Alfonso N Maeda-Martinez

Centro de Investigaciones Biológicas del Noroeste | CIBNOR · Unidad Nayarit

Backyard aquaculture is gaining importance as a source of food and economic input for rural families in Mexico. The profitability of this system needs to be determined. Bioeconomic tools allow for making profit projections of any production system. A bioeconomic model composed of biological, production, and economic sub-models was developed to eval...

The global production of aquatic resources is increasing at the rate of 3.3 million tons per year, main thanks to aquaculture. However, this industry is considered by financial institutions as high risk due to failures caused by epizootics, natural disasters and poor planning and monitoring. Bioeconomic modelling is a progressive branch of social s...

Se realizó un análisis de la producción de crías de tilapia Oreochromis niloticus en instalaciones acuícolas en México de 2014 a 2021, a partir de la producción pesquera y acuícola registrada a nivel nacional. Para ello se analizaron los registros de producción de crías de tilapia en laboratorios, los volúmenes de cosechas anuales registrados en la...

Artículo original |Original article Palabras clave Índice Comparación LED Luz Fluorescente Microalgas Keywords Index Comparison LED Fluorescent Light Microalgae RESUMEN | Para facilitar la toma de decisiones en cultivos de organismos fotoautótrofos, se proponen distintos índices que permiten evaluar, de modo efectivo la productividad de los sistema...

Para facilitar la toma de decisiones en cultivos de organismos fotoautótrofos, se proponen distintos índices que permiten evaluar, de modo efectivo la productividad de los sistemas al emplear diferentes tipos de luz. El coste lumínico por célula producida, se obtiene mediante el indicador Consumo Lumínico Celular (CLC). El rendimiento de cada fuent...

In the present work, the relative effects of the season (early vs. late summer), site (Gulf vs. Pacific study sites), the population of origin (Gulf vs. Pacific) and associated abiotic variables were determined in two geographically-separated Nodipecten subnodosus populations and their reciprocal transplants, through the scope for growth (SFG) and...

In the present work, the relative effects of season (early vs. late summer), site (Gulf vs. Pacific study sites), population of origin (Gulf vs. Pacific) and associated abiotic variables were determined in two geographically-separated N. subnodosus populations and their reciprocal transplants, by means of scope for growth (SFG) and net growth effic...

The effect of pre‐filleting time (from 8 to 72 hr) of eviscerated chilled tilapia (Oreochromis niloticus) on the freshness quality and shelf life of tilapia fillets during 19‐day storage at 0°C was determined to know if pre‐filleting time affects shell life of tilapia fillets. Nonsensory methods were employed including physical (color and texture),...

The present research work determined the effect of the stable and oscillating seawater temperature at three different levels (21, 24 and 28°C), on the physiological condition of the lion’s paw scallop Nodipecten subnodosus. For this, we evaluated the following physiological indicators: adenosine triphosphate content (ATP), glycogen and total carboh...

Optimum temperature for growth of an invader population of green mussel Perna viridis (31.1 ± 1.9 mm SL; 0.8 ± 0.2 g DTW) from Guayacan Venezuela, was determined by means of scope for growth (SFG) at 22−34 °C with an open-flow system. The objective was to find the suitability of its cultivation in the Gulf of Cariaco Venezuela. Morphometric relatio...

The aim of this study was to evaluate Macrocystis pyrifera and Zea mays meals as nucleation sites in biofloc formation. Bioflocs were studied for a period of 12 weeks, by measuring volume, dry weight, organic matter, and ash weight. These were induced by the addition of bacterial inoculum, molasses and both types of meals to fresh water. After 4 we...

La evaluación productiva de las estirpes de tilapia debe ser una práctica habitual en los sistemas de producción para poder establecer una alta rentabilidad. Esto permite identificar áreas de oportunidad y atención para mejora en el producto en beneficio de los productores. En el presente estudio se realizaron evaluaciones biológicas de estirpes co...

Quality and shelf life of whole eviscerated tilapia Oreochromis niloticus were assessed during 8h transport and 19 days storage on ice. Transport time was similar in that estimated from the harvest site to the distribution and selling centers in the region. Physicochemical (pH, colour, texture), biochemical (total volatile bases, nucleotides and K...

El uso adecuado de zootecnias para el manejo de tilapia brinda beneficios a los acuicultores en términos de productividad. Ante la problemática de manejar un producto que requiere de ciclos productivos de 6 meses para la obtención de tilapias con un peso promedio de 500g, la implementación de una producción escalonada ofrece ventajas competitivas a...

Infectious diseases have been a major limiting factor for large scale production of oyster farming. Several factors have contributed to the emergence and spread of infectious diseases in all cultivation sites around the world. Therefore, the prevention and control of diseases has become a priority for the sustainability of global aquaculture. Crass...

We evaluated the effect of nine isocaloric diets prepared with a mixture of microalgae alone (Tisochrysis lutea + Chaetoceros calcitrans + Ch. gracilis; 1:1:1) and different combinations of the algal mixture and cornstarch or wheat flour, on the Scope for Growth (SFG) of Cortez oyster Crassostrea corteziensis juveniles (7.2 ± 1.1 mm shell length)....

The search for exotic pathogens related to the outbreaks and in surveillance samplings of the Mexican oyster farms, is a recent activity achieved by academic institutions and state committees for Aquatic Animal Health, with remarkable results. In samples of Crassostrea gigas collected through December 2009, January 2010 and November 2010, and of C....

El trabajo describe por primera vez el desarrollo larvario hasta juvenil de Euvola vogdesi y las experiencias en el cultivo larvario de esta especie. Los reproductores en acondicionamiento gonádico alcanzaron la madurez total a los 42 ± 5 días. La inducción al desove se realizó con los métodos de shock térmico (18-20°C/20 min) e inyección intragona...

Abstract We determined the effects of various light spectra (white, green, blue and red) on the growth rate, biochemical composition, and fatty acid content of Tisochrysis lutea maintained in batch cultures. The growth rate peaked with white and blue light, and the lowest rate was observed with green and red light. The chlorophyll a content differe...

Avaliou-se o efeito do transporte em refrigeração por 48 horas e quatro dias de armazenamento sobre a qualidade e vida de prateleira da gônada do bivalve pata de leão, Nodipecten subnodosus. Determinou-se a composição centesimal, a adenosina 5'trifosfato (ATP) e afins, o índice K, bases voláteis totais (TVB-N), trimetilamina (TMA-N), pH, perfil de...

In this study was applied an acid pre-treatment to scallop with the aim of reducing drying times of Pacific Lion's Paw Scallop meats. The samples were immersed in 0.1M citric acid for zero (control), one, and three hours. Pretreatment in acid solution and drying temperature (50, 60 and 70 ºC) were evaluated on the a w and the sorption phenomenon in...

Changes in total lipids and fatty acid profiles (FAPs) of gonad, digestive gland, mantle and muscle of the tropical scallop Nodipecten nodosus were examined during coastal upwelling and upwelling relaxation periods. Total lipids were most abundant in digestive gland, and intermediate in female gonad. Multidimensional scaling analysis of similaritie...

The effect of season and storage at three temperatures (0, 5 and 10 °C) was evaluated on the main metabolites and parameters related to rigor mortis. Adenosine 5′-triphosphate (ATP), lactic acid, octopine, pH and sarcomere length in the adductor muscle of lion's paw scallop Nodipecten subnodosus were determined. Seasonality influenced the initial v...

Predation is known to impact growth and reproduction, and the physiological state of the prey, including its susceptibility to oxidative stress. In this study, we investigated how prolonged exposure to predators modulates tissue specific antioxidant defense and oxidative damage in the short-lived epibenthic scallop Argopecten ventricosus (2years ma...

Registros costeros de temperatura superficial del mar en la Península de Baja California El análisis de series ambientales de temperatura de alta resolución temporal en las zonas costeras permitirá caracterizar mejor las formas y escalas de variación. Las bases de datos disponibles actualmente carecen de suficiente resolución para detectar variacio...

The effect of refrigerated transport during 48h and four days storage on the quality and shelf life of the adductor muscle of whole lion's paw scallops (Nodipecten subnodosus) was evaluated. Proximal composition, ATP and related products, K-value, total volatile bases (TVB-N) and trimethylamine (TMA-N), pH, and microbiological analyses were quantif...

Environmental factors are known to modify the life history of marine ectotherms. In a 16-month laboratory experiment, we investigated the influence of temperature and presence of predators on life-history parameters including shell growth, survival and the energy investment in reproduction and body mass of the short-lived (2–3 years) scallop Argope...

We carried out growth trials on three size groups of the scallop, Euvola ziczac, during two short-term (34-36 days) periods at 8, 21, and 34 m depth in Cariaco Gulf, Venezuela, in order to evaluate the effect of environmental factors on growth. Growth was greater in juveniles (initial size: 20-22 mm shell length) than in maturing juveniles (30-40 m...

We carried out growth trials on three size groups of the scallop, Euvola ziczac, during two short-term (34-36 days) periods at 8, 21, and 34 m depth in Cariaco Gulf, Venezuela, in order to evaluate the effect of environmental factors on growth. Growth was greater in juveniles (initial size: 20-22 mm shell length) than in maturing juveniles (30-40 m...

This chapter gives the reader an overview and summary of the studies carried out to develop protocols for intensive and sustainable production of juvenile scallops N. nodosus and N. subnodosus. These include broodstock maturation, spawning induction and fertilization of gametes, larval culture, postlarval and spat nursery care, and their subsequent...

The present chapter summarizes studies conducted to develop the cultivation of the scallops, N. nodosus and N. subnodosus, including three stages of their culture in the marine environment: nursery stage, intermediate culture and growout. To give a clearer vision, the present chapter was divided in two parts. The first part deals with the advances...

This study shows the short-term effect of three flow rates (0.8, 1.6, and 2.5cms−1) and three ranges of microalgae Isochrysis galbana (clone T-Iso) concentrations (80–120, 150–180 and 200–250cellsμL−1) on the scope for growth, biochemical composition, and immune responses of the digestive gland and adductor muscle in the juvenile penshell Atrina ma...

The impact of artisanal capture practices and post-capture handling on the loss of freshness and quality of the muscle of cazon fish (Mustelus lunulatus) was evaluated. Artisanal practice conditions employed by fishermen of Kino Bay, Sonora state, in the Gulf of Baja California, Mexico were used in the study. The evaluated stages were catch, guttin...

To determine extreme and optimum temperature and salinity for growth in the mangrove cockle Anadara tuberculosa, we measured the scope for growth in adult cockles exposed to 16 treatments composed of combinations of four salinities (20, 30, 40, and 50psu) and four water temperatures (23, 26, 29, and 32°C). Higher clearance rates were recorded in co...

Currently, there is an increasing interest in shipping live adult scallops to markets and broodstock to hatcheries; nevertheless, information about the shipping effect on live scallops physiology is very scarce. In a previous study, a method in emersion was developed to ship scallop seed out of water, but it was not known whether this method is use...

Ray fish were caught, filleted, and stored in ice. Fillets were analysed for 18 days to determine the chemical, biochemical and physical changes and their relation to the muscle eating quality. Trimethylamine (TMA-N), total volatile bases (TVB-N), ATP content and breakdown products, K value, pH, texture, water-holding capacity (WHC) and colour chan...

Large numbers of spat of giant lion's paw scallop Nodipecten subnodosus are required for the development of the scallop aquaculture industry. Despite the large adult populations of this species in Ojo de Liebre Lagoon, Baja California Sur, Mexico, attempts to collect spat with onion bag collectors during the reproductive season (September-November)...

Large numbers of spat of giant lion's paw scallop Nodipecten subnodosus are required for the development of the scallop aquaculture industry. Despite the large adult populations of this species in Ojo de Liebre Lagoon, Baja California Sur, Mexico, attempts to collect spat with onion bag collectors during the reproductive season (September–November)...

The present chapter summarizes studies conducted to develop the cultivation of the scallops, N. nodosus and N. subnodosus, including three stages of their culture in the marine environment: nursery stage, intermediate culture and growout. To give a clearer vision, the present chapter was divided in two parts. The first part deals with the advances...

En la presente obra “Biología y cultivo de los pectínidos del género Nodipecten” se presenta la información científica y tecnológica de dos especies de mano de león, generada por investigadores, técnicos y acuicultores con el fin de sentar las bases del conocimiento necesarias para el desarrollo de una importante industria acuícola. Esta obra está...

Este capítulo tiene el objetivo de brindar al lector una visión generalizada y resumida de los estudios llevados a cabo hasta el presente, para desarrollar protocolos dirigidos a la producción intensiva y sostenida de juveniles de los pectínidos N. nodosus y N. subnodosus en el laboratorio. Esto incluye la maduración de los reproductores, su madura...

We examined the influence of the reproductive cycle and environmental variables on the gonadal fatty acid profile in the tropical scallop Nodipecten nodosus. Individuals from a natural population in north-eastern Venezuela (Caribbean Sea) were sampled monthly during one year. The gonadosomatic index (GSI) and a visual assessment of gonadic status a...

A description of an experimental model is presented wich has the purpose of controlling the dissolved oxygen concentration (DOC) in a water tank where marine species are raised. The control model considers an on-off algorithm that's monitored remotely and can be modified by means of a web application. The model includes all perturbations that affec...

Three water flow rates (3.1, 7.3, and 12.1 cm s–1) were used during a 26–day period to determine their effects on shell dimensions, tissue mass, condition index, biochemical composition of tissues, and mortality of the penshell Atrina maura and mussel Mytella strigata kept in an open–flow flume. These parameters were measured at the beginning and e...

Three water flow rates (3.1, 7.3, and 12.1 cm s-1) were used during a 26-day period to determine their effects on shell dimensions, tissue mass, condition index, biochemical composition of tissues, and mortality of the penshell Atrina maura and mussel Mytella strigata kept in an open-flow flume. These parameters were measured at the beginning and e...

The Pacific lion's paw scallop Nodipecten subnodosus has been one of the most important commercial species of mollusc in the Baja California peninsula in Mexico since 1990. This species is a functional hermaphrodite with tropical and sub-tropical distributions and experiences wide annual temperature oscillations influencing its physiological functi...

Pacific Lion’s Paw Scallop meats were dried at 50, 60, and 70°C after pretreatment in citric acid at pH 3 during zero (control), one, and three hours. Immersion in the acid solution reduced the scallop pH from 6.20 to 5.99 (1h) and 5.88 (3h) and directly affected the drying times. At 50°C drying times were 22, 10 and 8.5h, at 60°C they were 15, 9.5...

This paper describes morphometric relationships, and the timing of gametogenic development and spawning for the geoduck clam Panopea globosa (Dall 1898) from a population in the east central Gulf of California. Clams were collected monthly for a year (October 2004 to October 2005), and were measured and weighed to obtain morphometric relationships....

Salinity tolerance and resistance of the Pacific lion's paw scallop Nodipecten subnodosus, using the median lethal concentration method (LC50) and a gradual change method were measured. We also attempted to demonstrate whether salinity and temperature, pH, dissolved oxygen and turbidity control the distribution and densities of species within a coa...

The initial ingestion age and size and the digestive index of Argopecten ventricosus-circularis Sowerby II, 1842 veliger larvae were investigated using epifluorescence microscopy. Ten microalgae were tested as feed during the first 7 days of life at this stage. Results of ingestion experiments showed there was a significant positive correlation bet...

Although diel vertical migration (DVM) of krill and other zooplanktonic organisms has been studied since mid-XVIII century, evidence to explain inter-specific and spatio-temporal variations in DVM extension remains elusive. We compared the antioxidant response and respiration rates of three krill species of the Gulf of California. In winter, Nyctip...

Osmotic pressure and major ions (Cl−, Na+, Mg2+, Ca2+) of the egg capsule fluid in the slipper limpet Crepidula fornicata were investigated in relation to embryonic development. Calcium permeability of the capsule wall was studied at oviposition, by dipping freshly laid egg capsules in 45Ca as a tracer. This study also determined total calcium cont...

During the years of 1989 and 1990, the yield of the commercial fishery for the catarina scallop, Argopecten circularis (Sowerby, 1835), in Magdalena Bay, was 750 million organisms (5186t of muscles), which were gathered by diving at 12–30m depth. This production is the largest registered to date and accounted for 53% of the total Mexican scallop pr...

Postmortem biochemical, chemical, and physical changes of the adductor muscle of Pacific lions-paw scallop were studied during a 15-day storage period at 0 °C (ice). Content of ATP and breakdown products, K value, pH, trimethylamine, total volatile bases, water-holding capacity, colour, and texture changes were examined. K value increased logarithm...

Nine temperatures (16, 18, 20, 22, 24, 26, 28, 30, and 32 °C) within the natural range of distribution of the Cortez oyster Crassostrea corteziensis were tested in a first experiment to determine the optimal temperature for growth and survival. Based on these results, a second study assessed two temperatures above this range (34 and 36 °C) to deter...

Juvenile Pacific giant lions-paw scallops Nodipecten subnodosus were fed the toxic dinoflagellate Gymnodinium catenatum, a producer of paralytic shellfish poison (PSP), supplied with Isochrysis galbana (a nontoxic microalgae). Short-term (<24h) experiments were performed to determine clearance and ingestion rates of G. catenatum. Kinetics of PSP wa...

We conducted a search for antibacterial peptide like activity in hemolymph of Argopecten ventricosus. Pre-purification of peptides was done by reverse phase HPLC. Hemolymph acidic supernatant was loaded into a column packed with C18 matrix. Stepwise elutions were performed with 5, 50, 80, and 100 % acetonitrile (ACN) in 0.05 % trifluoroacetic acid...

We conducted a search for antibacterial peptide like activity in hemolymph of Argopecten ventricosus. Pre-purification of peptides was done by reverse phase HPLC. Hemolymph acidic supernatant was loaded into a column packed with C18 matrix. Stepwise elutions were performed with 5, 50, 80, and 100 % acetonitrile (ACN) in 0.05 % trifluoroacetic acid...