EurekaMag.com logo
+ Site Statistics
References:
48,253,228
Abstracts:
22,798,842
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
EurekaMag PDF Full Text Supply ServicePDF Full Text Supply Service
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn
Follow on LinkedInFollow on Tumblr

+ Translate

Can experimental manipulation be used to determine the cause of the decline of western stock of Steller sea lions Eumetopias jubatus?


, : Can experimental manipulation be used to determine the cause of the decline of western stock of Steller sea lions Eumetopias jubatus?. Unknown

A variety of reasons have been postulated for the decline of Steller sea lions (Otariidae: Eumetopias jubatus) in the Northeast Pacific. To date, however, it has proved impossible to distinguish among these reasons given the available data. In principle, experimental management based on spatial replication of treatments could be used to discriminate among some of these hypotheses. A simulation protocol was developed and applied to evaluate the power of a set of potential experiments to distinguish between whether the cause of the decline was fishing-induced or due to other factors. The simulations are based on an operating model that is individual-based and spatially explicit, and can be parameterized to represent the implications of a range of possible causes for the decline. This model can be used to generate the types of data typically available for the western stock of Steller sea lions. Experiments based on splitting four of the regions identified for past analyses of population dynamics in-formation into sectors that are either open to some fishing or completely closed are considered. The performance of these experiments is, however, poor, owing to the impact of movement, different historical trends in different areas, demographic stochasticity, and the likely size of the effect that the experiments are attempting to detect. These results suggest that the currently available information imply that large-scale experimental manipulation by means of additional spatial closures, where the results are analyzed by examining trends in pup counts, is unlikely to provide an effective means of discriminating among alternative hypotheses for the decline in Steller sea lions in Alaska.

(PDF 0-2 workdays service)

Order PDF Full Text

Close
Close

Click here to order any other PDF Full Text


Accession: 038040432

PDF Full Text: Submit


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Other references

La Rosée, A.; Häder, T.; Taubert, H.; Rivera-Pomar, R.; Jäckle, H., 1997: Mechanism and Bicoid-dependent control of hairy stripe 7 expression in the posterior region of the Drosophila embryo. Pair-rule gene hairy (h) expression in seven evenly spaced stripes, along the longitudinal axis of the Drosophila blastoderm embryo, is mediated by a modular array of separate stripe enhancer elements. The minimal enhancer element, which generates...

HAAB, P.; DUE, G.; STUCKI, R.; PIIER, J., 1964: Gas Exchange In Hypoxia And Oxygen Diffusion Capacity In The Anesthetized Dog. Helvetica Physiologica et Pharmacologica Acta 22: 203-227

Beck, C.; Barthel, F.; Hahn, A-Maria.; Vollmer, C.; Bauer, I.; Picker, O., 2014: Evaluation of a new side-stream, low dead space, end-tidal carbon dioxide monitoring system in rats. The aim of this study was to evaluate a newly developed infrared side-stream capnograph with minimal sample volume for the continuous measurement of end-tidal carbon dioxide (CO2) concentrations in small rodents. Thirty-four male Wistar rats (weig...

Reeves, N. P., 1995: Vaccination against naturally occurring FIP in a single large cat shelter. 254 cats, that were vaccinated twice intranasally at 4-week interval with feline peritonitis virus live vaccine (Primucell FIP) before entering a cat shelter, had a 75% reduced incidence of feline infectious peritonitis over the subsequent 16 mont...

Kanowitz, A.; Dunn, T.M.; Kanowitz, E.M.; Dunn, W.W.; Vanbuskirk, K., 2006: Safety and effectiveness of fentanyl administration for prehospital pain management. To determine the safety and effectiveness of fentanyl administration for prehospital pain management. This was a retrospective chart review of patients transported by ambulance during 2002-2003 who were administered fentanyl citrate in an out-of-h...

Thelander, H.E., 1965: The Fetus and Its Environment. California Medicine 102(1): 77-77

Miyake, H., 1965: Electrophysiological studies on the action of chlordiazepoxide in cats. Seishin Shinkeigaku Zasshi 67(10): 992-1004

Glawe Lloyd N.; Bailey Alan M., 2000: Paleoenvironments and early diagenesis of Paleocene Wilcox Tew Lake marker beds. The Tew Lake Marker beds are a thin (10-12 ft or 3-4 m thick), distinctive - sequence of calcareous shales that occur within the predominantly noncarbonate Middle Wilcox delta deposits of east-central Louisiana. These beds are named after the Tew...

Jin; Kang; Wang; Hu; Jiang, 1996: Coupled optical interface modes in a Fibonacci dielectric superlattice. Physical Review. B, Condensed Matter 54(17): 11883-11886

Kock, L., 1986: Sward quality of the greens of the Rinn-Innsbruck Golf Course in the foothills of the Alps after ten years of use. The sward composition after 10 years of play consisted of 45-90% Agrostis species, 7-50% Poa annua + Poa supina and 2-15% Sagina procumbens; only some greens had other species covering 1-10% of the green area. The original composition was 100% Agr...