Journal of Fish Biology

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Allozyme evidence for reproductively isolated sympatric populations of brown trout Salmo trutta L. in Lough Melvin, Ireland
Journal of Fish Biology - Tập 18 Số 6 - Trang 629-642 - 1981
A. Ferguson, FRANCIS MASON
Electrophoretic studies of five polymorphic enzyme loci (G‐3‐PDH‐2, LDH‐I, LDH‐5, PGI‐2, PGI‐3) in brown trout from Lough Melvin in northwestern Ireland have demonstrated that the morphotypes known by the vernacular names of ‘ferox’, ‘gillaroo’ and ‘sonaghen’, are not merely ecophenotypes but represent genetically distinct and reproductively isolated populations....... hiện toàn bộ
Population structure, ecological segregation and reproduction in non‐anadromous Arctic charr, Salvelinus alpinus (L), in four unexploited lakes in the Canadian high Arctic
Journal of Fish Biology - Tập 38 Số 1 - Trang 123-147 - 1991
Henry H. Parker, Lionel Johnson
Land‐locked populations of Arctic charr in four lakes on Northern Ellesmere Island (80° N) were found to consist of two distinct sizes: ‘dwarf’ and ‘normal’ charr. Both groups attained sexual maturity but differed in appearance and habitat. The smaller fish, occupying the more marginal habitats, retained their parr‐markings; the larger group had the general characteristics of smolts, being...... hiện toàn bộ
The application of molecular markers to the study and conservation of fish populations, with special reference to Salmo
Journal of Fish Biology - Tập 47 Số sA - Trang 103-126 - 1995
A. Ferguson, John B. Taggart, Paulo A. Prodöhl, O. M. McMeel, Paul M. Thompson, C. Stone, Philip McGinnity, R. A. Hynes
The main molecular techniques which can be used to generate genetic markers, and the applications of these markers to studies of fish populations are outlined. Published and ongoing studies, in the authors' laboratories, on brown trout and Atlantic salmon are used to compare the resolution and applicability of allozyme, mitochondrial DNA and minisatellite (variable number of tandem repeats...... hiện toàn bộ
The influence of piscivory on life history traits of brown trout
Journal of Fish Biology - Tập 55 Số 6 - Trang 1129-1141 - 1999
Nina Jönsson, Tor F. Næsje, Bror Jönsson, Randi Saksgård, Odd Terje Sandlund
Brown trout in Lake Femund migrated from the nursery streams mainly at 2 years old, but ranging between 1 and 8 years. Brown trout switched to piscivory from 3 years onwards, and a body length of 17·5 cm, according to back calculation from scales. Fast growers switched to piscivory at a younger age and smaller size than slow growers. The most slow‐growing trout switched to fish feeding at ...... hiện toàn bộ
Variation in mitochondrial DNA and post‐glacial colonization of north western Europe by brown trout
Journal of Fish Biology - Tập 48 Số 1 - Trang 54-67 - 1996
R. A. Hynes, A. Ferguson, Mella McCann
A purified mitochondrial DNA (mtDNA) probe was used to examine restriction fragment length polymorphisms produced by six restriction enzymes (Xba I, Eco RV, Ava II, HinfI, Hae III, Mbo I) in 915 brown trout from western Europe. A ...... hiện toàn bộ
Piscivory by brown trout Salmo trutta L. and Arctic charr Salvelinus alpinus (L.) in Norwegian lakes
Journal of Fish Biology - Tập 41 Số 1 - Trang 91-101 - 1992
Jan Henning L'Abée‐Lund, Arnfinn Langeland, Harald Sægrov
Size and frequency of occurrence of prey of brown trout Salmo trutta L. and Arctic charr Salvelinus alpinus (L.) were recorded in 13 Norwegian lakes during 1973–1990. Piscivores usually comprised less than 5% of the total population. Arctic charr were less piscivorous than brown trout. Trout and charr became piscivorous at 13 and 16 cm ...... hiện toàn bộ
Ferox trout, Salmo trutta L., and chair,*Salvelinm alpinus (L.), in Scottish lochs
Journal of Fish Biology - Tập 14 Số 1 - Trang 1-29 - 1979
R. N. Campbell
Although the ferox of Scottish Highland lochs (lakes) have long captured the interest of both laymen and scientists, no previous investigation of their biology or ecology has been undertaken. This paper is based on 141 ferox from 22 lochs collected during the last 22 years and the results from a recent investigation into their status and distribution. When the features of their environment...... hiện toàn bộ
Post‐glacial colonization of brown trout, Salmo trutta L.: Ldh‐5 as a phylogeographic marker locus
Journal of Fish Biology - Tập 35 Số 5 - Trang 651-664 - 1989
K. E. Hamilton, A. Ferguson, John B. Taggart, Tumi Tómasson, A. F. Walker, Edward Fahy
The Ldh‐5 locus, which codes for the eye‐specific lactate dehydrogenase in brown trout, has been shown to be polymorphic for two codominant alleles, Ldh‐5 (100) and Ldh‐5 (90). The Ldh‐5 (100) allele is present in 11 other salmonid species and is therefore likely to be the ancestral one, whereas the unique bro...... hiện toàn bộ
Natural disturbance and life history: consequences of winterkill on fathead minnow in boreal lakes
Journal of Fish Biology - Tập 68 Số 3 - Trang 681-694 - 2006
Andy J. Danylchuk, William M. Tonn
Age, growth and reproductive characteristics of fathead minnow Pimephales promelas populations inhabiting four lakes that varied in the extent and frequency of winterkill were studied in the boreal region of western Canada. The lifespan of fathead minnows inhabiting lakes prone to winterkill was 1–2 years shorter than those in less disturbed lakes. In populations...... hiện toàn bộ
Population changes within a group of fish species in Lake Tanganyika following their exploitation
Journal of Fish Biology - Tập 2 Số 4 - Trang 329-353 - 1970
G. W. Coulter
Pelagic fish populations in Lake Tanganyika consist mainly of two small clupeid species and four centroponiid species which prey on them. Exploitation with purse‐seines began in the southeast arm in 1962 and catches were sampled up to early 1969. Inshore clupeid populations were also sampled with a scoop‐net (lusenga of the kind used in the traditional inshore fishery.Clup...... hiện toàn bộ
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