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• Bol. Inst. Oceanogr. 26 (2) • 1977 • https://doi.org/10.1590/S0373-55241977000200007   copy

Occurrence and ecological notes on Rocinela signata (Isopoda, Flabellifera) off Brazil

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstracts

This paper discuss the vertical and horizontal distribution of the marine isopod Rocinela signata Schiödte & Meinert, 1879, along Brazil. Published records and new data gathered in recent years were used. The species, widely distributed along Brazil, has its most southern limit of occurrence considerably extended to off State of Santa Catarina (27º08'S, 48º11'W) . It is typically a shelf species. So far it was recorded off Brazil at a maximum depth of 73 m, while particularly in southern Brazil at 53 m. The species has been collected free living on the bottom or as a fish parasite, and a few times has been reported attacking and sucking swimmers. Available data suggest any host specificity. R. signata seems a facultative and not an obligate fish parasite.

O presente trabalho discute especialmente a distribuição vertical e horizontal do isópode marinho Rocineta signata Schiödte & Meinert, 1879, ao longo do Brasil. Utilizou-se, para tanto, de dados publicados e outros originais, estes obtidos nos últimos anos. A espécie apresenta ampla distribuição ao largo do Brasil, sendo sua ocorrência mais meridional ampliada ate o Estado de Santa Catarina (27º08'S, 48º11'W). A espécie é típica de plataforma continental, tendo sido registrada ao longo do Brasil, até o presente, a uma profundidade máxima de 73 m, porém na região centro-sul a 53 m. R. signata tem sido coletada livremente sobre o substrato ou como ectoparasita de peixes, e algumas vezes atacando e sugando o sangue de banhistas. Dados publicados indicam nao haver especificidade de hospedeiro. A espécie pode ser considerada como um parasita facultativo e nao como um parasita obrigatório de peixes.

Occurrence and ecological notes on Rocinela signata (Isopoda, Flabellifera) off Brazil

Plínio Soares Moreira

Instituto Oceanográfico da Universidade de São Paulo

SYNOPSIS

This paper discuss the vertical and horizontal distribution of the marine isopod Rocinela signata Schiödte & Meinert, 1879, along Brazil. Published records and new data gathered in recent years were used. The species, widely distributed along Brazil, has its most southern limit of occurrence considerably extended to off State of Santa Catarina (27º08'S, 48º11'W) . It is typically a shelf species. So far it was recorded off Brazil at a maximum depth of 73 m, while particularly in southern Brazil at 53 m. The species has been collected free living on the bottom or as a fish parasite, and a few times has been reported attacking and sucking swimmers. Available data suggest any host specificity. R. signata seems a facultative and not an obligate fish parasite.

RESUMO

O presente trabalho discute especialmente a distribuição vertical e horizontal do isópode marinho Rocineta signata Schiödte & Meinert, 1879, ao longo do Brasil. Utilizou-se, para tanto, de dados publicados e outros originais, estes obtidos nos últimos anos. A espécie apresenta ampla distribuição ao largo do Brasil, sendo sua ocorrência mais meridional ampliada ate o Estado de Santa Catarina (27º08'S, 48º11'W). A espécie é típica de plataforma continental, tendo sido registrada ao longo do Brasil, até o presente, a uma profundidade máxima de 73 m, porém na região centro-sul a 53 m. R. signata tem sido coletada livremente sobre o substrato ou como ectoparasita de peixes, e algumas vezes atacando e sugando o sangue de banhistas. Dados publicados indicam nao haver especificidade de hospedeiro. A espécie pode ser considerada como um parasita facultativo e nao como um parasita obrigatório de peixes.

Full text available only in PDF format.

Texto completo disponível apenas em PDF.

ACKNOWLEDGEMENTS

The author thanks all colleagues and friends which provided part of the material studied, namely, Drs. E. Nonato, Luiz R. Tommasi and H. Nomura, M. Sc. José Carlos de Freitas, Messrs. Clarimundo de Jesus, M. Furuya and Roberto Galvão.

MATERIAL EXAMINED

STATE OF MARANHÃO

1. São Luiz. Praia da Ponta da Areia. January/1971. José Carlos de Freitas leg. Specimens gathered attached to the collector's legs during a beach trip; the removal of the parasite caused bleeding. 2 young females 6.5 and 10.8 mm long without oostegites, and gut filled with a dark-reddish mass of ingested blood.

STATE OF CEARA

2. Fortaleza. May/1965. H. Nomura leg. On the gills of "cioba" (Lutjanus analis). 2 young females 11.2 mm long without oostegites, and gut filled with a large reddish mass of ingested blood.

STATE OF BAHIA

3. Enseada de Camamu, about 13º53'S, 39º01'W. August/1973. 6 m depth. Roberto Galvao leg. Amongst fishes and crabs. 1 young female 11.1mm long deprived of both oostegites, and mass of ingested blood.

STATE OF ESPIRITO SANTO

4. Off Rio São Mateus. 18º31.2'S, 39º41.8'W. July/1972. 24.53ºC. 36.10 Sº /oo . 14 m depth. Oc/S "Prof. W. Besnard". van Veen 1/10. P. S. Moreira col. 1 juvenile 6.0 mm long with developing pereopod VII, and gut without mass of ingested blood.

5. Off Rio Santa Cruz. 19º59'S, 39º56TW. July/1972. 21 .62ºC 36 .57 Sº /oo. 4.13 ml/02. 41 m depth. Oc/S "Prof. W. Besnard". van Veen 1/10. P. S. Moreira col. 1 juvenile 3.2 mm long deprived of pereopod VII, and gut without mass of ingested blood.

6. Ilha da Trindade, far off Brazilian coast, about 20º30'S, 29º30'W. May/ 1950. 40 m depth. Otter-trawl. Wladimir Besnard leg. Amongst fishes and crabs. 1 adult female 15.1 mm long without oostegites, and gut filled with a reddish mass of ingested blood.

STATE OF RIO DE JANEIRO

7. Off Cabo de São Tomé. 21º46'S, 40º56'W. November/1970. 16 m depth. Oc/S "Prof. W. Besnard". Bearn-trawl. P. S. Moreira col. MBT series. 1 young female 12.8 mm long without oostegites and mass of ingested blood.

8. Off Cabo de Sao Tome. 21º46'S, 40º58'W. November/1970. 20.03ºC. 36 .20 Sº /oo. 15 m depth. Oc/S "Prof. W. Besnard". MBT dredge. P. S. Moreira col. MBT series. 1 young female 7.8 mm long without both oostegites, and mass of ingested blood.

9. Off Baía de Guanabara. 23º02'S, 43º00'W. November/1970. 15.55ºC. 35.68 Sº /oo. 4.89 ml/O2. 40 m depth. Oc/S "Prof.W. Besnard". MBT dredge. P. S. Moreira col. MBT series. 1 young female 8.1 mm long without both oostegites, and reddish mass of ingested blood.

10. Off Ilha Grande. 23º14'S, 44º03'W. June/1971 . 52 m depth. Oc/S "Prof. W. Besnard". MBT dredge. P. S . Moreira col. MBT series. 1 young female 7 .5 mm long without both oostegites, and mass of ingested blood.

11. Off Ilha de Itacurussá, about 22º58'S, 43º55'W. July/1966. 22.54ºC. 33.60 Sº /oo. 25m depth. R/V "Emília". Rectangular dredge. Luiz R. Tommasi leg. 1 adult female 13.1 mm long without oostegites, and gut filled with a large reddish mass of ingested blood.

12. Off Ilha de Marambaia, about 22º59'45"S, 43º59'W. March/1969. 26.70ºC. 33.40 Sº /oo. 9 m depth. R/V "Emilia". Rectangular dredge. Luiz R. Tommasi leg. 1 juvenile 6.3mm long with developing pereopod VII, and gut without mass of ingested blood.

13. Off Ilha Guaiba, about 23º00'15"S, 44º01'30"W. June/1967. 22.10ºC. 34.22 Sº /oo. 10 m depth. R/V "Emilia", van Veen 1/10. Luiz R. Tommasi leg. 1 ovigerous female 13.0 mm long.

14. Off Ilha de Marambáia, about 23º01'30"S, 43º59'W. March/1969. 26.10ºC. 32.80 Sº /oo. lOmdepth. R/V "Emilia". Rectangular dredge. Luiz R. Tommasi leg. l ovigerous female 13.0 mm long.

15. Baía de Marambaía, about 23º02'S, 43º57'W. December/1970. 7 m depth. R/V "Emilia", van Veen 1/10. Luiz R. Tommasi leg. 1 young female 6.1 mm long without both oostegites, and reddish mass of ingested blood.

16. Ilha Grande. Off Ponta Grossa, about 23º05'S, 44º03'W. February/1968. 20 m depth. Oc/S "Prof. W. Besnard". Photograb. Clarimundo de Jesus leg. 1 fragment of the posterior part of the body of an adult female.

STATE OF SÃO PAULO

17. Ubatuba. Enseada do Flamengo, praia do Lamberto, at the pier of Base Norte (23º30'S, 45º07'W) of the Instituto Oceanográfico, USP. Octuber/ 1968. Superficial night plankton using a light as a lure. Local depth: 2m. E. Nonato leg. 1 young female 6.3 mm long without both oostegites, and mass of ingested blood; 1 juvenile 5.0 mm long deprived of pereopod VII, and gut without mass of ingested blood.

18. Off Ilha dos Alcatrazes. 24º03'S, 45º40'W. March/1969. 35 m depth. R/V "Emilia". Otter-trawl. P. S. Moreira col. 1 young male 11.5 mm long bearing developing copulatory process, and gut filled with a reddish mass of ingested blood.

19. Off Ponta da Jureia. 24º36'S, 47º07'W. June/1970. 16.65ºC. 35.67 Sº /oo. 21 m depth. Oc/S "Prof. W. Besnard". MBT dredge. P. S. Moreira col. MBT series. 1 young female 8.0 mm long without both oostegites, and mass of ingested blood in the gut.

20. Off Ilha do Bom Abrigo. 25º13'S, 47º29'W. June/1970. 32 m depth. Oc/s "Prof. W. Besnard". MBT dredge. P. S. Moreira col. MBT series. 1 young female 12.0 mm long without both oostegites, and mass of ingested blood in the gut.

STATE OF SANTA CATARINA

21. Off Ilha do Arvoredo. 27º08'S, 48º11'W. January/1957 . 50 m depth. Oc/S "Toko Maru". Otter-trawl. M. Furuya leg. On the gills of "cabrinha" (Prionotus sp.). 1 juvenile 6.5 mm long with developing pereopod VII, and gut filled with a reddish mass of ingested blood.

REFERENCES

COELHO, P. A. & KOENING, M. L. 1972. A distribuição dos crustáceos pertencentes às ordens Stomatopoda, Tanaidacea e Isopoda no Norte e Nordeste do Brasil. Trabhs Oceanogr. Univ. Fed. Pe., Recife, 13:245-260.

MENZIES, R. J. & GLYNN, P. W. 1968. The common marine isopod Crustacea of Puerto Rico. Stud. Fauna Curacao, 27:1-133.

MOREIRA, P. S. 1971. Sobre Rocinela signaba Schiödte & Meinert, 1879 (Isopoda, Flabellifera). Ciênc. Cult.,S Paulo, 23(suppl.):389.

______ 1972. Species of marine Isopoda (Crustacea, Peracarida) from southern Brazil. Bolm Inst, oceanogr., S Paulo, 21:163-179.

RICHARDSON, H. 1905. A monograph on the isopods of North America. Bull. U. S. natn. Mus., 54:i-xxv, 1-727.

SCHIÖDTE, J. C. & MEINERT, FR. 1879. Symbolae ad Monographiam Cymothoarum Crustaceoruin Isopodum Familiae. Naturh. Tidsskr., 12:321-415, pls. 7-13.

(Received July 21 , 1976)

  • COELHO, P. A. & KOENING, M. L. 1972. A distribuição dos crustáceos pertencentes às ordens Stomatopoda, Tanaidacea e Isopoda no Norte e Nordeste do Brasil. Trabhs Oceanogr. Univ. Fed. Pe., Recife, 13:245-260.
  • MOREIRA, P. S. 1971. Sobre Rocinela signaba Schiödte & Meinert, 1879 (Isopoda, Flabellifera). Ciênc. Cult.,S Paulo, 23(suppl.):389.
  • ______ 1972. Species of marine Isopoda (Crustacea, Peracarida) from southern Brazil. Bolm Inst, oceanogr., S Paulo, 21:163-179.
  • RICHARDSON, H. 1905. A monograph on the isopods of North America. Bull. U. S. natn. Mus., 54:i-xxv, 1-727.
  • SCHIÖDTE, J. C. & MEINERT, FR. 1879. Symbolae ad Monographiam Cymothoarum Crustaceoruin Isopodum Familiae. Naturh. Tidsskr., 12:321-415, pls. 7-13.

Publication Dates

  • Publication in this collection
    06 June 2012
  • Date of issue
    1977

History

  • Received
    21 July 1976
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