Between 1991 and 1997 a photo-identification study of Southeastern Pacific humpback whales was carried out on the central coast Ecuador (1°26’S, 80°50’W), South America. During this period, total 219 were identified catalogued by colouration pattern ventral side their flukes. Naturally marked used to estimate population through Petersen’s mark-recapture method as modified Bailey. With data from...

Abstract Most studies about benthic community use small-scale sampling methods focused on the infauna such as grabs or box-corers. The data collected by scientific trawl surveys in all European waters, frame of Common Fishery Policy Data Collection Multiannual Program, can be used to study impact large-scale fisheries trawling. However, catchability trawls is very dependent nature seabed well r...

Establishing sampling techniques for juveniles of tuna species is essential understanding their ecology and population dynamics because only individuals showing rapid growth during larval juvenile stages are able to survive. This study the first report on successful using larva catcher (LC)-type trawl net, a pelagic gear with 10 × 10-m mouth opening, 40-m total length, 5 5-mm mesh size. It was ...

Many bird species avoid traditional traps such as mist nets, thus alternative trapping methods are often needed. The Rufous Hornero (Furnariidae: Furnarius rufus) is one that was captured so far using conventional netting in rural areas or nest-targeted traps, which risk nest damage and abandonment. Here we describe the novel rise-up mist-netting (RUM) protocol its catchability for wary territo...

Abstract Developing Species Distribution Models (SDM) for marine exploited species is a major challenge in fisheries ecology. Classical modelling approaches typically rely on fish research survey data. They benefit from standardized sampling design and controlled catchability, but they usually occur once or twice year may sample relatively small number of spatial locations. Spatial monitoring c...