Evaluación del recurso pulpo octopus mimus en las islas Lobos de Afuera, Lambayeque

Evalúa la situación en las islas Lobos de Afuera durante el período del 10 al 13 de diciembre de 2001, respecto a la gran presión pesquera por parte de buzos y marisqueros de Lambayeque y de Piura (Sechura), que hace peligrar la explotación sostenible del recurso pulpo. En ese sentido, el laboratorio costero llevó a cabo la verificación en la zona (lugar donde esta especie bentónica presenta gran abundancia) a fin de obtener datos biométricos y biológico-pesqueros que permitan determinar el estado del pulpo y recomendar, en base a ello, medidas de ordenamiento pesquero para evitar la depredación de la especie.

Aspectos reproductivos del pulpo (Octopus mimus) en el área de Callao

Brinda información sobre los resultados de la estimación de la talla media de primera madurez y desove, así como la determinación del ciclo reproductivo del pulpo Octopus mimus. Los datos utilizados corresponden a muestreos de la pesquería artesanal en el área del Callao entre enero 1998 y enero 1999.

Islas Lobos de Afuera: Evaluación de pulpo Octopus mimus Gould, 1852 y percebes Pollicipes elegans (Lesson, 1831), Lambayeque, 2010

La distribución de tallas de pulpo fluctuó entre 40 y 200 mm de longitud del manto. El peso promedio fue 588,20 g, el 85% de los ejemplares no superó el peso mínimo de extracción (1 kg). En hembras predominaron estadios en desarrollo (63%), madurez total (16%); en machos predominaron estadios en desove (64%) y maduros (28%). La mayor concentración del recurso se registró al norte de la isla El Ladrón y frente a isla Quita Calcal. Las tallas de percebes fluctuaron entre 1 y 40 mm de longitud carina-rostral (Lcr), 55% de ejemplares estuvieron maduros. El percebes estuvo distribuido en el intermareal rocoso entre 6°56’9’’S y 6°57’30,6’’S en un área de 887,50 m2. La biomasa se estimó en 3,06 t ±27,18% y la población en 0,42 millones de individuos ±47,30%; el stock de juveniles (<17 mm) fue 0,17 millones de ejemplares; el stock adulto (≥17 mm) estuvo constituido por 0,24 millones de individuos y 2,90 t de la biomasa.

Short-term evaluation of the pulpo-dentin complex response to a resin-modified glass-ionomer cement and a bonding agent applied in deep cavities

Objectives. To evaluate the response of the pulpo-dentin complex following application of a resin-modified glass-ionomer cement or an adhesive system in deep cavities performed in human teeth.Methods. Deep class V cavities were prepared on the buccal surface of 26 premolars. In Group I the cavity walls (dentin) and enamel were conditioned with 32% phosphoric acid and the dentin adhesive system One Step (Bisco, Inc., Itasca, IL, USA) was applied. In Groups 2 and 3, before total etching and application of bonding agent, the cavity floor was lined with the resin-modified glass-ionomer cement-Vitrebond (3M ESPE Dental Products Division, St. Paul, MN, USA) or the calcium hydroxide cement-Dycal (control group, Dentsply, Mildford, DE, USA), respectively. The cavities were restored using light-cured Z-100 composite resin (3M ESPE). The teeth were extracted between 5 and 30 days and prepared for microscopic assessment. Serial sections were stained with H/E, Masson's trichrome, and Brown and Brenn techniques.Results. In Group 1, the inflammatory response was more evident than in Groups 2 and 3. Diffusion of dental material components across dentinal tubules was observed only in Group 1, in which the intensity of the pulp response increased as the remaining dentin thickness decreased. Bacteria were evidenced in the lateral walls of two samples (Group 2) which exhibited no inflammatory response or tissue disorganization.Conclusions. Based on the experimental conditions, it was concluded total acid etching followed by application of One Step bonding agent cannot be recommended as adequate procedures. In this clinical condition the cavity walls should be lined with a biocompatible dental material, such as Vitrebond or Dycal. 2003 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.

Avaliação da força de preensão palmar plena e pulpo-lateral: relação com a antropometria da mão e posições de trabalho

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Engorde de pulpo (Octopus vulgaris) alimentado exclusivamente con boga (Boops boops) de descarte de la acuicultura

[EN] The use of low value fish (Bogue, Boops boops), accidentally reared in seabream culture cages, as a sole food in octopus farming was tested in two different experiments located in Canary Islands. In a first experiment two different initial sizes were compared: 1,5 kg & 2,3 kg, both at a density of 11 kg/m3. Initial density was increased in a second experiments to 16 kg/m3 testing two lower initial weights: 1,0 kg & 0,8 kg. Bogue as a single feed was found to be good enough to sustain a good growth in octopus cage rearing. Best growth in terms of specific growth rate and average daily growth was obtained with the lowest grow size, 0,8 kg.

Engorde de pulpo común Octopus vulgaris en jaulas en la comunidad Canaria [Material gráfico] [Recurso electrónico] : efecto de la dieta y la densidad inicial

Octopus vulgaris on-growing in floating cages is a promising activity implemented in Spain at industrial level, with productions of 16-32 tons/year from 1998. Nevertheless, some aspects of the culture system need to be evaluated to warrantee its profitability. In the present work absolute growth rate (AGR, g/day) and mortality (%) under two initial rearing densities, 10 and 17 kg/m3, were compared under two feeding regimes over 15 weeks. One diet was composed by bogue, supplied as ?discarded? species from local fish farms. The other diet was based on a 40-60% discarded bogue-crab Portunus pelagicus. Half of the reared octopuses were PIT-tagged and two sampling points were established along the experimental period. Regardless of dietary treatment, up to the 11th week, growth was 19 and 13 g./day for the low and high rearing density. On the other hand, up to the 11th week mortality was higher in the control diet fed group (30%), reaching 74-84% by the end of the experiment regardless of rearing density and dietary treatment, which could suggest some nutritional imbalance of the tested diets.

Pre-engorde de pulpo común Octopus vulgaris con 3 dietas basadas en descartes de acuicultura en la comunidad Canaria

On-growing of Octopus vulgaris fed different feeds has shown promising results. Nevertheless, since the minimum legal size for octopus fisheries in spain i sin most of experimental ongrowing of this species an average weight over 750-1000kg was utilized with g (and little research has been conducted in order to evaluate the effect of these diets on smaller individuals. The present work evaluates the effect of 3 diets based on bogue, obtained as ?discarded? species from local fish farms, on ingestion and growth of O. vulgaris weighing 400 g. The 1st diet was composed by discarded bogue, the 2nd diet by a 40-60% discarded bogue-crab Portunus pelagicus and the 3rd diet was presented as a moist diet based on discarded bogue. A triplicate of four octopuses per treatments, male:female 1:1, were kept in circular 400 l tanks and fed each diet for 4 weeks. Absolute growth rate (AGR, g./day), standard feeding rate (SFR, %/day) and feed efficiency (FE) were calculated. The addition of crab to the diet increased SFR which underlines different feeding habits when compared with 0.8-1 kg octopuses. Lower growth and higher FE was recorded with the moist diet, probably due to high disintegration of this kind of feed.

Evaluación de 2 sistemas de cultivo en pulpo común Octopus vulgaris en jaulas en la comunidad Canaria

Octopus vulgaris on-growing in floating cages is a promising activity implemented in Spain at industrial level, with productions of 16-32 tons/year from 1998. Nevertheless, some aspects of the culture system need to be evaluated to warrantee its profitability. In the present study two rearing systems and two dietary treatments were evaluated. Individual and group rearing, in PVC net compartments and floating cages respectively, were compared under two dietary treatments. One diet was composed by bogue, supplied as ?discarded? species from local fish farms, and the other was based on a 40-60% discarded bogue-crab Portunus pelagicus. All octopuses were PIT-tagged and the experiment lasted two months. Animals were sampled once throughout the experimental period and absolute growth rate (AGR, g./day) and mortality (%) were calculated. AGR of group rearing was above 30 g./day, however individual rearing showed 100% survival so biomass increment was higher. On the other hand, males grew more than females regardless of dietary treatment.

Utilización de cangrejo y harinas en un pienso para pulpo común Octopus vulgaris

The present work evaluates whether the addition of 2 species of crab (Portunus pelagicus and Grapsus grapsus) as attractants (10%) in experimental moist diet based in discarded bogue (Boops boops) may increase ingestion and growth in O. vulgaris. Besides, another diet based on flour, made from discarded bogue and G. grapsus, was tested. Finally, a 40-60% discarded bogue-crab P. pelagicus was provided as a control diet. Four male octopuses, kept The present work evaluates whether the addition of 2 species of crab (Portunus pelagicus and Grapsus grapsus) as attractants (10%) in experimental moist diet based in discarded bogue (Boops boops) may increase ingestion and growth in O. vulgaris. Besides, another diet based on flour, made from discarded bogue and G. grapsus, was tested. Finally, a 40-60% discarded bogue-crab P. pelagicus was provided as a control diet. Four male octopuses, kept in PVC net cages in the same tank, were fed each diet for 8 weeks and several parameters were calculated: absolute growth rate (AGR, g./day), standard feeding rate (SFR, %/day) and feed efficiency (FE). The addition of crab to the diet under the conditions described did not improve ingestion, growth or feed efficiency in this species, while the flour based diet generated negative growth.

Optimización de las condiciones de engorde y avances en el conocimiento de los requerimientos nutricionales de pulpo común Octopus vulgaris (Cuvier, 1797)

Programa de Doctorado, Acuicultura: Producción controlada de animales acuáticos