Blue crab (Callinectes sapidus) population structure in southern New England tidal rivers: Patterns of shallow-water, unvegetated habitat use and quality.
Blue crab (Callinectes sapidus) population structure in southern New England tidal rivers: Patterns of shallow-water, unvegetated habitat use and quality.
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DOI：
10.1007/s12237-020-00867-1
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发表时间：
2021-07
期刊：
影响因子：
--
通讯作者：
Fehon MM
中科院分区：
文献类型：
--
作者：
Taylor DL;Fehon MM
蓝蟹的地理分布广泛，包括美国东部和墨西哥湾的沿海水域，但在北纬地区缺乏种内栖息地利用和质量模式。这项研究调查了Seekonk河和Taunton河(美国罗德岛和马萨诸塞州)的蓝蟹种群结构：这两条受潮汐影响的河流与纳拉甘西特湾河口相连，以浅水、无植被的栖息地为主。从2012年5月到8月，每两周收集一次螃蟹(2012-2016)，并使用基于丰度和生长的指标来评估河边栖息地的使用和质量。这些指标还根据蟹的生活史特征和原位非生物条件进行了分析，以阐明个体发育过程中栖息地选择的模式。采集了甲壳宽度为8~185 mm(CW；n=2,577)的螃蟹，春季和夏季有两个不同的龄级占据河流(最大丰度~5只/10m2)。幼龄-0+群体在数量上占优势(约占总捕获量的88%)，并由雄蟹和幼蟹组成(平均±SD丰度=0.28±0.26雄/10m2和0.14±0.12幼蟹/10m2)。雄蟹以雄蟹为主(约占队列的83%)，但也有性成熟雌蟹(占队列的9%；平均±SD丰度=0.04±0.06成年雌性/100m2；50%成熟期大小±95CI=129.0±0.2mmCW)。蟹类在空间上沿盐度梯度分布，雄蟹和幼蟹多集中在少盐度水域(上游盐度~5ppt)，成年雌性蟹主要集中在盐度较高的地区(中下游盐度~11~21ppt)。蟹类丰度的季节和年际模式也因性别和个体发育而不同。雄鱼和幼鱼的捕捞高峰出现在春季和盛夏，年丰度与溶解氧(DO)浓度呈正相关。相比之下，成熟雌性在8月和水温较高的年份最多。幼蟹的绝对和相对生长速率分别为0.9±0.3 mm CW/d和1.5±0.6%CW/d，并与DO水平直接相关。对广泛地理范围内螃蟹丰度和生长的天气调查表明，浅水、无植被的栖息地目前是新英格兰南部潮汐河流的功能性托儿所。
The blue crab, Callinectes sapidus, has a broad geographic distribution encompassing coastal waters of the eastern United States and Gulf of Mexico, but intraspecific patterns of habitat use and quality are lacking at northern latitudes. This study examined the population structure of blue crabs in the Seekonk and Taunton Rivers (Rhode Island and Massachusetts, USA): two tidally influenced rivers contiguous with the Narragansett Bay Estuary and dominated by shallow-water, unvegetated habitats. Crabs were collected fortnightly from May through August (2012-2016), and abundance- and growth-based metrics were used to assess riverine habitat use and quality. These metrics were also analyzed with respect to crab life history traits and in situ abiotic conditions to elucidate patterns of habitat selection throughout ontogeny. Crabs measuring 8 to 185 mm carapace width (CW; n = 2,577) were collected, and two distinct age-classes occupied the rivers during the spring and summer (maximum abundance ~ 5 crabs/10 m2). The younger age-0+ cohort was numerically dominant (~ 88% of total catch) and comprised of male and juvenile female crabs (mean ± SD abundance = 0.28 ± 0.26 males/10 m2 and 0.14 ± 0.12 juvenile females/10 m2). Males accounted for the majority of age-1+ crabs (~ 83% of cohort), yet sexually mature females were also observed (9% of cohort; mean ± SD abundance = 0.04 ± 0.06 adult females/100 m2; size at 50% maturity ± 95 CI = 129.0 ± 0.2 mm CW). Crabs were spatially segregated along a salinity gradient with males and juvenile females prevalent in oligohaline waters (upper river salinity ~ 5 ppt) and adult females mainly concentrating in higher salinity areas (mid- and lower river salinity ~ 11-21 ppt). Seasonal and interannual patterns in crab abundance also differed by sex and ontogeny. Peak catches of males and juvenile females occurred during the spring and mid-summer, and annual abundances were positively related to dissolved oxygen (DO) concentrations. In contrast, mature females were most abundant during August and years with elevated water temperatures. The absolute and relative growth rates of juvenile crabs equaled 0.9 ± 0.3 mm CW/day and 1.5 ± 0.6 % CW/day, respectively, and were directly related to DO levels. A synoptic examination of crab abundance and growth across a broad geographic range indicated that shallow-water, unvegetated habitats presently serve as functional nurseries in southern New England tidal rivers.
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DOI：
10.1016/j.jembe.2015.06.003
发表时间：
2015-10-01
影响因子：
2
作者：
Brill, Richard W.;Bushnell, Peter G.;Small, Hamish J.
通讯作者：
Small, Hamish J.
影响因子：
2
作者：
BURKE, JS
通讯作者：
BURKE, JS
影响因子：
2.5
作者：
Clark, ME;Wolcott, TG;Hines, AH
通讯作者：
Hines, AH
影响因子：
2.4
作者：
Collie, Jeremy S.;Wood, Anthony D.;Jeffries, H. Perry
通讯作者：
Jeffries, H. Perry
影响因子：
2.7
作者：
Bauer, Laurie J.;Miller, Thomas J.
通讯作者：
Miller, Thomas J.