HKWildlife.Net Forum 香港自然生態論壇
遊客:  註冊 | 登錄 | 龍尾 | YouTube | Facebook | English | Library | Blog | 幫助


 
標題: [河溪 Stream] [Overseas] Sicyopterus largocephalus in Iriomote Jun 2017
jasonpoon
蟲蛹
Rank: 3Rank: 3Rank: 3


UID 869
Total 1397
主題
回覆
精華 0
積分 3176
種子 3176
花蜜 1266
閱讀權限 50
註冊 2007-3-29
Pri. Camera:  Olympus
來自 HK
狀態 離線
發表於 2017-8-17 00:41  資料 短消息 
[Overseas] Sicyopterus largocephalus in Iriomote Jun 2017

One of the earliest described and most studied sicydiins. Watched many individuals (sizes circa 2-8cm) in lower reach of clear fast flowing stream with large boulders and rocky bottom. Water should be fresh and low salt content although its reaching the beach and mangrove soon. Isolated stepwise rock pools and rapids. Male in breeding color typically with red caudal and white pectoral fins, white dot in front of snout really looks like "rabbit's head". saddle shaped dark patches along the back. Female drape color with large belly and horizontal dark bar along the body sides.

Not easy to watch close and keeping about 1 metre distance from me. Noted a male guarding a territory over big boulder, about 4-6m in range diametric. Bottom with smaller individuals and other goby species probably Favonogobius and/or Rhinogobius. Kuhlia and probably Lutjanus in midwater. Water plant scarce.

S. largocephalus mostly attached to rock and in gracing motion scraping attached algae/diatom/substrate from rock surface. Swimming motion by quick darting or longer distance straight motion. May hide in holes and substrates, dominant male in display around territory and chasing individuals especially males out.

[ 本帖最後由 jasonpoon 於 2017-8-18 10:51 編輯 ]


圖片: Sicyopterus largocephalus M1a 1706 Iriomote.jpg (2017-8-17 00:41, 18.25 K)



圖片: Sicyopterus largocephalus M1b 1706 Iriomote.jpg (2017-8-17 00:41, 34.08 K)



圖片: Sicyopterus largocephalus M2a 1706 Iriomote.jpg (2017-8-17 00:41, 32.72 K)



圖片: Sicyopterus largocephalus Fa 1706 Iriomote.jpg (2017-8-17 00:41, 24.14 K)



圖片: Sicyopterus largocephalus Fb 1706 Iriomote.jpg (2017-8-17 00:41, 22.4 K)


本帖最近評分記錄
keith.nap   2017-9-27 17:52  種子  +3   讚 Like !!
獵隼   2017-8-18 00:14  種子  +10   
Chris   2017-8-17 23:12  種子  +8   眼前一亮 I was stunned !
頂部
jasonpoon
蟲蛹
Rank: 3Rank: 3Rank: 3


UID 869
Total 1397
主題
回覆
精華 0
積分 3176
種子 3176
花蜜 1266
閱讀權限 50
註冊 2007-3-29
Pri. Camera:  Olympus
來自 HK
狀態 離線
發表於 2017-8-18 10:00  資料 短消息 
The third pic probably a younger male not in breeding or dominant color, the fourth pic should have mistaken as a female but looked more like a male also in color.

Field ID for dominant male unmistakable, that of smaller individuals and females may confuse with other sicydiins if present.

It is suggested by a japanese fishwatcher that smaller co-habiting gobies could be Rhinogobius sp. possible R. nagoyae.
頂部
 


Untitled Document


當前時區 GMT+8, 現在時間是 2017-11-21 19:44

Powered by Discuz! 5.0.0  © 2006-2008 HKWildlife.Net
Processed in 0.026535 second(s), 10 queries , Gzip enabled
清除 Cookies - 聯繫我們 - HKWildlife.Net - Archiver