Author: Carlos Alfonso Álvarez González

Aclimatación en cautiverio del sargo Archosargus probatocephalus (Perciformes: Sparidae)

Carlos Alfonso Álvarez González (2018)

El sargo (Archosargus probatocephalus) es una especie prioritaria para el desarrollo de la maricultura en el sureste mexicano.

Article

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA Aclimatación maduración sexual reproducción desove larvas

FRESHWATER ROTIFER: (PART II) A LABORATORY STUDY OF NATIVE FRESHWATER ROTIFERS Brachionus angularis AND B. quadridentatus brevispinus FROM TABASCO

JEANE RIMBER INDY LENIN ARIAS RODRIGUEZ Gabriel Márquez Couturier Carlos Alfonso Álvarez González (2012)

This study is a first report of rotifer form the South of Mexico. The rotifers were collected from the fishponds arround Biological Division, UJAT and we examined their morphometric characters, cultivated and identified them. We conducted experiment at different salt concentrations tested at 0g L–1 water (no add NaCL), 2g L–1, 4g L–1, 6g L–1, 8g L–1, 10g L–1 water. The species were identified as Brachionus angularis Gosse (1851) characterized by having two anterior spines, which are almost invisible while B. quadridentatus brevispinus Ehrenberg (1832) with six anterior spines, which can be seen clearly. Lorica size of B. angularis and B. quadridentatus brevispinus are about 12.14 and 12.8 m, respectively and the size is much smaller than B. plicatilis (Mazatlan strain).

Article

BIOLOGÍA Y QUÍMICA

Effect of feeding frequency on growth and survival in juvenile gar Atractosteus tropicus Gill, 1863, in culture conditions

Leonardo Martínez Cárdenas Crisantema Hernández González Luis Daniel Espinosa Chaurand MIRIAM SORIA BARRETO Carlos Alfonso Álvarez González rafael martinez-garcia (2018)

"The gar, Atractosteus tropicus is a native fish distributed in fluvial systems of the Mexican southeast, which presents aquaculture potential in the food industry and as ornamental species. However, it is necessary to deepen the knowledge for the optimization of its culture. The present study examined the effect of three feeding frequencies on the growth, survival, and condition of juveniles. The fish (90) were placed in nine 35 L tanks, (n = 10; three replicates per treatment). The feed (44% protein, 15% fat) was supplied to 2% of the biomass, divided into 2, 4 and 6 servings throughout 10 h for eight weeks. After eight weeks the standard length, wet weight, survival, Fulton K, specific growth rate, nitrogen carbon rate, the coefficient of variation and size heterogeneity were recorded, which were analyzed with a one-way ANOVA. There were no significant differences among treatments for any of the response variables. The overall results indicated that in general both the culture conditions and the three food frequencies tested were adequate for the species. The results indicate the high flexibility of the species to be cultured with minimum requirements of the food supply, which can translate into the optimization of production costs."

Article

aquarium, pellets, condition, carbon, nitrogen rate, moisture content, aquaculture BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA ANIMAL (ZOOLOGÍA) NUTRICIÓN NUTRICIÓN

FRESHWATER ROTIFER: (PART II) A LABORATORY STUDY OF NATIVE FRESHWATER ROTIFERS Brachionus angularis AND B. quadridentatus brevispinus FROM TABASCO

JEANE RIMBER INDY LENIN ARIAS RODRIGUEZ Gabriel Márquez Couturier Carlos Alfonso Álvarez González (2012)

This study is a first report of rotifer form the South of Mexico. The rotifers were collected from the fishponds arround Biological Division, UJAT and we examined their morphometric characters, cultivated and identified them. We conducted experiment at different salt concentrations tested at 0g L–1 water (no add NaCL), 2g L–1, 4g L–1, 6g L–1, 8g L–1, 10g L–1 water. The species were identified as Brachionus angularis Gosse (1851) characterized by having two anterior spines, which are almost invisible while B. quadridentatus brevispinus Ehrenberg (1832) with six anterior spines, which can be seen clearly. Lorica size of B. angularis and B. quadridentatus brevispinus are about 12.14 and 12.8 m, respectively and the size is much smaller than B. plicatilis (Mazatlan strain).

Article

BIOLOGÍA Y QUÍMICA

Stressors Due to Handling Impair Gut Immunity in Meagre (Argyrosomus regius): The Compensatory Role of Dietary L-Tryptophan

GLORIA GERTRUDYS ASENCIO ALCUDIA Karl Andree Inmaculada Giráldez Díaz Dariel Tovar Ramírez Carlos Alfonso Álvarez González Marcelino Herrera Enric Gisbert (2019)

"In the context of intensive aquaculture, meagre (Argyrosomus regius) is one of the most important new aquaculture species in Southern Europe and several studies are focused on the optimization of its culture. Nevertheless, stressors such as handling during transport or culture maintenance may affect the immune system, thereby impairing some immune responses or provoking cellular damage. One strategy that has been used to avert this type of negative stress response is the supplementation of amino acids to improve resistance to stress. In this experiment, meagre (105.0 ± 2.6 g, mean ± standard deviation) juveniles were fed two diets for a period of 7 days, the first a commercial diet supplemented with 1% tryptophan (Trp) and second, the same commercial diet without tryptophan supplementation (control group). The effects of two types of handling stressors (air exposure and confinement/netting) on fish fed both diets was evaluated in terms of gene expression of the selected gut immunity markers, such as (1) innate immune response processes: c3 complement (c3), lysozyme (lys), and cyclooxygenase (cox2); (2) humoral immune response processes: interferon type 1 (ifn1), mx protein (mxp), interleukin 1b (il-1b), tumor necrosis factor 1a (tnf1a), and interleukin 10 (il-10); (3) antimicrobial peptides: defensin (def), hepcidin (hep), piscidin (pis), and a marker for mitochondrial respiration: glyceraldehyde 3-phosphate dehydrogenase (gapdh). Samples of the anterior intestine were collected at 1 and 6 h post-stress (hps). Results showed that in fish fed 1% Trp, the air exposure resulted in an upregulation of gene expression at 6 hps for c3, lys, cox2, ifn1, mxp, il-10 and gapdh, and il-1b and pis. The confinement/netting test for fish fed 1% Trp resulted in an upregulation of c3 and mxp and a downregulation of cox2, ifn1, il-1b, tnf1a, il-10, def, hep, and gapdh at both post-stress times (1 and 6 hps). According to the present study, dietary supplementation with 1% Trp may be considered as a proper nutritional strategy for improving tolerance and/or alleviating acute response to handling stressors."

Article

Argyrosomus regius, amino acid, stress, immune response, gene expression, aquaculture, diet supplement BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOLOGÍA ANIMAL (ZOOLOGÍA) NUTRICIÓN NUTRICIÓN

Growth and development of herbaceous plants in aquaponic systems

Crecimiento y desarrollo de plantas herbáceas en sistemas acuapónicos

ELVIA AZUCENA ESPINOSA MOYA Carlos Alfonso Álvarez González Pedro J. Albertos_Alpuche RAFAEL GUZMAN MENDOZA ALICIA DEL ROSARIO MARTINEZ YAÑEZ (2018)

La acuaponía integra la producción acuícola e hidropónica utilizando los desechos de los peces como nutrientes para diversos cultivos vegetales. Las herbáceas como la albahaca (Ocimum basilicum L.), la menta (Mentha piperita L.) y la hierbabuena (Mentha spicata L.), tienen gran demanda por sus propiedades, sin embargo, existe poca información sobre su comportamiento en acuaponía. El objetivo del presente estudio fue evaluar el crecimiento y desarrollo de estas especies cultivadas en acuaponía. De acuerdo a los resultados, las herbáceas evaluadas se adaptan a las condiciones del cultivo y pueden ser utilizadas como parte de los filtros biológicos de sistemas acuapónicos para la producción de tilapia (Oreochromis niloticus L. var. Stirling). La calidad del agua se mantuvo en rangos adecuados tanto para la producción de tilapia como herbáceas. La hierbabuena fue la que tuvo mayor productividad, sugiriendo que esta planta asimila de forma más eficiente los nutrientes producidos en este tipo de sistema

Aquaponics integrates aquaculture and hydroponic production using fish waste as nutrients for various vegetable crops. Herbaceous plants such as basil (Ocimum basilicum L.), peppermint (Mentha piperita L.) and spearmint (Mentha spicata L.) are in great demand due to their properties; however, there is very little information about their behavior in aquaponics. The objective of this study was to evaluate the growth and development of these species under aquaponic conditions. According to the results, the evaluated herbaceous plants suit crop conditionsand they can be used as part of the biological filters in aquaponic systems with tilapia (Oreochromis niloticus L. var. Stirling) production. Water quality could be maintained within appropriate ranges for both fish and plant production. Spearmint was the plant where the highest productivity was observed, suggesting that it assimilates the nutrients produced in this type of system more efficiently

Article

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA Acuaponía Albahaca Hierbabuena Menta Filtros biológicos Aquaponics Basil Peppermint Spearmint Biological filters

In vitro protein digestibility of animal, vegetal and microbial feed ingredients for Macrobrachium tenellum

CYNTHIA EUGENIA MONTOYA MARTINEZ Héctor Gerardo Nolasco Soria FERNANDO VEGA VILLASANTE olimpia victoria carrillo farnés Carlos Alfonso Álvarez González ROBERTO CIVERA CERECEDO (2018)

"Due to the cost of raw materials, the need to formulate balanced feeds with highly digestible ingredients is indispensable for the aquaculture feed industry. For this reason, the protein in vitro digestibility, assessed by the pH-stat method, of ingredients with potential of using them on the balanced feed for Macrobrachium tenellum, were evaluated. The relative protein digestibility was assessed in twelve feed ingredients, including animal (pork meal, feather poultry meal, prime poultry meal, turkey meal, fish meal, shrimp meal), vegetal (coconut paste, chickpea meal, soybean meal, wheat gluten) and microbial (yeast and Spirulina meal); casein (Hammerstein grade) was used as the reference protein. The highest relative protein digestibility was found in: Spirulina meal (52.6%); following by pork meal (45.6%), and feather poultry meal (39.6%). The lowest digestibilities were found in soybean meal (15.9%), chickpea meal (12.1%), and fish meal (11.6%). The protein digestibility value should be considered for selecting potential ingredients for the formulation of balanced feeds for M. tenellum."

Article

Macrobrachium tenellum, prawns, nutrition, protein, enzyme activity, digestibility, aquaculture CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CIENCIAS AGRARIAS PRODUCCIÓN ANIMAL NUTRICIÓN NUTRICIÓN

Attractability and palatability of ingredients in longarm river prawn Macrobrachium tenellum feed

CYNTHIA EUGENIA MONTOYA MARTINEZ Héctor Gerardo Nolasco Soria FERNANDO VEGA VILLASANTE olimpia victoria carrillo farnés Carlos Alfonso Álvarez González ROBERTO CIVERA CERECEDO (2018)

"The present work evaluates the attractant and palatable potential of six ingredients of animal origin in longarm river prawn Macrobrachium tenellum juveniles in a Y type maze system. Ingredients were pelletized for the first bioassay and included in neutral gelatin (in wet base) in the second bioassay. The ingredient to evaluate was placed in one of the Y-maze arms, allowing the free movement of prawn for 15 min. On both bioassays, attractability was evaluated by quantifying the time required for the first prawn to enter the region where the feed was found and the total of prawns which entered that region. In the second bioassay, also evaluated the palatability quantifying the time for the first prawn to have contact with the ingredient, the total of prawns which had contact with it and the time they remained feeding. No significant differences were obtained between treatments in the first bioassay. Significant differences were found in the second bioassay showing that pork meal, fish meal, feather meal and shrimp meal have greater attractability due to the number of prawns attracted, results also show significant differences in palatability, where fishmeal, shrimp meal and pork meal stimulating a higher number of organisms and promoting a longer consumption time."

Article

Macrobrachium tenellum, chemoattraction, Y type maze, prawn, feeding, aquaculture CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CIENCIAS AGRARIAS PRODUCCIÓN ANIMAL NUTRICIÓN NUTRICIÓN

Gene expression of digestive enzymes during the initial ontogeny of Mexican snook Centropomus poeyi

GLORIA GERTRUDYS ASENCIO ALCUDIA Dariel Tovar Ramírez Hever Latisnére Barragán rafael martinez-garcia Wilfrido Miguel Contreras Sánchez Carlos Alfonso Álvarez González (2018)

"Mexican snook (Centropomus poeyi) is one of the most important commercial species in Southeast Mexico, which has been overexploited by fisheries. For this reason, some recent studies related to its culture have been done. However, the basic biological knowledge of the digestive physiology is still unknown. In this study, the gene expression of trypsin, (TRY), bile-salt dependent lipase (BAL), amylase (AMY), and cytosolic non-specific dipeptidase (CNP) was investigated during the larval period from embryo (0 days after hatching, DAH), eleuteroembryo (1 DAH) until 25 DAH using RTq-PCR approach and was normalized with the elongation factor 1- gene (EF1-α). TRY gene expression showed the maximum peak at 17 DAH; meanwhile, BAL gene expression showed variations during larviculture, however, three peaks were observed at 10, 17 and 25 DAH, which appears to correspond to changes in live food supply (rotifers and Artemia nauplii). AMY gene expression was low detected from hatching onwards and showed a slight peak at 10 DAH when larvae were fed with Artemia nauplii. Finally, CNP gene expression had presented three peaks at 2 DAH (yolksac absorption), 19 and 23 DAH when larvae were fed with Artemia nauplii. We conclude that C. poeyi larvae showed early and high digestive enzyme expressions, especially TRY, which indicate that could be possible to start the weaning process at 25 DAH, which could be shorter compared than other Centropomid species."

Article

Centropomus poeyi, snook, larviculture, gene expression, RT-qPCR, digestive enzyme BIOLOGÍA Y QUÍMICA CIENCIAS DE LA VIDA BIOQUÍMICA ENZIMOLOGIA ENZIMOLOGIA