Respuestas conductuales de los misidáceos pertenecientes al género Neomysis, frente a luz ambiente de distintas longitudes de onda del espectro lumínico en condiciones de laboratorio.
Cargando...
Fecha
2025
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad de Concepción
Resumen
Los patrones migratorios que realiza el zooplancton constituyen un proceso clave en la ecología marina, siendo esencial para la supervivencia y alimentación de las diversas especies que los realizan, dicho proceso es ampliamente estudiado, no tan solo por la llamativa capacidad de estos organismos de desplazarse largas distancias de forma vertical u horizontal por las corrientes marinas, sino también, para dilucidar cual es el factor que les da el estímulo para iniciar dichos desplazamientos. Aunque estudios previos postulan como principal factor influyente a la percepción que tienen estos individuos de la luz que penetra en las profundidades, aun no se puede aseverar con certeza si este es el factor delimitante.
Los misidáceos son crustáceos pertenecientes al zooplancton capaces de colonizar diversos entornos acuáticos, incluyendo hábitats marinos, continentales y estuarinos. La mayoría de misidáceos costeros realizan un patrón migratorio característico, las llamadas migraciones verticales y horizontales, ascendiendo y dispersándose por la columna de agua durante la noche y descendiendo a mayor profundidad durante el día. Dado que la luz es un factor clave para que se lleve a cabo este comportamiento, estos crustáceos han desarrollado una notable capacidad de adaptación visual, presentando sensibilidad a ciertos espectros lumínicos, particularmente en la región azul y verde del espectro visible. Para analizar su respuesta a distintos estímulos lumínicos, se estudiaron ejemplares del género Neomysis, los cuales son abundantes en las costas de la región del Biobío, evaluando el efecto de diferentes espectros lumínicos (rojo, verde, azul y blanco) sobre el comportamiento migratorio de Neomysis sp en condiciones de laboratorio.
Los individuos fueron recolectados en la Bahía de San Vicente, Chile, y sometidos a experimentos de exposición a diferentes colores de una banda de luz led que reemplazó los espectros lumínicos de la luz solar, en los que se registró su actividad, velocidad de nado y preferencia por ellos mediante análisis de video, aplicando un Análisis de Varianza (ANOVA) no paramétrico para evaluar las diferencias en el comportamiento. Los resultados indicaron que no hubo diferencias significativas en la respuesta de los misidáceos a los distintos espectros lumínicos en los tiempos de exposición evaluados (3, 12 y 20 minutos). La alta variabilidad individual y limitaciones experimentales, como la falta de un gradiente lumínico adecuado y el reducido espacio disponible dentro de las probetas, podrían haber influido en los resultados.
A pesar de que la luz se considera un factor altamente influyente en la migración vertical de diversas especies, este estudio no logró establecer una relación clara entre los espectros lumínicos y cambios en el comportamiento de Neomysis sp. Se recomienda realizar investigaciones futuras bajo condiciones más cercanas a las de su hábitat natural para comprender mejor la influencia de la iluminación en su ecología.
The migratory patterns of zooplankton constitute a key process in marine ecology, being essential for the survival and feeding of the diverse species that carry them out. This process is widely studied, not only because of these organisms' remarkable ability to travel long distances on ocean currents, but also to elucidate the factors that stimulate them to initiate these movements. Although previous studies postulate the perception of light penetrating the depths as the main influencing factor, it is not yet possible to definitively assert whether this is the determining factor. Mysids are crustaceans belonging to the zooplankton capable of colonizing diverse aquatic environments, including marine, continental, and estuarine habitats. Most coastal mysids perform a characteristic migratory pattern, known as vertical and horizontal migrations, ascending and dispersing through the water column at night and descending to greater depths during the day. Since light is a key factor in this behavior, these crustaceans have developed a remarkable capacity for visual adaptation, showing sensitivity to certain light spectra, particularly in the blue and green regions of the visible spectrum. To analyze their response to different light stimuli, specimens of the genus Neomysis, which are abundant along the coasts of the Biobío region, were studied. The effect of different light spectral (red, green, blue, and white) on the migratory behavior of Neomysis sp. under laboratory conditions was evaluated. Individuals were collected in San Vicente Bay, Chile, and subjected to exposure experiments with different colors of a LED light band that replaced the light spectra of sunlight. Their activity, swimming speed, and preference for these colors were recorded using video analysis, and a nonparametric Analysis of Variance (ANOVA) was applied to evaluate behavioral differences. The results indicated no significant differences in the mysids' response to the different light spectra across the exposure times evaluated (3, 12, and 20 minutes). High individual variability and experimental limitations, such as the lack of an adequate light gradient and the limited space available within the test tubes, could have influenced the results. Although light is considered a highly influential factor in the vertical migration of various species, this study failed to establish a clear trade-off between light spectra and changes in the behavior of Neomysis sp. Future research under conditions closer to those of their natural habitat is recommended to better understand the influence of light on their ecology.
The migratory patterns of zooplankton constitute a key process in marine ecology, being essential for the survival and feeding of the diverse species that carry them out. This process is widely studied, not only because of these organisms' remarkable ability to travel long distances on ocean currents, but also to elucidate the factors that stimulate them to initiate these movements. Although previous studies postulate the perception of light penetrating the depths as the main influencing factor, it is not yet possible to definitively assert whether this is the determining factor. Mysids are crustaceans belonging to the zooplankton capable of colonizing diverse aquatic environments, including marine, continental, and estuarine habitats. Most coastal mysids perform a characteristic migratory pattern, known as vertical and horizontal migrations, ascending and dispersing through the water column at night and descending to greater depths during the day. Since light is a key factor in this behavior, these crustaceans have developed a remarkable capacity for visual adaptation, showing sensitivity to certain light spectra, particularly in the blue and green regions of the visible spectrum. To analyze their response to different light stimuli, specimens of the genus Neomysis, which are abundant along the coasts of the Biobío region, were studied. The effect of different light spectral (red, green, blue, and white) on the migratory behavior of Neomysis sp. under laboratory conditions was evaluated. Individuals were collected in San Vicente Bay, Chile, and subjected to exposure experiments with different colors of a LED light band that replaced the light spectra of sunlight. Their activity, swimming speed, and preference for these colors were recorded using video analysis, and a nonparametric Analysis of Variance (ANOVA) was applied to evaluate behavioral differences. The results indicated no significant differences in the mysids' response to the different light spectra across the exposure times evaluated (3, 12, and 20 minutes). High individual variability and experimental limitations, such as the lack of an adequate light gradient and the limited space available within the test tubes, could have influenced the results. Although light is considered a highly influential factor in the vertical migration of various species, this study failed to establish a clear trade-off between light spectra and changes in the behavior of Neomysis sp. Future research under conditions closer to those of their natural habitat is recommended to better understand the influence of light on their ecology.
Descripción
Tesis presentada para optar al Tesis presentada para optar al título de Bióloga.
Palabras clave
Migraciones, Zooplancton marino, Fotobiología