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首页> 外文期刊>Journal of Northwest Atlantic Fishery Science >Rebuilding the Stock of Northeast Arctic Greenland Halibut (Reinhardtius hippoglossoides)
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Rebuilding the Stock of Northeast Arctic Greenland Halibut (Reinhardtius hippoglossoides)

机译：重建东北北极格陵兰大比目鱼（Reinhardtius hippoglossoides）的种群

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After the absence of 1989–1994 year classes of Northeast Arctic Greenland halibut (Reinhardtius hippoglossoides) in regular surveys, an annual survey programme was initiated in 1996 to map juveniles in previously unsurveyed waters north and east of Svalbard. After rather stable juvenile indices in the first years, the recruitment indices have increased tenfold from 2001 to 2006. The increase in juvenile Northeast Arctic (NEA) Greenland halibut corresponded with an increase in spawning stock biomass. The swept area abundance estimates of spawning females (i.e., females >60 cm), has nearly tripled since 1996 having achieved 29 000 t in recent years. This improvement occurred after years of strong regulations, introduced in 1992, by enforcing a moratorium on the targeted offshore fishery and strict bycatch regulations for the species. Regulations were introduced after a dramatic change in stock status for the NEA Greenland halibut during the 1980s. Females >75 cm contributed more to the stock’s total egg production (TEP) in more recent years. The contribution from these larger females increased from 10% of the TEP estimate in 1996 to 21% in 2006. The results from the present study indicate that rebuilding Greenland halibut stocks takes time, and that at least 12–15 years with restrictions are needed to recover from the low levels observed in the Barents Sea in the beginning of the 1990s.
机译：在没有定期调查的1989-1994年东北北极格陵兰大比目鱼（Reinhardtius hippoglossoides）等级之后，1996年启动了一项年度调查计划，以绘制斯瓦尔巴特群岛以北和东部未经调查的水域中的未成年人的地图。在第一年的少年指数相当稳定之后，招聘指数从2001年到2006年增加了十倍。少年东北北极（NEA）格陵兰大比目鱼的增加与产卵生物量的增加相对应。自1996年以来，产卵雌性（即雌性> 60厘米）的横扫面积丰度估计值几乎翻了三倍，近年来达到了29 000吨。这种改进是在1992年实行了多年的严格法规之后实施的，该措施是强制实施针对目标远洋渔业的禁令和对该物种的严格兼捕法规。在1980年代NEA格陵兰大比目鱼的存量状况发生巨大变化之后，制定了法规。近年来，> 75厘米的雌性对母鸡的总产卵量（TEP）的贡献更大。这些较大雌性的贡献从1996年TEP估计值的10％增加到2006年的21％。本研究的结果表明，重建格陵兰大比目鱼种群需要时间，并且至少需要12-15年的限制从1990年代初在巴伦支海发现的低水平中恢复过来。

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