Gills of the seawater fi sh Cat/w raps spixii (Agassiz, 1829) were submitted to routine processing for observation in scanning and transmission electron microscopy. The wrinkled surface of the gill filaments showed well-defined cellular ultrastructures. Microridges on cellular surface were projected over all gi ll structures, including respiratory lamellae. Chloride cells were usually at primar...

The family Ariidae, sea catfish of the order Siluriformes, is widely distributed throughout world, particularly in tropical and subtropical areas. three species Ariidae found on coasts estuaries West Africa are smoothmouth Carlarius heudelotii (Valenciennes 1840), rough-head latiscutatus (Günther 1864) Guinean parkii 1864). They have been increasingly exploited by artisanal industrial coastal f...

Three cases of skeletal anomalies in fishes Elops lacerta Valenciennes, 1847 (family Elopidae), Oreochromis niloticus (Linnaeus, 1758) (Cichlidae) and Arius latiscutatus Günther, 1864 (Ariidae) collected the Elechi Creek, a tributary Bonny River (Niger delta) were reported for first time present study. The are pugheadness, complete absence pelvic fins deformed dorsal, pectoral fins. specimens E...

In the 1970s, Tavolga conducted a series of experiments in which he found behavioral evidence that the vocalizations of the catfish species Ariopsis felis may play a role in a coarse form of echolocation. Based on his findings, he postulated a similar function for the calls of closely related catfish species. Here, we describe the physical characteristics of the predominant call-type of Ariopsi...

This trawl survey was carried out during 2013 for the stock assessment of families Haemulids, Nemipterids and Ariids in the Oman Sea. Sampling was carried out at five different stratum and depths. The highest value of CPUA of Haemulidae was estimated for Pomadasys stridens in “B” stratum (885.78 kg nm-2), for Pomadasys kaakan at depths of 10-20 m  (330.35 kg nm-2), and for Nemipteridae it was e...

Abstract This study evaluated the use of gill parasitic monogenoideans from Sciades herzbergii (Siluriformes: Ariidae) as bioindicators environmental quality in Amazonian estuarine ecosystems. Fish were caught tidal channels an impacted area - IA, near port São Luís and a reference RA, Caeté estuary, Bragança. The influence capture site seasonality on parasite abundance, variables biometric dat...