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You searched for: Journal Canadian journal of fisheries and aquatic sciences Remove constraint Journal: Canadian journal of fisheries and aquatic sciences Publication Year 2018 Remove constraint Publication Year: 2018 Source 2018 v.75 no.2 Remove constraint Source: 2018 v.75 no.2
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1. Comparative fishing to evaluate the viability of an aligned footgear designed to reduce seabed contact in northern shrimp bottom trawl fisheries

Author:
Winger, Paul D.; Munden, Jenna G.; Nguyen, Truong X.; Grant, Scott M.; Legge, George
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 201-210
ISSN:
1205-7533
Subject:
Mallotus villosus; Pandalus borealis; Reinhardtius hippoglossoides; coasts; fisheries; hydraulic flumes; viability; Canada
Abstract:
... We developed and evaluated an innovative trawl technology that reduces seabed contact while targeting northern shrimp (Pandalus borealis) off the east coast of Canada. The innovative footgear, referred to as the “aligned footgear”, was evaluated in a flume tank to estimate contact area with the seabed and then tested at sea for engineering performance and catchability. Results demonstrated that th ...
DOI:
10.1139/cjfas-2016-0461

2. Ecosystem size and flooding drive trophic dynamics of riparian spiders in a fire-prone Sierra Nevada river system

Author:
Jackson, Breeanne K.; Sullivan, S. Mažeika P.
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 308-318
ISSN:
1205-7533
Subject:
Tetragnathidae; aquatic food webs; canopy; ecosystems; floods; mountains; regression analysis; rivers; subsidies; topographic slope; watersheds; wildfires; California
Abstract:
... Disturbance can play an important role in structuring stream food webs. Although floods have received the greatest attention as a disturbance agent in rivers, wildfire — which can strongly influence fluvial ecosystem structure and function — may also drive consumer trophic dynamics. We measured the relative effects of wildfire, hydrologic disturbance, ecosystem size, and canopy openness (as a prox ...
DOI:
10.1139/cjfas-2017-0045

3. Eurasian tench (Tinca tinca): the next Great Lakes invader

Author:
Avlijaš, Sunčica; Ricciardi, Anthony; Mandrak, Nicholas E.
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 169-179
ISSN:
1205-7533
Subject:
Gastropoda; Tinca tinca; algae; bycatch; environmental impact; fish; invasive species; lakes; macrophytes; models; monitoring; parasites; pathogens; risk assessment; rivers; water quality; Great Lakes; North America; Saint Lawrence River
Abstract:
... A globally invasive fish, Eurasian tench (Tinca tinca) is spreading through the St. Lawrence River and poses an imminent invasion threat to the Great Lakes. Following its illegal release into a tributary of the St. Lawrence River in 1991, tench has spread throughout the river’s main stem over the past decade, and its abundance in commercial fishing bycatch in the river has grown exponentially. The ...
DOI:
10.1139/cjfas-2017-0171

4. Evaluating trade-offs in bull trout reintroduction strategies using structured decision making

Author:
Brignon, William R.; Peterson, James T.; Dunham, Jason B.; Schaller, Howard A.; Schreck, Carl B.
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 293-307
ISSN:
1205-7533
Subject:
Salvelinus confluentus; adaptive management; adults; carrying capacity; decision making; fecundity; juveniles; models; sex ratio; uncertainty
Abstract:
... Structured decision making allows reintroduction decisions to be made despite uncertainty by linking reintroduction goals with alternative management actions through predictive models of ecological processes. We developed a decision model to evaluate the trade-offs between six bull trout (Salvelinus confluentus) reintroduction decisions with the goal of maximizing the number of adults in the recip ...
DOI:
10.1139/cjfas-2016-0516

5. Evolution of boldness and life history in response to selective harvesting

Author:
Andersen, Ken H.; Marty, Lise; Arlinghaus, Robert
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 271-281
ISSN:
1205-7533
Subject:
aquacultural and fisheries equipment; energy intake; fish; fisheries; foraging; life history; models; mortality; personality; predation; risk; selective harvesting; social welfare
Abstract:
... Whether intensive harvesting alters the behavioral repertoire of exploited fishes is currently unknown, but plausible. We extend a fish life-history model to account for boldness as a personality trait that affects foraging intensity, which affects energy intake and risk from predation and fishing gear. We systematically investigate life-history and behavioral trait evolution along the boldness–ti ...
DOI:
10.1139/cjfas-2016-0350

6. Including unsexed individuals in sex-specific growth models

Author:
Minto, Cóilín; Hinde, John; Coelho, Rui
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 282-292
ISSN:
1205-7533
Subject:
growth curves; growth models; sexual dimorphism; sharks
Abstract:
... Sexually dimorphic growth models are typically estimated by fitting growth curves to individuals of known sex. Yet, macroscopically ascribing sex can be difficult, particularly for immature animals. As a result, sex-specific growth curves are often fit to known-sex individuals only, omitting unclassified immature individuals occupying an important region of the age–length space. We propose an alte ...
DOI:
10.1139/cjfas-2016-0450

7. Isotopic insights into migration patterns of Pacific bluefin tuna in the eastern Pacific Ocean

Author:
Madigan, Daniel J.; Baumann, Zofia; Carlisle, Aaron B.; Snodgrass, Owyn; Dewar, Heidi; Fisher, Nicholas S.
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 260-270
ISSN:
1205-7533
Subject:
Thunnus orientalis; anchovies; carbon; cesium; crabs; diet; ecosystems; forage; migratory behavior; nitrogen; radionuclides; sardines; stable isotopes; Pacific Ocean
Abstract:
... Understanding regional migration, residency dynamics, and associated trophic ecology can inform recovery strategies for pelagic species such as Pacific bluefin tuna (Thunnus orientalis) (PBFT). PBFT residency duration in the eastern Pacific is uncertain, particularly for larger individuals (here, >100 cm or ∼3+ years of age). We applied a previously tested “chemical tracer toolbox” (Fukushima-deri ...
DOI:
10.1139/cjfas-2016-0504

8. Longitudinal variability in lateral hydrologic connectivity shapes fish occurrence in temporary floodplain ponds

Author:
Couto, Thiago Belisario d’Araújo; Zuanon, Jansen; Olden, Julian D.; Ferraz, Gonçalo
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 319-328
ISSN:
1205-7533
Subject:
Anablepsoides; fish communities; floodplains; foraging; habitats; hydrology; lotic systems; models; ponds; spawning; streams; tropical fish
Abstract:
... Dynamic flow regimes maintain critical connections between main channel and adjacent floodplain habitats that provide fish access to shelter, foraging, and spawning opportunities. Our study advances the understanding of these processes by exploring the importance of coupled longitudinal–lateral connectivity for determining species occurrence in headwater streams of the Amazon. Using a multispecies ...
DOI:
10.1139/cjfas-2016-0388

9. Modeling the drift of European (Anguilla anguilla) and American (Anguilla rostrata) eel larvae during the year of spawning

Author:
Westerberg, Håkan; Pacariz, Selma; Marohn, Lasse; Fagerström, Vilhelm; Wysujack, Klaus; Miller, Michael J.; Freese, Marko; Pohlmann, Jan-Dag; Hanel, Reinhold
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 224-234
ISSN:
1205-7533
Subject:
Anguilla anguilla; Anguilla rostrata; Gulf Stream; climatic factors; eel; leptocephalus larvae; models; spawning; surveys; Sargasso Sea
Abstract:
... The distribution of the leptocephalus larvae of European (Anguilla anguilla) and American (Anguilla rostrata) eels collected during recent Sargasso Sea surveys was used to model larval drift. The drift trajectories of individual larva were back-calculated to the estimated time of spawning, using current data from two global oceanographic assimilation models. The results of both models give the sam ...
DOI:
10.1139/cjfas-2016-0256

10. Movement patterns and rheoreaction of larvae of a fluvial specialist (nase, Chondrostoma nasus): the role of active versus passive components of behaviour in dispersal

Author:
Zens, Bernhard; Glas, Martin; Tritthart, Michael; Habersack, Helmut; Keckeis, Hubert
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 193-200
ISSN:
1205-7533
Subject:
Chondrostoma nasus; fish larvae; habitats; hydraulic flumes; ontogeny; rheophilic species; rivers; swimming
Abstract:
... The dispersal of fish larvae in rivers might result from water movement but also from larval behaviour. Although potentially crucial for dispersion, knowledge of the role of behaviour is still fragmentary. This study intends to contribute to the question of how riverine fish larvae drift or move. All dispersal-relevant movement patterns of larvae of a characteristic rheophilic species were analyze ...
DOI:
10.1139/cjfas-2016-0276

11. Patterns in larval reef fish distributions and assemblages, with implications for local retention in mesoscale eddies

Author:
Shulzitski, K.; Sponaugle, S.; Hauff, M.; Walter, K.D.; D’Alessandro, E.K.; Cowen, R.K.
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 180-192
ISSN:
1205-7533
Subject:
environmental factors; fish larvae; reproductive performance; Florida
Abstract:
... Benthic marine populations are often replenished by a combination of larvae from local and distant sources. To promote retention of locally spawned larvae in strong, unidirectional boundary current systems, benthic marine organisms must utilize biophysical mechanisms to minimize advective loss. We examined patterns in larval fish abundance, age distribution, and assemblage in relation to environme ...
DOI:
10.1139/cjfas-2016-0304

12. Rapid changes in age and size at maturity in Lake Erie yellow perch (Perca flavescens) are not explained by harvest

Author:
Gíslason, Davíð; McLaughlin, Robert L.; Robinson, Beren W.; Cook, Andy; Dunlop, Erin S.
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 211-223
ISSN:
1205-7533
Subject:
Perca flavescens; ecosystems; freshwater fish; harvesting; juveniles; life history; models; phenotype; phenotypic plasticity; Lake Erie
Abstract:
... Harvest can change phenotypic traits of populations through immediate demographic consequences, evolutionary responses to harvest selection, or developmental responses by individuals. This study investigated the plastic phenotypic effects of harvest on size and age at maturity in a commercially exploited freshwater fish. We tested an individual growth and life history plasticity model using lagged ...
DOI:
10.1139/cjfas-2016-0211

13. Spatiotemporal dynamics of larval fish in a tropical estuarine mangrove: example of the Mahury River Estuary (French Guiana)

Author:
Rousseau, Yann; Blanchard, Fabian; Gardel, Antoine
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 235-246
ISSN:
1205-7533
Subject:
Eleotridae; Engraulidae; Gobiidae; Sciaenidae; dominant species; estuaries; fish larvae; freshwater; ichthyoplankton; life history; rivers; temporal variation; French Guiana
Abstract:
... The present study focuses on the structure and dynamics of the ichthyoplankton community of the Mahury estuary (French Guiana) and the factors that influence them. Data were collected on three mangrove sites located in the inner, middle, and outer areas of the estuary. More than 45 000 larvae were collected, representing 31 families and 67 taxa. The community was numerically dominated by few speci ...
DOI:
10.1139/cjfas-2016-0267

14. The influence of discharge, current speed, and development on the downstream dispersal of larval nase (Chondrostoma nasus) in the River Danube

Author:
Lechner, Aaron; Keckeis, Hubert; Glas, Martin; Tritthart, Michael; Habersack, Helmut; Andorfer, Laurin; Humphries, Paul
Source:
Canadian journal of fisheries and aquatic sciences 2018 v.75 no.2 pp. 247-259
ISSN:
1205-7533
Subject:
Chondrostoma nasus; carp; larvae; river flow; rivers; Austria; Danube River
Abstract:
... We investigated the mode (active versus passive) of larval downstream dispersal and its influencing factors in the nase carp (Chondrostoma nasus). Marked larvae (early and later stages), together with equivalent numbers of passive particles, were released in the main channel of the River Danube (Austria) at different flow (low, high) and current (over-critical, under-critical) conditions. Larvae a ...
DOI:
10.1139/cjfas-2016-0340