Evidence of Subpopulations of Lake Whitefish, Coregonus clupeaformis, Involving a Dwarfed Form

Fenderson, Owen C.

doi:10.1577/1548-8659(1964)93[77:eosolw]2.0.co;2

Cited by 83 publications

(71 citation statements)

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“…Indeed, the results of the ANCOVA indicate that species is the most important predictor of MeHg levels, explaining most of the variance. This is consistent with observations in some temperate lakes in North America where 'normal' lake whitefish (C. clupeaformis) coexist with a 'dwarf' form that has much slower growth rates (Fenderson 1964). The normal and dwarf ecotypes feed predominantly on benthic prey and zooplankton, respectively , broadly similar to patterns of species divergence seen in Swiss lakes with two co-existing whitefish species.…”

Section: Intralacustrine Divergence In Mercury Bioaccumulationsupporting

confidence: 88%

Speciation leads to divergent methylmercury accumulation in sympatric whitefish

et al. 2012

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Central European lake whitefish (Coregonus spp.) colonized Swiss lakes following the last glacial retreat and have undergone rapid speciation and adaptive radiation. Up to six species have been shown to coexist in some lakes, and individual species occupy specific ecological niches and have distinct feeding and reproductive ecologies. We studied methylmercury (MeHg) accumulation in sympatric whitefish species from seven Swiss lakes to determine if ecological divergence has led to different rates of MeHg bioaccumulation. In four of seven lakes, sympatric species had distinctly different MeHg levels, which varied by up to a factor of two between species. Generally, species with greater MeHg levels were smaller in body size and planktivorous, and species with lower MeHg were larger and benthivorous. While modest disparities in trophic position between species might be expected a priori to explain the divergence in MeHg, d 15 N of bulk tissue did not correlate with fish MeHg in five of seven lakes. Results of a nested ANCOVA analysis across all lakes indicated that only two factors (species, lake) explained substantial portions of the variance, with species accounting for more variance (52 %) than inter-lake differences (32 %). We suggest that differences in MeHg accumulation were likely caused by diverging metabolic traits between species, such as differences in energy partitioning between anabolism and catabolism, potentially interacting with species-specific prey resource utilization. These results indicate substantial variability in MeHg accumulation between closely related fish species, illustrating that ecological speciation in fish can lead to divergent MeHg accumulation patterns.

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Section: Intralacustrine Divergence In Mercury Bioaccumulationsupporting

confidence: 88%

Speciation leads to divergent methylmercury accumulation in sympatric whitefish

et al. 2012

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“…Similarly, the life history pattern of Poeciliopsis occidentalis (Constantz 1979) clearly points to the existence of twin forms, as do data presented for other fishes (e.g. Fenderson 1964, Frost 1965, Rupp & Redmont 1966, Messieh 1976, Kobayasi 1976, Copeman & McAllister 1978, Bruce 1980, but see Stearns 1980). This concept is consistent with other aspects of ontogeny (e.g.…”

Section: Evolution Of Guildssupporting

confidence: 73%

About processes which cause the evolution of guilds and species

Balon

1981

Environ Biol Fish

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“…The most discriminating morphological trait between them is the gill-raker apparatus whereby dwarf whitefish typically have more numerous and less separate gill-rakers than normal whitefish, resulting in a more efficient retention of smaller, planktonic prey (reviewed in Bernatchez 2004;Kahilainen et al 2007). Dwarf whitefish are further characterized by a smaller size at maturity, slower growth rate, younger age at maturation and reduced fecundity relative to normal whitefish (Fenderson 1964;Rogers & Bernatchez 2005). In some lakes at least, limnetic (dwarf) fish tend to also suffer more predation than normal whitefish (Kahilainen & Lehtonen 2002).…”

Section: Identifying Adaptive Phenotypic Traitsmentioning

confidence: 99%

On the origin of species: insights from the ecological genomics of lake whitefish

Bernatchez

Renaut

Whiteley

et al. 2010

Phil. Trans. R. Soc. B

228

317

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In contrast to the large amount of ecological information supporting the role of natural selection as a main cause of population divergence and speciation, an understanding of the genomic basis underlying those processes is in its infancy. In this paper, we review the main findings of a long-term research programme that we have been conducting on the ecological genomics of sympatric forms of whitefish (Coregonus spp.) engaged in the process of speciation. We present this system as an example of how applying a combination of approaches under the conceptual framework of the theory of adaptive radiation has yielded substantial insight into evolutionary processes in a non-model species. We also discuss how the joint use of recent biotechnological developments will provide a powerful means to address issues raised by observations made to date. Namely, we present data illustrating the potential offered by combining next generation sequencing technologies with other genomic approaches to reveal the genomic bases of adaptive divergence and reproductive isolation. Given increasing access to these new genomic tools, we argue that non-model species studied in their ecological context such as whitefish will play an increasingly important role in generalizing knowledge of speciation.

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Evidence of Subpopulations of Lake Whitefish, Coregonus clupeaformis, Involving a Dwarfed Form

Cited by 83 publications

References 0 publications

Speciation leads to divergent methylmercury accumulation in sympatric whitefish

Speciation leads to divergent methylmercury accumulation in sympatric whitefish

About processes which cause the evolution of guilds and species

On the origin of species: insights from the ecological genomics of lake whitefish

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