Migrations in an extreme northern population of Arctic charr Salvelinus alpinus:insights from otolith microchemistry

Radtke, Richard L.; Svenning, Martin‐A.; Malone, Daniel P.; Klementsen, A; Ruzicka, James J.; Fey, Dariusz P.

doi:10.3354/meps136013

Cited by 65 publications

(38 citation statements)

References 14 publications

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“…Climate variations can thus inflict high mortality on Arctic anadromous populations. By microchemical analysis for Sr/Ca ratios in otoliths, Radtke et al. (1996) and Svenning (2001) found that individual charr abstained from migration in some years inVårflusjøen (79°N) and Arkvatn (80°25′N) further north on Svalbard.…”

Section: Arctic Charr Salvelinus Alpinus (L)mentioning

confidence: 99%

Atlantic salmonSalmo salarL., brown troutSalmo truttaL. and Arctic charrSalvelinus alpinus(L.): a review of aspects of their life histories

Klemetsen

Amundsen

Dempson

et al. 2003

Ecology of Freshwater Fish

1,121

1,275

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-Among the species in the family Salmonidae, those represented by the genera Salmo, Salvelinus, and Oncorhynchus (subfamily Salmoninae) are the most studied. Here, various aspects of phenotypic and life-history variation of Atlantic salmon Salmo salar L., brown trout Salmo trutta L., and Arctic charr Salvelinus alpinus (L.) are reviewed. While many strategies and tactics are commonly used by these species, there are also differences in their ecology and population dynamics that result in a variety of interesting and diverse topics that are challenging for future research. Atlantic salmon display considerable phenotypic plasticity and variability in life-history characters ranging from fully freshwater resident forms, where females can mature at approximately 10 cm in length, to anadromous populations characterised by 3-5 sea-winter (5SW) salmon. Even within simple 1SW populations, 20 or more spawning life-history types can be identified. Juveniles in freshwater can use both fluvial and lacustrine habitats for rearing, and while most smolts migrate to sea during the spring, fall migrations occur in some populations. At sea, some salmon undertake extensive oceanic migrations while other populations stay within the geographical confines of areas such as the Baltic Sea. At the other extreme are those that reside in estuaries and return to freshwater to spawn after spending only a few months at sea. The review of information on the diversity of life-history forms is related to conservation aspects associated with Atlantic salmon populations and current trends in abundance and survival. Brown trout is indigenous to Europe, North Africa and western Asia, but was introduced into at least 24 countries outside Europe and now has a world-wide distribution. It exploits both fresh and salt waters for feeding and spawning (brackish), and populations are often partially migratory. One part of the population leaves and feeds elsewhere, while another part stays as residents. In large, complex systems, the species is polymorphic with different size morphs in the various parts of the habitat. Brown trout feed close to the surface and near shore, but large individuals may move far offshore. The species exhibits ontogenetic niche shifts partly related to size and partly to developmental rate. They switch when the amount of surplus energy available for growth becomes small with fast growers being younger and smaller fish than slow growers. Brown trout is an opportunistic carnivore, but individuals specialise at least temporarily on particular food items; insect larvae are important for the young in 1 Un resumen en espan˜ol se incluye detra´s del texto principal de este artı´culo. Introduction''There is no group or family of fishes that supplies better materials for the study of the effects of geographic or physiologic isolation, or which presents more curious and interesting facts in their life histories than do the various species of Salmonidae.'' (Evermann 1925) The salmonid subfamily Salmoninae comprises about 30 species ...

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Section: Arctic Charr Salvelinus Alpinus (L)mentioning

confidence: 99%

Atlantic salmonSalmo salarL., brown troutSalmo truttaL. and Arctic charrSalvelinus alpinus(L.): a review of aspects of their life histories

Klemetsen

Amundsen

Dempson

et al. 2003

Ecology of Freshwater Fish

1,121

1,275

View full text Add to dashboard Cite

show abstract

“…Consequently, the strontium:calcium ratio of the otolith records fish habitat, either salt water or fresh water, throughout the life of the fish. Radtke & Kinzie (1996) and Radtke et al (1996) have used this method successfully to document freshwater‐marine transitions.…”

Section: Otolith Analysismentioning

confidence: 99%

Long distance migration and marine habitation in the tropical Asian catfish, Pangasius krempfi

Hogan

Baird

Radtke

et al. 2007

Journal of Fish Biology

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A synthesis of catch data from southern Laos and life-history information indicate that adult Pangasius krempfi, an important Asian catfish, migrates up the Mekong River from the South China Sea in Vietnam past Cambodia, arriving in southern Laos each year in May. Strontium concentrations in the otoliths of river-caught P. krempfi are, on average, three to four times higher than the levels of strontium in the otoliths of related freshwater species, indicating marine and estuary habitation for fish caught in southern Laos. Pangasius krempfi muscle tissue samples from the same fish also exhibit stable isotope (d 15 N and d 13 C) values characteristic of marine environments. The results of this investigation support the conclusion that P. krempfi is anadromous, spending a part of its life at sea and in the brackish water of the Mekong Delta before returning to spawn in fresh water. The fish travels at least 720 km to the Khone Falls in southern Laos, and possibly further. Spawning probably occurs in fresh water from June to August at which time young fish move down the Mekong River to the Mekong Delta. The data answer a previously unresolved question (the long-distance migratory behaviour of P. krempfi) and have important implications for the management and conservation of Mekong River fishes.

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“…Consequently, trace elements incorporated into the otolith during formation can yield detailed chronological information about the environmental variation encountered by fish over their lifetime (e.g. Kalish, 1995;Radtke et al, 1996a;Campana, 1999;Ivany et al, 2000;Andrus & Crowe, 2002).…”

Section: Introductionmentioning

confidence: 99%

Development of a species-specific fractionation equation for Arctic charr (Salvelinus alpinus (L.)): an experimental approach

et al. 2010

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A species-specific fractionation equation for Arctic charr (Salvelinus alpinus (L.)) was developed experimentally for use in ecological studies of temperature-driven phenologies for the species. Juvenile Arctic charr were reared in controlled conditions at different temperatures (2-14°C), with three replicates of each temperature. Otoliths from the fish and water samples from the chambers were analysed for oxygen isotope composition and used to estimate temperature-dependent fractionation equations relating the isotopic ratio to rearing temperature. A linear and a second order polynomial relationship were estimated and validated using comparable Arctic charr data from another study. Temperatures predicted using the polynomial equation were not significantly different from recorded experimental temperatures, whereas with the linear equation there were significant differences between the predicted and measured temperatures. The polynomial equation also showed the least bias as measured by mean predictive error. Statistical comparisons of the polynomial fractionation equation to a similarly estimated equation for brook charr (Salvelinus fontinalis (Mitchill)) indicated significant differences. Results imply the need for species-specific fractionation equations, even for closely related fish. Results further suggest the polynomial form of the fractionation equation will facilitate more accurate characterisation of water temperatures suitable for use in ecological studies of temperature-driven phenologies of Arctic charr.

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Migrations in an extreme northern population of Arctic charr Salvelinus alpinus:insights from otolith microchemistry

Cited by 65 publications

References 14 publications

Atlantic salmonSalmo salarL., brown troutSalmo truttaL. and Arctic charrSalvelinus alpinus(L.): a review of aspects of their life histories

Atlantic salmonSalmo salarL., brown troutSalmo truttaL. and Arctic charrSalvelinus alpinus(L.): a review of aspects of their life histories

Long distance migration and marine habitation in the tropical Asian catfish, Pangasius krempfi

Development of a species-specific fractionation equation for Arctic charr (Salvelinus alpinus (L.)): an experimental approach

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