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Diet and niche breadth and overlap in fish communities within the area affected by an Amazonian reservoir (Amapá, Brazil).
An Acad Bras Cienc 2014; 86(1):383-405AA

Abstract

We investigated the niche breadth and overlap of the fish species occurring in four environments affected by the Coaracy Nunes reservoir, in the Amapá Brazilian State. Seasonal samples of fishes were taken using a standard configuration of gillnets, as well as dragnets, lines, and cast-nets. Five hundred and forty stomach contents, representing 47 fish species were analyzed and quantified. Niche breadth and overlap were estimated using indexes of Levins and Pianka, respectively, while interspecific competition was evaluated using a null model (RA3). ANOVA and the Kruskal-Wallis test were used, respectively, to evaluate differences in niche breadth and overlap between areas. The data indicate that the majority of the fish species belong to the piscivore, omnivore, and detritivore guilds. These species have likely colonized the environments due to the availability of suitable feeding resources, and the favorable physical conditions created by the river damming. Overall, few species have ample niches, but most of them are highly specialized. Resources seasonal variation had little effect on the feeding behavior of most species in the study areas. The null models indicated that competition was not a factor determining on community structure.

Authors+Show Affiliations

Laboratorio de Limnologia e Ictiologia, Universidade Federal do Amapa/ UNIFAP, Campus Universitario Marco Zero do Equador, Macapa, AP, Brasil.Departamento de Engenharia Civil, Universidade Federal do Rio Grande do Norte/ UFRN, BR 101, Campus Universitario, Natal, RN, Brasil.Laboratorio de Biologia Pesqueira, Universidade Federal do Para/ UFPA, Campus Guama, Belem, PA, Brasil.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24676175

Citation

Sá-Oliveira, Julio C., et al. "Diet and Niche Breadth and Overlap in Fish Communities Within the Area Affected By an Amazonian Reservoir (Amapá, Brazil)." Anais Da Academia Brasileira De Ciencias, vol. 86, no. 1, 2014, pp. 383-405.
Sá-Oliveira JC, Angelini R, Isaac-Nahum VJ. Diet and niche breadth and overlap in fish communities within the area affected by an Amazonian reservoir (Amapá, Brazil). An Acad Bras Cienc. 2014;86(1):383-405.
Sá-Oliveira, J. C., Angelini, R., & Isaac-Nahum, V. J. (2014). Diet and niche breadth and overlap in fish communities within the area affected by an Amazonian reservoir (Amapá, Brazil). Anais Da Academia Brasileira De Ciencias, 86(1), pp. 383-405. doi:10.1590/0001-3765201420130053.
Sá-Oliveira JC, Angelini R, Isaac-Nahum VJ. Diet and Niche Breadth and Overlap in Fish Communities Within the Area Affected By an Amazonian Reservoir (Amapá, Brazil). An Acad Bras Cienc. 2014;86(1):383-405. PubMed PMID: 24676175.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Diet and niche breadth and overlap in fish communities within the area affected by an Amazonian reservoir (Amapá, Brazil). AU - Sá-Oliveira,Julio C, AU - Angelini,Ronaldo, AU - Isaac-Nahum,Victoria J, Y1 - 2013/12/01/ PY - 2013/02/13/received PY - 2013/07/05/accepted PY - 2014/3/29/entrez PY - 2014/3/29/pubmed PY - 2014/7/8/medline SP - 383 EP - 405 JF - Anais da Academia Brasileira de Ciencias JO - An. Acad. Bras. Cienc. VL - 86 IS - 1 N2 - We investigated the niche breadth and overlap of the fish species occurring in four environments affected by the Coaracy Nunes reservoir, in the Amapá Brazilian State. Seasonal samples of fishes were taken using a standard configuration of gillnets, as well as dragnets, lines, and cast-nets. Five hundred and forty stomach contents, representing 47 fish species were analyzed and quantified. Niche breadth and overlap were estimated using indexes of Levins and Pianka, respectively, while interspecific competition was evaluated using a null model (RA3). ANOVA and the Kruskal-Wallis test were used, respectively, to evaluate differences in niche breadth and overlap between areas. The data indicate that the majority of the fish species belong to the piscivore, omnivore, and detritivore guilds. These species have likely colonized the environments due to the availability of suitable feeding resources, and the favorable physical conditions created by the river damming. Overall, few species have ample niches, but most of them are highly specialized. Resources seasonal variation had little effect on the feeding behavior of most species in the study areas. The null models indicated that competition was not a factor determining on community structure. SN - 1678-2690 UR - https://www.unboundmedicine.com/medline/citation/24676175/Diet_and_niche_breadth_and_overlap_in_fish_communities_within_the_area_affected_by_an_Amazonian_reservoir__Amapá_Brazil__ L2 - http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100383&lng=en&nrm=iso&tlng=en DB - PRIME DP - Unbound Medicine ER -