scholarly journals OPTIMUM DENSITY OF Nannochloropsis sp. FOR MASS SCALE CORAL TROUT, Plectropomus leopardus (Lacepède, 1802)

2021 ◽  
Vol 15 (2) ◽  
pp. 51
Author(s):  
Yasmina Nirmala Asih ◽  
Sudewi Sudewi ◽  
Afifah Nasukha ◽  
Daniar Kusumawati ◽  
Ketut Mahardika ◽  
...  
Keyword(s):  
Histological Analysis ◽  
Mass Scale ◽  
Green Water ◽  
Larval Rearing ◽  
Receptor Cells ◽  
Optimum Density ◽  
Coral Trout ◽  
Economical Aspect ◽  
Plectropomus Leopardus ◽  
Average Size

Coral trout, Plectropomus leopardus (Lacepède, 1802)is a visual feeder. Turbidity caused by phytoplankton or clay particle in the water will affect the visual foraging of coral trout larvae. Addition of Nannochloropsis sp. has been included in standard operational procedure for marine fish larval rearing as green water. However, the density of Nannochlorposis sp. in coral trout larval rearing system has not been evaluated. This study aimed to evaluate the optimal of Nannochloropsis sp. required for rearing of coral trout larvae. Nannochloropsis sp. was given to two days old larvae (D-2), with the densities of 2 x 105, 4 x 105, and 6 x 105cell/mL. After 50 days rearing period (D-50), evaluation on the average size and total harvest were recorded. The results showed that the density of 2 x 105 cell/mL Nannochloropsis sp. was the best in survival rate (2.35 ± 1.05%) than other densities, but they were not significantly different (P>0.05) than those of 4 x 105 cell/mL (1.67 ± 0.70%) and 6 x 105 cell/mL (1.26 ± 1.05%). The lower densities, 2 x 105 and 4 x 105cell/mL, were dominated by more than 50% of > 2.7 cm sized juvenile. Histological analysis of fish eyes supported that the two lower densities produced dominant cone shape as the receptor cells in the retina observed. From an economical aspect, addition of 2 x 105 cells/mL resulted on the higher profit, hence optimum density of Nannochloropsis sp. added in coral trout larval rearing on a mass scale was 2 x 105 cells/mL.

scholarly journals PENINGKATAN SINTASAN LARVA IKAN KERAPU SUNU (Plectropomus leopardus) MELALUI MANAJEMEN PEMELIHARAAN YANG SESUAI

2019 ◽  
Vol 18 (1) ◽  
Author(s):  
Daniar Kusumawati ◽  
Yasmina Nirmala Asih ◽  
Ketut Maha Seti
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Larval Development ◽  
Early Stage ◽  
Larval Rearing ◽  
Total Production ◽  
Coral Trout ◽  
Standard Management ◽  
Plectropomus Leopardus ◽  
Increase Survival Rate

Survival rate of coral trout seed produced from aquaculture was relatively low. In 2015, high mortality was found at the early stage of larval development (<D10), approximately 64.37 % of the total production. There has been no standard management for coral trout (Plectropomus leopardus) larval rearing, which was used to adopt management for grouper (Epinephelus spp.) larval rearing. This study was to apply suitable management for coral trout larval rearing into aimed to decrase mortality at early stage larval development and to increase survival rate. There were two different managements in this study: A. applying the results of previous research of coral trout larval rearing from 2004 to 2015, and B. using standard management for grouper larval rearing. The results showed that management A was more suitable management for coral trout larval rearing compared to management B. Management A resulted in the increasing of survival rate by five times (p=0.0056) and of growth rate at early stage by 1.15 times (p=0.2338) higher than those of management B.  

A new species of Stephanostomum Looss, 1899 (Digenea, Acanthocolpidae) with a bizarre oral sucker: S. adlardi sp. nov. from the common coral trout Plectropomus leopardus (Lacepède, 1802) (Perciformes, Serranidae) from Lizard Island, Great Barrier Reef

2007 ◽  
Vol 52 (3) ◽  
Author(s):  
Rodney Bray ◽  
Thomas Cribb ◽  
Andrea Waeschenbach ◽  
D. Littlewood
Keyword(s):  
New Species ◽  
Great Barrier Reef ◽  
Oral Sucker ◽  
Ribosomal Rna ◽  
Barrier Reef ◽  
Coral Trout ◽  
Lizard Island ◽  
The Common ◽  
Plectropomus Leopardus ◽  
A New Species

AbstractA new species of Acanthocolpidae, Stephanostomum adlardi is described from the serranid Plectropomus leopardus from Lizard Island in the northern Great Barrier Reef. It differs from all previously described acanthocolpids in the structure of the oral sucker which is extended into dorsal and ventral lobes each bearing a row of spines. A phylogenetic tree estimated from combined nuclear small and partial large ribosomal RNA gene sequences shows that, despite the unusual oral sucker structure, the species is a true member of the genus Stephanostomum. The molecular results also suggest that Monostephanostomum nolani is derived from within Stephanostomum.

Population estimates and size structure of Plectropomus leopardus (Pisces : Serranidae) in relation to no-fishing zones: mark-release-resighting and underwater visual census

2000 ◽  
Vol 51 (3) ◽  
pp. 221 ◽  
Author(s):  
D. C. Zeller ◽  
G. R. Russ
Keyword(s):  
Great Barrier Reef ◽  
Population Size ◽  
Size Structure ◽  
Barrier Reef ◽  
Visual Census ◽  
Underwater Visual Census ◽  
Coral Trout ◽  
Population Size Estimates ◽  
Lizard Island ◽  
Plectropomus Leopardus

A mark–release–resighting (MRR) technique was used to estimate population size of the coral trout, Plectropomus leopardus, on coral reefs fringing Lizard Island, Great Barrier Reef, Australia. Fish were captured by hook-and-line fishing, and marked with individual freeze-brand numbers in August 1995. An underwater visual census (UVC) technique was used during September and October 1995 both for resighting of marked fish and to make an independent estimate of fish density and thus population size. The study area was 750 966 m2 . The UVC sampled 154 000 m2 (20.5%) of this area. Six different methods of analysis of MRR gave similar population size estimates (e.g. Petersen 12 873; 95% CI 9989–15 754) extrapolated to the 4.5 million-m2 reef area from datum to 20-m depth around Lizard Island. UVC gave a population size estimate (24 182; 95% CI 21 860–26 504) twice that of MRR. The lower estimate derived from MRR may be the result of tag-induced mortality, or of the relative difficulty in discriminating between marked and unmarked trout by UVC. This is only the second estimate of population size of coral trout on an area of the Great Barrier Reef.

Ontogenetic development of the digestive system and growth in coral trout (Plectropomus leopardus)

Aquaculture ◽  
2012 ◽  
Vol 334-337 ◽  
pp. 132-141 ◽  
Author(s):  
Meng Qu ◽  
Shaoxiong Ding ◽  
Xiaojing Xu ◽  
Minghui Shen ◽  
Yingzhe You ◽  
...  
Keyword(s):  
Digestive System ◽  
Ontogenetic Development ◽  
Coral Trout ◽  
Plectropomus Leopardus

scholarly journals Carotenoids of Red, Brown, and Black Specimens of Plectropomus leopardus, the Coral Trout (Suziara in Japanese)

2017 ◽  
Vol 66 (6) ◽  
pp. 579-584
Author(s):  
Takashi Maoka ◽  
Wataru Sato ◽  
Hidetada Nagai ◽  
Toshiyuki Takahashi
Keyword(s):  
Coral Trout ◽  
Plectropomus Leopardus

scholarly journals GONADAL DEVELOPMENT OF DOMESTICATED CORAL TROUT (Plectropomus leopardus) REARED IN FLOATING NET CAGE

2014 ◽  
Vol 6 (1) ◽  
Author(s):  
Sari BM Sembiring ◽  
R Andamari ◽  
A Muzaki ◽  
I K Wardana ◽  
J H Hutapea ◽  
...  
Keyword(s):  
Body Weight ◽  
Research And Development ◽  
Gonadal Development ◽  
Development Stage ◽  
Gonad Maturation ◽  
Gonadal Maturation ◽  
Coral Trout ◽  
Net Cage ◽  
Plectropomus Leopardus ◽  
Maturation Index

<p>Research on Coral trout breeding has been started since 2002 at the Institute of Mariculture Research and Development and currently some hatcheries are being developed around the institute using natural broodstock. To promote the success on this breeding program, it is necessary to study the reproduction development of domesticated coral trout. The fishes were reared in floating net cage. Observation were conducted on 163 fishes in June 2013 with body weight range from 710 -2020 g (average of 1.393 g) and total length with range of 34-49.5 cm. Fishes were dissected and taken  out their gonad for histology preparedness. Histology analyses found that there were 156 female, 2 hermaprodite, 2 male, and 3 unidentified fishes. All female fishes were on early gonadal development (stage I and II with gonadal maturation index of observed coral trout ranged from 0.1 to 1.83). Further analyses showed that several different stages of gonad were found in the same gonad and concluded that coral trout was multiple spawnning order (asynchrounous). Based on the data above, it was concluded that gonad maturation of Coral trout is able to develop in domestication system in floating net cage.</p> <p>Keywords: Gonad, Coral trout (Plectropomus leopardus), hystology, floating net cage</p>

Sign in / Sign up

Export Citation Format

Share Document