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040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
0861 |aFs97-4/1428E-PDF
1001 |aGlova, G. J. |q(Gordon John), |d1939- |eauthor.
24510|aInteractions for food and space between sympatric populations of underyearling coho salmon and coastal cutthroat trout in a stream simulator during summer / |cby G.J. Glova and J.C. Mason.
264 1|aNanaimo, British Columbia : |bPacific Biological Station, Fisheries and Marine Service, Department of Fisheries and the Environment, |cJuly 1977.
300 |a1 online resource (iii, 36 pages) : |billustrations, graphs
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aFisheries and Marine Service manuscript report ; |v1428
500 |aDigitized edition from print [produced by Fisheries and Oceans Canada].
504 |aIncludes bibliographical references (pages 12-13).
5203 |aInteractions for food and space between sympatric populations of underyearling coho salmon and coastal cutthroat trout were investigated in a stream simulator during summer. In sympatry, partitioning of space was rapid and similar to that in nature, in that coho numerically dominated pools and trout dominated riffles. In allopatry, their microhabitat use was similar, in that 60-75% of either species occupied pools. Factorial analyses of variance indicated that size of fish, simulated food supply and water velocity were ranked (high to low) as affecting microdistribution. Coho and cutthroat trout fry communicated using an array of similar body postures and movements, with chases, nips and lateral displays comprising more than 80% of their total aggressive activity. Non-contact behaviors were more frequently used by coho; nipping was more frequently used by trout. Both salmonids were most aggressive when food was present. Species levels of aggressiveness were similar in allopatry, but differed between habitat types in sympatry, coho being more inclined to defend pools and trout riffles. Stream management strategy should take into account the importance of maintaining habitat diversification in streams supporting sympatric populations of coho salmon and cutthroat trout.
546 |aIncludes abstracts in English and French.
650 0|aCoho salmon|xEcology.
650 0|aCoastal cutthroat trout|xEcology.
650 6|aSaumon coho|xÉcologie.
650 6|aTruite fardée côtière|xÉcologie.
655 7|aTechnical reports|2lcgft
655 7|aRapports techniques|2rvmgf
7001 |aMason, J. C. |q(John Christopher), |d1932- |eauthor.
7101 |aCanada. |bFisheries and Marine Service, |eissuing body.
7102 |aPacific Biological Station (1972- ), |eissuing body.
830#0|aManuscript report (Canada. Fisheries and Marine Service)|vno. 1428.|w(CaOODSP)9.924185
85640|qPDF|s1.03 MB|uhttps://publications.gc.ca/collections/collection_2023/mpo-dfo/fs97-4/Fs97-4-1428-eng.pdf