The scale‐up of spotted rose snapper, Lutjanus guttatus , larval rearing is described. Fertilized eggs (480,000) were obtained from a 1‐d harvest natural spawning captive broodstock acclimatized for 1 yr and 6 mo in two fiberglass tanks (18 m 3 ). Fourteen hours after spawning, 89.6% the collected floating, which 96.2% transparent with live embryos. Incubation at 25–26 C lasted 21 h, 90.2 ± 2.1% hatching percentage normal larvae. viable larvae 48 h was 79.7 1.9%. Initial stocking density...

A common problem in marine fish hatcheries is the lack of functional embryonic parameters reliably predicting favorable larval outcomes. Embryos characterized as high-quality by typical assessment methods frequently result weak larvae with high mortality during endo-exotrophic transition. Thus, because there no universal consensus on what are most associated successful survivability, this study aims to determine reliable, practical, and real-time predictor vitality at earliest developmental...

The effect on growth and survival of the initial stocking density (30, 20 10 eggs L -1 ) in larval rearing spotted rose snapper (Lutjanus guttatus) was evaluated.The were incubated nine black fibreglass tanks with three replicates for treatment.Larvae cultured same using green water technique.Larvae harvested at 45 days post-hatch (DDE).Total length (LT), weight (PH) rate (S) determined.Initial did not affect rates.Therefore, it is advisable to carry out culture 30 maintain good levels.

Efecto de diferentes niveles proteína y lípidos totales en la dieta

The clownfish Amphiprion ocellaris is widely distributed in the coral reef ecosystems of tropical and subtropical regions West Indo Pacific, an area that hosts economically valuable species, and, thus, a suitable candidate for warm water aquaculture. This study determined preferred temperature, critical threshold limits, represented by thermal maximum minimum, window width, aerobic metabolic scope A. acclimated to 20, 23, 26, 29, 32, 35 °C. A positive response (P < 0.05) occurred when...

The first check-list of soft-bottom fishes from the continental shelf off Jalisco and Colima, Mexico, is presented. list includes 140 species, belonging to 98 genera 54 families, collected with shrimp trawl nets aboard research vessel BIP-V during May June 1995 along 111 km, at 20, 40, 60 80 m depth. specimens were cataloged deposited in ichthyological collection Centro de Ecología Costera Universidad Guadalajara San Patricia-Melaque, Jalisco, Mexico.

The spotted rose snapper, Lutjanus guttatus, is culture in several Latin American countries.The present study reports the generation closure with juveniles obtained from wild adults which matured and spawned at a Mazatlan laboratory (Mexico).F1 fish were sexually 2 years of age, spawning was induced successive years.F2 reared until their sexual maturity same laboratory.Result indicate that reliable supply spawners can be achieved, avoiding dependence allow development selection genetic...

The spotted rose snapper (Lutjanus guttatus) is a marine fish species highly appreciated in local markets of some countries Latin America. For this reason at first wild juveniles were captured and stocked floating cages for aquaculture. Since the last decade studies about reproduction captivity massive juvenile production started order to supply continue culture. current study presents up date results regarding spawning, egg management incubation larval rearing protocols

To evaluate the effect of salinity on hatching rate, time, survival percentage, osmoregulation pattern and incidence abnormalities in newly hatched larvae, embryos Sphoeroides annulatus (Jenyns 1842) were exposed to 5, 12, 19, 26, 33, 35 40 psu. The percentage (HP), (PS), normal larvae (PN), deformed (PD) time (HT) significantly affected by (P < 0.05). exposure 5 psu caused that HP, PS, PN had lower values (2.6 ± 0.32, 7.78 0.88 70.37 7.75% respectively), PD HT highest 26.67 7.54% 55.53 0.59...

The karyotypes of the purple snails Plicopurpura pansa (Gould, 1853) and P. columellaris (Lamarck, 1816) were established from 17 13 adults, respectively; eight capsules with embryos pansa. In counted 59 mitotic fields in adults 127 embryos; 118 P columellaris. Chromosome numbers 30 to 42 observed both species. Such a variation was notorious each sample there no evidence any relationship tissue (gill, muscle stomach). Both species has typical modal number 2n=36 chromosomes. Five good quality...

En el presente trabajo se evaluó efecto de diferentes fotoperiodos en la eclosión, crecimiento y supervivencia larvas Sphoeroides annulatus. cada uno 12 tanques fibra vidrio colocaron 5 g huevos desgomados tasa longitud total peso las bajo cuatro con tres replicados uno: 24 horas luz (hl), 18 hl, hl 0 durante 45 días después eclosión. La eclosión fue significativamente menor a no sobrevivieron los5 El crecimiento, tanto como peso, mayor hl. presentódiferencias significativas entre los...

The structure of the soft-bottom demersal fish assemblages continental shelf off Jalisco and Colima, Mexico, was studied in an area 410 km2. classification 32 most abundant species resulting from cluster analysis shows eight groups (three inner shell; four intermediate one slope shelf). ordination through detrended correspondence (DCA) defined seven units; affinity composition these units were similar to that other technique. multiple contrasts variance, using depth/temperature/salinity...

The bullseye puffer fish Sphoeroides annulatus is an important marine species due to its culture potential and high market value in Mexico.Research on aspects of reproduction larvae this commenced México 1997 at Centro de Investigación en Alimentación y Desarrollo (CIAD-Mazatlan Unit), Mazatlán, Sinaloa.This work describes the following biotechnological developments for obtaining mass production juveniles: hormonal induction methods, spawning, egg fertilization incubation, live feed larviculture.

The effects of different water temperatures (22, 25, 28 and 31ºC) salinities between 0 60 psu (with intervals 5 psu) on egg incubation the bullseye puffer (Sphoeroides annulatus) were evaluated in this study.The embryos could not develop at 22ºC highest hatching rate for normal larvae was observed 28ºC.At 0, 50, 55 unable to develop.Highest rates obtained 30 35 psu.It concluded that temperature salinity affects period, embryo development stage larval survival puffer.

Los embriones y las larvas de los peces marinos utilizan aminoácidos (AA) como fuente energía para el metabolismo aeróbico mantener la osmolalidad fluidos corporales durante primeros estadios desarrollo. El perfil AA huevos puede utilizarse un indicador aproximado del requerimiento esenciales (AAE). Conocer evolución composición bioquímica proporciona una valiosa comprender mejor necesidades nutricionales comienzo alimentación exógena; etapa donde se han reportado altas mortalidades por...

The Pacific white snook, Centropomus viridis, is considered a species with high farming potential in Mexico due to its economic value and overall demand the national market. Growth farmed fish largely determined by dietary regimen, which includes feeding frequency, rate, time, cycle. aim of present study was determine frequency appropriate time for C. viridis juveniles order optimize growth survival. Juveniles weighing 0.36 ± 0.01 g were used evaluate 1 up 5 ad-libitum frequencies per day, 3...

Genetic (DNA) inactivation of fish sperm with ultraviolet irradiation is generally accompanied by a paradoxical effect on survival rates (Hertwig effect). In the present study, samples from ten male bullseye puffer (Sphoeroides annulatus) were diluted 1:50 using Cortland's extender solution and used to test nine doses (0.2–1.0 J cm–2) motility time in seconds, index, embryo rate after fertilizing eggs five females. Motility irradiated 0.2–0.9 cm–2 not statistically different controls, but...

The results of the effect five different incubation temperatures on development clownfish (Amphiprion ocellaris) larvae are presented. This ornamental species is widely marketed worldwide and reared in captivity at CIAD to meet demand domestic market. experimental work was carried out over 30 days post-hatching observe temperature's larvae's vertebral column caudal complex. eggs were incubated 26, 28, 30, 32, 34°C. percentage hatching, survival, growth, presence skeletal malformations...

&lt;p&gt;&lt;strong&gt;Background:&lt;/strong&gt; Interest in ornamental marine fish, especially species associated with coral reefs, is rapidly growing. Most of the fish traded come from wild, and collection methods harm reefs cause massive mortalities non-target species. To make activity sustainable, it necessary to develop aquaculture biotechnologies reduce wild organisms lessen pressure on their natural environment. &lt;strong&gt;Objective:&lt;/strong&gt; protocols for reproduction...

RESUMEN.El pargo colorado (Lutjanus colorado) es una especie con un alto valor comercial en el mercado mexicano, potencial para su cultivo.Hasta la fecha no existen estudios sobre reproducción, cultivo larvario y engorda cautiverio.El presente trabajo primer reporte descripción a detalle del desarrollo embrionario de bajo condiciones cultivo.Los huevos fertilizados viables son pelágicos, esféricos, transparentes sola gota aceite.Midieron 0,77±0,09 mm diámetro aceite 0,14±0,01 mm.La primera...

Three prophylactic treatments using three dosages each were used as surface disinfectants in bullseye puffer Sphoeroides annulatus eggs to study their effect on bacterial load reduction and hatching rate.Eggs treated with proteolytic enzyme remove stickiness.Tested were: acriflavine (A) at a concentration of 2.5, 5 10 ppm for 1 min; formalin (F) 10, 50 100 30 min glutaraldehyde (G) 50, 200 min, well control group no treatment (C), replicates per treatment.After disinfection, an egg sample...

Introduction: Clown anemonefish (Amphiprion ocellaris) is the most popular fish species in marine aquarium trade, however, there a lack of information on their digestive physiology during larvae ontogeny, valuable that helps design specific diets, as well management protocols for species. Objective: Characterize early development enzymes A. ocellaris ontogeny. Methods: From hatching until 38th day after (DAH), activity acid and alkaline proteases, trypsin, chymotrypsin, leucine...

Se llevó a cabo un experimento para evaluar el efecto de varios niveles proteína y lípidos dietéticos en rendimiento juveniles robalo blanco (Centropomus viridis). realizó diseño factorial 4 × 2 con (40%, 46%, 52% 58%) (10% 13%), 3 replicados por tratamiento. Los peces peso inicial 14.80 ± 0.80 g se alimentaron saciedad aparente veces al día durante 6 semanas. El crecimiento los no presentó diferencias significativas entre tratamientos. La eficiencia alimenticia solo fue afectada nivel la...

Oxygen consumption of different larval stages the spotted rose snapper Lutjanus guttatus were evaluated to help design food strategies for its culture.Oxygen was determined using closed respirometers at a constant temperature 30°C in thermoregulated bath.Six replicates and 2 control each treatment used.Larval from 35 days after hatching (DDE).Dissolved oxygen measured fiber-optic microsensor connected an oximeter.Respiration expressed microliters per milligram dry biomass hour (µLO mg -1 Bs...

Recent findings show that eliminating the gelatinous egg capsule surrounding fertilized eggs of puffer fish Sphoeroides annulatus improves embryonic development and hatching rate.In this work, following 3 different desticking procedures were used to evaluate larval growth survival: 5 ml L -1 proteolytic protease enzyme (EPP), 1% pineapple juice (JP) with no sticky coating on surface as a control (C).All treatments carried out in triplicate experiment lasted for 33 days.The fertilization...