Red Porgy Pagrus Research Articles

QUALIDADE DA CARNE MECANICAMENTE SEPARADA (CMS) E DO SURIMI OBTIDOS DE PEIXES DE BAIXO VALOR COMERCIAL

Este estudo teve como objetivo analisar a qualidade e as diferenças entre a carne mecanicamente separada (CMS) e surimi obtidos a partir de pargo (Pagrus pagrus) e o tira-vira (Percophis brasiliensis) capturados na categoria "mistura” da modalidade da pesca de arrasto de Niterói, RJ. Para elaboração do surimi, as CMS de pargo e tira-vira foram submetidas í­Â lavagem. A caracterização quí­­mica dos produtos foi determinada pelas análises da composição quí­­mica (umidade, proteí­­na,lipí­­deos e cinzas). Para as análises microbiológicas foram realizadas contagens de Estafilococos coagulase positiva, coliformes a 35 °C, coliformes termotolerantes e pesquisa de Salmonella sp. Os surimis de pargo e tira-vira apresentaram menores teores proteico (7,84% e 7,34%) e lipí­­dico (0,73% e 0,74%) e maior umidade (91,71% e 90,15%), respectivamente, em comparação í­Â CMS (P<0,05). A análise microbiológica demonstrou que os produtos estavam dentro do padrão sanitário exigido pela legislação. Com base nos resultados obtidos, conclui-se que os peixes de baixo valor agregado da categoria "mistura” resultaram em produtos (CMS e surimi) viáveis para o uso na tecnologia do pescado. O produto CMS apresentou-se mais rico nutricionalmente do que o surimi, porém com maior carga bacteriana.

Feeding habits of 2 reef-associated fishes, red porgy (Pagrus pagrus) and gray triggerfish (Balistes capriscus), off the southeastern United States: suppl. tables 1 and 2

Feeding habits of 2 reef-associated fishes, red porgy (Pagrus pagrus) and gray triggerfish (Balistes capriscus), off the southeastern United States: suppl. tables 1 and 2

Sedation of red porgy (Pagrus pagrus) and black sea bass (Centropristis striata) using ketamine (K), dexmedetomidine (D) and midazolam (M) delivered via intramuscular injection

Handling and restraint of large teleost fish in public aquaria presents significant logistical and safety challenges and research into effective injectable anesthetic protocols has been limited. A combination protocol of ketamine (K), dexmedetomidine (D) and midazolam (M) injected intramuscularly was evaluated at several dose combinations in red porgy ( Pagrus pagrus ) and black sea bass ( Centropristis striata ). The response of red porgy was extremely variable, and even at the lowest dose tested (1 mg/kg K/0.025 mg/kg D/0.2 mg/kg M), multiple fish exhibited a severe, often fatal lactic acidosis. The protocol was effective in black sea bass, and the fish were consistently sedated and easily handled when anesthetized with 2 mg/kg K/0.05 mg/kg D/0.2 mg/kg M or with 4 mg/kg K/0.1 mg/kg D/0.2 mg/kg M. All black sea bass recovered well following reversal of the dexmedetomidine with atipamezole and no long-term negative effects were seen. This protocol appears to be a safe and effective approach to sedating demersal teleosts to facilitate handling and movement.

Shift in Trophic Level of Mediterranean Mariculture Species

The mean trophic level of the farmed fish species in the Mediterranean has been increasing. We examined the farming-up hypothesis (i.e., the increase in the production of high-trophic-level species) in the Mediterranean by determining the trophic level of the aquafeeds (i.e., what the fish are fed) of 5 species of farmed marine fishes: common dentex (Dentex dentex), common pandora (Pagellus erythrinus), European seabass (Dicentrarchus labrax), gilthead seabream (Sparus aurata), and red porgy (Pagrus sp.). The mean trophic level of aquafeed used in mariculture from 1950 to 2011 was higher (3.93) than the prey farmed fish consume in the wild (3.72) and increased at a faster rate (0.48/decade) compared with that based on their diets in the wild (0.43/decade). Future expected replacement of the fishmeal and oil in aquafeeds by plant materials may reverse the farming-up trend, although there are a number of concerns regarding operational, nutritional, environmental, and economic issues. The farming-up reversal can be achieved in an ecologically friendly manner by facilitating the mariculture of low-trophic-level fishes and by promoting high efficiency in the use of living marine resources in aquafeeds.

Whole-Genome Sequence of the Fish Virulent Strain Streptococcus iniae IUSA-1, Isolated from Gilthead Sea Bream (Sparus aurata) and Red Porgy ( Pagrus pagrus )

Streptococcus iniae is a major fish pathogen that produces invasive infections that result in economic losses in aquaculture. In this study, the draft genome sequence of Streptococcus iniae strain IUSA-1, isolated from a natural outbreak affecting gilthead sea bream (Sparus aurata) and red porgy (Pagrus pagrus), is presented.

Broodstock feeding effects on spawning performances' (fertility, eggs and larvae quality) of the Mediterranean red porgy (Pagrus pagrus, Linnaeus 1758) during two years

Spawning in captivity of two broodstock groups of red porgy (Pagrus pagrus) of the same age was studied during two consecutive spawning seasons. These two broodstock groups, designed as A and B, were fed with different regimes during the spawning period. Group A was fed on moist pellet while group B was fed on fresh fish. Total number of collected eggs was 22 and 36 million respectively for groups A and B during the first year. Fecundity was 474,966 and 769,186 eggs kg-1 female respectively. During the second year, total number of collected eggs was only 5 million for group A and 32 million for group B. The fecundity was 192,094 and 1.1 million eggs kg-1 female respectively. Statistically, there was a significant difference between the slopes of the two groups in terms of quantity and quality of spawning and larval survival recorded on the second and fifth day after hatching. The viable egg rate was positively correlated with the second day larval survival, which in turn was significantly correlated with hatching egg rate. These data showed that time of collecting eggs for incubation, does not affect hatching rate and larvae survival rate. Key words: Pagrus, red porgy, spawning, egg quality, fertility.

Disinfection of Gilthead Sea Bream (Sparus aurata), Red Porgy (Pagrus pagrus), and Common Dentex (Dentex dentex) Eggs from Sparidae with Different Disinfectants

The aim of this study is to determine suitable conditions for egg disinfection of gilthead sea bream (Sparus aurata), red porgy (Pagrus pagrus), and common dentex (Dentex dentex) with glutaraldehyde, hydrogen peroxide and iodine. The eggs were disinfected with 200 ppm glutaraldehyde (T= 2, 4, 8, 16 min), 300 ppm hydrogen peroxide and iodine (T= 5, 10, 15, 20 min) at four different contact times. The hatching rate was determined in triplicates for each treatment. Also, bacteria colonies were counted on tryptic soy agar (TSA) and thiosulphate citrate bile salt sucrose agar (TCBS). At the end of the experiment, bacterial load and hatching rate were assessed together. For glutaraldehyde treatment, optimal hatching rates and bacterial colonies were estimated as CT (Disinfectant concentration in mg.l exposure time in minute) 800 for sea bream eggs, CT 1600 for red porgy eggs and CT 800-1600 for common dentex eggs. Also, for hydrogen peroxide treatments, they were determined as CT 3000 for sea bream and red porgy and CT 4500 for common dentex. Finally, in iodine treatments, these parameters were measured as CT 4500-6000 for all species’ eggs. However, in our study, it is clear that the glutaraldehyde showed the optimum disinfection effect against the microorganisms because the bacteria could be eliminated completely.

Evaluation of visible implant elastomer (VIE) and passive integrated transponder (PIT) systems to tag fingerling of red porgy (Pagrus pagrus): Effects on growth, mortality and tag loss

Evaluation of visible implant elastomer (VIE) and passive integrated transponder (PIT) systems to tag fingerling of red porgy (Pagrus pagrus): Effects on growth, mortality and tag loss

Biological Performance of Red Porgy (Pagrus pagrus) Larvae under Intensive Rearing Conditions with the use of an Automated Feeding System

Pagrus pagrus is one of the promising species for the industry in the Mediterranean but its rearing is still far from satisfactory. In the present work, the conditions and results of larval rearing with the use of an automatic feeding system are presented. Eight populations were reared for 20 days with the ‘pseudo green water’ methodology in two successive trials. Larvae were fed enriched rotifers during the entire rearing period, a mixed diet of rotifers and Artemia (Instar I when larvae reached 5 mm in length, replaced by Instar II after larvae reached 5.5 mm) and a formulated diet (after day 16 post hatching). A computerized system for feeding management was used. A total of 388,000 eggs were incubated and after 20 days, 237,973 larvae (TL = 6.96 ± 0.17 mm) were produced with a survival rate of 61.4 ± 6.3%. Individuals grew in terms of wet weight with an exponential rate of 0.167 ± 0.008 daily (R2= 0.983) with no variations between replicates. Mean individual daily consumption at first feeding (day 4-post hatching), was 0.20 ± 0.06 mg of food (0.03 ± 0.01 dry weight), that is, 180–300 rotifers, while on day 20, consumption increased by 10 (2.081 ± 0.106 mg and 0.276 ± 0.014 in wet and dry weight, respectively). When compared with sea bream, consumption was higher by approximately 3–4-fold. The mean food conversion ratio of the experimental period was 4. In comparison with sea bream larviculture, food consumption of red porgy is higher, and a different feeding strategy is required to satisfy the requirements of the larvae.

Mortality Caused by Staphylococcus xylosus in Red Porgy (Pagrus pagrus) Fish

Padilla, D., Acosta, F., Rodríguez, F., Gómez. V., Déniz. S. and Real. F. 2001. Mortality caused by Staphylococcus xylosus in red porgy (Pagrus pagrus) fish. J. Appl. Anim. Res., 19: 203–208. In a group of experimental red porgy breeders from the Instituto Canario de Ciencias Marinas de Taliarte (Las Palmas, Spain), displaying haemorrhages and sudden death, Staphylococcus xylosus was isolated in pure culture from internal organs showing most prominent lesions of hepatitis and nephritis. Two trials were carried out to show the virulence of this isolated strain by two fish species, gilthead sea-bream (Sparus aurata) and red porgy (Pagrus pagrus). Similar clinicopathologic effects resulted from these trials and the red porgies used were the most affected fishes.

Analysis of Catch per Unit of Effort and Length Composition in the South Carolina Commercial Handline Fishery, 1976-1982

Abstract Catch-per-unit-of-effort (CPUE) data for catch/trip, catch/boat-day, and catch/reel-day for major demersal species groups were analyzed by season, boat length, and number of crew. Seasonality was a major component of variability in CPUE. There was no significant difference in catch/reel-day by boat length for any species group, while catch/boat-day increased with crew size for all species combined, groupers (Mycteroperca spp.), and vermilion snapper (Rhomboplites aurorubens). Correlations between catch/trip and catch/reel-day were good (r = 0.80-0.85) for red porgy (Pagrus pagrus), groupers, and red snapper (Lutjanus campechauus). Time trends in seasonally adjusted quarterly mean trip production were negative for all species groups, with significant correlations for red porgy, groupers, and red snapper. Estimates of annual maximum sustainable physical yield (MSY) calculated using a Schaefer model and parameter values from the negative regressions of catch/trip on the number of trips were approxim...