Trophic status drives interannual variability in nesting numbers of marine turtles
Trophic status drives interannual variability in nesting numbers of marine turtles
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DOI：
10.1098/rspb.2001.1695
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发表时间：
2001-07-22
影响因子：
4.7
通讯作者：
Hays, GC
中科院分区：
文献类型：
--
作者：
Broderick, AC;Godley, BJ;Hays, GC
大的年度波动：在许多非一年生繁殖者种群的繁殖数量中可以看到。研究了绿色海龟（Chelonia mydas）（n = 16个种群）、红海龟（Caretta caretta）（n = 10个种群）、棱皮龟（Dermochelys coriacea）（n = 9个种群）和玳瑁龟（Eretmochelys imbricata）（n = 10个种群）的筑巢数量的年际变化。绿色龟的年际变化最大。当比较在塞浦路斯筑巢的绿色海龟和红海龟时，我们发现绿色海龟更有可能改变产卵季节之间的间隔，并且在一个季节中产卵的数量上表现出更大的变化。我们认为，这些差异是由不同物种的不同营养状态驱动的。绿色海龟是草食性的，以海草和大型藻类为食，这种初级生产将比红海龟的肉食性饮食更紧密地与当时的环境条件联系在一起。
Large annual fluctuations: are seen in breeding numbers in many populations of non-annual breeders. We examined the interannual variation in nesting numbers of populations of green (Chelonia mydas) (n = 16 populations), loggerhead (Caretta caretta) (n = 10 populations), leatherback (Dermochelys coriacea) (n = 9 populations) and hawksbill turtles (Eretmochelys imbricata) (n = 10 populations). Interannual variation was greatest in the green turtle. When comparing green and loggerhead turtles nesting in Cyprus we found that green turtles were more likely to change the interval between laying seasons and showed greater variation ill the number of clutches laid in a season. We suggest that these differences are driven by the varying trophic statuses of the different species. Green turtles are herbivorous, feeding on sea grasses and macro-algae, and this primary production will be more tightly coupled with prevailing environmental conditions than the carnivorous diet of the loggerhead turtle.