ABSTRACT The contamination of aquatic environments by microplastic has become a major threat to biodiversity. presence is documented in the fauna oceans, but, Amazon basin, reports on occurrence are few. present study surveyed fishes an area Peruvian Amazon. We sampled 61 specimens 15 commercial species from local markets city Iquitos, Loreto Department. detected total 2337 particles, 1096 gill...

The effect of rotifers, Brachionus rotundiformis (S-type), fed three different diets: A (rotifer fed Nannochloropsis oculata), B (rotifer fed N. oculata and baker's yeast, 1:1), and C (rotifer fed N. oculata and baker's yeast, 1:1, and enriched with Selcoregister mark or target), was evaluated based on the survival, growth and swim bladder inflation rate of fat snook larvae. Rotifers of treatme...

• Vesicles of Sargassum horneri tended to increase with increasing algal body weight. Contribution rate vesicles S. acoustic reflection was high. Target strength (TS) bodies increased Weight-dependent TS followed this equation: w = 11.1 log 10 W -71.1. Biomass can be estimated by measurements. A species macroalgae, , which has gas-filled vesicles, plays important roles as nursery grounds, feedi...

Many sounds produced by fishes remain to be described. Understanding sound production for vocal species would permit the development of passive acoustic monitoring fish diversity. The present study investigated in glassy sweeper Pempheris schomburgkii Guadeloupe reefs, French West Indies. Two recording approaches were used: wild and active recordings with hand-held individuals captivity. Calls ...

The present study was conducted to investigate the helminth parasites of fish. During this study a new species of genus Camallanus Railliet and Henry, 1915 (Nematoda: Camallanidae) is described from specimens found in the swim bladder of Channa orientalis Bloch and Schneider, 1801 collected from River Gwarko in Panjgur (Balochistan). This new species Camallanus boomkeri n. sp. differs from othe...

This paper describes the occurrence of digenetic Rhipidocotyle santanaensis Lunaschi, 2004 in Brazil. This parasite was found in the liver, heart, gonads, intestine, pyloric caeca, stomach, swim bladder and cavity of Acestrorhynchus lacustris (Lütken, 1875) from the Batalha River, São Paulo State, with higher incidence in gonads and digestive tract. The parasite specimens found in this study sh...