| 词汇 | cockle |
| 释义 | cockle noun[ C ] uk /ˈkɒk.əl/ us /ˈkɑː.kəl/ a small, rounded sea creature with a shell, common in Europe. Cockles can be cooked and eaten.鸟蛤，海扇 nortongo/iStock/Getty Images Plus/GettyImages Sea creatures abalone amphipod anemone barnacle barrier reef crab cray crayfish crustacean cuttlefish lobster marron mollusc mussel octopus shipworm shrimp snow crab soft-shell clam squid Many oyster and cockle shells were on its shore. Examples of cocklecockle Thus, the direct impact of the two trematode species on their cockle hosts has cascading effects extending to the entire intertidal community. Secondly, the otherwise smooth mudflat surface will have greater heterogeneity, with surface-stranded cockles providing refuges and attachment substrate for other organisms. In concert, these interactions may cause the foot of heavily infected cockles to be literally immobilized. We compared the relative distribution of the two echinostome species among different locations in the foot and in the rest of the cockle. Results indicate that these two species are ecological equivalents, and their combined numbers determine how the cockle population is affected. The data are from three cockles per site; total numbers of metacercariae of both species are given in the figure. Several epibiotic, or fouling, organisms use cockle shells as attachment substrates and even compete for space in areas where they are abundant. The final hosts are oystercatchers that feed on the cockles during low tide. The following day it was confirmed that all cockles had burrowed and were filtering. Below : outline of cockle foot showing the approximate footsection boarders and metacercariae ($). This is not what we would expect if there were only one species infecting cockles. However, a small foot will by no means make burrowing easier for the cockles. This seemingly minor effect on cockle hosts has several major repercussions on the entire intertidal community. Mudflats are also used as culture beds for cockles. This suggests that mortality may be very high in young cockles. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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