Feeding Habits of Mixed Cyprinid Species in a Chinese Integrated Fish Culture Pond: Change in Planktivorous Density Induces Feeding Changes in Planktivorous Carps.
スポンサーリンク
概要
- 論文の詳細を見る
Gut contents of six cultured cyprinid species were sampled and their chlorophyll and chlorophyll derivatives were measured to quantify fish feeding in a Chinese integrated fish culture pond. The densities of planktivorous (silver and bighead carp) and benthic-feeding (crucian and common carp) fish fry stocked in the pond were only 12% and 43%, respectively, of those in our previous pond study (TAKAMURA et al., 1993). High ratios of chl.b/chl.a or phaeophorbide a/chl.a were good indicators of the dependence on aquatic plants of herbivory or zooplanktivory, respectively. Phaeophytin a seemed to be a good index of herbivory on decomposing aquatic plants. Grass carp and blunt snout bream fed mostly on aquatic plants. The feeding habits of silver and bighead carp were very similar. These two planktivorous fish ingested zooplankton, phytoplankton and plant fragments derived from faeces of grass-eating carps. Silver carp were more dependent on zooplankton and bighead carp were less dependent on plant fragments in this pond as compared with those from the pond in our previous study (TAKAMURA et al., 1993). Common carp were largely dependent on plant fragments. Crucian carp utilized both plant fragments and zooplankton. The feeding habits of benthic carps did not differ from those in our previous pond study. Regardless of some changes in the feeding habits of planktivorous carps, both planktivorous and benthic-feeding cyprinids reared in this pond seemed to be supported by plant fragments, and were probably nourished by microorganisms attached to those plant fragments (IWATA et al., 1992).
- 日本陸水学会の論文
日本陸水学会 | 論文
- キイロカワカゲロウの孵化におよぼす水温の影響〔英文〕
- キイロカワカゲロウ羽化の経日・日周変化〔英文〕
- Studies on Taxonomy and Distribution of the Freshwater Snails,Genus,Semisulcospia in the Three Islands inside Lake Biwa
- びわ湖南湖におけるタテヒダカワニナおよびカゴメカワニナの分布とその決定要因について
- ちりとり型金綱による河川底生動物採集上の問題点