不列颠哥伦比亚黑鳕鱼养殖潜在的经济效益

Potential economic benefits from sablefish farming in British Columbia

本文主要研究不列颠哥伦比亚黑鳕鱼养殖的潜在经济效益。不列颠哥伦比亚一个黑鳕鱼苗种场已经开始了以黑鳕鱼海水网箱养殖为目的苗种培育。这个唯一黑鳕鱼苗种场培育出的鱼苗将有效地支持该地区目前的黑鳕鱼养殖。该地区黑鳕鱼养殖区纯收益如何受2个关键问题影响，（一）如果全球参与黑鳕鱼养殖；（二）如果不列颠哥伦比亚限制了黑鳕鱼的养殖，而其他地区却不限制。我们发现在不列颠哥伦比亚采用落后的水产养殖养殖模式，可能获得低的养殖利润。然而，当生产增长到期望的养殖水平时，黑鳕鱼的养殖利润将迅速下降。如果不列颠哥伦比亚野生黑鳕鱼的溢价控制在至少20—25％，养殖禁令可能对该省和加拿大是有利的。

We present in this paper results of an analysis of the potential economic contribution of sablefish farming in British Columbia （BC） , This is necessary because a BC sablefish hatchery has recently begun production of juvenile sablefish for grow - out in marine net pens. The production from this single hatchery is anticipated to effectively support sablefish production that will match the entire current BC sablefish capture fishery. Two key questions we ad- dress are, how will net benefits （added value） to BC from the sablefish sector be affected if （i） BC and the rest of the world engage in sablefish farnling, and （ii） BC bans sablefish farming while the rest of the world does not. We find that at low BC aquaculture production levels, small economic gains are possible. However, gains quickly disap- pear as production increases towards anticipated levels. A sablefish - farming ban in BC eould be beneficial to the province and Canada if BC wild sablefish landings command a price premium of at least 20 - 25%.