Movement patterns for a critically endangered species, the leatherback turtle (Dermochelys coriacea), linked to foraging success and population status.
Movement patterns for a critically endangered species, the leatherback turtle (Dermochelys coriacea), linked to foraging success and population status.
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DOI：
10.1371/journal.pone.0036401
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Hays GC
中科院分区：
文献类型：
--
作者：
Bailey H;Fossette S;Bograd SJ;Shillinger GL;Swithenbank AM;Georges JY;Gaspar P;Strömberg KH;Paladino FV;Spotila JR;Block BA;Hays GC
浮游脊椎动物觅食的成功可能会揭示水平和垂直运动模式。我们显示出显着不同的模式，棱皮龟在北大西洋与东太平洋，它的食物凝胶状浮游动物，只是偶尔发现在高密度。在大西洋，旅行速度的特点是两种模式，表明高觅食成功率在低速（<15公里d-1）和过境在高速（20-45公里d-1）。在太平洋只有一个明显的模态，出现在21 km d-1的速度上，表明过境。平均潜水深度的变化与纬度有关，但更接近北大西洋的温跃层和营养层的平均年深度比东太平洋海龟。对这些发现最简单的解释是，东太平洋海龟很少能取得很高的觅食成功率。这是第一次支持觅食行为的差异，这种极度濒危物种的种群，并表明，较长时间寻找猎物可能会阻碍人口恢复在太平洋，而在大西洋的人口维持。
Foraging success for pelagic vertebrates may be revealed by horizontal and vertical movement patterns. We show markedly different patterns for leatherback turtles in the North Atlantic versus Eastern Pacific, which feed on gelatinous zooplankton that are only occasionally found in high densities. In the Atlantic, travel speed was characterized by two modes, indicative of high foraging success at low speeds (<15 km d−1) and transit at high speeds (20–45 km d−1). Only a single mode was evident in the Pacific, which occurred at speeds of 21 km d−1 indicative of transit. The mean dive depth was more variable in relation to latitude but closer to the mean annual depth of the thermocline and nutricline for North Atlantic than Eastern Pacific turtles. The most parsimonious explanation for these findings is that Eastern Pacific turtles rarely achieve high foraging success. This is the first support for foraging behaviour differences between populations of this critically endangered species and suggests that longer periods searching for prey may be hindering population recovery in the Pacific while aiding population maintenance in the Atlantic.
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影响因子：
3.1
作者：
Avens, Larisa;Taylor, J. Christopher;Hastings, Mervin
通讯作者：
Hastings, Mervin
影响因子：
2
作者：
Croll, D. A.;Demer, D. A.;Tershy, B. R.
通讯作者：
Tershy, B. R.
DOI：
10.1016/j.jembe.2006.03.013
发表时间：
2006-08-08
影响因子：
2
作者：
James, Michael C.;Davenport, John;Hays, Graeme C.
通讯作者：
Hays, Graeme C.
影响因子：
2.8
作者：
Fossette, Sabrina;Hobson, Victoria J.;Hays, Graeme C.
通讯作者：
Hays, Graeme C.
影响因子：
2.5
作者：
Jonsen, Ian D.;Myers, Ransom A.;James, Michael C.
通讯作者：
James, Michael C.