The contribution of isopods in the feeding of Sympterygia spp (Pisces: Rajidae) with a description of Ancinus gaucho sp. n. (Isopoda: Sphaeromatidae)

Pires, Ana Maria Setubal

doi:10.1590/S0373-55241987000200002

Abstract

The present paper deals with the isopods present in the stomach content of Sympterygia acuta and S. bonapartei, two species of Rajidae frequently found along Rio Grande do Sul coast. Eight species of isopods were found in the stomachs analysed, and Ancinus gaucho sp.n. showed to be an important food resource for the fishes, especially for S. bonapartei. The difference found in the diet composition of both species of skates seems to reflect a non selective feeding of the fishes on distinct benthic communities. The description of Ancinus gaucho is also furnished herein as well as a key to the known species of the genus.

Stomach content; New species; Taxonomy; Identification keys; Ancínus gaucho; Isopoda; Rajidae; Rio Grande do Sul; Brazil

ARTIGOS

The contribution of isopods in the feeding of Sympterygia spp (Pisces: Rajidae) with a description of Ancinus gaucho sp. n. (Isopoda: Sphaeromatidae)

Ana Maria Setubal Pires

Instituto Oceanográfico da Universidade de São Paulo (Caixa Postal 9075, 01051 São Paulo, SP)

ABSTRACT

The present paper deals with the isopods present in the stomach content of Sympterygia acuta and S. bonapartei, two species of Rajidae frequently found along Rio Grande do Sul coast. Eight species of isopods were found in the stomachs analysed, and Ancinus gaucho sp.n. showed to be an important food resource for the fishes, especially for S. bonapartei. The difference found in the diet composition of both species of skates seems to reflect a non selective feeding of the fishes on distinct benthic communities. The description of Ancinus gaucho is also furnished herein as well as a key to the known species of the genus.

Descriptors: Stomach content, New species, Taxonomy, Identification keys, Ancínus gaucho, Isopoda, Rajidae, Rio Grande do Sul, Brazil.

Descritores: Conteúdo estomacal, Espécie nova, Taxonomia, Chaves de identificação, Ancínus gaucho, Isopoda, Rajidae, Rio Grande do Sul, Brasil.

Full text available only in PDF format.

Texto completo disponível apenas em PDF.

(Received 16-Sep-1987; accepted 14-Dec-1987)

BACESCU, M. & QUEIROZ, E. L. de 1985. The contribution of Cumacea in the feeding of the Rajidae Sympterygia acuta and S. bonapartei from Rio Grande do Sul - S. Brazil. Trav. Mus. Hist. nat. "Gr. Antipa", 27:7-18.
CAPAPÉ, C. 1975. Contribution à la biologie des Rajidae des côtes tunisiennes. IV. Raja clavata: regime alimentaire. Annls Inst. Michel Pacha, 8:16-32.
______ 1977. Contribution à la biologie des Rajidae des côtes tunisiennes. 6. Raja asterias Delaroche, 1809. Regime alimentaire. Bull. Inst. natn. scient, tech. Océanogr, Pêche Salammbô, 4(2-4): 319-332.
GLYNN, P. W. & GLYNN, C. S. 1974. On the systematics of Ancinus (Isopoda, Sphaeromatidae), with the description of a new species from the tropical eastern Pacific. Pacific Sci., 28(4):401-422.
HOLDEN, M. J. & TUCKER, R. N. 1974. The food of Raja clavata Linnaeus 1758, Raja montagui Fowler 1810, Raja naevus Muller et Henle 1841 and Raja brachyura Lafont 1873 in British waters. J. Cons. perm. int. Explor. Mer, 35(2): 189-193.
IVERSON, E. W. 1982. Revision of the isopod family Sphaeromatidae (Crustacea: Isopoda: Flabellifera) I. Subfamily names with diagnoses and key. J. crustacean Biol., 2(2):248-254.
KENSLEY, B. & SCHOTTE, M. 1987. New records of isopod Crustacea from the Caribbean, the Florida Keys, and the Bahamas. Proc. biol. Soc. Wash., 100(1):216-247.
QUEIROZ, E. L. de 1986. Estudo comparativo da alimentação de Sympterygya acuta Garman, 1877 e S. bonapartei Muller & Henle, 1841 (Pisces: Rajiformes) com relação a: distribuição, abundância, morfologia e reprodução nas águas litorâneas do Rio Grande do Sul - Brasil. Dissertação de mestrado. Universidade do Rio Grande, RS. 137p. + 2 ann. (unpublished).

Publication Dates

Publication in this collection
24 May 2012
Date of issue
1987

History

Received
16 Sept 1987
Accepted
14 Dec 1987

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

[1] BACESCU, M. & QUEIROZ, E. L. de 1985. The contribution of Cumacea in the feeding of the Rajidae Sympterygia acuta and S. bonapartei from Rio Grande do Sul - S. Brazil. Trav. Mus. Hist. nat. "Gr. Antipa", 27:7-18.

[2] CAPAPÉ, C. 1975. Contribution à la biologie des Rajidae des côtes tunisiennes. IV. Raja clavata: regime alimentaire. Annls Inst. Michel Pacha, 8:16-32.

[3] ______ 1977. Contribution à la biologie des Rajidae des côtes tunisiennes. 6. Raja asterias Delaroche, 1809. Regime alimentaire. Bull. Inst. natn. scient, tech. Océanogr, Pêche Salammbô, 4(2-4): 319-332.

[4] GLYNN, P. W. & GLYNN, C. S. 1974. On the systematics of Ancinus (Isopoda, Sphaeromatidae), with the description of a new species from the tropical eastern Pacific. Pacific Sci., 28(4):401-422.

[5] HOLDEN, M. J. & TUCKER, R. N. 1974. The food of Raja clavata Linnaeus 1758, Raja montagui Fowler 1810, Raja naevus Muller et Henle 1841 and Raja brachyura Lafont 1873 in British waters. J. Cons. perm. int. Explor. Mer, 35(2): 189-193.

[6] IVERSON, E. W. 1982. Revision of the isopod family Sphaeromatidae (Crustacea: Isopoda: Flabellifera) I. Subfamily names with diagnoses and key. J. crustacean Biol., 2(2):248-254.

[7] KENSLEY, B. & SCHOTTE, M. 1987. New records of isopod Crustacea from the Caribbean, the Florida Keys, and the Bahamas. Proc. biol. Soc. Wash., 100(1):216-247.

[8] QUEIROZ, E. L. de 1986. Estudo comparativo da alimentação de Sympterygya acuta Garman, 1877 e S. bonapartei Muller & Henle, 1841 (Pisces: Rajiformes) com relação a: distribuição, abundância, morfologia e reprodução nas águas litorâneas do Rio Grande do Sul - Brasil. Dissertação de mestrado. Universidade do Rio Grande, RS. 137p. + 2 ann. (unpublished).