Population Characteristics of Adult Atlantic Sturgeon Captured by the Commercial Fishery in the Saint John River Estuary, New Brunswick

doi:10.1080/00028487.2016.1264473

	Population Characteristics of Adult Atlantic Sturgeon Captured by the Commercial Fishery in the Saint John River Estuary, New Brunswick
	Dadswell, Michael J.1; Ceapa, Cornel 2; Spares, Aaron D.1; Stewart, Nathan D.1; Curry, R. Allen 3; Bradford, Rodney G.4; Stokesbury, Michael J. W.1
刊名	TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY
	2017-03
卷号	146 期号:2 页码:318-330
ISSN号	0002-8487
DOI	10.1080/00028487.2016.1264473
英文摘要	The commercial fishery for Atlantic Sturgeon Acipenser oxyrinchus in the Saint John River, New Brunswick, began in 1880. The early fishery was unregulated, and the adult stock was depleted by 1886 after landings of 712 metric tons. After a 10-year closure the fishery was reopened in 1897 with management regulations, and landings varied from 6 to 20 metric tons/year until 2010. In 2011 an annual quota of 350 adults was established and landings are now stable at 11.3 +/- 1.7 (mean +/- SD) metric tons/year. Since 2009, fishers have collected biological statistics from adults taken in the fishery and 14-60% of captured individuals have been marked and released each year. During 2009-2015, annual mean values of total length and dressed weight of landed adults were stable, the male : female sex ratio was 1.2:1.0, and mean age of males and females was 27.2 and 34.0 years, respectively. Estimates of instantaneous total mortality ranged from 0.08 to 0.11, and mean annual survival was 90.9%. Of 1,396 marked adults released, 147 were recaptured in the estuary in subsequent years. Tag returns indicated that the modal spawning periodicity of males was 2 years and that of females was 4 years. Valid, modified Schnabel and Jolly-Seber mean annual population estimates for 2013-2015 were 18,179 and 20,798 adults, respectively. The quota in relation to these estimated adult populations represented annual exploitation rates of 1.9% and 1.7%, which are below F50 and would maintain present stock size. The virgin adult population was determined using 1880-1886 total landings and a mean weight range for adults of 50-30 kg. Estimated range of the 1880 virgin population size was 14,240-23,733 adults. These data suggest that the fishery is sustainable at its current annual yield and that the population is near the carrying capacity of the Saint John River.
WOS研究方向	Fisheries
语种	英语
出版者	WILEY
WOS记录号	WOS:000489650300005
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/30166]
专题	自然资源部第一海洋研究所
通讯作者	Dadswell, Michael J.
作者单位	1.Acadia Univ, Dept Biol, 33 Westwood Ave, Wolfville, NS B4P 2R6, Canada 2.Acadian Sturgeon & Caviar Ltd, 30 Carters Wharf Rd, Carters Point, NB E5S 1S5, Canada 3.Univ New Brunswick, Canadian Rivers Inst, Biol Forestry & Environm Management, POB 4400, Fredericton, NB E3B 5E3, Canada 4.Fisheries & Oceans Canada, Bedford Inst Oceanog, 1 Challenger Dr, Dartmouth, NS B2Y 4A2, Canada
推荐引用方式 GB/T 7714	Dadswell, Michael J.,Ceapa, Cornel,Spares, Aaron D.,et al. Population Characteristics of Adult Atlantic Sturgeon Captured by the Commercial Fishery in the Saint John River Estuary, New Brunswick[J]. TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY,2017,146(2):318-330.
APA	Dadswell, Michael J..,Ceapa, Cornel.,Spares, Aaron D..,Stewart, Nathan D..,Curry, R. Allen.,...&Stokesbury, Michael J. W..(2017).Population Characteristics of Adult Atlantic Sturgeon Captured by the Commercial Fishery in the Saint John River Estuary, New Brunswick.TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY,146(2),318-330.
MLA	Dadswell, Michael J.,et al."Population Characteristics of Adult Atlantic Sturgeon Captured by the Commercial Fishery in the Saint John River Estuary, New Brunswick".TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY 146.2(2017):318-330.