A5081796168- Fish Ecology and Management Studies
- Marine and fisheries research
- Parasite Biology and Host Interactions
- Wildlife Ecology and Conservation
- Identification and Quantification in Food
- Rangeland and Wildlife Management
- Hydrology and Sediment Transport Processes
- Fish Biology and Ecology Studies
- Genetic diversity and population structure
- Ecology and biodiversity studies
- Cephalopods and Marine Biology
- Marine animal studies overview
- Crustacean biology and ecology
- Aquaculture Nutrition and Growth
- Aquatic Invertebrate Ecology and Behavior
- Bird parasitology and diseases
- Marine Biology and Ecology Research
- Hydrology and Watershed Management Studies
- Food Safety and Hygiene
- Marine Bivalve and Aquaculture Studies
- Fire effects on ecosystems
- Ecology and Vegetation Dynamics Studies
- Avian ecology and behavior
- Genetic and phenotypic traits in livestock
- Animal Disease Management and Epidemiology
Simon Fraser University
2010-2023
University of Victoria
2004-2013
Raincoast Conservation Foundation
2007-2013
Vancouver Coastal Health
2010
University of California, Santa Cruz
2008
University of California, Santa Barbara
1978-1990
Seasonal food habits and activity patterns were examined for grizzly bears (Ursus arctos) in west-central Alberta, Canada, to better understand habitat requirements a threatened population. Food based on an analysis of 665 feces collected from 18 between April October 2001–2003. Trends the use foods comparable those other central Rocky Mountain populations, with minor differences likely reflecting regional forage availability. Five activities (bedding, sweet vetch digging, insect feeding,...
Abstract Conservation scientists rarely have the information required to understand changes in abundance over more than a few decades, even for important species like Pacific salmon. Such lack of historical can underestimate magnitude decline depressed populations. We applied genetic tools unique collection 100‐year‐old salmon scales reveal declines 56%–99% wild sockeye populations across Canada's second largest watershed, Skeena River. These analyses century‐long that are much greater those...
Canada’s Policy for Conservation of Wild Pacific Salmon has been heralded as a transformative approach to the management wild salmon whereby conservation is highest priority. Given that changes are under consideration, it timely we understand whether our state knowledge and status in Canada have indeed improved after its adoption 2005. To answer these questions, used two indices improvement: (i) monitoring effort (ii) abundance spawning adults. Our results, based on data all species from...
FisheriesVolume 45, Issue 6 p. 303-318 AFS 150th Anniversary Celebration A Brief History of Fisheries in Canada Rowshyra A. Castañeda, Corresponding Author Castañeda rowshyra.castaneda@mail.utoronto.ca orcid.org/0000-0002-8484-1143 University Toronto, Department Ecology and Evolutionary Biology, ON, M5S 3B2 Toronto Scarborough, Biological Sciences, author: rowshyra.castaneda@mail.utoronto.caSearch for more papers by this authorColleen M. Burliuk, Colleen Burliuk Queen's University, Kingston,...
Abstract Current investment in conservation is insufficient to adequately protect and recover all ecosystems species. The challenge of allocating limited funds acute for Pacific salmon Oncorhynchus spp. Canada, which lack a strategic approach ensure that resources are spent on actions most likely cost‐effectively diminished populations. We applied the Priority Threat Management framework prioritize strategies maximize number thriving populations Central Coast British Columbia, Canada. These...
Abstract Aim Predator–prey dynamics in fragmented areas may be influenced by spatial features of the landscape. Although little is known about these processes, an increasingly planet underscores urgency to predict its consequences. Accordingly, our aim was examine foraging behaviour apex mammalian predator, wolf ( Canis lupus ), archipelago environment. Location Mainland and adjacent British Columbia, Canada; a largely pristine naturally landscape with islands variable size isolation....
Abstract Although managers safeguard protected areas for migratory species, little consideration has been given to how species might benefit parks. Additionally, whereas land‐sea connections are considered in management of areas, most effort focused on reducing negative “downstream” processes. Here, we offer a proposal promote positive “upstream” processes by safeguarding the seasonal pulse marine nutrients imported into freshwater and riparian ecosystems spawning migrations Pacific salmon....
Background Pathogens are growing threats to wildlife. The rapid growth of marine salmon farms over the past two decades has increased host abundance for pathogenic sea lice in coastal waters, and wild juvenile swimming frequently infected with lice. Here we report first investigation potential role transmitting sockeye (Oncorhynchus nerka). Methodology/Principal Findings We used genetic analyses determine origin from Canada's most important rivers, Fraser Skeena; migrate through a region...
The ability to distinguish between different migratory behaviours (e.g., anadromy and potamodromy) in fish can provide important insights into the ecology, evolution, conservation of many aquatic species. We present a simple stable carbon isotope (δ13C) approach for distinguishing sockeye (anadromous ocean migrants) kokanee (potamodromous freshwater residents), two ecotypes Oncorhynchus nerka (Salmonidae) that is applicable throughout most their range across coastal regions North Pacific...
Abstract Population and life‐history diversity can buffer species from environmental variability contribute to long‐term stability through differing responses varying conditions akin the stabilizing effect of asset on financial portfolios. While it is well known that many salmon populations have declined in abundance over last century, we understand less about how different dimensions may shifted. Specifically, has diminished wild increased artificial production (i.e. enhancement) changed...
The management of Pacific salmon ( Oncorhynchus spp.) populations, which are spatially distributed across thousands waterways in coastal British Columbia, Canada, presents considerable challenges to resource managers. We evaluated the efficacy by Fisheries and Oceans Canada (DFO) over past 55 years two key areas: (i) achievement internally generated target escapement levels (ii) monitoring. show that less than 4% monitored streams (n = 7 215), represent a small fraction all salmon-bearing...
Salmon farms are spatially concentrated reservoirs of fish host populations that can disrupt natural salmonid host–parasite dynamics. Sea lice frequently infect farm salmon and parasitize sympatric wild juvenile salmonids, with negative impacts on survival in Europe Pacific Canada. We examined louse parasitism chum ( Oncorhynchus keta ) pink gorbuscha from three farming regions British Columbia (Finlayson, Broughton Archipelago, Georgia Strait). compared sites low high exposure to included...
Daily growth rings were examined in the otoliths of wild juvenile sockeye salmon Oncorhynchus nerka to determine whether infection by ectoparasitic sea lice Caligus clemensi and Lepeophtheirus salmonis was associated with reduced host body growth, an important determinant survival. Over 98% proved be C. fish that highly infected grew more slowly than uninfected individuals. Larger also faster smaller fish. Finally, there evidence interaction between size status, indicating potential for...
Abstract Mortality of salmon during early marine life has long been thought to be a critical factor in limiting overall abundance. One the key hypotheses proposed explain long‐term productivity decline Canada's iconic Fraser River Sockeye Salmon Oncorhynchus nerka , is deficient habitat conditions experienced life. Our study first step towards testing this hypothesis, with an aim understanding food availability and prey choice juvenile their coastal migration. We investigated zooplankton...
Abstract The impacts of climate change are widespread and threaten natural systems globally. Yet, within regions, heterogeneous physical landscapes can differentially filter climate, leading to local response diversity. For example, it is possible that while freshwater lakes sensitive change, they may exhibit a diversity thermal responses owing their unique morphology, which in turn affect the growth survival vulnerable biota such as fishes. In particular, salmonids cold‐water fishes with...
Abstract We used reported commercial catch data and historical information to estimate the abundance of Skeena River Chum Salmon Oncorhynchus keta during early rise (1916–1919) in fishery provide perspective for recovery plans. applied a Bayesian analysis address uncertainties associated with estimation process. Based on 204,000 1919 an estimated harvest rate 0.32–0.58, return ranged from 355,000 619,000, most probable single being 431,000. The based 1916–1919 geometric mean 154,000 268,000...
Abstract The transmission of pathogens is a common consequence animal food production. Marine salmon farms and their processing facilities can serve as sources virulent fish pathogens; our study the first to confirm broadcast live pathogen from farmed facility into marine waters Canada's Pacific coast. We found lice Lepeophtheirus salmonis, mucus, tissue in effluent facility. Sea transmitted this source may pose threat wild populations, release untreated offal, including blood water,...
Archipelagos often harbour taxa that are endemic and vulnerable to disturbance. Conservation planning research for these areas depend fundamentally on accurate current taxonomic inventories. Although basic ecological information is in its infancy, the temperate rainforest islands of coastal British Columbia undergoing rapid human-caused modification, particularly logging. We report herein new mammal records as determined by prey remains faeces Wolves (Canis lupus), area’s apex mammalian...
Abstract Current investment in conservation is insufficient to adequately protect and recover all ecosystems species. The challenge of allocating limited funds acute for Pacific salmon ( Oncorhynchus spp.) Canada, which lack a strategic approach ensure that resources are spent on actions would cost-effectively diminished populations. We applied the Priority Threat Management framework prioritize strategies most likely maximize number thriving populations Central Coast British Columbia,...
The enhancement of salmon populations has long been used to increase the abundance returning spawn and/or be captured in fisheries. However, some instances can have adverse impacts on adjacent non-enhanced populations. In Canada's Skeena watershed, smolt-to-adult survival Babine Lake sockeye from 1962–2002 was inversely related smolts leaving Lake. This relationship led concern that smolt production, which is primarily enhanced by spawning channels, may depress wild (Babine and non-Babine)...