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| Registros recuperados: 62 | |
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| Zouiten El Abed, D.. |
| Le développement de l’aquaculture repose avant tout sur l’approvisionnement en specimens à élever mais pour la majorité des espèces, le recrutement naturel est insuffisant pour constituer une base d’élevages à grandes échelles. La production aquacole tunisienne est essentiellement piscicole et l’élevage extensif dans les barrages y contribue de façon importante. L'élevage des larves de poissons constitue une étape incontournable pour la production d’alevins destinés à la pisciculture et aux efforts de repeuplement des lacs de barrages et lagunes côtières tunisiennes. Dans cette thèse, des élevages larvaires expérimentaux en mésocosme ainsi que des études comparatives entre les larves élevées avec les techniques intensives et semi-extensives ont été... |
| Tipo: Theses and Dissertations |
Palavras-chave: Larval development; Rearing; Ontogeny; Aquaculture; Mesocosms. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5529 |
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| Claus, C.; Maeckelberghe, H.; De Pauw, N.. |
| From October to April the growth of spat of <i>Ostrea edulis, Crassostrea gigas</i> and <i>Venerupis semidecussata</i> in an onshore nursery was recorded as a function of water temperature and food level. The results of this study indicate that even very eutrophic water, such as that of the Sluice Dock at Ostend, Belgium, does not provide enough microalgae to sustain growth of bivalve spat during winter, irrespective of whether the water is heated or not. It is necessary to supply additional food (cultured live algae). Food shortage for three months at higher temperature induced a stress situation resulting in high mortality rates, even after transferring all the spat into an optimal combination of temperature and food availability. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture techniques; Rearing; Bivalvia; Molluscs; Belgium. |
| Ano: 1983 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3369 |
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| De Pauw, N.; Verboven, J.; Claus, C.. |
| The feasibility of large-scale bloom induction of nutritionally suited natural phytoplankton species, to feed a semi-industrial nursery of edible shellfish, built on the Belgian coast, was tested. The outdoor microalgal production unit consisted of four tanks of 100 m² surface each (two of 1 m depth and two of 0.5 m depth), equipped with different mixing devices. The cultures were run as chemostats in which seawater was enriched with commercial inorganic N, P and Si fertilizers. Depending on the season, between 5-10 and 80% of the culture volume could be harvested daily, with algal densities ranging from 50,000 to 500,000 cells per ml. By manipulation of operational parameters such as detention time, nutrient levels and nutrient ratios (N: Si: P), unsuited... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algal culture; Marine aquaculture; Mass culture; Mollusc culture; Rearing; Chaetoceros; Chlorella; Nitzchia; Phaeodactylum; Skeletonema. |
| Ano: 1983 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3395 |
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| Huys, L.; Dhert, P.; Robles, R.; Ollevier, F.P.; Sorgeloos, P.; Swings, J.. |
| The aerobic bacterial flora in the gut of turbot larvae and their influence on larval survival was examined. Two turbot experiments were run with six replicates each time. Large variation, from 0% up to 44%, was observed in the survival percentage of turbot larvae. There was no correlation between the number of bacteria present in the gut of turbot larvae and the larval survival rate. During both experiments, all replicates followed nearly the same rate of bacterial development in the gut of turbot larvae going from circa 10<sup>2</sup> CFU larva<sup>-1</sup> just before first feeding at day 3 post hatch to 10<sup>5</sup> CFU larva<sup>-1</sup> at day 9 post hatch.In total, 127 bacterial isolates from 12... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aerobic bacteria; Aquaculture; Commensals; Digestive system; Fish culture; Fish larvae; Gastrointestinal tract; Microorganisms; Rearing; Scophthalmus maximus; Survival; Bacteria; Scophthalmus maximus; Vibrio mediterranei. |
| Ano: 2001 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=5720 |
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| Cavalli, R.O.; Lavens, P.; Sorgeloos, P.. |
| The breeding frequency, fecundity, egg hatchability, larval output and viability of pond-reared, mature <i>Macrobrachium rosenbergii</i> females were individually followed up during 180 d. Sexually mature prawns were maintained under controlled laboratory conditions (28.7 C and 12-h light/d) in a 190-L freshwater recirculation system and fed a formulated diet. Ovarian development, moulting and spawning events were checked daily. At least six consecutive moults were recorded for each of the 18 females. The duration of the intermoult period averaged 27.5 d and was not affected by ovarian development or spawning, but intermoult periods followed by spawning had significantly lower growth rates. From a total of 126 moulting events recorded, egg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fecundity; Moulting; Prawn culture; Rearing; Recirculating systems; Reproductive cycle; Macrobrachium rosenbergii. |
| Ano: 2001 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=8494 |
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| Souza,Thamyrys B.; Maia,Artur C.D.; Albuquerque,Cleide M.R.; Iannuzzi,Luciana. |
| Adults of Cyclocephala distincta are flower visitors of Neotropical palms (Arecaceae) and commonly found in the Atlantic Forest of Pernambuco, Brazil. Males and females were collected in the wild and subjected to captive rearing and breeding. The egg hatching rate, the life cycle, longevity of immatures and adults, and oviposition parameters in captivity were analyzed. The average duration of the life cycle of C. distinctawas 108.2 days (n = 45). The egg stage lasted on average 10.9 days, and the egg-hatching rate was 73.9%. The immature stage lasted on average 93.4 days. The larvae stage exhibited negative phototaxis, and the size of their head capsules increased at a constant rate of 1.6 between instars, following Dyar's rule. The average duration of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Life cycle; Rearing; Thanatosis. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000100037 |
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| Scherrer,Marcus V.; Aguiar,Alexandre P.. |
| ABSTRACT Mantises can live for many months, are naturally voracious, and feed invariably on live prey. Many species have a propensity for cannibalism and cannot be kept together for most of their life cycle, which makes large-scale rearing typically time-consuming, thus easily becoming prohibitive. This is particularly true for early instars, because they are the most abundant stage of a developmental cohort. Such limitation hinders research on Mantodea which depend on live individuals, such as behavior, physiology, ontogeny, and others. In this work, a simple, low-maintenance “self-service” device is described, which is greatly effective in reducing the time needed for keeping live, individual, small to medium-sized mantises. Trial and error usage and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mantodea; Praying mantis; Rearing; Captive breeding; Cannibalism. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262019000400316 |
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| Souza,Karina Márcia Ribeiro de; Faria,Douglas Emygdio de; Nakagi,Vanessa de Souza; Carão,Ágatha Cristina de Pinho; Pacheco,Bruna Helena Carvalho; Trevisan,Renata Barbieri; Gomes,Gilson Alexandre. |
| The objective of this study was to evaluate the effect of the supplementation of xylanase in diets with reduced energy level on the apparent metabolizable energy corrected for nitrogen, determined with laying hens at 14, 36, 60 and 80 weeks of age. Four digestibility trials were conducted, using 80 Hy-line W36 laying hens aged 14, 36, 60 and 80 weeks of age. Birds were distributed in a completely randomized design in 2 × 2 factorial arrangement (energy level × inclusion of xylanase), totaling four treatments with 10 replicates of two birds each. Treatments were: positive control (balanced diet for their age); positive control + xylanase; negative control (diet with reduction of 100 kcal/kg in the level of metabolizable energy); and negative control +... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corn; Energy reduction; Metabolizability coefficient; Rearing. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001200008 |
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| Inácio,Jonas Gomes; Ferreira,Marcelo de Andrade; Silva,Randerson Cavalcante; Silva,Janaina de Lima; Oliveira,Júlio César Vieira de; Santos,Djalma Cordeiro dos; Soares,Luciana Felizardo Pereira; Campos,José Maurício de Souza. |
| ABSTRACT The objective of this study was to evaluate the effect of different concentrate levels (40, 50, 60, and 70% on dry matter basis) on intake, digestibility of nutrients, and performance of heifers fed sugarcane bagasse as exclusive roughage. Twenty Girolando heifers, with an average body weight of 198±25.6 kg were assigned to a completely randomized design, established according to body weight. The intake of dry matter (5.12 to 7.73 kg d-1), organic matter (4.72 to 7.32 kg d-1), crude protein (0.71 to 1.05 kg d-1), and digestible organic matter (3.09 to 4.77 kg d-1) linearly increased with the inclusion of concentrate in the diets. The final weight (238 to 299 kg d-1), body weight gain (0.50 to 1.20 kg d-1), and total weight gain (35.2 to 83.6 kg... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Agro-industrial waste; Digestibility; Intake; Morphometry; Rearing; Semiarid. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000100080 |
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| Mendonça,Bruno Pietsch Cunha; Lana,Rogério de Paula; Mancio,Antonio Bento; Detmann,Edenio; Barbosa,Analívia Martins; Guimarães,Geicimara. |
| It was evaluated several levels of mineral mixture and urea for crossbred heifers, with Gyr predominance, in the dry season period in Zona da Mata region in Minas Gerais. The experiment was carried out in a Brachiaria decumbens pasture area, divided in five paddocks of 3.5 hectares. It was used 35 heifers distributed in a 2 õ 2 + 1 factorial scheme, composed of two levels of urea (10 and 25%), two levels of mineral salt (10 and 25%) and a control diet (only mineral salt), totaling five diets, each one evaluated with seven replicates. The supplements were based on ground corn, urea, ammonia sulfate and mineral mixture with 32 to 72% crude protein, and they composed the following diets: MM ( mineral mix), 10:10 (10% mineral mix, 10% urea and 80% corn); 10:25... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen supplement; Rearing; Weight gain. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001000025 |
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| Sivilai Sirimungkararat; Weerasak Saksirirat; Duenpen Wongsorn; Sumeth Maskhao. |
| Eri silkworm (Samia ricini D.) is an important wild silkmoth of world textile industry, this study experiments on the increasing yield of eri silkworm using 3 commercial lines of castor (Ricinus communis) TCO101, 207 and 208 in comparison with indigenous castor line (InL) and CaKKU1 line. The eri silkworm fed with each line had similar period of life cycle lasting 52-72 days. Survival percentage of eri silkworm when fed with castor TCO101 and CaKKU1 was the highest with 93.33% (larva-adult) and statistically different (P<0.05) to others. Using TCO101, the eri silkworm yields such as 5th instar larval weight, fresh cocoon weight, pupa weight, shell weight,percent of cocoon shell, total shell weight, fresh cocoon weight/10,000 larvae were 8.2530 g, 3.3799... |
| Tipo: PhysicalObject |
Palavras-chave: Castor; Commercial line; Varieties; Rearing; Eri silkworm; Egg yields; Survival percentage; Pupa weight; Shell weight; Hatching egg; ใบละหุ่ง; สายพันธุ์การค้า; พันธุ์; การเลี้ยงไหม; ไหมอีรี่; ผลผลิตไข่; เปอร์เซ็นต์เปลือกรัง; เปอร์เซ็นต์น้ำหนักรัง; เปอร์เซ็นต์ไข่ฟัก; น้ำหนักดักแด้. |
| Ano: 2013 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5805 |
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| Sivilai Sirimungkararat; Weerasak Saksirirat; Duenpen Wongsorn; Chanapat Buamuangphia. |
| Comparison of eri silkworm rearing by using different major food plants, different lines of kesseru(Heteropanaxfragrans); Thai and Indian lines, and cassava Rayong 72 was conducted. The results showed that eri silkworm fed with kesseru leaves and cassava leaves has similar life cycles, 57-73 days and 53-73 days, respectively. Using Indian kesseru, larval (1-5 instar) and adult survival rates were 100%. Cocoon yield obtained from feeding with Rayong 72 was significantly higher (P<0.05) than feeding with both 2 lines of kesseru. However, average yields of fresh cocoon, pupa weight, %cocoon shell, total shell weight and fresh cocoon weight/10,000 larvae derived from cassava feeding were 2.2312 g, 1.9029 g, 14.37%, 9.52 g, and 22.31 kg, respectively, and... |
| Tipo: PhysicalObject |
Palavras-chave: Kesseru; India line; Thai line; Heteropanax fragrans; Cassava; Animal feeding; Rearing; Eri silkworm; Egg yields; Survival percentage; Pupa weight; Shell weight; Hatching egg; พระเจ้าร้อยท่า; สายพันธุ์อินเดีย; สายพันธุ์ไทย; มันสำปะหลัง; การให้อาหาร; ไหมอีรี่; ผลผลิตไข่; เปอร์เซ็นต์เปลือกรัง; เปอร์เซ็นต์น้ำหนักรัง; เปอร์เซ็นต์ไข่ฟัก; น้ำหนักดักแด้. |
| Ano: 2013 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5818 |
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| Registros recuperados: 62 | |
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