Penetapan Kadar Kalsium dalam Pakan Formulasi untuk Zoea Awal Kepiting Scylla paramamosain

<strong>Determination of Calcium Concentration in Formulated Feed for Early Zoea Crab Scylla paramamosain.</strong> Calcification process of the new shell during postmoulting of crab fries needs calcium from food and water in the environment. However, the digestive enzymes in the early phase of zoea have not functioned perfectly yet, so the artificial feed given in the ration of crab fries may be less digestable. Therefore, in this study Enzyplex (commercial enzyme) was added to the formulated feed for rearing of crab fries (zoea at early phase). The purpose of this study was to determine the effect of calcium addition into the formulated feed on the growth and survival of mud crab Scylla paramamosain Zoea. The study was conducted in August 2015 for 3 days. Zoea were kept in ecoplast containers with a stocking density of 50 ind / L. Calcium-D Kalzana was added as much as 0 mg/g (A), 50 mg/g (B), 100 mg/g (C), 150 mg/g (D ), and 200 mg/g (E) per batter (34.50 g) of formulated feed, with 9 replications for each treatment. All ecoplast containers were placed in a waterbath at 30°C. The results show that the addition of calcium at a dose of 50 mg/g can successfully support the growth of Zoea I into Zoea II (66%) with the highest survival rate (7.6 ± 4.98%). The size of cephalothorax (597.69 ± 65.81 m), abdomen ( 1135.39 ± 126.47 m), and telson (409.23 ± 61.80 m) are shown to be larger than the other four treatments.<br /><br />

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Effects of different temperatures on the growth and survival of mud crab (Scylla paramamosain) larvae

Can Tho University Journal of Science ◽

10.22144/ctu.jen.2021.035 ◽

2021 ◽

Vol 13 (3) ◽

pp. 9-16

Author(s):

Thanh Phuong Nguyen ◽

Tinh Em Nguyen ◽

Thi Kim Ha Nguyen ◽

Quoc Viet Le ◽

Thi Thanh Huong Do

Keyword(s):

Carapace Width ◽

Survival Rates ◽

Stocking Density ◽

Scylla Paramamosain ◽

Mud Crab ◽

Growth And Survival ◽

Randomized Design ◽

Different Temperatures ◽

Temperature Levels ◽

Two Stages

This study aimed to evaluate the effects of temperature on the growth and survival of mud crab (Scylla paramamosain) larvae in two stages including zoea-1 to megalopa (the first experiment) and megalopa to crablet-1 (the second experiment). Each experiment was conducted in a completely randomized design with four temperature levels (27, 30, 33, and 36℃) in triplicate. Stocking density of 200 ind./L for the first experiment and 4 ind./L for the second experiment. Fiberglass tanks of 500-L (containing 300-L and 250-L of 25‰ water for the first and second experiment, respectively) were used in the experiments. The results showed that S. paramamosain larvae at zoea-3 and zoea-4 died at 33℃ or above, while the highest survival rate of this stage was found at 27℃ (11.5%). The growth and larval stage index during the zoea to megalopa stage were significantly higher in 30℃ (p<0.05) compared to those in the 27℃ treatment. In the second experiment, the survival rates of crablet-1 were highest (72.9%) at 27℃ and lowest (34,7%) at 36℃. The growth rate of crablets at this stage increased with increased temperature. The highest carapace width and weight (3.41 mm and 0.030 g, respectively) were recorded at 36℃. The findings of this study suggested that mud crab larvae should be reared at the temperature range of 27-30℃ to maximize their production.

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Effects of Essential Fatty Acids Containing Natural and Commercial Diets on Larvae Rearing of the Green Mud Crab Scylla Paramamosain (Estampador 1949)

Journal of Scientific Research ◽

10.3329/jsr.v1i1.28805 ◽

2017 ◽

Vol 9 (1) ◽

pp. 109-126

Author(s):

M. L. Islam ◽

M. S. Islam ◽

K. Yahya ◽

R. Hashim

Keyword(s):

Fatty Acids ◽

Docosahexaenoic Acid ◽

Eicosapentaenoic Acid ◽

Essential Fatty Acids ◽

Scylla Paramamosain ◽

Mud Crab ◽

Growth And Survival ◽

Commercial Diet ◽

Larval Stages ◽

Commercial Diets

Effect of essential fatty acids (EFA) on growth and survival of the green mud crab (Scylla paramamosain) larvae was assessed by feeding with natural to commercial diets. The feeding schemes were: larvae reared with Artemia (T1); larvae initially fed with rotifers (up to Z2) and ended (Z3 to megalopa) with Artemia (T2); and larvae fed with rotifers up to Z2 and ended (Z3 to megalopa) with commercial diet (T3). The commercial diet had significantly (p<0.05) higher levels of docosahexaenoic acid (11.23%), ?n-3s (15.90%) and ?n-6s (4.21%); and lacked in eicosapentaenoic acid (2.25%) than rotifer and Artemia. The earliest commencement of megalopa stage within 15 days with significantly (p<0.05) higher larval stage index (LSI) of 5.90±0.17 was achieved from the feeding scheme of T2 than other two feeding schemes. This feeding scheme deposited 17.32±0.19% eicosapentaenoic acid (EPA) and 3.82±0.11% docosahexaenoic acid (DHA); the ?n-3 to ?n-6 ratio of 0.20 and EPA to DHA ratio of 0.22 in megalopa, that stimulated significantly higher (p<0.05) megalopa survival (20.00±6.96%) indicating the superiority over rest feeding schemes. Meanwhile, some deformities and mortalities in Z5 and megalopa stages suggested further studies for optimization of specific fatty acid requirements for late larval stages (Z5 and megalopa).

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ƯƠNG GIỐNG CUA BIỂN (Scylla paramamosain) VỚI CÁC LOẠI THỨC ĂN VÀ MẬT ĐỘ KHÁC NHAU

Tạp chí Khoa học và Công nghệ Biển ◽

10.15625/1859-3097/20/1/13335 ◽

2020 ◽

Vol 20 (1) ◽

Author(s):

Le Quoc Viet ◽

Tran Ngoc Hai

Keyword(s):

Survival Rate ◽

Growth Performance ◽

Stocking Density ◽

Scylla Paramamosain ◽

Mud Crab ◽

Commercial Feed ◽

Set Up

This study aims to determine the appropriate feed type and stocking density to improve the survival rate and growth performance of mud crab crablet during the nursery stage. The study consisted of 2 experiments as follows: (1) Rearing crablets with different feed types (including commercial feed, artemia biomass and acetes biomass) and (2) rearing crablets at different stocking densities (including 100; 200; 300 and 400 inds/m2). All treatments were randomly set up in triplicate. The initial sizes of crablet were 3.24 ± 0.54 mm in length, 4.54 ± 0.79 mm in width and 0.018 ± 0.004 g in weight. The result showed that using acetes biomass gave the best results compared to other treatments. The survival rate was 58.8% and biomass was 118 inds/m2. The second experiment showed that rearing crablets at 100 inds/m2 reached the highest survival rate (90.7%) and biomass (91 inds/m2).

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Ontogenic Development of Digestive Enzymes of Mud Crab (Scylla paramamosain) During Larval Stages

Thalassas An International Journal of Marine Sciences ◽

10.1007/s41208-019-00143-5 ◽

2019 ◽

Vol 35 (2) ◽

pp. 655-661 ◽

Cited By ~ 1

Author(s):

Tran Nguyen Duy Khoa ◽

Nguyen Thi Mai ◽

Nguyen Khanh Linh ◽

Ly Thi Yen Mi ◽

Faizah Shaharom-Harrison

Keyword(s):

Digestive Enzymes ◽

Scylla Paramamosain ◽

Mud Crab ◽

Larval Stages ◽

Ontogenic Development

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Parentage determination of the mud crab Scylla paramamosain using microsatellite markers

Aquaculture Research ◽

10.1111/are.13450 ◽

2017 ◽

Vol 49 (1) ◽

pp. 217-221

Author(s):

Xiaojun Xu ◽

Guizhong Wang ◽

Chaoshu Zeng ◽

Shaojing Li

Keyword(s):

Microsatellite Markers ◽

Scylla Paramamosain ◽

Mud Crab

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Efficacy of Formulated Feed Preference and Stocking Density on Growth and Survival of Baby Pila globosa Reared in Laboratory Condition

Annual Research & Review in Biology ◽

10.9734/arrb/2021/v36i730401 ◽

2021 ◽

pp. 86-91

Author(s):

Md. Shariful ISLAM ◽

A. F. M. Shofiquzzoha ◽

Nilufa Begum

Keyword(s):

Laboratory Condition ◽

Fish Meal ◽

Stocking Density ◽

Fish Feed ◽

Fish Diet ◽

Growth And Survival ◽

Formulated Diet ◽

Pila Globosa ◽

Formulated Feed ◽

Pellet Feed

Quality diet as food for raising freshwater snails under laboratory conditions has a significant effect on their growth and the number of egg clutches laid as well as on the size of the snail. Now a days, some innovative farmers of Bangladesh started snail culture within their fish farms in the view of producing snail to use as feed for their Prawn (Macrobrachiam rosenbergii), indigenous catfish (Clarius batrachus) farms, domestic duck farms and also as a protein supplement for preparing fish feed. From previous study we know that Bulinus nyassanus growth and survive rate was found well on locally formulated fish diet consisting of 30% crude protein with ingredients comprising fish meal, maize bran, rice bran, soya bean, wheat bran, hemicellulose (binder), vitamin premix and mineral premix. But no such research has been done in case of apple snail. The present study was aimed to investigate the feed formulation preferred by Pila globosa species and their effects on survival and growth of these snails in laboratory condition. Three type of formulated feed viz., pellet feed, fish meal and 50% fish meal + 50% crusted khudipana were used for the experiment in high and low stocking density of baby snails. The present findings shown that the diets in order of preference based on their effects on growth and survival of snails were formulated pellet feed, fish meal and 50% fish meal+ 50% crushed khudipana. After rearing of 28 days, highest growth found 0.32g with 86.66% survival with formulated diet in 60nos/L stocking density and 0.35g with 90% survival with formulated diet in 30nos/L stocking density. It`s indicate that the snails reared on formulated pellet feed diets and lower stocking density gave better performance in terms of survival and mean growth rate than those reared on other diets.

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