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Diffusion in the littoral zone: scoping emergence times and movement to essential habitat for young‐of‐year brook trout in lakes

Identifieur interne : 008013 ( Main/Exploration ); précédent : 008012; suivant : 008014

Diffusion in the littoral zone: scoping emergence times and movement to essential habitat for young‐of‐year brook trout in lakes

Auteurs : M. F. Coombs [Canada] ; M. S. Ridgway [Canada]

Source :

RBID : ISTEX:AB131A9DDE0444DFD6969FD31C5BCB2DB34CE80E

Descripteurs français

English descriptors

Abstract

Factors governing the process of dispersal of lake‐spawned brook trout (Salvelinus fontinalis) young‐of‐year (YOY) appear drastically different from those governing dispersal in more commonly studied stream salmonids. Rather than dispersal being highly density‐dependent and the result of territoriality and aggression, in brook trout it may be density‐independent and driven by a common need for coldwater habitat for summer survival. Emerging fish travel great distances from single spawning sites on lakes to cold groundwater habitat. Movement is a gradual, one‐dimensional diffusion around lake margins and represents a very unique and simplified natal dispersal pathway allowing for dispersal rates, distances, and factors controlling these parameters to be measured. We predicted timing of the emergence period for brook trout alevins from lake spawning sites using the known relation between water temperature and emergence times for salmonids. Emergence and dispersal was then observed in the field by visually estimating YOY density in segments of the littoral zone throughout the dispersal period. Fluxes in density in these sections were used to estimate rate of YOY spread. YOY behaviour and body condition was also assessed across the wave of spatial spread. We are working towards a spatially explicit model to identify critical groundwater rearing habitat needing protection from forestry activities.

Url:
DOI: 10.1111/j.1095-8649.2003.216aw.x


Affiliations:


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Le document en format XML

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<term>Light intensities</term>
<term>Light intensity</term>
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<term>Damselfish</term>
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<term>Different size</term>
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<term>Dominance rank</term>
<term>Dominant fish</term>
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<term>Energy expenditure</term>
<term>Environmental</term>
<term>Environmental conditions</term>
<term>Environmental extremes</term>
<term>European bitterling</term>
<term>Excysted metacercariae</term>
<term>Experimental control</term>
<term>Experimental zoology group</term>
<term>Familiar fish</term>
<term>Familiarity preferences</term>
<term>Feed intake</term>
<term>Female bitterling</term>
<term>Female quality</term>
<term>Fertilization</term>
<term>Field data</term>
<term>Filial cannibalism</term>
<term>First evidence</term>
<term>Fish</term>
<term>Fish behaviour</term>
<term>Fish biology</term>
<term>Fish cognition</term>
<term>Fish movements</term>
<term>Fish species</term>
<term>Fish stocks</term>
<term>Fish welfare</term>
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<term>Fishery</term>
<term>Flow regions</term>
<term>Focal fish</term>
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<term>Foraging behaviour</term>
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<term>Freshwater laboratory</term>
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<term>Future studies</term>
<term>Gadus morhua</term>
<term>Gasterosteus</term>
<term>Gasterosteus aculeatus</term>
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<term>Genetic differences</term>
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<term>Girardinichthys multiradiatus</term>
<term>Goby</term>
<term>Greater numbers</term>
<term>Growth rate</term>
<term>Guppy</term>
<term>Habitat</term>
<term>Habitat choice</term>
<term>Habitat preference</term>
<term>Hatchery</term>
<term>Hatchery fish</term>
<term>Helsinki</term>
<term>Homing behaviour</term>
<term>Honest signal</term>
<term>Host behaviour change</term>
<term>Important fish species</term>
<term>Individual differences</term>
<term>Individual fish</term>
<term>Internal fertilization</term>
<term>Intraspecific variability</term>
<term>Isle</term>
<term>Juvenile atlantic salmon</term>
<term>Juvenile sticklebacks</term>
<term>Karlskrona archipelago</term>
<term>Knipowitschia panizzae</term>
<term>Kyoto japan</term>
<term>Kyoto university</term>
<term>Laboratory experiments</term>
<term>Laboratory studies</term>
<term>Lake tana</term>
<term>Large males</term>
<term>Larger males</term>
<term>Larval dispersal</term>
<term>Late afternoon</term>
<term>Leeds</term>
<term>Life cycle</term>
<term>Light environments</term>
<term>Light intensities</term>
<term>Light intensity</term>
<term>Littoral zone</term>
<term>Louis compton miall building</term>
<term>Lowestoft</term>
<term>Lowestoft laboratory</term>
<term>Main building</term>
<term>Male</term>
<term>Male competition</term>
<term>Male mating success</term>
<term>Male sticklebacks</term>
<term>Marine biology</term>
<term>Marine ecology</term>
<term>Marine science</term>
<term>Marine species</term>
<term>Mating success</term>
<term>Mating system</term>
<term>Mating systems</term>
<term>Migratory behaviour</term>
<term>Model species</term>
<term>Model system</term>
<term>Mosquito fish</term>
<term>Mussel</term>
<term>Natural populations</term>
<term>Natural resources</term>
<term>Neighbour</term>
<term>Nemachilus angorae</term>
<term>Nest opening</term>
<term>Network theory</term>
<term>Nocturnal foraging excursions</term>
<term>Normal distribution model</term>
<term>Normal stickleback males</term>
<term>Norwich</term>
<term>Nova scotia</term>
<term>Olfactory</term>
<term>Olfactory cues</term>
<term>Olfactory sensitivity</term>
<term>Original group</term>
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<term>Oviposition decisions</term>
<term>Oxygen levels</term>
<term>Pakefield road</term>
<term>Paper abstracts</term>
<term>Parablennius tentacularis</term>
<term>Paralichthys olivaceus</term>
<term>Parasite</term>
<term>Parasitic</term>
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<term>Parr</term>
<term>Physiological condition</term>
<term>Piscivorous barbus</term>
<term>Plaice</term>
<term>Poecilia reticulata</term>
<term>Pool habitat</term>
<term>Population biology</term>
<term>Population densities</term>
<term>Population differences</term>
<term>Population dynamics</term>
<term>Population structure</term>
<term>Predation</term>
<term>Predator</term>
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<term>Present data</term>
<term>Present study</term>
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<term>Putative prey</term>
<term>Queen mary</term>
<term>Recent work</term>
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<term>Reproductive success</term>
<term>Resource competition</term>
<term>Results show</term>
<term>Rhodeus sericeus</term>
<term>River discharge</term>
<term>Salmo salar</term>
<term>Salmo trutta</term>
<term>Salmon</term>
<term>Salmon parr</term>
<term>Salmonid</term>
<term>Same time</term>
<term>Secondary males</term>
<term>Several species</term>
<term>Sexual selection</term>
<term>Shallow waters</term>
<term>Shoal</term>
<term>Shoaling</term>
<term>Shoaling behaviour</term>
<term>Shoaling tendency</term>
<term>Significant differences</term>
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<term>Unfamiliar fish</term>
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<term>Water flow rate</term>
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<term>Water velocity</term>
<term>Wavelength spectrum</term>
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<term>Western australia</term>
<term>Wide range</term>
<term>Wild populations</term>
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<term>Aquiculture</term>
<term>Biologie</term>
<term>écologie</term>
<term>Poisson</term>
<term>Ressource alimentaire</term>
<term>Eau douce</term>
<term>Habitat</term>
<term>Ressource naturelle</term>
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<front>
<div type="abstract" xml:lang="en">Factors governing the process of dispersal of lake‐spawned brook trout (Salvelinus fontinalis) young‐of‐year (YOY) appear drastically different from those governing dispersal in more commonly studied stream salmonids. Rather than dispersal being highly density‐dependent and the result of territoriality and aggression, in brook trout it may be density‐independent and driven by a common need for coldwater habitat for summer survival. Emerging fish travel great distances from single spawning sites on lakes to cold groundwater habitat. Movement is a gradual, one‐dimensional diffusion around lake margins and represents a very unique and simplified natal dispersal pathway allowing for dispersal rates, distances, and factors controlling these parameters to be measured. We predicted timing of the emergence period for brook trout alevins from lake spawning sites using the known relation between water temperature and emergence times for salmonids. Emergence and dispersal was then observed in the field by visually estimating YOY density in segments of the littoral zone throughout the dispersal period. Fluxes in density in these sections were used to estimate rate of YOY spread. YOY behaviour and body condition was also assessed across the wave of spatial spread. We are working towards a spatially explicit model to identify critical groundwater rearing habitat needing protection from forestry activities.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Canada</li>
</country>
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<country name="Canada">
<noRegion>
<name sortKey="Coombs, M F" sort="Coombs, M F" uniqKey="Coombs M" first="M. F." last="Coombs">M. F. Coombs</name>
</noRegion>
<name sortKey="Ridgway, M S" sort="Ridgway, M S" uniqKey="Ridgway M" first="M. S." last="Ridgway">M. S. Ridgway</name>
</country>
</tree>
</affiliations>
</record>

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