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Morfologia e hábitos alimentares de duas espécies de Engraulidae (Teleostei, Clupeiformes) na Baía de Sepetiba, Rio de Janeiro

1999; UNIVERSIDADE DE SÃO PAULO; Volume: 47; Issue: 2 Linguagem: Inglês

10.1590/s1679-87591999000200006

1982-436X

Sandra Sergipensel, Érica Pellegrini Caramaschi, Iván Sazima,

Fish Biology and Ecology Studies

Feeding habits of the engraulidid flsh - Anchoa januaria and Cetengraulis edentullus were studied in the Baia de Sepetiba, Rio de Janeiro, from July 1983 to July 1985. Dietary items and morphological structures blted to feeding indicate that the surface structures of branchial rays of A. januaria and C. edentulus are more useful for food filtration than the distance between them. Those morphological structures provide a separation of the size of dietary items, thw resoltins in different forms of feeding behaviors between two species. A. januaria is a selective zooplanktivore, picking up food items, whereas C. edentulus is a filtering phytaplanktivore. Anchoa januaria is a diurnal feeder and exploits different layers in the water column during the warm and cold seasons.