scholarly journals Characterizing Downstream Migration Timing of American Eels Using Commercial Catch Data in the Penobscot and Delaware Rivers

2021 ◽  
Vol 13 (5) ◽  
pp. 545-558
Author(s):  
Daniel M. Weaver ◽  
Douglas B. Sigourney ◽  
Mari‐Beth Delucia ◽  
Joseph D. Zydlewski
Keyword(s):  
Downstream Migration ◽  
Commercial Catch ◽  
Migration Timing ◽  
Catch Data ◽  
American Eels

Informing the vulnerability of species to spawning aggregation fishing using commercial catch data

2013 ◽  
Vol 143 ◽  
pp. 47-56 ◽  
Author(s):  
Andrew Tobin ◽  
Leanne Currey ◽  
Colin Simpfendorfer
Keyword(s):  
Spawning Aggregation ◽  
Commercial Catch ◽  
Catch Data

Selecting a subset of the commercial catch data for estimating catch per unit effort series for ling (Molva molva L.)

2015 ◽  
Vol 165 ◽  
pp. 115-120
Author(s):  
Kristin Helle ◽  
Michael Pennington ◽  
Nils-Roar Hareide ◽  
Inge Fossen
Keyword(s):  
Catch Per Unit Effort ◽  
Commercial Catch ◽  
Catch Data ◽  
Unit Effort

Large-scale migration patterns of silver American eels from the St. Lawrence River to the Gulf of St. Lawrence using acoustic telemetry

2014 ◽  
Vol 71 (10) ◽  
pp. 1579-1592 ◽  
Author(s):  
Mélanie Béguer-Pon ◽  
Martin Castonguay ◽  
José Benchetrit ◽  
Daniel Hatin ◽  
Guy Verreault ◽  
...  
Keyword(s):  
Acoustic Telemetry ◽  
River Discharge ◽  
Large Scale ◽  
Downstream Migration ◽  
Individual Variability ◽  
Migration Patterns ◽  
Acoustic Arrays ◽  
Longitudinal Profiles ◽  
American Eels ◽  
St Lawrence River

Downstream migration of silver American eels (Anguilla rostrata) from the St. Lawrence system was examined using acoustic telemetry. One hundred and thirty six silver American eels were tagged, and their passage was recorded using fixed acoustic arrays covering a 420 km distance along the St. Lawrence River and Estuary. Eighty-nine percent of the tagged eels were detected. All migrant eels (111) exhibited unidirectional and downstream movements, but the migration was not completed in one continuous direct movement. High individual variability in migratory longitudinal profiles was documented as well as in individual speed with no apparent relation to river discharge or morphological traits. Migration speed increased over the season. Our observations demonstrated that migrating silver American eels are largely nocturnal and demonstrated the use of nocturnal, ebb tide transport to leave the estuary. With 44 additional eels tagged and released in the maritime estuary, escapement of 180 silver American eels from the Gulf of St. Lawrence system was monitored along a 125 km acoustic line that entirely covered Cabot Strait in 2011. Surprisingly, only four of the tagged eels were recorded escaping the Gulf of St. Lawrence.

Studying species associations from commercial catch data: a Baltic Sea application

2005 ◽  
Vol 72 (2-3) ◽  
pp. 301-310 ◽  
Author(s):  
Laura Uusitalo ◽  
Kimmo Vehkalahti ◽  
Sakari Kuikka ◽  
Pirkko Söderkultalahti
Keyword(s):  
Baltic Sea ◽  
Commercial Catch ◽  
Catch Data

Predictive mapping of abalone fishing grounds using remotely-sensed LiDAR and commercial catch data

2015 ◽  
Vol 169 ◽  
pp. 26-36 ◽  
Author(s):  
M. Ali Jalali ◽  
Daniel Ierodiaconou ◽  
Jacquomo Monk ◽  
Harry Gorfine ◽  
Alex Rattray
Keyword(s):  
Remotely Sensed ◽  
Commercial Catch ◽  
Predictive Mapping ◽  
Catch Data

scholarly journals Get up early: Revealing behavioral responses of sandeel to ocean warming using commercial catch data

2021 ◽  
Author(s):  
Ole Henriksen ◽  
Anna Rindorf ◽  
Henrik Mosegaard ◽  
Mark R. Payne ◽  
Mikael van Deurs
Keyword(s):  
Behavioral Responses ◽  
Ocean Warming ◽  
Commercial Catch ◽  
Catch Data

The impact of global positioning systems and plotters on fishing power in the northern prawn fishery, Australia

1998 ◽  
Vol 55 (7) ◽  
pp. 1645-1651 ◽  
Author(s):  
Carolyn M Robins ◽  
You-Gan Wang ◽  
David Die
Keyword(s):  
Linear Model ◽  
Generalized Linear Model ◽  
Global Positioning Systems ◽  
Commercial Catch ◽  
Positioning Systems ◽  
Catch Data ◽  
Global Positioning ◽  
Management Controls ◽  
The Impact ◽  
Northern Prawn Fishery

The impact of global positioning systems (GPS) and plotter systems on the relative fishing power of the northern prawn fishery fleet on tiger prawns (Penaeus esculentus Haswell, 1879, and P. semisulcatus de Haan, 1850) was investigated from commercial catch data. A generalized linear model was used to account for differences in fishing power between boats and changes in prawn abundance. It was found that boats that used a GPS alone had 4% greater fishing power than boats without a GPS. The addition of a plotter raised the power by 7% over boats without the equipment. For each year between the first to third that a fisher has been working with plotters, there is an additional 2 or 3% increase. It appears that when all boats have a GPS and plotter for at least 3 years, the fishing power of the fleet will increase by 12%. Management controls have reduced the efficiency of each boat and lowered the number of days available to fish, but this may not have been sufficient to counteract the increases. Further limits will be needed to maintain the desired levels of mortality.

scholarly journals The Irish Sea data-enhancement project: comparison of self-sampling and national data-collection programmes—results and experiences

2011 ◽  
Vol 68 (8) ◽  
pp. 1778-1784 ◽  
Author(s):  
Deirdre Hoare ◽  
Norman Graham ◽  
Pieter-Jan Schön
Keyword(s):  
Data Collection ◽  
Data Quality ◽  
Irish Sea ◽  
Marine Science ◽  
National Data ◽  
Commercial Catch ◽  
Catch Data ◽  
National Programmes ◽  
The Irish Sea ◽  
The Uk

Abstract Hoare, D., Graham, N., and Schön, P-J. 2011. The Irish Sea data-enhancement project: comparison of self-sampling and national data-collection programmes—results and experiences. – ICES Journal of Marine Science, 68: 1778–1784. The Irish Sea Data Enhancement Pilot (ISDEP) was initiated by the UK and Irish fishing sectors, with the objective of improving the precision of commercial catch data (landings and discards) from vessels engaged in demersal trawling in the Irish Sea (ICES Division VIIa). The programme was supported by the Irish and UK Governments and managed by national laboratories. The experience of establishing and managing such a programme, including logistical, data-quality, and participation issues, is discussed. By contrasting with parallel national programmes, it is shown that the new data are robust and have improved precision. Experience has also shown that it is preferable to involve a few vessels in providing frequent samples, but that positive incentives are needed to maintain the participation.

Sign in / Sign up

Export Citation Format

Share Document