Supplement 1. Data used to estimate mortality rates of winter skate in the southern Gulf of St. Lawrence and on the eastern Scotian Shelf.

File List
EasternScotianShelf_WinterSkate_Zdata.csv
SouthernGulfStLawrence_WinterSkate_Mdata.csv
Description
EasternScotianShelf_WinterSkate_Zdata.csv contains time series of relative abundance for winter skate on the eastern Scotian Shelf. These abundance indices are based on catch
rates in an annual bottom-trawl survey adjusted for size-selectivity as
described in Appendix B. These data were inputs to models used to estimate total mortality rates (Z) of winter skate on the eastern Scotian Shelf (e.g., model 1 in Appendix D). Juv1 is the abundance index for juvenile stage 1, defined as skates 36 – 59 cm in total length (TL). Juv2 is the abundance index for juvenile stage 2 (60 – 74 cm TL). Adult is the abundance index for adult skates (TL 75 cm or more). Checksum values are: Juv1 141.1812435, Juv2 42.48867236, Adult 61.60407165.
SouthernGulfStLawrence_WinterSkate_Mdata.csv contains abundance indices and estimates of discarded catch for winter skate in
the southern Gulf of St. Lawrence as well as potential covariates of natural mortality for this population. The abundance indices are
based on catch rates in an annual bottom-trawl survey adjusted for catchability and availability as described in Appendix B.
These data were inputs to models used to estimate natural mortality rates (M) of winter skate in the southern Gulf of St. Lawrence (e.g., model 2 in Appendix D). Descriptions and checksum values for the columns are:
juv.absD: the abundance index for juvenile skate (TL 21 – 41 cm), scaled to estimated
absolute abundance (millions) at daytime catchability (checksum: 112.0066529).
ad.absD: the abundance index
for adult skate (TL 42 cm or more), scaled to estimated absolute abundance
(millions) at daytime catchability (checksum: 82.28637812).
juv.disc:
discarded catch (millions) of juvenile skate (checksum: 3.873395661).
ad.disc:
discarded catch (millions) of adult skate (checksum: 12.64364398).
seals:
estimated total abundance of grey seals in the
Gulf of St. Lawrence
herd (checksum: 1048800).
lcod:
an index of the relative abundance of large cod (TL 60 cm or more) in the
southern
Gulf
of St. Lawrence, based on mean
catch rates in the annual bottom-trawl survey (checksum: 225.637674).
intemp:
an index of the mean temperature in September in shallow inshore waters of the
southern
Gulf of St. Lawrence
(checksum: 444.01)

文件列表

EasternScotianShelf_WinterSkate_Zdata.csv
SouthernGulfStLawrence_WinterSkate_Mdata.csv

描述

EasternScotianShelf_WinterSkate_Zdata.csv 包含了位于大西洋东部斯科特兰海岸带冬季鳕鱼的相对丰度时间序列数据。这些丰度指数基于年度底层拖网调查的捕获率，并已根据附录B所述的体型选择性进行调整。这些数据是构建模型估算东部斯科特兰海岸带冬季鳕鱼总死亡率（Z）的输入，例如附录D中的模型1。Juv1 为第一龄幼鱼阶段的丰度指数，定义为体长在36至59厘米之间的鳕鱼；Juv2 为第二龄幼鱼阶段的丰度指数（体长60至74厘米）；成年鳕鱼为成年鳕鱼的丰度指数（体长75厘米或更长）。校验值分别为：Juv1 141.1812435，Juv2 42.48867236，成年鳕鱼 61.60407165。

SouthernGulfStLawrence_WinterSkate_Mdata.csv 包含了南部圣劳伦斯湾冬季鳕鱼的丰度指数和丢弃捕获量的估计，以及该种群的自然死亡率潜在协变量。丰度指数基于年度底层拖网调查的捕获率，并已根据附录B所述的捕获能力和可用性进行调整。这些数据是构建模型估算南部圣劳伦斯湾冬季鳕鱼自然死亡率（M）的输入，例如附录D中的模型2。列的描述和校验值如下：

juv.absD：幼鱼丰度指数（体长21至41厘米），已按白天捕获能力估计的绝对丰度（百万为单位）进行缩放（校验值：112.0066529）。
ad.absD：成年鳕鱼丰度指数（体长42厘米或更长），已按白天捕获能力估计的绝对丰度（百万为单位）进行缩放（校验值：82.28637812）。
juv.disc：幼鱼丢弃捕获量（百万为单位）（校验值：3.873395661）。
ad.disc：成年鳕鱼丢弃捕获量（百万为单位）（校验值：12.64364398）。
seals：圣劳伦斯湾群灰色海豹的总估计丰度（校验值：1048800）。
lcod：大西洋鲑（体长60厘米或更长）在南部圣劳伦斯湾的相对丰度指数，基于年度底层拖网调查的平均捕获率（校验值：225.637674）。
intemp：南部圣劳伦斯湾浅岸近海水域9月份平均温度指数（校验值：444.01）。