—The fisheries literature embodies critical assumptions about fisherman attitudes and motivations. Common assumptions are that populations of fishermen are homogeneous in motivation and decision making and that they behave in a myopic fashion, ignoring the effects of their fishing activities on the fishery resource. The results of a survey of trawl vessel captains challenge these assumptions. W...

The needlefish both full beak and halfbeaks support a good fishery in Tamil Nadu exploited by drift gillnet (Mural valai). In this study, we were focused to document the conversion of Mini trawls (Thallumadi) into light fishing craft targeting Belonids Hemiramphids along Palk Bay. detailed survey was conducted six landing centres mainly targeted catch Tylosurus crocodilus from 2000 0300 hrs at ...

State of the blue crab stock and production is considered for Russian sector Bering Sea on data bottom trawl trap surveys conducted by TINRO in 2005–2017 fishery statistics. The commercial was assessed 2018 cohort analysis. absolute majority males within West fishing zone concentrated two areas located at Koryak coast Cape Navarin, whereas aggregations were absent Olyutorsky Bay Karaginsky Bay....

We explore the potential of using data from Australia’s northern prawn fishery (NPF) vessel monitoring system(s) (VMS) to examine trawl track, trawling intensity, and stock depletion due to trawling. We simulate VMS data by subsampling global positioning system (GPS) fixes from the NPF fishing vessels at different polling intervals to examine their accuracy in describing trawl tracks. The resul...

The paper considers the problems arising in trawl fishery for Pacific squid and suggests ways to solve them. necessity of using flexible spacers (GRU) horizontal opening trawls when working on difficult soils stable output system surface is shown. ease control with GRU shown contrast systems boards. To ensure a large reduce drag, it was proposed use multi-wall trawls. According calculations, wi...

From 1 June 2010 in the Italian coastal waters of Northern Adriatic Sea, trawl fishery within three nautical miles became banned. This activity was previously allowed for some species as an exception to legislation. In order evaluate consequences both on demersal resources and economic yields which will oblige fishermen beyond miles, a pilot study performed. Twenty hauls comparing catch discard...

Although goatfishes (Mullidae Rafinesque, 1815) are among the most important commercial fishes in Turkey, no research has been found investigating characteristics and spatial patterns of goatfish fishery. Here, we assessed fishery Turkey based on microdata set Turkish National Fishery Statistics gathered by Statistical Institute (TÜİK) between 2014 2017. In this context, investigated variation ...

We analysed relationships between demersal fish species richness, environment and trawl characteristics using an extensive collection of trawl data from the oceans around New Zealand. Analyses were carried out using both generalised additive models and boosted regression trees (sometimes referred to as ‘stochastic gradient boosting’). Depth was the single most important environmental predictor ...

This study aimed to analyse the composition and seasonal variation in the fish bycatch of the Brachyplatystoma vaillantii trawl fishery in the Amazon Estuary in 2009 by monitoring the trips of 48 vessels. The bycatch represented 29% of the catches, totalling 22,228 specimens and 52 taxa, distributed in 22 families (the principal families were Ariidae, Pimelodidae, and Sciaenidae). Brachyplatyst...

Qualitative historical benthos data (1902–1912) were compared with recent data (1986) to find long-term trends in epifauna species composition in the southern North Sea that may be attributed to fishery-induced changes. In general, the frequency of occurrence of bivalve species declined, whereas scavenger and predator species (crustaceans, gastropods, and sea stars) were observed more frequentl...