長時間撮影に対応した水中デジタルカメラKG－6の開発と性能評価

長時間撮影に対応した水中デジタルカメラKG−6の

開発と性能評価

著者

伊藤 麻美, 井上 喜洋, 五島 正哲

雑誌名

鹿児島大学水産学部紀要=Memoirs of Faculty of

Fisheries Kagoshima University

巻

56

ページ

37-43

別言語のタイトル

Development and Evaluation of a System to Take

Underwater Photographs for Long Periods of

Time Using Digital Camera KG-6

1 ৅঱ോఱڠକॲڠ໐ (Faculty of Fisheries, Kagoshima University, 4-50-20 Shimoarata, Kagoshima, 890-0056 Japan) (*Email:a-ito@fi sh.kagoshima-u.ac.jp)

2 ࢃ൥ͺ·ͺΞͻΛ·ΑȪڼȫ(Goto Aquatics Co.LTD., 1160-5 Manazuru, Ashigarashimogun, Kanagawa, 259-0201 Japan)

ಿশۼज़גͅచ؊̱̹କಎΟΐΗσ΃ιρ KG-6 ͈ٳอ͂଻ෝບث

ȁ߃ාȄΟΐΗσ΃ιρȪոئȄΟΐ΃ῖઠ̳ͥȫ͈ ຽݞฺ̞ͅȄࡢș͈Οΐ΃ιͅచ؊̱̹କಎज़גဥఛգ ယܕȪոئȄΧ;ΐϋΈ͂ઠ̳ͥȫ̦ैୋ̯ͦȄକಎ́ ͈ज़ג̦ယօ̞̈́̽̀ͥͅȃ̱̥̱Ḙ͈̏ͦͣକಎज़ג ௡౾͉τΐλȜஆକ൝͈́ঀဥ̦৽̜̹́ͥ͛಺औࡄݪ ဥ̱͈͂̀୭౾͞ಿশۼज़ג൝͉̞̞̞࢜̀̈́ͅȃ ȁݽު࡛ા̤̫ͥͅକಎד௨͉ݿ͈ݿ࿌͈͒੄වͤ͞୆ ఠ൝͈۷ख़̤̤̞ͅͅ࿨ၛ̾1ȫȃݿ࿌͈͒କಎज़ג௡౾ ͈୭౾̽̀͢ͅ࿌ඤ͈́ݿ͈࣐൲̦ྶ̥ͣ͂̈́ͦ͊Ȅݿ ࿌͈٨ၻ͞ൎ࿌ાਫ਼͈٨஝൝͈ܿ੅࢜ષ̦̾̈́ͥͅ2ȫȃ ȁ̭ͦ́͘ͅକಎज़גဥΫΟ΂΃ιρ͈ٳอ͉̤̭̈́ͩ ̧̹̦ͦ̀3ȫḘ͈̏ͦͣΫΟ΂΃ιρ͉๱ુࣞͅث̜́ Abstract

Underwater photographs of fi shing gears and fi sh behavior are helpful for fi shery technical developments and natural environment investigations. Although the spread of digital cameras is progressing, there are few which are easy to handle and have a reasonable price, and can be used for taking underwater images for a long period of time. We designed and engineered an underwater digital camera which combines a commercial digital camera and stroboscopes and can be used for observations in coastal fi sheries surveys. The housing that stored the digital camera and stroboscopes could withstand underwater pressure to a depth of 400m. We used a voltage controller to extend battery duration time and be able to take photographs for longer time. Maximum performance lasted 19 hours, taking photographs every 60 seconds interval. Photography experiments were conducted using a trawl net which was towed at a 160m depth and a small set net located at a 10m depth. In both we succeeded to take the good photographs at intervals of 30 seconds or 60 seconds.

չ൥ཻ๼Ȅ

1

_{*ȁ֔ષܔဢȄ}

1

ȁࡼോୃഓ

2

Development and Evaluation of a System to Take Underwater Photographs for Long

Periods of Time Using Digital Camera KG-6

Asami Ito,

1

_{* Yoshihiro Inoue,}

1

and Masaaki Goto

2

Key words : underwater digital camera, housing, dry cell battery, voltage controller.

̷͈ͤ୓গْ௨๊͉͈֚Οΐ΃ιͤ͢Ⴆ̭̦ͥ͂ఉ̥̽ ̹ȃΟΐ΃ιͥ͢ͅକಎज़ג͉ΫΟ΂΃ιρ͈́ज़גͅ ๤͓հث́Ȅ̥̾஛ྶ̈́୓গْ௨ͬං̧̭̦ͥ͂́ͥȃ ̱̥̱Ȅ಺औࡄݪဥͅै̹ͣͦΧ;ΐϋΈͬঀဥ̱̹Ο ΐ΃ί͜ତশۼ೾ഽ͈ज़ג̴̢̱̥̤̭̈́Ȅಿশۼ͈ ज़ג̧̦́ͥΟΐ΃ι͉ઁ̞͈̦࡛̈́ે̜̹́̽ȃུࡄ ݪ́ঀဥ̱̹Οΐ΃ι͜൚੝୺ဥ͈ഩ౻̦ಿ঵̻̱̞̈́ ̹͛Ȅତশۼ͈ज़ג̦ࡠٮ̜̹́̽ȃಿশۼज़ג̦خෝ ̈́ΏΑΞθͬΧ;ΐϋΈඤͅ൏श̳ͦ͊Ȅͤ͢ఉْ̩͈ ௨ͬ৾ං̧̺̫̩́ͥ́̈́ఈ͈Οΐ΃ι͈͒؊ဥ͈خෝ ଻̜ͥ͜ȃ ȁུࡄݪ͉́ঌ์͈Οΐ΃ι͈ಿশۼज़גͬ৘̵࡛̯ͥ

38 ৅঱ോఱڠକॲڠ໐ܮါȁలĶķےȪijııĸȫ ̹͛Ȅഩ౻͈௩୭ฺ̭͂ͦ̽̀ͅຈါ̈́ഩႁଷࢄٝႹ͈ ٳอ̤̭̹ͬ̈́̽ȃ̹͘Ȅज़גΏΑΞθ͈଻ෝͬບث̳ ̹ͥ͛ͅज़גخෝশۼȄݻၗْ̤͍͢ڙͬݥ͛ͥ৘ࡑͬ ̤̭̹̈́̽ȃ̯ͣͅȄࡄݪͅރ̳̭̦ͥ͂خෝْ̈́௨̦ ං̥ͣͦͥͬږ෇̳ͥ৘ࡑ̤̭̹̈́̽͜ȃ ȁ ऺၳ༹༷͂ ȁུࡄݪ͉́ȄΟΐ΃ιͬ״܅֖́ঀͩͦͥݽߓ̤͍͢ ೲה࿌൝৾ͤͅັ̫̀Ȅ֚೰শۼ͈ۼڞ́Οΐ΃ι͈ज़ ג̤̭̞ͬ̈́Ȅ̥̾ಿশۼঀဥͬخෝ̳͂ͥ௡౾͈ٳอ ͬ࿒ດ̱̹͂ȃٳอ̱̹ΏΑΞθ͉ঌ์̯̞ͦ̀ͥΟΐ ΃ι̤͍͢ΑΠυδࣽٝͅٳอ̱̹Χ;ΐϋΈ͂ഩ࡙ͬ ழ̵͙ࣣ̹͈̥ͩͣ͜ࢹ଼̯̞ͦ̀ͥȃ Οΐ΃ι ȁ ུ ࡄ ݪ ́ ঀ ဥ ̱ ̹ Ο ΐ ΃ ι ͉ RICOH ২ ୋ ͈ȶGR DIGITALȷ̜́ͥȃ̭͈Οΐ΃ιͬ஖఼̱̹ၑဇ͉ٸັ ̫έρΛΏνဥ͈୪௽౤ঊ̦๵̞̭ͩ̽̀ͥ͂Ȅഩ౻ ̦঵௽̳ͥࡠ֚ͤ೰শۼۼڞ́ΏλΛΗȜ̦୨ͦͥͼϋ ΗȜΨσज़ג̦ࠑ௽̱̀خෝ̜̭́ͥ͂Ȅ̤͍͢հث́ ̜̭̦ͥ͂ݷ̬ͣͦͥȃ̹͘Ȅࢩْ̞ڙ́ज़ג̳̹ͥ͛ ͅࢩڙ΋ϋΨȜΐοϋτϋΒȪRICOH ২ୋȇGW-1 ̤ ͍͢ GH-1ȫͬঀဥ̱̹ȃࢩڙτϋΒͬ৾ͤັ̫̹Οΐ ΃ιͬ Fig.1 ͈ A ͅা̳ȃ ΑΠυδ ȁ๊֚ͅΟΐ΃ι͈੗ୃΑΠυδ͉ࣞث̜̹́ͥ͛հث ́ව਀̦ယօ̈́ΑΠυδȪκȜςΑ২ୋȇΪ΃σ઀಴ 6ȫ ͬ 2 రঀဥ̱̹ȃུࡄݪ́ঀဥ̱̹ΑΠυδْ͈௨ͬ Fig.1͈ B ͅা̳ȃ̭͈ΑΠυδ͈ഩ࡙͉ͅ 1 ర̧̾ͅ ౙ२ۋഩ౻ 4 ུͬঀဥ̳͈ࣣͥ́ࠗ 8 ུ͈ۋഩ౻ͬঀဥ ̱̹ȃ Χ;ΐϋΈ ȁུࡄݪ́ैୋ̱̹Χ;ΐϋΈͬ Fig.2 ̤͍͢ Fig.3 ͅ া̳ȃFig.2 ͈ A ͉Χ;ΐϋΈୃ࿂ͬȄB ͉ࢃ༷ͬা̱ ̞̀ͥȃΧ;ΐϋΈ͉Οΐ΃ῖΑΠυδ̷̸ͬͦͦ ਓො̳ͥ׫ൟယܕͬΑΞϋτΑࣙโ̞̺́̾̈́ࢹ௮̱͂ ̹ȃ ȁFig.3 ͈ A ͅা̱̹Οΐ΃ιਓො໐͉΃ιρ͈ୃ࿂τ ϋΒ௰͈ڀͬະ൫ྶ̈́ MC ΢ͼυϋ 801Ȅ׫ൟယܕͬΑ ΞϋτΑࣙȄࢃ༷௰͈ڀͬ൫ྶες΃ȜδΥȜΠਏড́ ̷̸ͦͦैୋ̱̹ȃ̹͘ȄτϋΒ௰͈ڀ͉ͅτϋΒஜ࿂ ͅཹ̧΄ρΑ͉ࣺ̺ͬ͛ͭௗͬ৾ͤັ̫̹ȃ΃ιρஜ࿂ ڀͅ΄ρΑௗͬழ͙ࣺ̺͈͉ͭ૗ओ͞ე͙ͬٝ๰̳̹ͥ ̜͛́ͥȃ̹͘ȄΟΐ΃ιͬࡥ೰̳ͥͺΗΛΙιϋΠͬ ؂اΫΣσڙऺ́ैୋ̱৾ͤັ̫̹ȃ ȁFig.3 ͈ B ͅা̱̹ΑΠυδਓො໐͉Ȅୃ࿂อ࢕௰͈ ڀͬ൫ྶες΃ȜδΥȜΠਏডȄ׫ൟယܕͬΑΞϋτΑ ࣙȄࢃ༷௰͈ڀͬ MC ΢ͼυϋ 801 ̷̸́ͦͦैୋ̱̹ȃ ̭͈ಎͅΑΠυδ 2 ࡢͬ৾ͤັ̫̹ȃ ȁΑΠυδ͈อ࢕͂Οΐ΃ι͈ΏλΛΗȜͬ൳ܢ̵̯ͥ ̹͛Ȅၰ৪ͬΏϋ·υΉȜήσ́ഩܨഎͅ୪௽̳ͥຈါ ̦̜ͤȄ;τΗϋਏড́ैୋ̱̹କྟ΋Υ·ΗȜͬΧ; ΐϋΈ͈Οΐ΃ιਓො໐͂ΑΠυδਓො໐͈ࢃ༷৾ͤͅ ັ̫̹ȃအș̈́৘ࡑ૬ഽͅచ؊̧̠́ͥ͢ͅȄΧ;ΐϋ Έ̤͍͢କྟ΋Υ·ΗȜ͉ఛգକ૬̦ 400 m ̠͂̈́ͥ͢ ͅ୭̱̹ࠗȃ ഩ࡙ ȁ ঀ ဥ ̱ ̹ Ο ΐ ΃ ι ͉ ඤ ௬ ഩ ࡙ ͂ ̱ ̀ ୺ ဥ ਰ ഩ ౻ ȪDB-60ȄςΙ;θͼ΂ϋਰഩ౻ȫ̹͉͘ౙঅۋഩ౻ 2 ུȪͺ σ΃ςۋഩ౻Ȅ΂΅ΏρͼΡۋഩ౻̹͉͘ΣΛΉσକள ਰഩ౻ȫͬ೒ુঀဥ̳ͥȃ̭͈Οΐ΃ιͬঀဥ̱̀ 12 শۼոષ͈ಿশۼज़גͬخෝ̳̭ͥ͂ͬͅ࿒ດ̱̹͂ȃ Χ;ΐϋΈඤ͈ߗ̧ΑβȜΑͬခ࢘ͅڰဥ̱̀ఉତ͈ۋ ഩ౻ͬ൏श̱Ȅ̷͈ഩႁͬ࢘ၚഎͅঀဥ̧̠́ͥ̈́͢ഩ ঊٝႹ͈ٳอ̤̭̹ͬ̈́̽ȃۋഩ౻͉ΑΠυδͅঀဥ̳ ͥഩ౻͂൳ਅ႒̜̭̤͍́ͥ͂͢ાਫ਼ͅ۾̴ͩͣව਀̦ ယօ̭̥̈́͂ͣౙ२ۋഩ౻̱͂Ȅಿশۼ͈ঀဥ̦خෝ̈́ ςΙ;θۋഩ౻ȪFUJIFILMȄܳഩႁ 1.5 Vȫ͂΂΅Ώρ ͼΡۋഩ౻ȪPanasonicȄܳഩႁ 1.5 Vȫͬ஖఼̱̹ȃ ȁུࡄݪ́ဥ̞̹Οΐ΃ιͬΧ;ΐϋΈͅ௡಍̳ͥ͂ ౙ२ۋഩ౻ 6 ུͬΧ;ΐϋΈඤͅਓ̧̭̦̹͛ͥ͂́ ̹͛Ḙ̏ͦͣۋഩ౻ 6 ུͬೄႥͅ୪௽̱̹ȃೄႥͅ୪௽ ̱̹͈͉Ȅ໼Ⴅ̷̸̞͈̾̈́́ͦͦͅۋഩ౻ͅഩգओ̦ ̜̹̽ાࣣͅഩգ͈೩̞ഩ౻ͅഩၠ̦ၠࣺͦͭ́อ෎̳ ͥخෝ଻̦̜̭ͤͦͬٝ๰̳̹̜ͥ͛́ͥȃ̱̥̱Ȅۋ ഩ౻ 6 ུ͈୪௽ͤ͢ͅഩգ̦ 9 V ̩͂ࣞ̈́ͥȃ୺ဥਰഩ ౻͈ܳഩႁ͉ 3.7 V ̜̭̥́ͥ͂ͣ൳೾ഽ͈ഩգ͈́ഩ ႁރݯ̦ຈါ͂ࣉ̢̹ȃոષ͈̭̥͂ͣȄഩգͬ 3.7 V ͅ಺ା̱Ȅ̥̾ഩႁͬ࢘ၚഎͅރݯ̧́ͥഩঊٝႹ͈ै ୋ̦ຈါ̹͂̈́̽ȃ ȁഩգଷࢄ௡౾̱͂̀ 9 V ͈වႁഩգͬ࿩ 3.7 V ́੄ႁ ̳̭̦ͥ͂خෝ̈́ΑΞΛίΘ;ϋ΋ϋΨȜΗͬழ͙ࣺͭ ̺ഩঊٝႹͬဥ̞̹ɦ 1ȃ̭͈̭͂ͤ͢ͅഩႁͬ࢘ၚഎͅ ၌ဥ̳̭̦ͥ͂خෝ̹͂̈́̽ȃ̭̭́ঀဥ̱̹ΑΞΛί Θ;ϋ΋ϋΨȜΗ͉ζ΅ΏθȆͼϋΞΈτȜΞΛΡȆί υΘ·Μ২ୋ͈ MAX1776 ̜́ͥɦ 1 ȃMAX1776 ͉වႁ শ͈ 4.5 V ̥ͣ 24 V ͈ഩգͬ੄ႁশͅ 1.25 V ̥ͣ 24 V ͅ಺ାخෝ̈́ഩঊ໐຦̜́ͥȪडఱ੄ႁ 600mAȄඤ໐ ɦ 1

Maxim Integrated Products.(2003). 24V, 600mA internal switch, 100% Duty Cycle, Step-Down Converter, 2:1-13.

Fig. 1. Digital camera and electronic fl ash.

A shows the digital camera with wide-angle lens and B shows the electronic fl ash.

Fig. 2. Housing.

A shows the front of the housing and B shows the back.

Fig. 3. Illustration showing digital camera housing.

40 ৅঱ോఱڠକॲڠ໐ܮါȁలĶķےȪijııĸȫ ೷ࢯ 0.4 ϮȫȃഩঊٝႹ͉ MAX1776 ͈ୋ຦ૂ༭ͅࠇश ̯̞ͦ̀ͥٝႹ଎ͬ४ࣉ̱͂ȄFig.4 ͅা̳͈̱̹͂͜ȃ MAX1776͈ IN ౤ঊ͂ GND ౤ঊ͈ۼͅ 9V ͈ഩգͬව ႁ̱̹শͅȄVout͂ GND ౤ঊۼ͈ഩգ̦࿩ 3.7 V ̈́ͅ ̠ͥ͢خ་೷ࢯ R1͂ R2ͬ಺ା̱̹ȃ ȁഩঊٝႹ͈ܖโ͉ۜ࢕ܖโͬحࢥ̱̀ैୋ̱Ȅഩঊ໐ ຦̭ͬͦ৾ͤͅັ̫̹ȃۜ࢕ܖโ͈حࢥ̤͍͢ഩঊ໐຦ ͈৾ͤັ̫ैު͉৅঱ോఱڠࢥڠ໐ಎ؇৘ਠࢥા̤̭́ ̹̈́̽ȃ̭͈ഩգଷࢄ௡౾̥ͣ੄ႁ̳ͥഩգͬͤ͢հ೰ ރݯ̵̯̹ͥ͛Ȅैୋ̱̹ഩঊٝႹ͂Οΐ΃ῖ͈ۼͅ ഩܨඵਹ௄΋ϋΟϋ΍ C3ͬ୪௽̱̹ȃFig.5 ͅা̳̠͢ ͅȄͺΛΗΙιϋΠͅഩঊٝႹͬਓො̱ഩ౻γσΘȜ 6 ࡢͬ୪௽̱̹ȃ̭ͦͅΟΐ΃ιͬΥΐ́ࡥ೰̱̹ȃ ज़ג৘ࡑ ȁज़גΏΑΞθ͈଻ෝͬບث̳̹ͥ͛ͅज़גخෝশۼȄ ݻၗْ̤͍͢ڙͬݥ͛ͥ৘ࡑ̤̭̹ͬ̈́̽ȃ̹͘Ȅ৘ࡑ ͅރ̳̭̦ͥ͂خෝْ̈́௨̦ං̥ͣͦͥͬږ෇̳ͥ৘ࡑ ̤̭̹̈́̽͜ȃ ȁज़גخෝশۼ͈ບث৘ࡑ͉́Ȅ๊֚എͅঀဥ̳ͥഩ౻ ͬΟΐ΃ιͅ௡಍̱̹ાࣣ͂ࣽٝٳอ̱̹͈ͬ͜๤ڛ̱ ̹ȃஜ৪̤̞͉̀ͅȄ୺ဥਰഩ౻ȪDB-60ȫ̹͉͘ౙঅ ΂΅ΏρͼΡۋഩ౻ 2 ࡢͬঀ̞Ȅज़גۼڞͬ 30 ຟ͂ 60 ຟͅ୭೰̱̀Ȅज़גخෝ̈́डఱশۼͬݥ̹͛ȃࢃ৪̤ͅ ̞͉̀Ȅౙ२ςΙ;θۋഩ౻ͬ 6 ࡢঀ̹̽ાࣣ̞̾̀ͅ ͉ज़גۼڞͬ 30 ຟ͂ 60 ຟͅ୭೰̱Ȅౙ२΂΅ΏρͼΡ ۋഩ౻ͬ 6 ࡢঀ̹̽ાࣣ̞͉̾̀ͅज़גۼڞͬ 60 ຟͅ ୭೰̱̀ݥ̹͛ȃ ȁज़גخෝݻၗࠗ௶৘ࡑ͉೰౾࿌ͬచય̱̤̭͂̀̈́ ̞Ȅ׋൲ા௰࿌໐͂Οΐ΃ῖ͈ݻၗͬ་ا̵̯̦̈́ͣ ࿌࿒ͬज़ג̱̀ݽ࿌͈࿒ତ̧̦͉̽ͤ͂ږ෇̧́ͥࡠٮ ͈ݻၗ̜́ͥज़גخෝݻၗͬଔ೰̱̹ȃ̹͘Ȅං̹ͣͦ ْ௨ͅৢ̯̹ͦକ໹༷͈࢜࿒ତ̥ͣକ໹༷͈࢜ज़גخෝ ໙ W ͬଔ೰̱Ḙ͈̏শ͈ज़גచય໤͈́͘ݻၗ D ̥ͣ ষ৆ْͤ͢ͅڙϾͬݥ̹͛ȃ Ȫ1ȫ ȁ̤̈́Ȅచય̱̹͂೰౾࿌͉৅঱ോࡇධ̯̾͘ঌ͈༌׆ ݽࢽؗͅ୭౾̱̹ޗ֗৘ਠဥ઀߿೰౾࿌̱̹͂ȃ ȁ୭౾߿͈ݽߓ̱͂̀೰౾࿌Ȅ֊൲߿͈ݽߓ̱͂̀Π υȜσ࿌̷̸ͦͦͅज़גΏΑΞθͬ৾ͤັ̫̀ज़ג̤ͬ ̷ْ̭̞͈̈́௨ͬບث̱̹ȃ ȁ̭̭́చય̱̹͂೰౾࿌͉ज़גخෝݻၗࠗ௶৘ࡑ͂൳ အ͈͈̱̹͂͜ȃज़גΏΑΞθ͉ Fig.6 ͅা̳̠͢ͅȄ ೰౾࿌ֵ࢛વঊၔ௰͈٬ೲ߃̩৾ͤͅັ̫Ȅ࿌ඤͬٝဋ ̳ͥݿֵ̤͍࢛̥ͣ͢࿌ඤٸ͒ව੄࿌̳ͥݿͬज़גచય ̱̹͂ȃഩ࡙͉ٳอ̱̹ഩ࡙ͅౙ२ςΙ;θۋഩ౻ 6 ུ ͬ୪௽̱̹͈ͬ͜ঀဥ̱̹ȃ ȁΠυȜσ࿌͈́ज़ג͉Ȅ৅঱ോఱڠ້௺Ⴏਠ஑ȶ̥̮ ̱͘܃ȷ͈ධୌ੨ോ̤̫ͥͅ৘ਠ࣎٬͈́ΠυȜσ࿌ௌ ު̤̭̹́̈́̽ȃज़גΏΑΞθ͉ Fig.7 ͅা̳̠͢ͅକ ૬࿩ 160 m ͬה࿌̯ͦͥΠυȜσ࿌͈ऒ࡝௰ષ౲௿࿌໐ ඤ௰৾ͤͅັ̫Ȅ฽చ௰͈௿࿌ͬ࿒ດͅज़ג̤̭ͬ̈́̽ ̹ȃΠυȜσ࿌ௌުশۼ̦ 1 ٝ 2 শۼ೾ഽ̜͈́ͥ́Ȅ ഩ࡙͉ঌ์͈୺ဥਰഩ౻ͬঀဥ̱̹ȃ ࠫض̤͍͢ࣉख़ ȁུ৘ࡑ́ݥ̹͛ज़גخෝশۼͬ Table 1 ͅা̱̹ȃ֚ ๊എͅঀဥ̳ͥഩ౻ͬဥ̞̹ાࣣȄ୺ဥਰഩ౻͉̞́ ̴͈ͦज़גۼڞ́͜ 3.5 শۼ̥ͣ 4 শۼ͈ज़ג̦خෝ́ ̜ͤȄౙঅ΂΅ΏρͼΡۋഩ౻͉́൳အͅ࿩ 1 শۼ೾ഽ ͈ज़ג̦خෝ̜̹́̽ȃ̭ͦͣͅచ̱̀ࣽٝٳอ̱̹ഩ Fig. 4. Design of electronic circuit.

C1 and C2 show condensers of 100µF, C3 shows a condenser

of 1F, R1 and R2 show a variable condensers of 50kΩ, L

shows a coil of 4.7µH and D shows a shot-key diode, Vin and

Vout shows a voltage at each point.

Fig. 6. Position of underwater digital camera and housing on a“Kago-type”set-net.

42 ৅঱ോఱڠକॲڠ໐ܮါȁలĶķےȪijııĸȫ

Fig. 8. Striped catfi sh (Plotosus lineatus) inside a set net. Fig. 9. Thread-sail fi lefi sh (Stephanolepis cirrhifer) inside a set net.

Fig. 10. Japanese jack mackerels (Trachurus japonicus) inside a set net.

Fig. 11. Japanese anchovy (Engraulis japonicus) inside a set net.

࡙ͬ୪௽̱̹ાࣣ͈Ⴒ௽ज़גশۼ͉ज़גۼڞ 30 ຟ̤͢ ͍ 60 ຟ͈ા̷̸ࣣ́ͦͦȄςΙ;θۋഩ౻͈ঀဥ́ 12 শۼ 57 ໦̤͍͢ 19 শۼ 40 ໦̜́ͤȄज़גۼڞ 60 ຟ́ ΂΅ΏρͼΡۋഩ౻ͬঀဥ̱̹ાࣣ͉́ 11 শۼ 44 ໦́ ̜̹̽ȃࣽٝٳอ̱̹ഩ࡙ͬ୪௽̱̹ાࣣȄ୺ဥਰഩ౻ ͬഩ࡙̱̹͂ાࣣ͂๤ڛ̱̀ज़גخෝশۼ͉࿩ 3 ෼ոષ ̹͂̈́̽ȃ̭͈̭̥ͦͣ͂ͣ൚੝͈࿒ດ̜̹́̽ 12 শ ۼոષ͈Ⴒ௽ज़ג̦خෝ̹͂̈́̽ȃ̹͘Ȅ೰౾࿌́ݥ͛ ̹ज़גخෝݻၗ͉ 3 m ̥ͣ 4 m ͂ଔ೰̯ͦȄज़גخෝ ْ̈́ڙ͉ (1) ৆ͤ͢କ໹༷̞࢜̾̀ͅ 60ɋ̥ͣ 80ɋ́ ̜̭̦̥̹ͥ͂ͩ̽ȃ ȁज़ג́ංْ̹ͣͦ௨͈႕ͬ Fig.8 ̥ͣ Fig.13 ͅা̳ȃ ୭ ౾ ߿ ͈ ݽ ߓ ́ ̜ ͥ ೰ ౾ ࿌ ́ ͉ Fig.8 ̤ ͢ ͍ Fig.9 ͅ া̳̠͢ͅΌϋΒͼ͞΃χΧΆ൝͈ࡢఘ̦ज़ג̯ͦȄ Fig.10̤͍͢ Fig.11 ͅা̳̠͢ͅζͺΐ͞΃Η·Ιͼχ Ώ͈߲ဋ͜ज़ג̯̹ͦȃ࿡ۼ̥ͣྶ̫༷̥̫͉̀ͅ๤ڛ എ஛ྶ̈́ד௨̦ज़ג̧̹̦́Ȅಓۼ͈ज़ג͉́࢕ႁ̦ఱ ̧̨̳̹ͥ͛ΧτȜΏοϋ̦̭ܳͤȄచય໤͈ד௨̦ະ ஛ྶ̭̦̜̹̈́ͥ͂̽ͅȃ̹͘Ȅ֊൲߿͈ݽߓ̜́ͥΠ υȜσ࿌́ज़ג̯̹ͦה࿌͈အঊͬ Fig.12 ͂ Fig.13 ͅ া̳ȃFig.12 ͉́࿌̦಍ೲ̱̞̞̦̀̈́ Fig.13 ͉́಍ೲ ̱̀ग̦ໍ̞ષ̦ͥેఠ̦̥ͩͥȃ̹͘ȄΧτȜΏοϋ ̦อ୆̵̴฽చ௰͈௿࿌̦஛ྶͅज़ג̯̹ͦȃ̭͈̭͂ ̥ͣ 10 m ոષၗ̹ͦచય໤̦ज़ג̧̢̹̞́͂ͥȃ ȁ͈ࣽٝज़גΏΑΞθ͈ٳอͤ͢ͅज़גশۼ͈װಿ̦خ ෝ̹̦̈́̽ͅȄႲ௽ज़ג̦ 10 শۼ಼̢̜̹̥ͬͥͤͣ ΑΠυδ͈อ࢕ْ̦̞̈́௨̦ංͣͦই̹͛ȃࡔ֦̱͂̀ ഩ࡙ഩႁ̦ࡘઁ̱Ȅ୭೰̱̹ज़גশۼۼڞඤͅΑΠυδ ඤ͈΋ϋΟϋ΍͈͒ਰഩ̦ਰ໦̴̧́อ࢕ٝତ̦ࡘઁ̱ ̹͈͂͜ࣉ̢̹ȃ൚੝͉Οΐ΃ι͈ज़גخෝশۼ͈װಿ ̦هఴ̜̹̦́̽Ȅज़גশۼͬװಿ̧̳̭̦̹̹ͥ͂́ ͛ΑΠυδอ࢕خෝশۼ͈װಿ͈ຈါ଻͜੄̧̹̀ȃࣽ ࢃȄज़גۼڞ͂ΑΠυδอ࢕خෝশۼ͈۾Ⴒͬ಺͓ΑΠ υδ͈ٸ໐ഩ࡙͈ٳอ̤͍͢ఱယၾ΋ϋΟϋ΍͈၌ဥ൝ ͬ࠿൦̳ͥထ೰̜́ͥȃ̹͘ȄΧτȜΏοϋచॐ̱͂̀ ͉ಓ࿡͈ু൲୨ͤఢ̢Ȅ̜̞͉ͥอ࢕࿂͈͒ڐ८ະ൫ྶ โ͈၌ဥ൝̦ຈါ̜́ͥȃ ȁ೰౾࿌͂ΠυȜσ࿌͈ज़גݻၗ͈֑̞͉ȄΠυȜσ࿌ ͈ה࿌କ૬̦ 160 m ́ज़גশ͈൫ྶഽ̦̥̹͈ࣞ̽ͅ చ̱Ȅ೰౾࿌͈ાࣣ͉൫ྶഽ̦೩̞̞̹͂̽ఱ̧̈́ओ̦ ֦̱̞͈ܳ̀ͥ͂͜ࣉ̢ͣͦͥȃ̭͈̭̥͂ͣ๤ڛഎ൫ ྶഽ͈೩̞״܅ݽા͈́ज़גخෝݻၗ͉ 3 m ೾ഽ̢̞͂ ͥȃ༷֚Ȅ൫ྶഽ̦̞ࣞݽા͈́ज़גخෝݻၗ͉͈ࣽٝ ৘ࡑ̥ͣ 10 m ոષ̜́ͥ͂ଔ೰̯̦ͦͥྶږͅা̳̭ ̧̦̞͂́̈́ȃ̹͘Ȅ൫ྶഽ̦̩ࣞચഽ̦೩̞ાࣣ͉Α Πυδ࢕͈ൢోخෝݻၗͅջం̳ͥ͂ࣉ̢̦ͣͦͥȄུ ৘ࡑ͉́ΑΠυδ࢕͈ൢోخෝݻၗͬݥ̞̞̭͛̀̈́͂ ̥̭͈ͣത̞̾̀͜ͅྶږ̧̞́̈́ͅȃࣽࢃḘ͈̏ͦͣ ൫ྶഽ͞ચഽͬΩριȜΗ̱̹͂ज़גخෝݻၗ͈ບثͅ ৾ͤழ͚ထ೰̜́ͥȃ ৫ৃ ȁུࡄݪ̮ͅފႁೀ̞̹৅঱ോఱڠକॲڠ໐୞ॄਕਔ੎ ޗ਎ȄΨΑΉΑȆͺȜΙΟͻσȆηΊσȆέͿΟς΋࣒ ঍ֳ̤͍͢࿤୍֚੩ޗۜͅ৫͈փͬນ̳ȃ̹͘Ȅਹါ̈́ ٨ၻത͈̜֚̾́ͥΟΐ΃ιഩ࡙͈ैୋ̮ͅފႁೀ̞̹ ৅঱ോఱڠࢥڠ໐ಎఆგຳܿ੅୺࿝૖֥Ȅाུ໌ংܿ੅ ૖֥͍̈́ͣͅज़ג৘ࡑ̮ͅފႁೀ̞̹৅঱ോఱڠକॲڠ ໐ܿ੅໐໼ઐ৘ܿ੅ಿȄ܃ܻٗࢣܿ੅็ಿȄ໛ாੳࢩ௙ ྩ৽හȄಿ࿤ડ֚ܿ੅৽හ̤͍͢൐ܵܿ੅૖֥ۜͅ৫͈ փͬນ̳ȃ ४ࣉ໲ࡃ

1) Y. Inoue, Y. Matsushita and T. Arimoto (1993). The reaction behavior of walleye pollock (Theragra chalcogramma) in a deep / low temperature trawl fi shing ground. ICES Marine Science Symposia, 196: 77-79.

2) ֔ષܔဢȪ1992ȫ. ΅ϋ΋࿌͒වͥ΍Ή͈࣐൲ . ඾ུ೰౾ݽ ުފٛ , ̞̻̀ 81:1-14.

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