The aim of this study was to evaluate the sensory, chemical and microbiological changes in the mantle of giant squid (Dosidicus gigas) with skin (CP) and without skin (SP) stored on ice (0 ± 1 ºC) for 19 days and refrigerated (5 ± 1 ºC) for 8 days. Chemical evaluation was performed by analysing trimethylamine nitrogen (N-TMA), volatile base nitrogen (N-BVT), hypoxanthine/adenosine monophosphate ratio (Hx/AMP), pH, biogenic amines, and microbiological evaluation by the count of mesophilic, psychrophilic and enterobacteria bacteria. Sensory characteristics evaluated were odour (raw and cooked), flavour, texture, and general acceptability. Principal Component Analysis (PCA) and Pearson's Correlation (p<0.05) were used to find the association between sensory impairment and chemical or microbiological analyses. It is concluded that the analyses of Log(Put+Cad+Hist), Log (Psychrophile...

El objetivo del estudio fue evaluar las características biológicas, fisicoquímicas y tecnológicas relacionadas del tiburón azul Prionace glauca. Se trabajó con 128 especímenes para determinar sus propiedades biológicas, tecnológicas y 27 ejemplares para sus características fisicoquímicas. Se registraron los datos biométricos de longitud y peso (142 a 281 cm y 10.5 a 93.0 kg para machos; 153.5 a 255.0 cm y 14.5 a 80.0 kg para hembras), índice de alometría (machos 3.27 y hembras 2.87), potencial tecnológico mediante diferentes tipos de rendimientos (RED: 83.9±0.03%, RESV: 67.2±0.04%, RSCV: 48.9±0.07% y RPC: 33.5±0.07%) y capacidad de retención de agua en el músculo (16.1±0.03%). Dentro de las características fisicoquímicas se analizó la composición química proximal (proteína 21.8±0.23; grasa 0.6±0.03; humedad 78.0±0.31; ceniza 1.3±0.01) y los minerales (Cu: ...

            The aim of this study was to improve the functional properties of anchovy surimi by adding giant squid arm surimi. Texture and colour characteristics of six proportions of giant squid arm surimi / anchovy surimi (0/100, 20/80, 40/60, 50/50, 70/30, 100/0) were evaluated. The results showed that the texture characteristics of the gel and colour improved considerably for the mixture of surimi with 70/30, obtaining 522.2 g of hardness, 8.2 mm of elasticity, 429.5 g * cm of gel strength, and the values of L* and a* were 74.30 and -0.85, respectively. This result indicates that the 70/30 mixture of surimi with 70/30 is the best proportion to improve the texture and colour properties of the anchovy surimi gel. The optimal ratio was corroborated by linear programming, where an improvement in the price of anchovy surimi was obtain...

            The aim of this study was to improve the functional properties of anchovy surimi by adding giant squid arm surimi. Texture and colour characteristics of six proportions of giant squid arm surimi / anchovy surimi (0/100, 20/80, 40/60, 50/50, 70/30, 100/0) were evaluated. The results showed that the texture characteristics of the gel and colour improved considerably for the mixture of surimi with 70/30, obtaining 522.2 g of hardness, 8.2 mm of elasticity, 429.5 g * cm of gel strength, and the values of L* and a* were 74.30 and -0.85, respectively. This result indicates that the 70/30 mixture of surimi with 70/30 is the best proportion to improve the texture and colour properties of the anchovy surimi gel. The optimal ratio was corroborated by linear programming, where an improvement in the price of anchovy surimi was obtain...

Sludge residue from pumping water treatment obtained by electrocoagulation process (LEC) in fishmeal factories, was used as a feeding ingredient for Tenebrio molitor larvae. LEC was conditioned by three bioprocesses: fermentation with Lactobacillus casei, fermentation with Sacharomyces, and hydrolysis with pancreatin enzymatic mixture. Soybean isolate was used as a control. Larvae consuming LEC-containing diets presented a higher weight gain rate than the controls. The proximal larvae dry basis composition values of fat, ash, and protein (37.2% ± 2%, 3.9% ± 0.4%, and 50.2% ± 4.9%, respectively) did not present significant intergroup differences. LEC contained 4.2% aluminum and its conditioning through fermentation with lactic bacteria reduced its bioavailability in the larvae, with values similar to those of controls (3.9 ± 0.7 µg Al/g). The iron content in LEC-fed larvae was higher...

Giant squid adults of both sexes were used in different seasons. Grounded meat of each one were used to determine proximate composition, ammoniacal nitrogen, trimethyl amine contents, and viscosity. Simultaneously, surimi was prepared from each specimen to measure its gel strength. The moisture and protein values were between 81.2–86.9 and 10.5–16.4% respectively. They showed significant variations during summer in both sexes. The moisture: protein ratio was significantly lower in summer, showing greater variabilityamong males. When protein is transformed to a dry basis, differences between sexes are observed in winter and spring. Ammonia nitrogen was about 310.0 mg% and trimethylamine content was below 3.0 mg%. The apparent viscosity and gel strength values were significantly lower during winter, presenting males the lowest average values.