| 词汇 | stickleback |
| 释义 | stickleback noun[ C ] uk /ˈstɪk.əl.bæk/ us /ˈstɪk.əl.bæk/ a small fish that has sharp points along its back刺鱼 Frank Greenaway/ Dorling Kindersley/GettyImages Sea fish albacore American shad anchovy barracuda beluga eel elver flatfish flathead flounder orange roughy Pacific salmon pilchard pink salmon plaice sockeye salmon sprat stingray stonefish striped bass You can also find related words, phrases, and synonyms in the topics: Freshwater fish Examples of sticklebackstickleback Gammarids were additionally collected with a long hand net at several known stickleback breeding grounds. The sampling places of the copepods and infected sticklebacks were about 80 km apart. Survival is essential for transmission to the stickleback host, which only feeds on live copepods. The parasite uses the stickleback as an intermediate host between copepods and the final host, piscivorous birds. Other studies examining growth in experimentally infected sticklebacks have not provided standardized rations, making comparison with the present study difficult. The sampling places of the copepods and infected sticklebacks were about 2 km apart and the two water bodies were connected. This facilitates predation by the subsequent host, the three-spined stickleback. One singly infected copepod was fed to each of 30 of the selected sticklebacks and the remaining fish (sham-exposed controls) were fed parasite-free copepods. However, neither of these studies was designed to examine the effect of a standard ration on growth patterns of stickleback hosts and their plerocercoids. Each juvenile stickleback was simultaneously exposed to 2 experimentally infected copepods, one harbouring outcrossed the other selfed parasites. Predation risk affects courtship and attractiveness of competing threespine stickleback males. Patients are emotional kin to chimps and sticklebacks, and beneficiaries of the spandrels of anger in service of social co-operation. The parasite has a complex life-cycle involving a cyclopoid copepod (first intermediate host) and the three-spined stickleback (second intermediate host). Parasite surfaces were compared in worms derived from different sibships that were bred in the laboratory from parents obtained from a naturally infected population of stickleback hosts. Indirect fitness consequences of mate choice in sticklebacks : offspring of brighter males grow slowly but resist parasite infections. 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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