Opposite selection on behavioural types by active and passive fishing gears in a simulated guppy fishery B. Diaz Pauli1†, M. Wiech1, M. Heino1, 2, 3 and A. C. Utne-Palm1, 2 1 Department of Biology, University of Bergen, Norway 2 Institute of Marine Research, Bergen, Norway 3 International Institute for Applied Systems Analysis, Laxenburg, Austria † Author for correspondence. E-mail addresses: b...

the deployment of excessive levels of fishing effort – is one of the most pressing problems for fisheries around the world (Pauly et al. 2002; Myers and Worm 2003). While attempts to address this problem continue at a single-species level, an ecosystem-based approach to fisheries management is necessary to understand the overall impacts of fishing (Dayton et al. 1995; Pitcher and Pauly 1998). I...

Impact of fishing methods and gears used on fish faunal diversity in spring-fed torrential river Relli in Darjeeling hill area of West Bengal was investigated in the present study. The fish species available in the river provide nutrition and recreation (rarely income generating) fora large number of people residing along the river bank and nearby villages and towns. The fishing methods observe...

Purpose. Determination of the main fishing gears used by recreational fishermen on Kakhovka Reservoir and their place in general system according to functional structural features. Methodology. The work is based materials obtained during 2003-2022 Reservoir. Collection processing information was carried out basis unified adapted existing methods research direct creel survey, survey fishing, int...

The article presents a new theory of designing commercial fishing gear based on the use similarity multiphysical processes occurring in and their elements at all stages operation, as well digital twins vessels, mechanisms. tools for taking into account units objects. Providing processes, digitizing them basis makes it possible to clarify hydrodynamic coefficients parts gear. There is described ...

Illegal, unreported, and unregulated (IUU) fishing is a major concern in fisheries management around the world. Several measures have been taken to address the problem. In Lake Victoria, the alleviation of IUU fishing is implemented through the Regional Plan of Action (RPOA-IUU), which restricts use of certain fishing gear, as well as prohibits fishing in closed areas and during closed seasons....

We review the evidence for fisheries-induced evolution in anadromous salmonids. Salmon are exposed to a variety of fishing gears and intensities as immature or maturing individuals. We evaluate the evidence that fishing is causing evolutionary changes to traits including body size, migration timing and age of maturation, and we discuss the implications for fisheries and conservation. Few studie...

Computational modeling is a valuable complementary tool to assess behavior of bottom trawl fishing gears. A simplified model of the gear that mainly affects to the net is proposed. The model is constrained to steady towing conditions, flat seabed and gear symmetry. Simulations proportionate a number of relevant outcomes like distribution of tensions at the warp, balance of forces at the otterbo...