Especies de Oithona (Crustacea: Copepoda) en el Pacífico Colombiano en el Segundo Periodo Lluvioso de 2001

Peralta, Raúl Hernando López; López, Luz Helena Mojica

doi:10.18359/rfcb.1298

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…Todo lo antes expuesto, coincide con los resultados obtenidos en la presente investigación y corroborado con el ACC, ya que A. tonsa se registró durante los dos períodos estudiados y correlacionada en la época de relajación con la salinidad. El Cyclopoida O. nana, se distribuyó en todo el sistema lagunar y durante todos los meses del estudio; es un copépodo común en aguas tropicales, subtropicales y templadas, eurihalino, epipelágico, frecuente en los sistemas lagunares y estuarinos de Venezuela, Colombia y México (Zoppi 1974, Hernández 2000, Álvarez-Silva et al 2006, Álvarez-Silva & Torres-Alvarado 2013, López-Peralta & Mojica-López 2015. Sin embargo, resultados contrarios fueron reportados por Álvarez-Silva et al (2006) y Álvarez-Silva y Torres-Alvarado (2013) para sistemas lagunares de México, quienes indicaron a O. nana como habitantes temporales ya que solo estuvieron presentes algunos meses.…”

Section: Discussionunclassified

Composición y abundancia del zooplancton en la laguna El Morro, Isla de Margarita, Venezuela

et al. 2017

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Se analizó la composición y abundancia del zooplancton de la laguna El Morro en la isla de Margarita, Venezuela, durante el periodo de surgencia (marzo-mayo 2011) y de relajación (junio-agosto 2011). Las muestras fueron recolectadas en 6 estaciones de las diferentes zonas de la laguna. Se realizaron calados con una red de plancton de 333 µm durante 10 minutos. Se midió in situ la temperatura, salinidad y oxígeno disuelto, además de nutrientes. Se registraron valores medios de temperatura de 29.7 ºC, salinidad de 36 ups, oxígeno disuelto de 5.9 mg.L-1. La concentración de nutrientes fue baja (medias de 0.12; 0.04; 0.03 mg.L-1 para nitrato, nitrito y fosfato, respectivamente). Se detectaron diferencias significativas temporales con mayores registros en la temporada de relajación, mientras que espacialmente no mostró diferencias, a pesar que en las estaciones internas (Est. 4,5,6) se obtuvo mayor abundancia. Se identificaron quince grupos zooplanctónicos, determinándose nueve especies del grupo Copepoda, dos de Cladocera, una de Decapoda, Tunicada y Rotifera y diferentes formas larvarias de distintos taxa. Las larvas de crustáceos presentaron la abundancia media y relativa más alta (47738 ind.m-3 y 46.83%, respectivamente), seguido del copépodo Oithona nana (31740 ind.m-3 y 25.94%, respectivamente) y Paracalanus quasimodo (12958 ind.m-3 y 8.47%, respectivamente). Esta laguna involucra la estacionalidad surgencia-relajación como un efecto importante en la distribución y abundancia del zooplancton.

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Section: Discussionunclassified

Composición y abundancia del zooplancton en la laguna El Morro, Isla de Margarita, Venezuela

et al. 2017

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Effect of temperature and salinity on in-vitro population growth of copepode Oithona (Copepoda: Cyclopoidae). Temperature-salinity Oithona culture

Lambraño,

Forero

2023

Preprint

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The marine copepods culture has been considered a great resource for feeding in marine aquaculture. Oithona is the most abundant genus in the oceans and that is why they are the largest contributors of live prey in fish larvae. The present study aimed to identify the influence of temperature and salinity on the population growth of Oithona sp. under laboratory conditions. Copepods were cultivated (n: 15 ind/200 ml in three experimental temperatures: 21, 26, 31°C and in three salinities: 20, 30, and 40‰), which were monitored and adjusted daily. Copepods were fed based on a microalgae culture Isochrysis sp. at a continuous density of 600.000 cel/ml. for 15 days. At the end of the experiment, Oithona sp presented significant statistical differences (p < 0.05), in population growth, with a higher population density at 40‰ (8.040 ± 6.265.2 ind/ 200ml), at a temperature of 31°C. Also, it was shown that the variable salinity alone did not influence the population growth of the copepod, while, if it was related to the water temperature, it presents statistically significant differences (p < 0.05), in all possible combinations. We concluded that Oithona sp. can be well adapted to higher temperature and salinity conditions in which the optimal salinity and temperature variables rate is 31°C and 40‰ to reach a higher development. These conditions improve the rate of reproduction, population growth, and its development in culture.

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Influence of Microalgae Diets on the Biological and Growth Parameters of Oithona nana (Copepoda: Cyclopoida)

Huanacuni

Pepe-Victoriano

Lora‐Vilchis

et al. 2021

Animals

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Several species of the planktonic free-living genus Oithona have been successfully used in the larviculture of marine fish and shrimp. However, few studies have been published that allow us to estimate the potential of Oithona nana culture under controlled conditions. This work evaluated the effect of the microalgae Isochrysis galbana and Chaetoceros calcitrans as single (200,000 cells/mL) and mixed diets (100,000 + 100,000 cells/mL) on population and individual growth, ingestion rate, number of spawnings, fertility, development time by stage, and sex ratio of O. nana. We cultured this copepod at 28 ± 0.5 °C, 35 PSU salinity, 125 lux, and 12:12 photoperiod. Results showed that diet had no effect on the final population level (6273–7966 ind/L) or on individual growth, nor on sex ratio, with less males than females. With C. calcitrans, O. nana had a higher filtration rate (57 ng C/ind/day). On the other hand, a mixed diet induced a higher number of spawns (0.4 events/day) and nauplii per spawn (23 ind). Similarly, a single or mixed diet, containing I. galbana, accelerated the development rate by 6.33–7.00 days. We concluded that O. nana can be cultured with both microalgae, indicating its potential use in an intensive system for production. However, more research is required to improve the productivity of O. nana rearing.

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Especies de Oithona (Crustacea: Copepoda) en el Pacífico Colombiano en el Segundo Periodo Lluvioso de 2001

Cited by 3 publications

References 18 publications

Composición y abundancia del zooplancton en la laguna El Morro, Isla de Margarita, Venezuela

Composición y abundancia del zooplancton en la laguna El Morro, Isla de Margarita, Venezuela

Effect of temperature and salinity on in-vitro population growth of copepode Oithona (Copepoda: Cyclopoidae). Temperature-salinity Oithona culture

Influence of Microalgae Diets on the Biological and Growth Parameters of Oithona nana (Copepoda: Cyclopoida)

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