Feeding ecology of Pachyurus bonariensis (Perciformes, Sciaenidae) in two bays of the Pantanal, Mato Grosso State, Brazil

被引:10
|
作者
Fugi, Rosemara [1 ]
Hahn, Norma S. [1 ]
Novakowski, Gisele C. [1 ]
Balassa, Graziela C. [1 ]
机构
[1] Univ Estadual Maringa, Nupelia, BR-9020900 Maringa, Parana, Brazil
来源
IHERINGIA SERIE ZOOLOGIA | 2007年 / 97卷 / 03期
关键词
feeding; fishes; bays; Pantanal;
D O I
10.1590/S0073-47212007000300020
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Feeding ecology of Pachyurus bonariensis (Perciformes, Sciaenidae) in two bays of the Pantanal, Mato Grosso State, Brazil. Spatial, temporal and ontogenetic variations in the diet of Pachyurus bonoriensis Steindachner, 1879 were analyzed. Fishes were taken monthly from March 2000 to February 2001 and from August 2002 to February 2003 in the Chacorore and Sinha Mariana bays. Diet was determined analyzing 359 stomach contents. To express diet results, were used occurrence and volumetric methods. The individuals consumed expressive amount of Chironomidae and Ephemeroptera larvae, in both bays and periods (dry and wet). Ontogenetic analysis showed that small individuals (Standard length = 1.6 to 7.2 cm) ate mainly Chironomidae, whereas larger ones (Standard length = 13.0 to 18.6 cm) consumed mainly Ephemeroptera. Then it is possible to infer that P. bonariensis is benthic-feeding fish with specialized diet. This characteristic was attributed because its narrow niche breadth allied with position and form of its mouth adapted to feed on the bottom.
引用
收藏
页码:343 / 347
页数:5
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