Relación del crecimiento, condición y supervivencia del ostión del Pacífico Crassostrea gigas y las variables ambientales, cultivado en suspensión en el sistema lagunar Navachiste-Macapule, Sinaloa, México

Abstract

ARTÍCULORelación del crecimiento, condición y supervivencia del ostión del Pacífico Crassostrea gigas y las variables ambientales, cultivado en suspensión en el sistema lagunar Navachiste-Macapule, Sinaloa, México Abstract.-Evaluation of potential culture sites represents a 'good practice' alternative to support the development of oyster industry at the northeast of Mexico. The relationship of growth, condition and survival of Crassostrea gigas with the environmental parameters was studied at the Navachiste-Macapule lagoon system (Sinaloa, Mexico) from November 2011 to November 2012. The culture was carried out using 2,520 small oysters (3.5 ± 0.5 mm shell height) in a suspended longline system. The environmental parameters and oyster biometrics were sampled each 15 days. The mean values were: temperature= 25.01 ± 5.29°C, dissolved oxygen= 6.10 ± 1.93 mg L , respectively. After 13 culture months, the shell height reached 95.05 ± 9.21 mm, length 85.64 ± 20.01 mm, width 28.76 ± 10.91 mm, and the total weight 83.58 ± 17.18 g. The daily growth rate for the shell height and total weight were 0.25 mm day -1 and 0.23 g day -1, respectively. Significant differences were found for the total weight and the shell metric values throughout the culture. The final survival and mean condition index were 94.72% and 34.65 ± 4.46, respectively. Water temperature exerted a positive stronger effect on shell height and total weight. Results show that C. gigas reached the commercial size (80 mm SH) after 8 months of culture under the environmental conditions of the Navachiste-Macapule lagoon system, Sinaloa, Mexico. Obtained data contribute with basic information on further studies and commercial production cycles of this species in the region.Key words: Culture, suspended plastic trays, growth rate, Crassostrea gigas, mortality, MexicoResumen.-La evaluación de nuevos lugares con potencial de cultivo en la industria ostrícola representa una 'buena práctica' que contribuye con el desarrollo de esta actividad en el noroeste de México. Se realizó un cultivo en suspensión (long-line) con el ostión Crassostrea gigas para estudiar la relación de su crecimiento, condición y supervivencia con las variables ambientales en el sistema lagunar Navachiste-Macapule (Sinaloa, México), de noviembre 2011 a noviembre 2012. Se utilizaron 2.520 semillas (3,5 ± 0,5 mm de altura de valvas). Las variables físicas y químicas del agua, y biométricas del ostión fueron registradas cada 15 días obteniendo los siguientes valores promedio: temperatura= 25,01 ± 5,29°C; oxígeno disuelto= 6,10 ± 1,93 mg L -1 ; salinidad= 32,88 ± 2.15; pH= 7,82 ± 0,39 y profundidad= 1,66 ± 0,55 m. Las concentraciones de sólidos suspendidos totales, materia orgánica particulada y clorofila a variaron de 41,94 a 125,22 mg L -1

SEASONAL LEVELS OF HEAVY METALS IN SOFT TISSUE AND MUSCLE OF THE PEN SHELL Atrina maura (SOWERBY, 1835) (BIVALVIA: PINNIDAE) FROM A FARM IN THE SOUTHEASTERN COAST OF THE GULF OF CALIFORNIA, MEXICO

“…Osuna-Martínez et al (2010, 2011 performed metal analysis by sampling cultured oysters seasonally from four coastal lagoons in this region (El Colorado, Santa María La Reforma, Altata and Ceuta), and Bergés-Tiznado et al (2013a, b) reported the levels of arsenic and arsenic species in cultured oyster (C. gigas and C. corteziensis) from coastal lagoons in the same area, but only one work by Páez-Osuna and Osuna-Martínez (2015), who collected wild C. corteziensis and C. palmula specimens, has studied the SINM lagoon system. Among the most important bivalve species cultivated in the north coast of Sinaloa are the oysters C. gigas (Rodríguez-Quiroz et al 2016) and C. corteziensis (Leal-Sepúlveda 2011), the clam Megapitaria squalida (Álvarez-Dagnino 2013), and the pen shell Atrina maura (Góngora-Gómez et al 2011.…”

Suspended culture evaluation of Pacific oysterCrassostrea gigasin a tropical estuary

“…Forecasts for cultivation in equatorial waters of the American Pacific are that C. gigas reaches commercial size (80 mm) at 10–11 months (Lodeiros et al, ), which is a growth rate above many other reports in the subtropical Mexican Pacific (Chávez‐Villalba, ), but smaller than other cultivations performed in lagoons, where oysters of market size can be obtained in 8 months (Rodríguez‐Quiroz et al, ). However, the performance in the production of oysters in the estuary of Chone River is much higher, since it implies the shortening of the cultivation period to reach commercial size by half of the expected in the marine environment.…”

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“…Revista Bio Ciencias 6, e681. Existen reportes previos en el sureste del Golfo de California (Góngora-Gómez et al, 2012;Rodríguez-Quiroz et al, 2016) indicando que el ostión Japonés alcanza su talla commercial entre 7 y 8 meses de cultivo, lo cual, coincidió con los resultados (Encomio et al, 2005), los cuales, be attributed to the continuous increase in both SH and BW (Encomio et al, 2005), which was related to the food availability. At the same time, the CI was correlated with food sources and nutrient content of oysters suggesting nutrient utilization for somatic and shell growth.…”

“…Total SL and BW of 60 specimens from each culture site were measured in situ with a vernier caliper (0.2 mm) and a portable balance (0.00 g), respectively. The growth rate of oyster was reported as body weight gain month -1 (Rodríguez-Quiroz et al, 2016). Survival was calculated by counting dead animals at each sampling and expressed as a percentage of the original number of oysters (Góngora-Gómez et al, 2012).…”

“…La altura de la concha (SL) y peso corporal (BW) de 60 ostiones fueron obtenidos in situ cada mes, con una regla vernier (0.2 mm) y una balanza portátil (0.00 g), respectivamente. La tasa de crecimiento mensual se reportó como la ganancia en peso corporal (Rodríguez-Quiroz et al, 2016). La supervivencia fue calculada contando los animales muertos en cada muestreo y expresada como el porcentaje del número inicial de ostiones (Góngora-Gómez et al, 2012).…”