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Titolo:
Open-ocean orientation and return migration routes of chum salmon based ontemperature data from data storage tags
Autore:
Friedland, KD; Walker, RV; Davis, ND; Myers, KW; Boehlert, GW; Urawa, S; Ueno, Y;
Indirizzi:
Univ Massachusetts, NOAA, CMER Program, Amherst, MA 01003 USA Univ Massachusetts Amherst MA USA 01003 ER Program, Amherst, MA 01003 USA Univ Washington, Sch Aquat & Fishery Sci, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 & Fishery Sci, Seattle, WA 98195 USA Natl Marine Fisheries Serv, SW Fisheries Sci Ctr, Pacific Fisheries Environm Lab, Pacific Grove, CA 93950 USA Natl Marine Fisheries Serv Pacific Grove CA USA 93950 Grove, CA 93950 USA Natl Salmon Resources Ctr, Sapporo, Hokkaido 0620922, Japan Natl Salmon Resources Ctr Sapporo Hokkaido Japan 0620922 o 0620922, Japan Fisheries Agcy Japan, Tohoku Natl Fisheries Inst, Hachinohe Branch, Hachinohe 0310841, Japan Fisheries Agcy Japan Hachinohe Japan 0310841 h, Hachinohe 0310841, Japan
Titolo Testata:
MARINE ECOLOGY-PROGRESS SERIES
, volume: 216, anno: 2001,
pagine: 235 - 252
SICI:
0171-8630(2001)216:<235:OOARMR>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
RIVER SOCKEYE-SALMON; PACIFIC SALMON; VERTICAL MOVEMENTS; ONCORHYNCHUS-NERKA; ATLANTIC SALMON; COMPUTER-SIMULATIONS; MAGNETIC ORIENTATION; COMPASS ORIENTATION; BRITISH-COLUMBIA; RAINBOW-TROUT;
Keywords:
chum salmon; data storage tag; orientation; migration;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Friedland, KD Univ Massachusetts, NOAA, CMER Program, Blaisdell House, Amherst, MA 01003USA Univ Massachusetts Blaisdell House Amherst MA USA 01003 3USA
Citazione:
K.D. Friedland et al., "Open-ocean orientation and return migration routes of chum salmon based ontemperature data from data storage tags", MAR ECOL-PR, 216, 2001, pp. 235-252

Abstract

Temperature data storage tags were applied to maturing chum salmon Oncorhynchus keta in the Bering Sea during summer 1998, 5 of which were recovered in the coastal waters around Japan. These tags recorded water temperatures experienced by the fish for periods of 62 to 118 d at resolutions of 15 to 30 min, We considered fine-scale aspects of the data by analyzing diel temperature patterns in regard to the migration behavior and orientation of thefish. During the night, temperatures experienced by the fish changed little, and were among the highest temperatures experienced whereas daytime temperatures often showed dramatic changes as the fish changed depth. We analyzed a time series of temperature differences between sunrise and sunset as an indication of progress made by the fish against horizontal thermal gradients, which was assumed to represent changes in latitudinal position. Daytime differences were positive when the fish were migrating to warmer waters, whereas night-time differences were zero or slightly negative, This suggests that the fish made more progress migrating during the day than at night. We also considered large-scale aspects by examining oceanographic data in relation to the temperatures recorded by the tags. Analysis of possible migration routes based on large-scale patterns of sea surface temperature distributions suggests that zonal (east-west) routes are preferred. These data support the hypothesis that chum salmon utilize orientation cues associated with the sun during open ocean migration. However, whether salmon also utilize additional orientation or navigation mechanisms remains to be determined.

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Documento generato il 04/04/20 alle ore 12:05:51