closed seasons or area closure (e. g. , protected areas) been considered. Estuaries are productive ecosystems that provide The purpose of this study was to test the numerous ? shery opportunities and food for hypothesis that an estuarine species as the spotted people. In South Africa, temporarily resident grunter Pomadasys commersonnii is evenly d- estuarine ? sh populations are exploited for both tributed within the estuary and uniformly food, mainly subsistence, and recreation. Little is exploited by different groups of ? shers. This was known about the status of estuarine ? sheries, but done by investigating the movement behavior of it is widely believed that they have contributed legally undersized (
Inhaltsverzeichnis
Human Impacts and Fisheries. - Efforts to aid downstream migrating brown trout (Salmo trutta L.) kelts and smolts passing a hydroelectric dam and a spillway. - Walking speed and area utilization of red king crab (Paralithodes camtschaticus) introduced to the Barents Sea coastal ecosystem. - Movements of undersized spotted grunter (Pomadasys commersonnii) in the Great Fish Estuary, South Africa: implications for fisheries management. - Effects of salmon lice infection and salmon lice protection on fjord migrating Atlantic salmon and brown trout post-smolts. - Migration and Behaviour. - Upstream migration of adult chum and pink salmon in the Shibetsu River. - Riverine and early ocean migration and mortality patterns of juvenile steelhead trout (Oncorhynchus mykiss) from the Cheakamus River, British Columbia. - Conventional and EMG telemetry studies of upstream migration and tailrace attraction of adult Atlantic salmon at a hydroelectric installation on the Exploits River, Newfoundland, Canada. - Mid-winter activity and movement of Atlantic salmon parr during ice formation events in a Norwegian regulated river. - Results of satellite tagging of Atlantic bluefin tuna, Thunnus thynnus, off the coast of Ireland. - Fjord migration and survival of wild and hatchery-reared Atlantic salmon and wild brown trout post-smolts. - Hatchery-reared fish have less consistent behavioral pattern compared to wild individuals, exemplified by red tilefish studied using video observation and acoustic telemetry tracking. - Species Conservation and Habitat Rehabilitation. - Sea lamprey (Petromyzon marinus L.) spawning migration in the Vouga river basin (Portugal): poaching impact, preferential resting sites and spawning grounds. - Habitat use and fish activity of landlocked Atlantic salmon and brook charr in anewly developed habitat compensation facility. - Mobility of individual roach Rutilus rutilus (L.) in three weir-fragmented Belgian rivers. - Assessment of a retrofitted downstream fish bypass system for wild Atlantic salmon (Salmo salar) smolts and kelts at a hydroelectric facility on the Exploits River, Newfoundland, Canada. - PIT telemetry as a method to study the habitat requirements of fish populations: application to native and stocked trout movements. - Methodology and New Technology. - Introducing a method for extracting horizontal migration patterns from data storage tags. - Feeding activity and opercular pressure transients in Atlantic salmon (Salmo salar L.): application to feeding management in fish farming. - Laboratory protocol to calibrate sea lamprey (Petromyzon marinus L.) EMG signal output with swimming. - Effects of antenna length and material on output power and detection of miniature radio transmitters. - Comparison between PIT and radio telemetry to evaluate winter habitat use and activity patterns of juvenile Atlantic salmon and brown trout. - Assessment of largemouth bass (Micropterus salmoides) behaviour and activity at multiple spatial and temporal scales utilizing a whole-lake telemetry array. - Techniques for evaluating the spatial behaviour of river fish. - Use of muscle activity indices as a relative measure of well-being in cultured sea bass Dicentrarchus labrax (Linnaeus, 1758). - Efficacy and accuracy of portable PIT-antennae when locating fish in ice-covered streams. - Growth, survival, and tag retention of steelhead trout (O. mykiss) surgically implanted with dummy acoustic tags.
