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関連する概念動画

Conservation of Declining Populations02:07

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
Brick Cutting Techniques01:08

Brick Cutting Techniques

Brick-cutting techniques involve various tools and methods to shape bricks for construction. A mason's hammer with a chisel-pointed end is used for basic shaping through sharp, precise strikes. For more complex shapes requiring higher precision, a power saw with a water-cooled diamond blade is used.
Cut bricks are categorized by size. Bricks cut to half their original length are called half-bats, while those cut to three-fourths their length are known as three-fourth bats.
Special types of cut...
Steel Manufacturing01:26

Steel Manufacturing

Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
Wood Products01:21

Wood Products

Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
Machines01:19

Machines

Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. One example of a machine is the cutting plier, which is used to cut wires by applying forces to its handles. When equal and opposite forces are exerted on the handles of the cutting plier, they cause the cutting edges to come together and apply equal and opposite reaction forces on the wire, which are greater than the applied forces.
A free-body diagram of the...
Introduction to Wood01:19

Introduction to Wood

Wood, derived from trees, is a versatile and widely used construction material. Trees feature a trunk surrounded by a protective layer of dead bark. Beneath this outer layer lies the living bark, followed by the cambium, and then the sapwood which transitions into heartwood as it matures. At the center of the trunk is the pith. The age of a tree can be discerned by examining its growth rings, which are concentric bands visible in the trunk's cross-section.
The structural integrity of the wood...

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関連する実験動画

Updated: Jul 12, 2026

Behavioral Assessment of Manual Dexterity in Non-Human Primates
16:00

Behavioral Assessment of Manual Dexterity in Non-Human Primates

Published on: November 11, 2011

北部ブルージャイの工具製造と工具使用

T B Jones, A C Kamil

    Science (New York, N.Y.)
    |June 8, 1973
    PubMed
    まとめ

    北部青鳥 (Cyanocitta cristata) は,新聞紙を道具として使って,届かないところにある食べ物を回収する. ジャイの道具使用の行動は,モチベーションと食料の利用可能性によって影響を受けます.

    科学分野:

    • 動物の行動 動物の行動
    • コグニティブ・エトロジー (Cognitive Ethology) とは,認知のエトロジー (Cognitive Ethology) とは,認知のエトロジー (Cognitive Ethology) とは,認知のエトロジー (Cognitive Ethology) とは,認知のエトロジー (Cognitive Ethology) とは,認知のエトロジー (Cognitive Ethology) とは,認知のエトロジー (Cognitive Ethology) とは
    • 航空インテリジェンス

    背景:

    • 道具の使用は,様々な動物種で観察される複雑な認知能力です.
    • 鳥の道具の使用を調査することで,鳥の問題解決能力と適応力についての洞察が得られます.

    研究 の 目的:

    • 北部青鳥 (Cyanocitta cristata) の道具使用行動を記録し,分析する.
    • この種の道具使用頻度に影響を与える要因を決定する.

    主な方法:

    • 実験室で飼育された北の青鳥を,制御された環境で観察した.
    • 食品ペレットを届かない場所に提示し,新聞を潜在的なツールとして提供します.
    • ツールの使用頻度を鳥のモチベーション状態と餌の存在に関連して定量化します.

    主要な成果:

    • 北部青鳥が,道具として使うために新聞紙の断片を裂いているのが観察されました.
    • 鳥たちはこれらの道具をうまく使って,他の方法では入手不可能な食品の小粒を拾い集めました.

    さらに関連する動画

    Advanced Workflow for Taking High-Quality Increment Cores - New Techniques and Devices
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    Advanced Workflow for Taking High-Quality Increment Cores - New Techniques and Devices

    Published on: March 10, 2023

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    11:35

    Fabrication of an Expandable Brain Matrix Customizable Across Developmental Stages

    Published on: February 20, 2026

    関連する実験動画

    Last Updated: Jul 12, 2026

    Behavioral Assessment of Manual Dexterity in Non-Human Primates
    16:00

    Behavioral Assessment of Manual Dexterity in Non-Human Primates

    Published on: November 11, 2011

    Advanced Workflow for Taking High-Quality Increment Cores - New Techniques and Devices
    07:40

    Advanced Workflow for Taking High-Quality Increment Cores - New Techniques and Devices

    Published on: March 10, 2023

    Fabrication of an Expandable Brain Matrix Customizable Across Developmental Stages
    11:35

    Fabrication of an Expandable Brain Matrix Customizable Across Developmental Stages

    Published on: February 20, 2026

  • この道具使用行動の頻度は,ジャイの動機付け状態と食物ペレットの利用可能性に大きく依存していた.

    • 結論:

    • 北部青鳥は,道具の製造と応用を含む,洗練された道具使用能力を発揮しています.
    • この行動は,コルヴィッドの認知的な柔軟性と問題解決のスキルを実証しています.
    • 動機と報酬の可用性などの環境的および内部的要因は,鳥の道具使用表現を決定的に調節します.