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Titolo:
Behavioral responses to disturbance in freshwater mussels with implications for conservation and management
Autore:
Waller, DL; Gutreuter, S; Rach, JJ;
Indirizzi:
US Geol Survey, Upper Midw Environm Sci Ctr, La Crosse, WI 54603 USA US Geol Survey La Crosse WI USA 54603 nm Sci Ctr, La Crosse, WI 54603 USA
Titolo Testata:
JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY
fascicolo: 3, volume: 18, anno: 1999,
pagine: 381 - 390
SICI:
0887-3593(199909)18:3<381:BRTDIF>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
NATIVE UNIONID BIVALVES; WATER MUSSELS; COMPLANATA MOLLUSCA; SURVIVAL; REGRESSION; PREDATION; ELLIPTIO; STRATEGY; INVASION; IMPACT;
Keywords:
behavior; conservation; disturbance; freshwater mussel; harvesting; proportional hazards model; proportional odds model; recovery; temperature; Unionidae;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Gutreuter, S US Geol Survey, Upper Midw Environm Sci Ctr, 2630 Fanta Reed Rd, La Crosse, WI 54603 USA US Geol Survey 2630 Fanta Reed Rd La Crosse WI USA 54603 USA
Citazione:
D.L. Waller et al., "Behavioral responses to disturbance in freshwater mussels with implications for conservation and management", J N AMER BE, 18(3), 1999, pp. 381-390

Abstract

Knowledge about the ability of freshwater unionid mussels to recover from physical disturbance is important to their conservation and management. Threatened species may be disturbed by relocation to refugia as a conservationmeasure,and some species are disturbed by size- and species-selective harvesting of shells for use in the production of cultured pearls. The activityof freshwater unionid mussels generally decreases with water temperature, but intra- and interspecific differences in the frequency and distribution of recovery behaviors following disturbances at specific water temperatureshave not been previously quantified. We observed righting, moving, and burrowing behavior of 4 mussel species, Amblema plicata plicata, Potamilus alatus, Fusconaia flava, and Lampsilis cardium, at 3 water temperatures (7, 14and 21 degrees C). The temporal frequency (intensity) and times-to-1st-event of behaviors were analyzed using proportional hazards models. Righting events and consecutive movements occurred at different intensities among temperatures and species. For righting, intensity increased by 8%/degrees C within the range of 7-21 degrees C. Subsequent movements increased in intensity by 10%/degrees C. Amblema plicata was the slowest to respond, and had anintensity of turning upright only 27% of that for P. alatus. The intensities of movements for A. plicata and E. flava were 16% of those for P. alatus. Lampsilis cardium righted themselves most quickly, and had an intensity of righting 124% of that for I! alatus. The distribution of the 3 behaviors among treatment groups at 1 wk was analyzed with a proportional odds model. The distribution of righting, moving, and burrowing 1 wk after disturbancewas described entirely by high-order interactions in our proportional oddsmodel. Therefore, that model revealed little interpretable pattern in the endpoint data and it was less sensitive than our analysis of time-to-event data for measuring the effects of disturbance. We attributed the differencein sensitivity between the 2 models to the greater information content of time-until-event data. For similar studies of occurrences of key events, times to events should be recorded and interpreted whenever feasible and consistent with study objectives, Our results suggest that water temperature has an important effect on the outcome of mussel conservation projects and commercial harvesting activities. Our modeling approach, applied to other species, could help guide decisions about which species can safely be disturbed and the optimal seasonal timing of those disturbances.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 19:10:19