Video Experimental Relacionado
Updated: Dec 30, 2025
10:34
Activity of Posterior Lateral Line Afferent Neurons during Swimming in Zebrafish
Published on: February 10, 2021
4.1K
Nadar contra la corriente: un mecanismo de agregación del zooplancton
Amatzia Genin1, Jules S Jaffe, Ruth Reef
1Interuniversity Institute for Marine Sciences and the Hebrew University, Eilat, Israel. amatzia@vms.huji.ac.il
Science (New York, N.Y.)
|May 10, 2005
Resumen
El minúsculo zooplancton nada activamente contra las corrientes oceánicas para mantener la profundidad, acumulándose en los frentes. Este comportamiento explica por qué los frentes oceánicos son zonas de alimentación cruciales para la vida marina.
Área de la Ciencia:
- Biología Marina Biología Marina.
- Oceanografía La oceanografía es la oceanografía.
- Ecología del zooplancton Ecología del zooplancton
Sus antecedentes:
- El zooplancton habita en ambientes acuáticos dinámicos, pero sus respuestas al flujo ambiental son poco conocidas.
- El seguimiento del zooplancton pequeño y transparente en el océano presenta importantes desafíos metodológicos.
Objetivo del estudio:
- Para investigar las respuestas de comportamiento del zooplancton al flujo de agua ambiental.
- Para aclarar los mecanismos detrás de la acumulación de zooplancton en las zonas frontales oceánicas.
Principales métodos:
- Utilizó un nuevo sistema de imágenes acústicas tridimensionales para el seguimiento.
- Monitoreado más de 375.000 zooplanters individuales en dos sitios costeros del Mar Rojo.
- Movimiento del zooplancton diferenciado del movimiento del agua circundante.
Principales resultados:
- El zooplancton demostró una regulación efectiva de la profundidad nadando contra las corrientes.
- Los animales observados contrarrestan los flujos ascendentes y descendentes hasta decenas de longitudes corporales por segundo.
- Se ha documentado una importante agregación de zooplancton dentro de las zonas frontales.
Conclusiones:
- El zooplancton posee sofisticadas capacidades de natación para contrarrestar el flujo ambiental.
- El mantenimiento activo de la profundidad por el zooplancton contribuye a su concentración en los frentes oceánicos.
- Estas agregaciones de zooplancton en los frentes sirven como áreas de alimentación vitales para los depredadores y los objetivos de pesca.
Videos de Conceptos Relacionados
01:27Diversity of Protists IV
671
Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
671
01:06Fixed Action Patterns
17.3K
A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
17.3K
01:39Mechanism of Filopodia Formation
3.0K
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
3.0K
01:31Mechanism of Lamellipodia Formation
3.4K
Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
3.4K
02:32Osmoregulation in Fishes
52.6K
When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
52.6K