Two species of seabirds foraged in contrasting marine habitats across the cold-water belt along the coast of northern Hokkaido in the southwestern Okhotsk Sea
Two species of seabirds foraged in contrasting marine habitats across the cold-water belt along the coast of northern Hokkaido in the southwestern Okhotsk Sea
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两种海鸟在鄂霍次克海西南部北海道北部沿岸冷水带的对比鲜明的海洋栖息地中觅食
DOI：
10.1007/s12562-021-01576-9
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发表时间：
2022
影响因子：
1.9
通讯作者：
Watanuki Yutaka
中科院分区：
文献类型：
--
作者：
Nishizawa Bungo;Okado Jumpei;Mitani Yoko;Nakamura Tomohiro;Yamaguchi Atsushi;Mukai Tohru;Watanuki Yutaka
为了了解影响鄂霍次克海西南部冷水带觅食海鸟密度的环境因素，我们于2019年夏季在北海道东北海岸进行了为期1天（180 km横断面长度）的船上海鸟调查，沿着进行了潜在猎物（浮游动物和鱼类）生物量的声学观测，温盐仪测量和CTD观测。食浮游短尾剪水Ardenna tenuirostris（66%）和食鱼犀牛海雀Cerorhinca monocerata（28%）占主导地位，但在对比的栖息地觅食。一个大的觅食群的剪水被观察到在冷水带区，包括其前面与沿海大豆暖流水和近海新鲜的鄂霍次克海表面水，表面chlorophyllaconcentrations是最高的，但不相关的猎物（浮游动物）的生物量在任何空间尺度之间的4.6和9.2公里。与此相反，海雀的密度是高的，在沿海大豆暖流水，声学确定的鱼类生物量是大的，并表现出积极的关系，特别是在较低的层（29-104米深度）在任何空间尺度上的鱼类生物量。这种对猎物生物量反应的物种特异性差异可能与猎物搜索行为有关;即，小犀牛在水下靠视觉搜寻猎物，而短尾剪水则能利用视觉和嗅觉从空中定位浮游动物的位置。
To understand the environmental factors affecting the density of foraging seabirds across the cold-water belt in the southwestern Okhotsk Sea, we conducted a 1-day (180-km transect length) shipboard seabird survey off the northeastern coast of Hokkaido during summer in 2019, along with acoustic observations of potential prey (zooplankton and fish) biomass, thermosalinograph measurements, and CTD observations. Planktivorous short-tailed shearwatersArdenna tenuirostris(66% of total seabirds) and piscivorous rhinoceros aukletsCerorhinca monocerata(28%) were predominant, but foraged in contrasting habitats. A large foraging flock of shearwaters was observed in the cold-water belt zone, including its front with coastal Soya Warm Current Water and the offshore Fresh Surface Okhotsk Sea Water, where surface chlorophyllaconcentrations were the highest but not related to their prey (zooplankton) biomass at any spatial scale between 4.6 and 9.2 km. In contrast, the density of auklets was high in the coastal Soya Warm Current Water, where the acoustically determined fish biomass was large, and showed a positive relationship with the fish biomass especially in the lower layer (29–104 m depth) at any spatial scale. This species-specific difference in response to prey biomass might be related to prey-searching behaviors; i.e., rhinoceros auklets search prey underwater visually, but short-tailed shearwater can use both visual and olfactory cues to locate zooplankton patches from the air.
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DOI：
10.1016/j.dsr2.2020.104898
发表时间：
2020
期刊：
Deep Sea Research Part II: Topical Studies in Oceanography
影响因子：
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作者：
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作者：
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DOI：
10.3838/jjo.60.216
发表时间：
2011
期刊：
Japanese Journal of Ornithology
影响因子：
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作者：
倉沢康大;本田聡;綿貫豊
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影响因子：
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作者：
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DOI：
--
发表时间：
2008
期刊：
Deep-Sea Research II 55
影响因子：
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作者：
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