Recovery potential of smalltooth sawfish,Pristis pectinata, in the United States determined using population viability models

2014 ◽  
Vol 25 (2) ◽  
pp. 187-200 ◽  
Author(s):  
John K. Carlson ◽  
Colin A. Simpfendorfer
Keyword(s):  
United States ◽  
The United States ◽  
Population Viability ◽  
Recovery Potential ◽  
Pristis Pectinata

A habitat-based population viability analysis for ocelots (Leopardus pardalis) in the United States

2006 ◽  
Vol 132 (4) ◽  
pp. 424-436 ◽  
Author(s):  
Aaron M. Haines ◽  
Michael E. Tewes ◽  
Linda L. Laack ◽  
Jon S. Horne ◽  
John H. Young
Keyword(s):  
United States ◽  
Population Viability Analysis ◽  
The United States ◽  
Population Viability ◽  
Leopardus Pardalis ◽  
Viability Analysis

scholarly journals Putative extinction of two sawfish species in Mexico and the United States

2009 ◽  
Vol 7 (3) ◽  
pp. 508-512 ◽  
Author(s):  
Pablo del Monte-Luna ◽  
José Luis Castro-Aguirre ◽  
Barry W. Brook ◽  
José de la Cruz-Agüero ◽  
Víctor Hugo Cruz-Escalona
Keyword(s):  
United States ◽  
Gulf Of California ◽  
Atlantic Coast ◽  
The United States ◽  
Critically Endangered ◽  
International Union ◽  
The Us ◽  
Pristis Pectinata

All species of sawfish are listed by the International Union for the Conservation of Nature (IUCN) as endangered or critically endangered. In fact, the smalltooth sawfish Pristis pectinata, and the largetooth sawfish Pristis pristis, have been declared to be regionally and locally extinct from the US Atlantic coast and the Gulf of California, Mexico, respectively, likely due to overfishing. However, here we dispute these claims by illustrating how lack of existence of a given species within a region can be misconstrued as evidence for extinction.

Island in the Stream: Oceanography and Fisheries of the Charleston Bump

2001 ◽  
Keyword(s):  
United States ◽  
Life History ◽  
The United States ◽  
Fishing Mortality ◽  
Recovery Potential ◽  
Boom And Bust ◽  
History Of ◽  
Mean Size ◽  
Time Periods ◽  
Charleston Bump

<em>Abstract.</em>—Deepwater fisheries throughout the world appear to be particularly susceptible to extremely rapid overexploitation, with many species exhibiting signs of overfishing. The “boom and bust” nature of these fisheries, particularly as it applies to specific locations, often means a fishery may be overfished before management can react. The rapid removal of fish from a previously unexploited population could have significant effects on the life history of the species. Only 15,275 kg of tilefish <em> Lopholatilus chamaeleonticeps </em>were landed in the southeastern United States in 1980, but by 1983, landings peaked at 1,596 metric tons. Tilefish were collected for life history analysis from 1980 to 1986 and 1996 to 1998 from the southeastern coast of the United States. Samples were obtained from fishery-independent research cruises and from commercial catches. We documented the life history parameters between the two time periods to determine if the rapid increase in fishing mortality had any impact on the life history of tilefish. We found a significant decrease in the mean length at age for most age classes between the two time periods for males and females. The size at maturity decreased between 1980 and 1986 and 1996 and 1998, and the size and age of reproductively active tilefish decreased between the two periods. We suggest “satellite” females may occur in the tilefish population where females smaller than a limiting size are unable to maintain a reproductive territory and do not reproduce, even though they are mature. This reduction in length at age and mean size of fish may reduce the potential reproductive output of the population, thereby limiting the recovery potential. The reduced fecundity of the population, combined with continued fishing mortality, slow growth, and limited habitat presents a unique and difficult conundrum for fishery managers to solve, which may apply to many deepwater fisheries.

Correlative microscopy in distrubuted (client/server) computing environments: tools for catalyzing the rapid dissemination of information about the cell biology of the human prostate

1995 ◽  
Vol 53 ◽  
pp. 682-683
Author(s):  
A. Hakam ◽  
J.T. Gau ◽  
M.L. Grove ◽  
B.A. Evans ◽  
M. Shuman ◽  
...  
Keyword(s):  
United States ◽  
Cell Biology ◽  
Tissue Bank ◽  
The United States ◽  
Prostate Adenocarcinoma ◽  
Correlative Microscopy ◽  
Client Server ◽  
Critical Elements ◽  
Transplant Organ

Prostate adenocarcinoma is the most common malignant tumor of men in the United States and is the third leading cause of death in men. Despite attempts at early detection, there will be 244,000 new cases and 44,000 deaths from the disease in the United States in 1995. Therapeutic progress against this disease is hindered by an incomplete understanding of prostate epithelial cell biology, the availability of human tissues for in vitro experimentation, slow dissemination of information between prostate cancer research teams and the increasing pressure to “ stretch” research dollars at the same time staff reductions are occurring.To meet these challenges, we have used the correlative microscopy (CM) and client/server (C/S) computing to increase productivity while decreasing costs. Critical elements of our program are as follows:1) Establishing the Western Pennsylvania Genitourinary (GU) Tissue Bank which includes >100 prostates from patients with prostate adenocarcinoma as well as >20 normal prostates from transplant organ donors.

Digital image acquisition, processing, and analysis in a polymer microscopy laboratory

1994 ◽  
Vol 52 ◽  
pp. 454-455
Author(s):  
Vinod K. Berry ◽  
Xiao Zhang
Keyword(s):  
United States ◽  
Image Analysis ◽  
Digital Image ◽  
Image Acquisition ◽  
Image Transmission ◽  
The United States ◽  
Quantitative Image Analysis ◽  
Quantitative Image

In recent years it became apparent that we needed to improve productivity and efficiency in the Microscopy Laboratories in GE Plastics. It was realized that digital image acquisition, archiving, processing, analysis, and transmission over a network would be the best way to achieve this goal. Also, the capabilities of quantitative image analysis, image transmission etc. available with this approach would help us to increase our efficiency. Although the advantages of digital image acquisition, processing, archiving, etc. have been described and are being practiced in many SEM, laboratories, they have not been generally applied in microscopy laboratories (TEM, Optical, SEM and others) and impact on increased productivity has not been yet exploited as well.In order to attain our objective we have acquired a SEMICAPS imaging workstation for each of the GE Plastic sites in the United States. We have integrated the workstation with the microscopes and their peripherals as shown in Figure 1.

Silence of the Land: On the Historical Irrelevance of Territory to Congressional Districting and Political Representation in the United States

2001 ◽  
Vol 15 (01) ◽  
pp. 53-87 ◽  
Author(s):  
Andrew Rehfeld
Keyword(s):  
United States ◽  
House Of Representatives ◽  
Political Representation ◽  
The United States ◽  
Representative Government ◽  
Congressional District ◽  
Congressional Districts ◽  
Communities Of Interest

Every ten years, the United States “constructs” itself politically. On a decennial basis, U.S. Congressional districts are quite literally drawn, physically constructing political representation in the House of Representatives on the basis of where one lives. Why does the United States do it this way? What justifies domicile as the sole criteria of constituency construction? These are the questions raised in this article. Contrary to many contemporary understandings of representation at the founding, I argue that there were no principled reasons for using domicile as the method of organizing for political representation. Even in 1787, the Congressional district was expected to be far too large to map onto existing communities of interest. Instead, territory should be understood as forming a habit of mind for the founders, even while it was necessary to achieve other democratic aims of representative government.

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