Abstract Predators often predate on a limited size range of prey, which may or not overlap with ranges same prey targeted by fisheries. When they do overlap, the effect competition over that is immediate, as predator removes are at time suitable for fishery. However, if consumes species fishery, but targets smaller sizes, this predation sizes result in potential loss future, rather than current...

Project Concepts Our project is unique in our effort to combine the ideas and draw upon the expertise of scientists from a number of different disciplines: sea turtle biology and physiology, population dynamics, fisheries science, and oceanography. Our project has already generated multiple new theories regarding the causes of sea turtle declines and the role of pelagic fisheries in those decli...

Small pelagic fisheries show wide fluctuations, generally attributed to oceanographic anomalies. Most data on these fisheries come from landings, often reporting sustained catches-per-unit-effort (CPUEs) until a decline occurs. Fishery-independent data are important as management tools. In this study we show that the proportions of Pacific Sardine and Northern Anchovy in the diet of three seabi...

Body size is a key parameter influencing demographic characteristics of fish populations as well as market value of landed catch. Yet in bioeconomic modelling body size is often an overlooked biological and economic parameter. Here we evaluate how sizedependent pricing influences optimal harvest strategies in a model parameterized for two pelagic fisheries, those targeting Atlantic herring (Clu...

A joint WDCS/Greenpeace cetacean survey using conventional line-transect techniques and trialling other survey methodologies, including acoustic detection, was carried out between 21st of January and 8th of March 2004 in the Western Approaches of the English Channel. The main aims of this survey were to study the local dolphin, porpoise and whale populations, to monitor the winter pelagic trawl...

Contents 1. Introduction 2. Physical characteristics and overview 3. Lower trophic level bio-physical-chemical interactions. 4. Holozooplankton and merozooplankton 5. Pelagic fish distribution and abundance patterns off Perú and Chile 6. The benthic, nearshore and intertidal ecosystems 7. Anthropogenic Influences 8. Conclusions 9. Appendix: Examples of biogeochemical and trophic links in specif...

Fisheries bycatch of marine animals has been linked to population declines of multiple species, including many sea turtles. Altering the visual cues associated with fishing gear may reduce sea turtle bycatch. We examined the effectiveness of illuminating gillnets with ultraviolet (UV) light-emitting diodes for reducing green sea turtle (Chelonia mydas) interactions. We found that the mean sea t...

Behavioral ontogeny of marine pelagic fishes is reviewed in the context of sustainable fisheries resource management. In carangid fishes, development of sensory organs corresponds with their basic behavior such as phototaxis and optokinetic response, whereas the onset of schooling requires the development of the central nervous systems (CNS). Because docosahexaenoic acid (DHA) is indispensable ...