000 02594cam  2200325za 4500
0019.806350
003CaOODSP
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008150406s2000    oncd    ob   f000 0 eng d
040 |aCaOODSP|beng
041 |aeng|bfre
043 |an-cn---
0861 |aFs70-1/2000-167E-PDF
1001 |aZhang, Z.|q(Zi-Yang)
24510|aEvaluation of horse clam stock dynamics for a directed subtidal horse clam (Tresus capax and Tresus nuttallii) fishery in British Columbia |h[electronic resource] / |cZ. Zhang and A. Campbell.
260 |aOttawa : |bFisheries and Oceans Canada, |c2000.
300 |a54 p. : |bfig., graphs, tables.
4901 |aCanadian Stock Assessment Secretariat research document, |x1480-4883 ; |v2000/167
504 |aIncludes bibliographic references (p. 22-24).
520 |aBiological information essential for addressing ecological concerns, assessing population stock dynamics, and evaluating fishing strategies for a directed fishery proposed for horse clams were examined. The depth distribution of horse clams appeared to extensively overlap with geoducks in the subtidal zones. The possible detrimental effect caused by horse clam exploitation on geoduck populations is, at present, unknown and should be examined in the future. The current depth restriction for horse clam and geoduck fishing, which is shallower than 10 feet below chart datum, appears to be inadequate to sufficiently protect the eelgrass habitat in some areas. A general survey protocol was outlined for obtaining biological and ecological information, such as horse clam biomass, natural mortality rate, growth, and eelgrass distribution. A computer stochastic model was developed to evaluate the effect of alternative fishing schemes and exploitation rates on the reproduction potential of horse clam populations, based on known natural mortality and growth rates and age at vulnerability of fishing. Highly precautionary biological reference points were recommended for the initial phase of the directed fishery.
69207|2gccst|aFisheries resources
69207|2gccst|aMolluscs
69207|2gccst|aFishing area
69207|2gccst|aFisheries management
7001 |aCampbell, Alan,|d1944-
7101 |aCanada. |bDepartment of Fisheries and Oceans.
7102 |aCanada.|bCanadian Stock Assessment Secretariat.
830#0|aCanadian Stock Assessment Secretariat research document,|x1480-4883 ; |v2000/167|w(CaOODSP)9.507740
85640|qPDF|s2.37 MB|uhttps://publications.gc.ca/collections/collection_2015/mpo-dfo/Fs70-1-2000-167-eng.pdf