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Integumental Structures in the Oral Field of Eurytemora Affinis and Acartia Tonsa (Copepoda, Calanoida) in Relation To Their Trophic Habits

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[Scanning electron microscopy (SEM) was used to study the morphology of the integumental structures in the oral field of the copepods Eurytemora affinis and Acartia tonsa. Structures observed in these two copepods were different in type, number, and location. E. affinis presented only structures of a filiform type, distributed all over the oral field, whereas in A. tonsa three different types of structures were observed: filiform, papilliform, and conical, distributed according to a complex pattern. The results obtained on the chaetotaxy of the oral field demonstrate a strong morphological adaptation of each copepod to its trophic habits. The ecological implications of these results on the coexistence of populations of both species in the Bahía Blanca estuary are discussed., Scanning electron microscopy (SEM) was used to study the morphology of the integumental structures in the oral field of the copepods Eurytemora affinis and Acartia tonsa. Structures observed in these two copepods were different in type, number, and location. E. affinis presented only structures of a filiform type, distributed all over the oral field, whereas in A. tonsa three different types of structures were observed: filiform, papilliform, and conical, distributed according to a complex pattern. The results obtained on the chaetotaxy of the oral field demonstrate a strong morphological adaptation of each copepod to its trophic habits. The ecological implications of these results on the coexistence of populations of both species in the Bahía Blanca estuary are discussed.]

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/content/journals/10.1163/156854097x00564
1997-01-01
2015-02-28

Affiliations: 1: ) Instituto Argentino de Oceanografia, CONICET/ Universidad Nacional Sur, Av. Alem 53, 8000 Bahía Blanca, Argentina; 2: ) Instituto de Investigaciones Bioquimicas, CONICET/ Universidad Nacional Sur, C.C. 857, 8000 Bahía Blanca, Argentina

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