scholarly journals Pollen as a component of the diet of Doru luteipes (Scudder, 1876) (Dermaptera: Forficulidade)

2019 ◽  
Vol 79 (4) ◽  
pp. 584-588 ◽  
Author(s):  
R. C. Marucci ◽  
I. L. Souza ◽  
L. O. Silva ◽  
A. M. Auad ◽  
S. M. Mendes
Keyword(s):  
Survival Rate ◽  
Spodoptera Frugiperda ◽  
Artificial Diet ◽  
Time Span ◽  
Biological Parameters ◽  
High Fecundity ◽  
Maize Pollen ◽  
Rhopalosiphum Maidis ◽  
Biological Variables ◽  
Biological Responses

Abstract The properties of maize pollen in the diet of Doru luteipes were determined by biological responses of the predator feeding on natural preys and artificial diet. The biological parameters of D. luteipes fed on Spodoptera frugiperda (Smith, 1797) eggs, maize pollen, Rhopalosiphum maidis (Fitch, 1856) + maize pollen and R. maidis were assessed. The effect of pollen on artificial diet on the biological variables of the predator nymphs and adults were also evaluated. Time span of nymphal development was greater for D. luteipes exclusively fed on earwigs, with the lowest rate of nymph survival. However, maize pollen plus earwigs in the diet provided the predator´s highest survival rate, whilst percentage of fertile females was double when fed on diets composed of S. frugiperda and R. maidis eggs. Development period decreased when D. luteipes nymphs consumed artificial diet plus pollen but there were high fecundity rates (number of laying/female and total egg/female) and a greater percentage of fertile females when they were fed on maize pollen.

scholarly journals Comparison of Some Biological Parameters between Young Grass Carp, Ctenopharyngodon idella (Valenciennes, 1884) fed on Artificial Diet and Alfalfa inEarthen Ponds at Basrah, Iraq

2022 ◽  
Vol 6 (1) ◽  
pp. 1-13
Author(s):  
Sadik Muhammed
Keyword(s):  
Survival Rate ◽  
Grass Carp ◽  
Alimentary Canal ◽  
Artificial Diet ◽  
Condition Factor ◽  
Relative Length ◽  
Ctenopharyngodon Idella ◽  
Biological Parameters ◽  
Alfalfa Plant ◽  
Grass Carp Ctenopharyngodon Idella

The current study aims to compare the relationships of some biological parameters of young grass carp, Ctenopharyngodon idella (Valenciennes, 1844) fed on artificial diet and alfalfa in earthen ponds. These parameters included length-weight relationship, relative length and weight of the alimentary canal, condition factor and survival rate. Results of lengthweight relationship showed that no significant differences (P>0.05) were recorded for the t-test for the ideal value of 3 for fishes fed on artificial diet or alfalfa plant. The condition factor of young grass carp fed on artificial diet ranged between 0.021 to 1.074, while for fishes fed on alfalfa plant was 0.023 to 1.270 for allometric and Fulton’s condition factor, respectively. Also, there was no significant difference (P>0.05) for fishes fed on both diets in all biological parameters, the relative length of the alimentary canal for fishes fed on artificial diet (1.65) and on alfalfa plant (1.69), while the relative weight of the alimentary canal were 0.0285 and 0.0218 for fishes fed on both diets, respectively. Results also showed that the Zihler coefficient were 7.43 and 7.62, respectively. The survival rate was 100% for both treatments.

scholarly journals POTENCIAL INSETICIDA DO EXTRATO ETANÓLICO DE Anadenanthera macrocarpa (BENTH.) EM LEPIDÓPTEROS-PRAGA

Nativa ◽  
2019 ◽  
Vol 7 (6) ◽  
pp. 668
Author(s):  
Glauciany Soares Lopes ◽  
Luciana Barboza Silva ◽  
Eliane Carneiro ◽  
Manoel Lopes da Silva Filho ◽  
João Sammy Nery de Souza ◽  
...  
Keyword(s):  
Helicoverpa Armigera ◽  
Spodoptera Frugiperda ◽  
Ethanolic Extract ◽  
Chemical Compounds ◽  
Biological Parameters ◽  
Biological Cycle ◽  
Period Increase ◽  
Lepidopteran Species ◽  
Helicoverpa Armígera ◽  
Efficient Alternative

O complexo de lagartas desfolhadoras - Spodoptera cosmioides, Spodoptera frugiperda e Helicoverpa armigera, são responsáveis por uma considerável redução na produção de grãos. A aplicação de extratos botânicos consiste em uma alternativa viável e eficiente de controle, além de ser menos nociva ao meio ambiente e a saúde do homem. O objetivo foi avaliar o potencial inseticida do extrato bruto de folhas e casca de Anadenanthera macrocarpa, sobre as lagartas de S. frugiperda, S. cosmioides, H. armigera. Os insetos foram mantidos em dieta artificial em condições controladas. Foi avaliada a ação toxica dos extratos por aplicação tópica. Primeiramente foi estimada a concentração letal e em seguida foram determinados os parâmetros biológicos das três espécies de lepidópteros. Os extratos etanólicos de folhas e casca de A. macrocarpa foram eficientes no controle de H. armigera, S. frugiperda e S. cosmioides reduzindo a sobrevivência em 75, 60 e 50%, respectivamente, além de alterações nos parâmetros biológicos como, aumento do período larval, redução de peso das larvas e pupas. Os compostos químicos presentes nos extratos etanólicos de folhas e casca de A. macrocarpa, além de causar mortalidade direta dos insetos estudados, alteram o ciclo biológico de S. frugiperda, S. cosmoides e H. armigera.Palavras-chave: Angico-preto; Spodoptera cosmioides; Spodoptera frugiperda; Helicoverpa armigera; bioinseticidas. POTENTIAL INSECTICIDE OF THE ETHANOLIC EXTRACT OF Anadenanthera macrocarpa (BENTH.) IN LEPIDOPTERAN-PESTS ABSTRACT: The leafless worm complex - Spodoptera cosmioides, Spodoptera frugiperda and Helicoverpa armigera - are responsible for a considerable reduction in grain production. The application of botanical extracts is a viable and efficient alternative of control, besides being less harmful to the environment and human health. The objective was to evaluate the insecticidal potential of the raw extract of leaves and bark of Anadenanthera macrocarpa, on S. frugiperda, S. cosmioides, H. armigera. The insects were kept on artificial diet under controlled conditions. The toxic action of the extracts was evaluated by topical application. First the lethal concentration was estimated and then the biological parameters of the three lepidopteran species were determined. The extracts of leaves and bark of A. macrocarpa were efficient in the control of H. armigera, S. frugiperda and S.a cosmioides, reducing survival in 75, 60 and 50%, respectively, as well as changes in biological parameters such as larval period increase, weight reduction of larvae and pupae. The chemical compounds present in the leaves and bark extracts of A. macrocarpa, besides causing direct mortality of the studied insects, alter the biological cycle of S. frugiperda, S. cosmoides and H. armigera.Keywords: Angico-black; Spodoptera cosmioides; Spodoptera frugiperda; Helicoverpa armígera; bioinsecticides.

scholarly journals Effect of ivermectin on the life cycle and larval fat body of Culex quinquefasciatus

2004 ◽  
Vol 47 (3) ◽  
pp. 433-439 ◽  
Author(s):  
Stenio Nunes Alves ◽  
José Eduardo Serrão ◽  
Giovani Mocelin ◽  
Alan Lane de Melo
Keyword(s):  
Life Cycle ◽  
Survival Rate ◽  
Culex Quinquefasciatus ◽  
Fat Body ◽  
Adult Stage ◽  
Histological Study ◽  
Lethal Effect ◽  
Egg Mass ◽  
Biological Parameters ◽  
Study Results

The present work investigated the behavior, survival rate and lethal effect of 1.5 ppb ivermectin on Culex quinquefasciatus larvae, based on morphological and biological parameters, and possible alterations of their fat body. Changes in the number of eggs/egg mass and length of the larval stage were investigated. For this experiment, 600 larvae of 3rd and 4th instars of the mosquito were tested. The laid eggs were separated and the hatched larvae were counted. Some larvae submitted to 1.5 ppb ivermectin solution were used to prepare samples for histological study. Results obtained showed that ivermectin in a concentration of 1.5 ppb caused paralysis to the larvae with a mortality rate of 73.38%, mobilization of substances stored in the fat body and reduction of the number of egg laid in the adult stage.

scholarly journals Substitution time of natural food by artificial diet on survival rate and growth of pacific white shrimp (Litopenaeus vannamei) postlarvae during rearing in low salinity media

2011 ◽  
Vol 10 (1) ◽  
pp. 38
Author(s):  
Ferdinand Hukama Taqwa ◽  
Daniel Djokosetiyanto ◽  
Ridwan Affandi
Keyword(s):  
Survival Rate ◽  
Litopenaeus Vannamei ◽  
Crude Protein ◽  
Artificial Diet ◽  
Pacific White Shrimp ◽  
White Shrimp ◽  
Natural Food ◽  
Daily Growth ◽  
Growth And Survival ◽  
Low Salinity

<p>This research was conducted to determine natural food substitution time by artificial diet   after salinity acclimatization from 20 ppt until 2 ppt, which can increase survival and growth of (<em>Litopenaeus vannamei</em>) postlarvae during rearing period. Design experiment was completely randomized design with five treatments and three replications of natural food <em>Chironomus</em> sp.  (60% of crude protein) substitution time by artificial diet (40% of crude protein) at day: 1 (A), 7 (B), 14 (C), 21 (D) and full natural food without artificial diet (E) during 28 days rearing period. White shrimp postlarvae and rearing media in this experiment based from best result of earlier research that is PL<sub>25 </sub>from acclimatization in media 2 ppt with addition of potassium 25 ppm to freshwater media.  The densities of PL<sub>25</sub> white shrimp were 20 PLs/50 liters of 2 ppt media. The result of this experiment showed that the use of artificial diet as soon as after salinity acclimatization (PL<sub>25</sub>) gave best performance production compared to which only that was given natural food <em>Chironomus</em> sp. during experiment or with treatment by artificial diet substitution at day-7, day-14 or day-21, shown with the highest value of food consumption level, protein retention, energy retention, daily growth rate and food efficiency. Survival rate of PL<sub>54</sub> was above 80% and not significant different between treatment. That is supported by chemical-physical value of water quality still in range appropriate to survival rate of white shrimp post larvae during a rearing period. The result of this experiment indicated that requirement nutrient of PL<sub>25</sub> in low salinity did not fulfilled if only rely on natural food, so that require artificial diet with nutrition content to support growth and survival rate of white shrimp post larvae more maximal.</p> <p>Key words: salinity, natural food, artificial diet, Pacific white shrimp</p> <p> </p> <p>ABSTRAK</p> <p>Tujuan penelitian ini adalah untuk menentukan waktu penggantian pakan alami oleh pakan buatan yang tepat selama masa pemeliharaan postlarva udang vaname di media bersalinitas rendah setelah melalui masa aklimatisasi penurunan salinitas dari 20 ppt hingga 2 ppt, sehingga dapat meningkatkan pertumbuhan dan kelangsungan hidup. Rancangan percobaan berupa rancangan acak lengkap dengan perlakuan yang diterapkan berupa waktu penggantian pakan alami <em>Chironomus </em>sp. (kadar protein 62%) oleh pakan buatan (kadar protein 40%) pada hari ke-1 (A), ke-7 (B), ke-14 (C), ke-21 (D) dan pakan alami (E) selama masa pemeliharaan. Postlarva udang vaname dan media pemeliharaan yang dipergunakan selama percobaan mengacu pada hasil terbaik yang didapatkan dari penelitian pendahuluan yaitu berupa PL<sub>25 </sub>hasil aklimatisasi di media bersalinitas 2 ppt  dengan penambahan kalium 25 ppm ke media air tawar pengencer. Padat tebar sebanyak 20 ekor/50 liter/wadah. Hasil percobaan menunjukkan bahwa pemberian pakan buatan yang diberikan segera setelah masa aklimatisasi salinitas (pada awal pemeliharaan PL<sub>25</sub>) memberikan performa produksi budidaya terbaik bila dibandingkan dengan yang hanya diberi pakan alami selama masa pemeliharaan maupun waktu penggantian pakan alami oleh pakan buatan pada hari ke-7, ke-14 dan hari ke-21 yang ditunjukkan dengan tingkat konsumsi pakan, retensi protein, retensi energi, laju pertumbuhan harian dan efisiensi pakan yang tertinggi.  Kelangsungan hidup di akhir pemeliharaan (PL<sub>54</sub>)  di atas 80% dan tidak berbeda nyata antar perlakuan. Hal ini ditunjang oleh nilai fisika kimia air yang berada dalam kisaran yang layak selama masa pemeliharaan. Hasil percobaan ini menunjukkan bahwa kebutuhan nutrisi pada stadia PL<sub>25</sub> di media bersalinitas rendah tidak terpenuhi jika hanya mengandalkan pakan alami sehingga perlu ditunjang dari pakan buatan dengankandungan nutrisi yang dapat mendukung pertumbuhan dan kelangsungan hidup yang lebih maksimal.</p> <p>Kata kunci: salinitas, pakan alami, pakan buatan, udang vaname.</p>

scholarly journals THE EFFECTS OF WEANING TIME ON THE GROWTH AND SURVIVAL OF MUD CRAB (Scylla olivacea)THE EFFECTS OF WEANING TIME ON THE GROWTH AND SURVIVAL OF MUD CRAB (Scylla olivacea)

2018 ◽  
Vol 13 (2) ◽  
pp. 63
Author(s):  
Haryati Haryati ◽  
Yushinta Fujaya ◽  
Early Septiningsih
Keyword(s):  
Survival Rate ◽  
Artificial Diet ◽  
Control Treatment ◽  
Larval Rearing ◽  
Mud Crab ◽  
Artificial Diets ◽  
Growth And Survival ◽  
The Third ◽  
Crab Larvae ◽  
Research Experiment

Live foods such as rotifers and Artemia are commonly used as foods in larval rearing of mud crab (S. olivacea). However, the continuous availability and nutritional consistency of live foods are difficult to control. Thus, the development of artificial diets to partially or fully replaced live foods is needed to overcome the limitations of live foods. The purpose of this research was to determine the best stage at which mud crab larvae can be weaned from live foods to artificial diets. The research experiment consisted of: treatment-1, the larvae were fed with live foods from zoea-1 to megalopa stages as the control treatment; treatment-2, the larvae were fed with artificial diet from zoea-2 to megalopa stages; and treatment-3, the larvae were fed with artificial diet from zoea-3 to megalopa stages. In treatment-4, artificial diet was given from zoea-4 to megalopa stages. The growth and survival rate of larvae in treatment-1, 3, and 4 were not significantly different (P>0.05) but significantly different with treatment-2. Based on the present results, this study suggests that artificial diet can be given to mud crab larvae (S. olivacea) from the third zoea stage.

scholarly journals Growth of green catfish seed fed on sludge worm and artificial feed combination

2014 ◽  
Vol 12 (1) ◽  
pp. 18
Author(s):  
Netti Aryani ◽  
Niken Ayu Pamungkas ◽  
. Adelina
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Survival Rate ◽  
Artificial Diet ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Growth And Survival ◽  
Absolute Length ◽  
The Absolute ◽  
Mystus Nemurus

<p class="NoParagraphStyle" align="center"><strong>ABSTRACT</strong></p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle">This research aimed to obtain information of growth and survival of green catfish (<em>Mystus nemurus</em>) juvenile fed with sludge worm (<em>Tubifex</em> sp.; T) and artificial diet (PB) and added with the combination of 50% soybean pulp waste and 50% freshwater trash fish. Feeding was performed in several variation of time during 40 days of fish rearing. Average body length of juvenile was 12 mm and weight 2.8±0.0 mg, maintained at a density of 30 individuals/aquarium. The treatment in this research was T10PB30 (8–18 days old juvenile were fed with sludge worm and 18–48 days old fish were fed with artificial diet), T20PB20 (8–28 days old juvenile were fed with sludge worm and 28–48 days old were fed with artificial diet), T30PB10 (8–38 days old juvenile were fed with sludge worm and 38–48 days old were given artificial diet), PB40 (8–48 days old juvenile were fed artificial diet), T40 (8–48 days old juvenile were fed with sludge worm). The results indicated that the treatment of 40 days feeding with sludge worm provided the best growth and survival as daily growth rate of 16.4±28.0 g/day, the growth of the absolute length was 43.60±0.01 mm, the absolute body weight 2,047.2±35.0 mg and the survival rate was 96.44%. The best artificial feeding treatment was feeding with sludge worm for 30 days and with 10 days of artificial diet, results in daily growth rate of 4.53±0,25 mm/day, the growth of the absolute length 40.00±0.04 mm, the absolute body weight 1,447.2±15.0 mg, and the survival rate 94.44±2.60%.</p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle">Keywords: artificial feed, sludge worm, growth, green catfish</p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle" align="center"><strong>ABSTRAK</strong></p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle">Penelitian ini bertujuan untuk mendapatkan informasi pertumbuhan dan sintasan benih ikan baung (<em>Mystus nemurus</em>) dengan pemberian cacing sutra (<em>Tubifex</em> sp.; T) dan pakan buatan (PB) kombinasi 50% limbah ampas tahu dan 50% ikan rucah air tawar. Pakan diberikan dengan variasi lama waktu berbeda selama pemeliharaan 40 hari. Rerata panjang awal benih adalah 12 mm dan bobot tubuh 2,8±0,0 mg, dipelihara dengan kepadatan 30 ekor/akuarium. Perlakuan dalam penelitian ini adalah T10PB30 (benih umur 8–18 hari diberi pakan cacing sutra dan umur 18–48 hari pakan buatan), T20PB20 (benih umur 8–28 hari diberi cacing sutra dan umur 28–48 pakan buatan), T30PB10 (benih umur 8–38 diberi pakan cacing sutra dan umur 38–48 diberi pakan buatan), PB40 (benih umur 8–48 hari diberi pakan buatan), T40 (benih umur 8–48 hari diberi pakan cacing sutra). Hasil penelitian ini menunjukkan bahwa perbedaan lama waktu pemberian cacing sutra dan pakan buatan yang terbaik adalah pemberian pakan cacing sutra selama 40 hari dengan laju pertumbuhan harian 16,4±28,0 g/hari, pertumbuhan panjang mutlak 43,60±0,01 mm, bobot mutlak 2.047,2±35,0 mg, dan sintasan 96,44%. Selanjutnya variasi lama waktu pemberian pakan buatan yang terbaik adalah pemberian cacing sutra selama 30 hari dan pakan buatan sepuluh hari dengan laju pertumbuhan harian sebesar 4,53±0,25 mm/hari, pertumbuhan panjang mutlak 40,00±0,04 mm, bobot mutlak 1.447,2±15,0 mg, dan sintasan 94,44±2,60%.</p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle">Kata kunci: pakan buatan, cacing sutra, pertumbuhan, ikan baung</p><p> </p>

scholarly journals REPRODUCTIVE PERFORMANCE OF DOMESTICATED BROODSTOCK OF SILVER PERCH, Bidyanus bidyanus (MITCHELL 1838) AND THE RELATIONSHIP BETWEEN OIL GLOBULE FRAGMENTATION AND EGG QUALITY

2017 ◽  
Vol 12 (2) ◽  
pp. 43 ◽  
Author(s):  
Sulaeman Sulaeman ◽  
Ravi Fotedar
Keyword(s):  
Survival Rate ◽  
Reproductive Performance ◽  
Egg Quality ◽  
Fertilization Rate ◽  
Hatching Rate ◽  
High Fecundity ◽  
Fertilisation Rate ◽  
Significant Difference ◽  
The Relationship

The experiments investigated the reproductive performance of the domesticated broodstock of the silver perch and the relationship between various degrees of oil globule fragmentation and egg quality. Six years old of second generation broodstock (n=3) were evaluated based on the fecundity, fertilisation rate, hatching rate, the degree of oil fragmentation of egg, and the quality of embryos and larvae produced. The fragmentation were grouped into three categories: un-fragmented (cat-1), moderately fragmented (cat-2), and highly fragmented (cat-3). The results showed that the broodstock had a relatively high fecundity (132,400 ± 7,22), fertilization rate (94.27 ± 1.28%), and hatching rates (87.94 ± 1.23%). The survival rate of larvae at 12 days post hatching (dph) in cat-1 (71.3 ± 0.9%) was higher than cat-2 (66.7 ± 0.9%) whereas cat-2 was higher than cat-3 (61.3 ± 0.3%). The eggs was dominated by cat-1 (78.11 ± 2.44%) which was significantly higher than cat-2 (21.26 ± 2.45%) and cat-3 ones (0.40 ± 0.21%). The survival rate of embryo at 20 hours post spawning (hps) and hatching rate of cat-1 (95.33 ± 0.00% and 93.33 ± 0.00%) and cat-2 (90.00 ± 0.00% and 85.00 ± 0.00%) were significantly higher than cat-3 (72.33 ± 1.76% and 60.33 ± 0.00%). The total length (TL) of the larvae of cat-1 and cat-2 (8.44 ± 0.21 mm and 8.35 ± 0.23 mm respectively) were significantly higher than larvae of cat-3 (7.09 ± 0.14 mm). No significant difference was found in the larval deformities among any categories. In conclusion, the reproductive performance of six year-old broodstock silver perch showing acceptable performance and egg categorisation based on oil globule fragmentation can be used as a useful tool to indicate eggs quality of silver perch.

scholarly journals Biological parameters of Xylotrechus arvicola females, an insect pest in Iberian Peninsula vineyards

OENO One ◽  
2017 ◽  
Vol 51 (4) ◽  
pp. 373
Author(s):  
Álvaro Rodríguez-González ◽  
Sara Mayo ◽  
Óscar González-López ◽  
Horacio José Peláez ◽  
Pedro Antonio Casquero
Keyword(s):  
Iberian Peninsula ◽  
Artificial Diet ◽  
Woody Plant ◽  
Insect Pest ◽  
Egg Laying ◽  
Biological Parameters ◽  
Essential Nutrients ◽  
High Viability ◽  
Important Pest ◽  
Over Time

Aims: Xylotrechus arvicola is an important pest in vineyards of the Iberian Peninsula. The action of X. arvicola larvae, associated to the spread of fungi, causes direct and indirect damage in the vineyard. Biological parameters from wild (captured in the field) and laboratory females (reared in the laboratory) were investigated to provide more information about the pest-control measures.Methods and results: The pre-laying period, post-laying period, longevity and egg laying parameters (fecundity, viability and number) were evaluated in wild and laboratory females. Both female groups (wild and laboratory) needed a short pre-laying period, which was longer in wild females. Laboratory females, whose larvae were reared on artificial diet, had the greatest fecundity during the 1st two egg layings. Wild females showed the greatest fecundity and viability of eggs during the 1st egg laying; these fecundity and viability rates decreased over time with the next egg layings, whereas in laboratory females, fecundity and viability decreased faster. Wild females had the greatest percentage of viable eggs in the 1st six egg layings (44.11% in the 1st and 11.15% in the 6th), reaching a maximum number of 18 egg layings in laboratory.Conclusions: These results suggest that the diet satisfies larval nutritional requirements, increasing production of laboratory females´ eggs (greatest fecundity in the 1st two egg layings). Nevertheless, this artificial diet may lack certain essential nutrients that would increase the viability of eggs.Significance and impact of the study: The host, a woody plant, would provide these essential nutrients when the larvae of wild females are developing in the field, these wild females being able to perform successive egg layings in laboratory with a high viability of eggs. 

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