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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Habitat simplification affects nuclear-follower foraging association among stream fishes

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Author(s):
Teresa, Fabricio Barreto [1] ; Romero, Renato de Mei [1] ; Casatti, Lilian [1] ; Sabino, Jose [2]
Total Authors: 4
Affiliation:
[1] UNESP Univ Estadual Paulista, Lab Ictiol, Dept Zool & Bot, IBILCE, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
[2] Univ Anhanguera Uniderp, Lab Biodiversidade & Conservacao Ecossistemas Aqu, BR-79003010 Campo Grande, MS - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Neotropical Ichthyology; v. 9, n. 1, p. 121-126, JAN-MAR 2011.
Web of Science Citations: 9
Abstract

Nuclear-follower interaction is a particular kind of interspecific foraging association that includes a nuclear species, which dig in or inspect the bottom, and follower species, which access the food items made available by the nuclear. In this study we examined the effect of habitat structure on nuclear-follower relationship in a stream of Bodoquena Plateau, Central-West Brazil. Foraging associations were registered while snorkeling in 24 observation sessions, totaling six hours in unaltered and altered sites. Overall, 272 nuclear-follower associations were registered, having four species acting as nuclear and seven as followers. The dominant nuclear species were different in each site. Prochilodus lineatus was the main nuclear species in the altered site and Leporinus macrocephalus in the unaltered site. The richness of follower species was similar between sites, however, follower species abundance per interaction were significantly higher in the unaltered site than in the altered site. These differences seem to be a consequence of the alterations in assemblage composition and feeding behavior of the nuclear species that presumably are affected by different substrate composition and food availability between the structurally distinct areas. (AU)

FAPESP's process: 07/05400-6 - Stream fishes in Cerrado areas: composition, structure and conservation
Grantee:Renato de Mei Romero
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 08/03583-9 - Composition and functional diversity of stream fish assemblages
Grantee:Fabrício Barreto Teresa
Support Opportunities: Scholarships in Brazil - Doctorate