DYNAMICS OF THE PLATYHELMINTH FAUNA OF WOOD DUCKS IN RELATION TO FOOD-HABITS AND REPRODUCTIVE STATE
DYNAMICS OF THE PLATYHELMINTH FAUNA OF WOOD DUCKS IN RELATION TO FOOD-HABITS AND REPRODUCTIVE STATE
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DOI：
10.2307/3281239
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发表时间：
1983-01-01
影响因子：
1.3
通讯作者：
FREDRICKSON, LH
中科院分区：
文献类型：
--
作者：
DROBNEY, RD;TRAIN, CT;FREDRICKSON, LH
本文报道了林鸭肠道蠕虫区系的动态。sponsa）和鸟类生殖周期中食物习惯变化与蠕虫种群之间的关系进行了研究。共检出蠕虫11种，其中吸虫4种[Notocotylus attenuatus，Echinoparyphium recurvatum，Zygocotyle lunata，Echinostoma revolutum]，绦虫7种[Diplomis bulbodes，Dicranotaenia sp.，Nadejdolepis sp.，Fimbriaria fasciolaris，Sobolevicanthus sp.，小棘鲷属，从155只柴鸭的消化道中分离到[膜壳绦虫亚科]绦虫。除一种外，所有物种都在两性中发现。寄生虫数量的季节（春季与秋季），性别和阶段的生殖周期的显着差异。蠕虫感染在两种性别是在春季比秋季求偶，季节性差异的幅度是相当大的女性。在春季，女性比男性含有更多的蠕虫，但在秋季没有检测到性别相关的差异。寄生虫数量的季节性变化和性别相关的差异密切对应的消费无脊椎动物作为中间宿主。在秋季求偶和产卵前，雌性体内寄生虫的平均数量相似，这表明在冬季很少或没有发生新的感染。最密集的感染被发现在产蛋女性，并归因于食欲过旺，并在鸡蛋生产过程中增加无脊椎动物消费。在孵化和秋季求爱之间的女性寄生虫数量大幅减少表明，大多数蠕虫获得奠定女性在夏季丢失，长期影响的感染增加可能是可以忽略不计的。
The dynamics of the intestinal helminth fauna of wood ducks (A. sponsa) and the relationship between changes in food habits and helminth populations during the bird''s reproductive cycle were studied in southeast Missouri [USA]. A total of 11 species of helminths, comprising 4 species of trematodes [Notocotylus attenuatus, Echinoparyphium recurvatum, Zygocotyle lunata, Echinostoma revolutum] and 7 species of cestodes [Diorchis bulbodes, Dicranotaenia sp., Nadejdolepis sp., Fimbriaria fasciolaris, Sobolevicanthus sp., Microsomacanthus sp., Hymenolepidinae, unidentified cestode] were recovered from the digestive tracts of 155 wood ducks. All species except one were found in both sexes. Significant differences were found in parasite numbers by season (spring vs. fall), sex, and stage of the reproductive cycle. Helminth infection in both sexes was higher in the spring than during fall courtship; the magnitude of the seasonal difference was considerably greater in females. Females contained significantly more helminths than males during spring, but no sex-related differences were detected in the fall. Seasonal changes and sex-related differences in parasite numbers corresponded closely with the consumption of invertebrates that serve as intermediate hosts. The average number of parasites in females was similar during fall courtship and pre-egg-laying, suggesting that little or no new infection occurred during winter. The most intensive infections were found in laying females and were attributed to hyperphagia and increased invertebrate consumption during egg production. A large decrease in the parasite numbers in females between incubation and fall courtship indicated that most of the helminths acquired by laying females were lost during summer; the long-term effects of the increased infection are probably negligible.