Trends in Relative Abundance and Early Life Survival of Atlantic Menhaden during 1977-2013 from Long-Term Ichthyoplankton Programs

被引：13

作者：

Simpson, Cara A. ^{[1
]}

Wilberg, Michael J. ^{[1
]}

Bi, Hongsheng ^{[1
]}

Schueller, Amy M. ^{[2
]}

Nesslage, Genevieve M. ^{[1
]}

Walsh, Harvey J. ^{[3
]}

机构：

[1] Univ Maryland, Ctr Environm Sci, Chesapeake Biol Lab, POB 38, Solomons, MD 20688 USA

[2] NOAA, Natl Marine Fisheries Serv, Southeast Fisheries Sci Ctr, Beaufort Lab, 101 Pivers Isl Rd, Beaufort, NC 28516 USA

[3] NOAA, Natl Marine Fisheries Serv, Northeast Fisheries Sci Ctr, Oceanog Branch, 28 Tarzwell Dr, Narragansett, RI 02882 USA

来源：

TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY | 2016年 / 145卷 / 05期

基金：

美国海洋和大气管理局;

关键词：

BREVOORTIA-TYRANNUS; LARVAL TRANSPORT; CHESAPEAKE BAY; POPULATION-STRUCTURE; CONTINENTAL-SHELF; SAMPLING DESIGNS; DELAWARE BAY; TAG RETURNS; FISH; RECRUITMENT;

D O I：

10.1080/00028487.2016.1201004

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

The Atlantic Menhaden Brevoortia tyrannus, a commercially important clupeid, supports one of the oldest and largest commercial fisheries on the U.S. East Coast. Despite recent increases in adult biomass, juvenile indices have declined coastwide and have remained particularly low in Chesapeake Bay. In order to understand the underlying causes of this decline, knowledge of larval recruitment is essential. We developed an index of larval abundance by using larval data collected from two large-scale ichthyoplankton sampling programs that occurred from Nova Scotia, Canada, to Cape Hatteras, North Carolina, during 1977-1987 and 1999-2013. Larval abundance data were standardized to a day-0 age by applying an age-length key from a study of larval ingress into Chesapeake Bay; a delta-lognormal model was used to account for spatial and temporal changes in sampling. We found that Atlantic Menhaden larval abundance increased from 1977 to 2013 and was highest in the winter; most individuals were detected at nearshore stations. Over our time series, larval abundance corresponded closely to adult spawning stock biomass. Due to the lack of a direct relationship between our larval abundance estimates and a coastwide juvenile index, we examined several environmental factors (temperature, Chesapeake Bay discharge, Atlantic Multidecadal Oscillation [AMO], wind speed, and wind direction) for potential effects on the relative survival of larvae. Larval abundance had a significant negative effect on relative survival. Temperature and to a lesser extent wind speed and AMO appeared to exert the greatest effects on the early life survival of Atlantic Menhaden: cooler temperatures, intermediate wind speeds, and negative-phase AMO were the most favorable for survival. Our findings suggest that the observed reduction in recruitment is not a problem of larval supply but rather is limited by survival between the larval and juvenile stages.

引用

页码：1139 / 1151

页数：13