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| Registros recuperados: 170 | |
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| ALBERTONI,E. F.; PALMA-SILVA,C.; ESTEVES,F. A.. |
| The northern part of the state of Rio de Janeiro shelters many coastal lagoons, located, mostly, in the "restinga" strip that stretches from the municipality of Macaé to the municipality of Quissamã. During 1995 and 1996 samplings were made aiming to verify the diversity and density of Natantia larvae in the Imboassica, Cabiúnas and Comprida lagoons. The monthly samples were taken with a 500 µ net, in horizontal drags from a boat. In Comprida lagoon no larvae of any family of these crustaceans were found. In Cabiúnas lagoon, the autumn was the season of the year with greatest relative abundance, the larvae belonging to only one genus: Macrobrachium. In Imboassica Lagoon samples were taken in two situations related to the variation of the water level and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coastal lagoons; Larvae; Penaeidae; Palaemonidae; Crustacea; Distribution. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100014 |
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| Almanza Valenzuela, Enrique Iván. |
| El gusano rojo de maguey es un recurso atractivo para los colectores y acopiadores que lo comercian en mercados y restaurantes a precios elevados, explotando las poblaciones silvestres sin un programa de manejo, esto ha causado reducción tanto de la planta de maguey como del insecto, por lo que es indispensable generar conocimientos que permitan realizar un mejor aprovechamiento de este recurso. En este trabajo se obtuvieron larvas de primer instar al incubar huevos en condiciones de laboratorio y se definieron aspectos básicos de biología y comportamiento de Comadia redtenbacheri, para lograr el establecimiento y desarrollo de su fase larvaria en plantas de maguey mantenidas en condiciones de invernadero. Los mejores niveles de infestación se... |
| Tipo: Tesis |
Palavras-chave: Gusano rojo de maguey; Agave salmiana; Insectos comestibles; Larvas; Maestría; Entomología y Acarología; Agave red worm; Edible insects; Larvae. |
| Ano: 2007 |
URL: http://hdl.handle.net/10521/1277 |
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| Andres Aranda-burgos, Jose; Da Costa Gonzalez, Fiz; Novoa, Susana; Ojea, Justa; Martinez-patino, Dorotea. |
| Successful bivalve larval growth and survival depend on stored reserves provided by diet. The aim of this study was to evaluate the effects of microalgal diet on growth, survival, together with biochemical and fatty acid composition during larval development in grooved carpet shell (Ruditapes decussatus). Four mono- and multi-species diets were tested: (1) Isochrysis galbana, Pavlova lutheri and Chaetoceros muelleri (1:1:1, IPC); (2) I. galbana, P. lutheri and C. muelleri (1:1:2, IP2C); (3) I. galbana and P. lutheri (1:1, IP); (4) C. muelleri (C). Our results showed that feeding regime greatly influenced larval growth and survival, as well as biochemical and fatty acid composition. Higher growth and survival rates were observed in the IPC, IP2C and C... |
| Tipo: Text |
Palavras-chave: Ruditapes; Decussatus; Larvae; Diets; Biochemistry; Fatty acids. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00161/27261/25470.pdf |
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| Arnaud, Christophe; Faury, Nicole; Bouquet, Jean-paul; Guesdon, Stephane. |
| Monitoring of reproduction in the oyster Crassostrea gigas, and more particularly in the mussel Mytilis edulis were conducted, in the Marennes-Oléron Bay each year, from June to September. This report gives the main results obtained in 1997, 1998, 1999,2000 and compares the results between years. It also summarises the fishing techniques used and gives information on larval development in the annexes. NOT CONTROLLED OCR |
| Tipo: Text |
Palavras-chave: Marennes Oléron; Larvae; Reproduction; Mussel; Oyster; Marennes Oléron; Larves; Reproduction; Moule; Huître. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/2000/rapport-3883.pdf |
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| Arzul, Isabelle; Langlade, Aime; Chollet, Bruno; Robert, Maeva; Ferrand, Sylvie; Omnes, Emmanuelle; Lerond, Sophie; Couraleau, Yann; Joly, Jean-pierre; Francois, Cyrille; Garcia, Celine. |
| Bonamia ostreae is an intracellular protistan parasite affecting flat oysters Ostrea edulis. It can be detected in juveniles but mortalities mainly affect oysters which are more than 2 years old. The parasite is usually observed inside haemocytes and sometimes free, notably in gill epithelia suggesting a parasite release through this organ. However, the infective form and ways of entry and release remain undetermined. Flat oysters incubate their larvae in their pallial cavity for 8–10 days before releasing them into the water column. Flat oysters in Bay of Quiberon in South Brittany (France) are known to be infected with B. ostreae since 1979 and is the most important area in France for O. edulis spat collection. Flat oysters incubating larvae were sampled... |
| Tipo: Text |
Palavras-chave: Bonamia ostreae; Flat oyster; Ostrea edulis; Transmission; Larvae; Parasite life cycle. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00028/13898/12566.pdf |
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| Baccus, H.; Ramsaha, S.; Rathacharen, S.; Hassea, R.; Auliar, I.; Codabaccus, B.. |
| The silver sea bream (Rhabdosargus sarba), has great commercial value in Mauritius. The species is a potential candidate for aquaculture. The sea bream, a winter spawner, was successfully induced to breed in captivity with HCG (Human Chorionic Gonadotropin) hormone injection (250 IU/kg body weight) in 1989 at the Albion Fisheries Research Centre. In 1997, the Coastal Fisheries Resources and Environment Conservation Project of Japanese International Cooperation Agency (JICA) was launched to enhance the stock of the silver sea bream in the lagoon. This species breeds under hatchery conditions during the spawning season. Annually, the hatchery-produced sea bream fingerlings, of 2.0 to 2.5 cm body length, were released in the coastal areas. The larval rearing... |
| Tipo: Journal Contribution |
Palavras-chave: Rhabdosargus sarba; Aquaculture techniques; Larval development; Aquaculture techniques; Larvae; Http://aims.fao.org/aos/agrovoc/c_28992; Http://aims.fao.org/aos/agrovoc/c_4204. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1064 |
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| Barros,Helenice P; Valenti,Wagner C. |
| Feeding behavior of the larvae's prawn, Macrobrachium rosenbergii De Man, 1879, in each stage of development was studied face alArtemia Linnaeus, 1758 nauplii, dry and wet diets. Groups of ten larvae in each stage were placed in 500 ml beakers at 29ºC in filtered brackish water. After the fasting period of acclimatization, the three types of food were offered separately to the larvae and the feeding behavior was observed during 30 min. Feeding perception, capture, grasp and ingestion of food were used to determine feeding pattern. Stage I lawac do not eat. The feeding behavior of larvae was similar on the stages II - XI. The perception in distance does not occur in most individuais; the feeding process generally started with the physrcal contact of food... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Macrobrachium rosenbergii; Larvae; Feeding behavior. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000400003 |
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| Beiras, Ricardo; His, Edouard. |
| The effects of mercury (Hg) concentrations ranging from 0 (control) to 1024 µg 1-1 upon embryogenesis, survival, growth and metamorphosis of Crassostrea gigas (Thunberg) oyster larvae were investigated. Embryogenesis was abnormal in 50 % of the individuals at 11 µg 1-1 . The 48 h LD50 for D·shaped, umbonate and pediveliger larvae were 33, 115 and 200 µg 1-1 respectively. The increase in LD50 was partially explained by the larval weight increase, although weight-specific tolerance to Hg was higher in smaller larvae. Growth, the most sensitive physiological process studied, was significantly retarded at 4 µg 1-1. The metamorphosis rate was significantly reduced when competent pediveligers were exposed to 64 µg 1-1 for 48 h prior to the addition of the... |
| Tipo: Text |
Palavras-chave: Mercury; Oyster; Larvae; Embryo; Bioassay; Ecotoxicology; Crassostrea gigas. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00037/14867/12191.pdf |
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| Beiras, Ricardo; His, Edouard. |
| The effects of Hg concentrations ranging from 0 (control) to 1024 µg 1-1 upon embryogenesis, survival and growth of Mytilus galloprovincialis mussel larvae were investigated . Embryogenesis was abnormal in 50 % of the individuals at 10µg 1-1. The 48 h LC50 for D-shaped, early umbonate, late umbonate and eyed larvae were 51, 164, 322 and 383 µg 1- 1 respectively. The LC50 was an allometric function of ash-free dry weight with exponent b = 0.60. Larval growth was significantly reduced alter 6 d exposure to 4 µg Hg 1-1 and alter 10 d exposure to 2 µg 1-1. No significant differences in lethal or sublethal sensitivity to Hg were found between M. galloprovincialis and previously studied Crassostrea gigas embryos and larvae. The implications of these findings for... |
| Tipo: Text |
Palavras-chave: Mercury; Mytilus galloprovincialis; Mussel; Larvae; Growth; Embryonic development; Bioassay; Ecotoxicology. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00037/14868/12192.pdf |
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| Ben Kheder, Rym; Moal, Jeanne; Robert, Rene. |
| The effect of four temperatures, ranging between 17 degrees C and 32 degrees C, was studied on development and lipid reserve management of Crassostrea gigas larvae. No effect of temperature was found on larval mortality, as high survival (>90%) was recorded before competence at all temperatures studied. Temperature did, nonetheless, have a strong effect on growth and settlement success. At low temperature (17 degrees C), larvae competent to metamorphose were only observed from day 23 and only a low percentage finally achieved metamorphosis (12%). The opposite was seen at temperatures >= 27 degrees C: larval competence appeared at day 18 and led to high rates of metamorphosis (60-90%). This difference at settlement seemed to be linked to larval... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Larvae; Growth; Metamorphosis; Temperature; Lipids; Physiological indices. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00019/13046/10146.pdf |
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| Ben Kheder, Rym; Quere, Claudie; Moal, Jeanne; Robert, Rene. |
| In the natural environment bivalve larvae are exposed to variable conditions and can therefore face periods of food shortage. To understand the resistance of early life stages of Pacific oyster (Crassostrea gigas), larvae were experimentally starved for 4 days at different periods of their development, and the resulting variations in their lipid reserves then analysed using image analysis and biochemical techniques. Faced with a temporary lack of food, the larvae halted their growth in size and weight and started to live off their lipid reserves; this effect was highly marked when the period of food deprivation was at the beginning of larval rearing, but was less marked when food deprivation was after day 14. The larvae conserved their developmental... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Larvae; Growth; Metamorphosis; Starvation; Lipids. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00018/12906/10145.pdf |
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| Registros recuperados: 170 | |
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