Recovery and status of shortnose sturgeon in the Hudson River

Shortnose sturgeon (Acipenser brevirostrum), an endangered species, has experienced a several-fold increase in abundance in the Hudson River in recent decades. This population growth followed a substantial improvement in water quality during the 1970s to a large portion (c. 40%) of the species' summertime nursery area. Age structure and growth were investigated to evaluate the hypothesis that improvements in water quality stimulated population recovery through increased survival of young of the year juveniles. Specimens were captured using gill nets bi-monthly from November 2003 to November 2004 (n = 596). Annuli in fin spine sections were used to generate estimates of sturgeon age. Based upon a marginal increment analysis, annuli were determined to form at an annual rate. Age determinations yielded a catch composed of age 5-30 years for sizes 49-105cm Total Length (n = 554). Individual growth rate (von Bertalanffy coefficients: TL, = 1045mm, K = 0.07) for the population was similar to previous growth estimates within the Hudson River as well as proximal estuaries. Hindcast year-class strengths, based upon a recent stock assessment (Bain et al. 2000) and corrected for gill net mesh selectivity and cumulative mortality indicated high recruitments (28,000-43,000 yearlings)during 1986-1992, which were preceded and succeeded by c.5-year periods of lower recruitment (5,000-1 5,000 yearlings). Recruitment patterns were corroborated by trends in shortnose sturgeon bycatch from a Hudson utilities-sponsored monitoring program. Results indicated that Hudson River shortnose sturgeon abundance increased due to the formation of several strong year-classes occurring about five years subsequent to improved water quality in important nursery and forage habitats in the upper Hudson River estuary. (PDF contains 108 pages.)

Printed blank from the New York Central and Hudson River Railroad Express Freight Line, New York for shipping packages of brackets and racks to S.D. Woodruff of St. Catharines

Printed blank from the New York Central and Hudson River Railroad Express Freight Line, New York for shipping packages of brackets and racks to S.D. Woodruff of St. Catharines. This document is signed by R.L. Crawford, agent, Aug.11, 1876.

Drainage basins of streams entering the Hudson River in Orange, Ulster, Dutchess and Putnam Counties, except Rondout Creek below Rondout Reservoir, Esopus Creek below Ashokan Reservoir, Wappinger Creek, and waters contained within boundaries of State-owned forest preserve lands; official classifications.

Cover title.

Upper Hudson River drainage basin survey series. Report[s.]

no.1. Hoosic River drainage basin: surface waters.--no.2. Upper Hudson River drainage basin except Hoosic River drainage basin.

Lower Hudson River series. Report[s].

Cover title.

Final environmental impact statement : proposed estuarine sanctuary grant award to the state of New York for a Hudson River estuarine sanctuary /

"August 1982."

The Hudson River Bridge at New York.

Cover-title.

Waterway from the Great lakes to the Hudson river. Letter from the secretary of war transmitting a report from chief of engineers on preliminary examination and survey of deeper waterway from the Great lakes to the Hudson river suitable for vessels of a draft of 20 or 25 feet ...

Mode of access: Internet.

Information for bidders, proposal, form of contract, bond and specifications for the toll buildings and flood light towers for the George Washington bridge over the Hudson river between Fort Washington and Fort Lee. Contract HRB-15. Bids received July 6, 1931.

At head of title: The Port of New York authority created by compact between the states of New York and New Jersey with the consent of Congress.

The traveller's guide through the state of New York, Canada, &c : embracing a general discription of the city of New-York; the Hudson river guide, and the fashionable tour to the Springs and Niagara falls; with steam-boat, rail-road, and stage routes; accompanied by correct maps.

"Canals and railroads in the state of New York": p.69

The Hudson River from ocean to source, historical-legendary-picturesque,

Mode of access: Internet.

Amended act of incorporation of the Hudson River railroad company, by-laws and extracts from revised statutes, &c., &c.

Mode of access: Internet.

Views on the Hudson.

Advertisement "T. Nelson and Sons' American views" on verso of p. 15.