Estimating digestion time in gelatinous predators: a methodological comparison with the scyphomedusa Aurelia aurita
Estimating digestion time in gelatinous predators: a methodological comparison with the scyphomedusa Aurelia aurita
复制标题
估计胶状捕食者的消化时间:与 scyphomedusa Aurelia aurita 的方法学比较
DOI:
10.1007/s00227-012-2134-z
复制
发表时间:
2012
期刊:
影响因子:
2.4
通讯作者:
FitzGeorge-Balfour T
中科院分区:
文献类型:
--
作者:
FitzGeorge-Balfour T
In order to quantify the trophic impact of gelatinous predators, digestion time estimates are commonly applied to counts of prey in the guts. Three primary approaches are used, the Manual-feeding, Natural-feeding and Steady-state methods; these differ in methodology and their underlying assumptions. The criteria used to define the end-point of digestion, and the resolution at which digestion progress is observed, also vary across studies. To understand the impact of such differences, we estimate digestion times of the scyphomedusaAurelia auritafed adult females of the copepodAcartia tonsausing these various approaches. We find ~fourfold differences which can be attributed to bias towards the slowest rates of digestion by some end-point criteria, and overestimation from low observation resolution. Artificial manipulation and the degree to which swimming and feeding behaviour are natural may also influence estimates. We provide recommendations for those quantifying digestion times ofAurelia auritamedusae and gelatinous predators.
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DOI:
10.1016/0077-7579(87)90021-4
发表时间:
1987
期刊:
Netherlands Journal of Sea Research
影响因子:
--
作者:
R. Larson
通讯作者:
R. Larson
影响因子:
2.1
作者:
S. Uye;H. Shimauchi
通讯作者:
S. Uye;H. Shimauchi
影响因子:
4.5
作者:
Costello, JH;Colin, SP
通讯作者:
Colin, SP
影响因子:
2.5
作者:
Decker, MB;Breitburg, DL;Purcell, JE
通讯作者:
Purcell, JE
影响因子:
2.2
作者:
Tan;H. Skjoldal;C. Hopkins;K. Erikstad;H. P. Leinaas
通讯作者:
H. P. Leinaas