The present study was undertaken to observe morphometric and carcass characteristics of Jaunpuri goat. The survey plan was conducted in two districts viz. Allahabad and Jaunpur of its native tracts in Uttar Pradesh. The overall average body weights of male goats of the age groups 0-3, 3-6, 6-9, 9-12 and above12 months were observed as 5.50±0.327, 12.07±0.598, 19.62±0.738, 21.92±0.571 and 30.44±0.978 kg respectively. The overall average body length of male goats of the age groups 0-3, 3-6, 6-9, 9-12, and above 12 months were observed as 38.63±1.762, 48.55±2.090, 58.77±0.652, 67.23±0.777 and 67.56±0.747 cm. The overall average height of male goats of the age groups 0-3, 3-6, 6-9, 9-12 and above 12 months were observed as 41.63±1.945, 53.36±2.094, 66.23±1.051, 72.69±0.664 and 72.31±0.893 cm, respectively. The corresponding values for females were 44.24±0.825, 50.38±0.836, 62.81±0.466, 69.14±0.387 and 69.00±0.691 cm. The mean value of horn size of male goats of the age groups 0-3, 3-6, 6-9, 9-12 and above 12 months were observed as 1.94±0.346, 2.73±0.449, 5.54±0.584,5.85±0.696 and 7.56±0.381 cm respectively. The respective averages for females were 1.77±0.171, 2.60±0.173, 4.94±0.322, 6.53±0.424 and 6.79±0.421 cm. The results revealed no significant differences in average slaughter weight between the sexes of the same age groups but it varied significantly (P less than 0.05) in different age groups like 6, 9 and 12 month of age.

ABNORMALITIES IN SECOND-STAGE LARVAE OF HETERODERA TRIFOLII GOFFART, 1932 (NEMATODA:HETERODERIDAE)

1960 ◽  
Vol 38 (4) ◽  
pp. 777-779
Author(s):  
Roland H. Mulvey
Keyword(s):  
Sugar Beet ◽  
Body Length ◽  
Second Generation ◽  
Chromosome Complement ◽  
Mixed Population ◽  
Second Stage ◽  
Tail Development ◽  
Different Types ◽  
Average Body Length ◽  
Average Body

Second-generation females of a cyst-forming nematode, Heterodera trifolii Goffart, 1932, from a mixed population of this species and the sugar-beet nematode, H. schachtii Schmidt, 1871, produced small, normal, giant, and abnormal second-stage larvae. The giant larvae averaged 670 μ in length, while the small larvae had an average body length of 404 μ. Abnormalities in the larvae occurred mostly in the tail development. It is suggested that the sperm of H. schachtii may have affected the normal chromosome complement of the H. trifolii oöcytes during oögenesis and was thereby responsible for the production of the different types of larvae recorded.

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