File:Xenophora japonica (Japanese carrier snail) 2 (24734395475).jpg
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原始文件 (1,780 × 1,850像素,文件大小:2.14 MB,MIME类型:image/jpeg)
摘要
描述Xenophora japonica (Japanese carrier snail) 2 (24734395475).jpg |
Xenophora japonica Kuroda & Habe, 1971 - Japanese carrier snail. (umbilical view) (public display, Bailey-Matthews Shell Museum, Sanibel Island, Florida, USA) The gastropods (snails & slugs) are a group of molluscs that occupy marine, freshwater, and terrestrial environments. Most gastropods have a calcareous external shell (the snails). Some lack a shell completely, or have reduced internal shells (the slugs & sea slugs & pteropods). Most members of the Gastropoda are marine. Most marine snails are herbivores (algae grazers) or predators/carnivores. The xenophorid snails (a.k.a. carrier snails), especially those in the genus Xenophora, are remarkable for their tendency to pick up other shells, skeletal fragments, rocks, or corals (sometimes still alive) from their surrounding environment and cement these objects to their own shells. The result looks like a pile of shells on the seafloor. Often, sponges and serpulid worm tubes are found encrusting the xenophorid shell - they contribute to the illusion that a xenophorid is simply a patch of seafloor. Xenophora carrier snails do this as a camouflage defense against predators. Decorator crabs are arthropods that engage in similar camouflage behavior (<a href="http://storage.montereybayaquarium.org/storage/animals/520x260/decorator_crab.jpg" rel="nofollow">storage.montereybayaquarium.org/storage/animals/520x260/d...</a>). Xenophorids are principally detritivores and occur on unconsolidated, fine-grained to coarse-grained to rubbly substrates. From museum signage: "The worldwide family of carrier-shells has for millions of years had a natural habit of attaching other shells and small objects to themselves. The family name, Xenophoridae, means "bearer" (phora) of "foreigners" (xeno). Of the 20 known living species, three live in the Caribbean Province, one in the Mediterranean, one in West Africa, and the remaining 15 in the Indo-Pacific oceans. Carrier shells will attach nearly any object within their reach. A choice of size and orientation is deliberately made. Only dead bivalves are selected and are always glued with the concave side up. Dead gastropods are always glued at the smaller, pointed end. A carrier-shell may take an hour to move an object into position with its proboscis. As many as 10 hours are taken to secrete enough new shell material to successfully "glue on" the new item." Classification: Animalia, Mollusca, Gastropoda, Xenophoroidea, Xenophoridae Some info. from Harasewych & Alcosser (1991) and Hill (1996). More info. at: <a href="https://en.wikipedia.org/wiki/Xenophora" rel="nofollow">en.wikipedia.org/wiki/Xenophora</a> |
日期 | |
来源 | Xenophora japonica (Japanese carrier snail) 2 |
作者 | James St. John |
许可协议
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这幅图片原始出处为Flickr的https://flickr.com/photos/47445767@N05/24734395475 ,作者为James St. John 。经机器人FlickreviewR 2在2019年10月22日审查后确定为采用cc-by-2.0的协议授权使用。 |
2019年10月22日
说明
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描绘内容
某些值没有维基数据项目
知识共享署名2.0通用 简体中文(已转写)
5 1 2016
摄影器材 简体中文(已转写)
曝光时间 简体中文(已转写)
0.01666666666666666666 秒钟
焦距比数 简体中文(已转写)
13
焦距 简体中文(已转写)
14.303 毫米
ISO速度 简体中文(已转写)
80
image/jpeg
文件历史
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日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
---|---|---|---|---|---|
当前 | 2019年10月22日 (二) 03:46 | ![]() | 1,780 × 1,850(2.14 MB) | Rudolphous | Transferred from Flickr via #flickr2commons |
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元数据
此文件中包含有扩展的信息。这些信息可能是由数码相机或扫描仪在创建或数字化过程中所添加。
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相机制造商 | Canon |
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相机型号 | Canon PowerShot D10 |
曝光时间 | 1/60秒(0.016666666666667) |
光圈值 | f/13 |
感光度(ISO) | 80 |
数据生成日期时间 | 2016年1月5日 (二) 17:35 |
镜头焦距 | 14.303毫米 |
图像标题 | |
宽度 | 4,000 px |
高度 | 3,000 px |
每色彩组分位数 |
|
像素构成 | RGB |
方向 | 正常 |
色彩组分数 | 3 |
水平分辨率 | 180 dpi |
垂直分辨率 | 180 dpi |
使用软件 | Adobe Photoshop Elements 13.0 (Macintosh) |
文件修改日期时间 | 2016年1月31日 (日) 13:27 |
亮度(Y)和色度(C)位置 | 重叠 |
Exif版本 | 2.21 |
数字化日期时间 | 2016年1月5日 (二) 17:35 |
每个色彩组分意义 |
|
图像压缩模式 | 3 |
APEX快门速度 | 5.90625 |
APEX光圈 | 7.40625 |
APEX曝光补偿 | −0.33333333333333 |
最大光圈 | 4.34375 APEX(f/4.51) |
测光模式 | 多区 |
闪光灯 | 闪光灯点亮、闪光灯强制开启、防红眼模式 |
支持的Flashpix版本 | 1 |
色彩空间 | sRGB |
焦平面X分辨率 | 16,460.905349794 |
焦平面Y分辨率 | 16,483.516483516 |
焦平面分辨率单位 | 英寸 |
感光方法 | 单芯片彩色区域传感器 |
文件来源 | 数码相机 |
自订图像处理 | 普通处理 |
曝光模式 | 手动曝光 |
白平衡 | 自动白平衡 |
数字变焦比率 | 1 |
场景拍摄类型 | 人像 |
使用的镜头 | 6.2-18.6 mm |
元数据最后修改日期 | 2016年1月31日 (日) 06:27 |
原始文件唯一ID | 44DD11A45C085546609D7361735D9646 |