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Claudebug

30 Mar 2025 - 12:08 am

Narwhals may be using their tusks to play, new study finds
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Scientists say they have the first recorded video evidence of narwhals using tusks not only to strike and manipulate fish during feeding but also engage in what appears to be playful behavior, according to the latest research.

The narwhal, often referred to as the “unicorn of the sea” in a nod to its trademark tusk, has long remained an enigma. Scientists have observed few interactions of narwhals in their natural habitat, creating speculation about the purpose of the species’ distinctive spiraling tusk.
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Found predominantly in males, the tusk grows up to 10 feet (3 meters) long — and previous research has suggested it serves as a competitive display to secure mates. But now, with the help of drones, research conducted in the Canadian High Arctic has uncovered that a narwhal may use its tusk for more than just courtship.

In total, the researchers newly identified and described 17 distinct behaviors of narwhals involving prey. The findings revealed a wide range of interactions and dynamics between narwhals and fish as well as the extraordinary agility, precision and speed of their tusks to track moving targets, according to the study published February 27 in the journal Frontiers in Marine Science.

“Seeing that these animals are not actually hunting the fish but exploring, manipulating and interacting with it was really a game changer,” said lead author Dr. Gregory O’Corry-Crowe, a research professor in the Harbor Branch Oceanographic Institute at Florida Atlantic University.

Since so little is understood about this whale species, researchers like O’Corry-Crowe and his colleagues are working diligently to conduct studies to document narwhals’ unknown behaviors to better understand how these animals adapt in a rapidly shifting habitat as oceans warm and sea ice melts.
Narwhal exploratory behavior
The study team captured the groundbreaking footage using drones in Creswell Bay, on the eastern side of Somerset Island in Canada’s Nunavut territory, during the summer of 2022.

As the researchers analyzed the footage, they noticed subtle nuances in the narwhals’ behavior. Footage even captured one instance of a narwhal interacting with a fish by repeatedly nudging it with its tusk — which is actually a giant tooth — without attempting to eat it.

When researchers observed a lack of aggression in some interactions between narwhals and fish, they realized these scenarios were more similar to a cat-and-mouse game, in which the animals were chasing or “playing” rather than hunting, O’Corry-Crowe said.

Dennisvox

29 Mar 2025 - 11:43 pm

Narwhals may be using their tusks to play, new study finds
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Scientists say they have the first recorded video evidence of narwhals using tusks not only to strike and manipulate fish during feeding but also engage in what appears to be playful behavior, according to the latest research.

The narwhal, often referred to as the “unicorn of the sea” in a nod to its trademark tusk, has long remained an enigma. Scientists have observed few interactions of narwhals in their natural habitat, creating speculation about the purpose of the species’ distinctive spiraling tusk.
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Found predominantly in males, the tusk grows up to 10 feet (3 meters) long — and previous research has suggested it serves as a competitive display to secure mates. But now, with the help of drones, research conducted in the Canadian High Arctic has uncovered that a narwhal may use its tusk for more than just courtship.

In total, the researchers newly identified and described 17 distinct behaviors of narwhals involving prey. The findings revealed a wide range of interactions and dynamics between narwhals and fish as well as the extraordinary agility, precision and speed of their tusks to track moving targets, according to the study published February 27 in the journal Frontiers in Marine Science.

“Seeing that these animals are not actually hunting the fish but exploring, manipulating and interacting with it was really a game changer,” said lead author Dr. Gregory O’Corry-Crowe, a research professor in the Harbor Branch Oceanographic Institute at Florida Atlantic University.

Since so little is understood about this whale species, researchers like O’Corry-Crowe and his colleagues are working diligently to conduct studies to document narwhals’ unknown behaviors to better understand how these animals adapt in a rapidly shifting habitat as oceans warm and sea ice melts.
Narwhal exploratory behavior
The study team captured the groundbreaking footage using drones in Creswell Bay, on the eastern side of Somerset Island in Canada’s Nunavut territory, during the summer of 2022.

As the researchers analyzed the footage, they noticed subtle nuances in the narwhals’ behavior. Footage even captured one instance of a narwhal interacting with a fish by repeatedly nudging it with its tusk — which is actually a giant tooth — without attempting to eat it.

When researchers observed a lack of aggression in some interactions between narwhals and fish, they realized these scenarios were more similar to a cat-and-mouse game, in which the animals were chasing or “playing” rather than hunting, O’Corry-Crowe said.

Randyboano

29 Mar 2025 - 10:42 pm

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Bretttum

29 Mar 2025 - 03:07 am

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Yirichard

28 Mar 2025 - 02:45 pm

Генетично модифіковані яйця можуть змінити медицину — [url=https://science.justtips.online]дізнайтеся, як їх використовують у виробництві ліків[/url].

Donaldmam

28 Mar 2025 - 02:34 pm

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Greoslor

27 Mar 2025 - 11:20 am

Шукала нові ідеї для подорожей і натрапила на [url=https://northamerica.sff.in.ua]джазовий фестиваль у США[/url]. Уявляю, як звучить жива музика серед атмосферних вулиць Нью-Орлеану. Що ж, тепер це у моєму списку бажань.

Anthonyjak

26 Mar 2025 - 07:14 pm

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Howardhiese

26 Mar 2025 - 06:35 pm

[b]Prevent Vibration Damage – Get Professional Balancing with Balanset-1A[/b]

Unbalanced rotors can cause serious damage to your machinery. Bearings wear out faster, motors consume more power, and failures lead to expensive repairs. [b]Balanset-1A[/b] provides professional-grade vibration diagnostics and balancing, helping businesses save money and improve reliability.

[b]Key Benefits:[/b]
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26 Mar 2025 - 10:13 am

[b] Equilibrador portátil y analizador de vibraciones Balanset-1A [/b]

[b] Descripción: [/b]
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El Balanset-1A es un dispositivo compacto de doble canal diseñado para equilibrar y analizar la vibración de los mecanismos giratorios. Es ideal para equilibrar rotores como trituradoras, ventiladores, trituradoras, picadoras, ejes, centrífugas, turbinas y otras máquinas rotativas.

[b]Funciones y características principales [/b]

[b]Modo de medición de vibraciones [/b]

Tacómetro: Medición exacta de la velocidad de rotación (RPM).
Fase: Determina el ángulo de fase de la señal de vibración para un análisis preciso.
vibración 1x: Analiza y mide el componente de frecuencia primario.
Espectro FFT: Análisis exhaustivo del espectro de frecuencias de vibración.
Vibración general: Realiza un seguimiento de los niveles generales de vibración.
Registro de mediciones: Guarda los datos para su posterior análisis.

[b]Función de equilibrio [/b]

Balanceo de un solo plano: Equilibra los rotores en un plano para minimizar la vibración.
Balanceo en dos planos: Balanceo dinámico del rotor en dos planos.
Diagrama polar: Visualiza el desequilibrio del rotor en un gráfico polar para una colocación precisa de los pesos correctivos.
Recuperación de la última sesión: Facilita la reanudación de la última sesión de equilibrio.
Calculadora de tolerancia (ISO 1940): Determina el desequilibrio aceptable de acuerdo con ISO 1940.
Balanceo de la muela abrasiva: Utiliza tres contrapesos para equilibrar las muelas abrasivas.

[b]Gráficos y diagramas [/b]

Gráficos generales: Muestra los niveles generales de vibración.
gráficos 1x: Representa el comportamiento de la vibración en la frecuencia principal.
Gráficos armónicos: Representa la influencia de las frecuencias armónicas.
Gráficos espectrales: Representación visual del espectro de frecuencias para un análisis exhaustivo.

[b]Características adicionales [/b]

Archivo: Guarde y acceda a sesiones de equilibrio pasadas.
Informes: Genere informes detallados de equilibrio.
Reequilibrio: Repita fácilmente el proceso de equilibrio utilizando los datos guardados.
Balanceo de producción en serie: Perfecto para el balanceo de rotores de producción en masa.

[b] Contenido del paquete [/b]

El Balanset-1A viene con:

Bloque de medición con conexión USB.
Dos sensores de medición de vibraciones.
Sensor óptico (tacómetro láser) con base magnética.
Balanzas electrónicas.
Software (computadora no incluida, disponible como opción).
Estuche de transporte de plástico.

Price: [b]€2399[/b]
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