Mating System and Social Structure

Jordan, William Chester; Fleming, Ian A.; Garant, Dany

doi:10.1002/9780470995846.ch6

Cited by 9 publications

(24 citation statements)

References 116 publications

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“…In Norway, where the two species cohabit, typical frequencies of 0.24–0.87% have been observed (Hindar & Balstad ), similar to other areas (Jordan et al . ; Makhrov et al . ).…”

Section: Discussionmentioning

confidence: 99%

“…A review of the literature (Jordan et al . ; Makhrov et al . ) found such a bias in Britain, where G. salaris is absent, whereas in Spain and Ireland, all hybrids studied had salmon mothers.…”

Section: Discussionmentioning

confidence: 99%

“…While genetic differences among populations may play a role, these differences are most likely due to differences in ecological and behavioural factors on the directionality of crossing, with factors such as overlap of spawning timing, scarcity of one or both species, presence of early‐maturing dwarf males and exotic status of one species indicated as important (Jordan et al . ; Makhrov et al . ).…”

Section: Discussionmentioning

confidence: 99%

“…Alvarez and Garcia‐Vasquez () found hatchery crosses of hybrids with trout mothers to have higher mortality, more deformities and later hatching, although such performance asymmetry does not appear to be the norm (Jordan et al . ; Makhrov et al . ).…”

Section: Discussionmentioning

confidence: 99%

“…Hybrid frequency in natural populations varies from 0.01 to 41.5% (Jordan et al . ). Under natural conditions, hybrid frequency is rarely found to be >1% (Matthews et al .…”

Section: Introductionmentioning

confidence: 97%

See 4 more Smart Citations

Morphological and genetic comparison between naturally produced smolts of Atlantic salmon, brown trout and their hybrids

Solem

Berg

Verspoor

et al. 2014

Fisheries Management Eco

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Morphological characters were compared between smolts (standard length 110–220 mm) of Atlantic salmon Salmo salar L., anadromous brown trout Salmo trutta L. and their hybrids captured in River Driva, western Norway. Morphological discrimination between S. salar, S. trutta and their hybrids was correct for 93% of the individuals (correct form was determined genetically). Morphological discrimination of hybrids was incorrect with 9.1% (n = 7) classified as S. salar and 1.3% (n = 1) as S. trutta, suggesting that the hybrids were morphologically more similar to S. salar than S. trutta despite a bias towards S. trutta mothers (7 of 8 cases). The largest morphological differences were found in head (notably maxilla length) and caudal peduncle morphology. Hybrids between S. salar and S. trutta had the longest pectoral and pelvic fins. This indicates that precise discrimination based on morphological traits can be made between S. salar, S. trutta and their hybrids.

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“…In Norway, where the two species cohabit, typical frequencies of 0.24–0.87% have been observed (Hindar & Balstad ), similar to other areas (Jordan et al . ; Makhrov et al . ).…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Hybrid frequency in natural populations varies from 0.01 to 41.5% (Jordan et al . ). Under natural conditions, hybrid frequency is rarely found to be >1% (Matthews et al .…”

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations

Morphological and genetic comparison between naturally produced smolts of Atlantic salmon, brown trout and their hybrids

Solem

Berg

Verspoor

et al. 2014

Fisheries Management Eco

View full text Add to dashboard Cite

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Perspectives: Gene expression in fisheries management

Nielsen

Pavey

2010

Current Zoology

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Functional genes and gene expression have been connected to physiological traits linked to effective production and broodstock selection in aquaculture, selective implications of commercial fish harvest, and adaptive changes reflected in non-commercial fish populations subject to human disturbance and climate change. Gene mapping using single nucleotide polymorphisms (SNPs) to identify functional genes, gene expression (analogue microarrays and real-time PCR), and digital sequencing technologies looking at RNA transcripts present new concepts and opportunities in support of effective and sustainable fisheries. Genomic tools have been rapidly growing in aquaculture research addressing aspects of fish health, toxicology, and early development. Genomic technologies linking effects in functional genes involved in growth, maturation and life history development have been tied to selection resulting from harvest practices. Incorporating new and ever-increasing knowledge of fish genomes is opening a different perspective on local adaptation that will prove invaluable in wild fish conservation and management. Conservation of fish stocks is rapidly incorporating research on critical adaptive responses directed at the effects of human disturbance and climate change through gene expression studies. Genomic studies of fish populations can be generally grouped into three broad categories: 1) evolutionary genomics and biodiversity; 2) adaptive physiological responses to a changing environment; and 3) adaptive behavioral genomics and life history diversity. We review current genomic research in fisheries focusing on those that use microarrays to explore differences in gene expression among phenotypes and within or across populations, information that is critically important to the conservation of fish and their relationship to humans

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Assessing risks of invasion through gamete performance: farm Atlantic salmon sperm and eggs show equivalence in function, fertility, compatibility and competitiveness to wild Atlantic salmon

Yeates

Einum

Fleming

et al. 2014

Evolutionary Applications

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Adaptations at the gamete level (a) evolve quickly, (b) appear sensitive to inbreeding and outbreeding and (c) have important influences on potential to reproduce. We apply this understanding to problems posed by escaped farm salmon and measure their potential to reproduce in the wild. Farm Atlantic salmon (Salmo salar) are a threat to biodiversity, because they escape in large numbers and can introgress, dilute or disrupt locally adapted wild gene pools. Experiments at the whole fish level have found farm reproductive potential to be significant, but inferior compared to wild adults, especially for males. Here, we assess reproductive performance at the gamete level through detailed in vitro comparisons of the form, function, fertility, compatibility and competitiveness of farm versus wild Atlantic salmon sperm and eggs, in conditions mimicking the natural gametic microenvironment, using fish raised under similar environmental conditions. Despite selective domestication and reduced genetic diversity, we find functional equivalence in all farm fish gamete traits compared with their wild ancestral strain. Our results identify a clear threat of farm salmon reproduction with wild fish and therefore encourage further consideration of using triploid farm strains with optimized traits for aquaculture and fish welfare, as triploid fish remain reproductively sterile following escape.

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Mating System and Social Structure

Cited by 9 publications

References 116 publications

Morphological and genetic comparison between naturally produced smolts of Atlantic salmon, brown trout and their hybrids

Morphological and genetic comparison between naturally produced smolts of Atlantic salmon, brown trout and their hybrids

Perspectives: Gene expression in fisheries management

Assessing risks of invasion through gamete performance: farm Atlantic salmon sperm and eggs show equivalence in function, fertility, compatibility and competitiveness to wild Atlantic salmon

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