<div><p>The methodology appeared effective at sampling groundfish abundance and distribution in the CLCA, and could potentially be used for a longer term monitoring program for this area. Although recent studies in the CLCA are extremely limited, this study indicated that groundfish are still abundant on Cashes Ledge. In general, this study demonstrated abundance of white hake, cod, and pollock in this area. Sampling in the spring and summer was also enough to demonstrate that seasonal patterns exist in these species abundances in the closure area. White hake was the most abundant species sampled . Abundance differed substantially with location and time. Highest abundance was during late June and July at the two shallower sites (e.g., 115 white hake were sampled at the 50 fm site on 12 July). A large portion of the white hake during this time had external signs of spawning, indicating that this could be an important spawning area. Very few white hake were observed at the deepest station (C). Cod were most abundant at the 50 fm station in June, while abundance was still increasing at the 22 fm station in mid-August when the survey was completed. In general, variability in cod abundance was much lower than that of white hake. In the 1980s, juvenile cod were frequently observed in studies of the kelp forests of Cashes Ledge (Vadas and Steneck 1988, 1995; Witman and Sebens 1992). Video methods determined that the distribution and abundance of Cashes Ledge cod was approximately an order of magnitude higher than the densities on several inshore ledges (Witman and Sebens 1992). Steneck (1997) determined that the average cod size recorded on Cashes Ledge in the 1980's ranged between 30 and 40 cm (approximately 2 years old based on average growth curves for the Gulf of Maine and Georges Bank [Bigelow and Schroeder 1953]). Older cod are generally found in deeper water (Swain 1993), but Steneck (1997) recorded cod up to a meter in length within the kelp forest at 30 m on Cashes Ledge (i.e., Ammen Rock). Jigging while on station yielded a high catch rate of cod at and around the kelp forest, and cod up to 18 kg (40 lbs) were caught at that location. Pollock were captured by all four mesh sizes of gillnets deployed in the CLCA in 2005 (each net consisted of 4 attached panels with 5.5-, 6-, 6.5-, and 7-inch mesh). There were two distinct size groupings that ranged from 30-50 cm and 65-85 cm.Pollock were well-represented in all four mesh sizes. It would be appropriate based on these results to expand this work to a longer time period so that trends in abundance can be monitored year round and between years. It would also be appropriate for future studies to consider monitoring outside of the closure area to allow for analysis of any effects the closure may have on distribution and abundance of groundfish, particularly cod, pollock and white hake in the region.</p></div>
Pilot Gillnet Survey of the Cashes Ledge Closed Area: fish catch data
<div><pre>
</pre><h3>"A Pilot Gillnet Survey of the Cashes Ledge Closed Area"</h3>
<p><strong>Project Leader: </strong><em>Kevin Kelly, </em>Maine Department of Marine Resources<br /><strong>Additional Participants:</strong><br /><em>Mathew Thomson, </em>F/V Shearwater II, Monhegan Island, ME</p>
<p>"The objective of this project is to test the use of gillnets to inventory fish populations in the Cashes Ledge Closed Area (CLCA) of the Gulf of Maine. The CLCA encompasses historically important fishing grounds which have been closed to groundfishing by federal regulation seasonally since 1999 and year round since 2002. Our purpose is to develop a methodology by which groundfish abundance can be regularly monitored in the CLCA. The expected outcome of the project will be a sampling methodology using gillnets that will minimize damage to bottom habitat and sample a variety of species and habitats effectively.</p>
<p>This project is needed to develop eventual long term standardized measures of relative abundance of groundfish in closed areas in collaboration with the commercial fishing industry. Maine DMR and Capt. Thomson were accepted for full funding for this work by Northeast Consortium (NEC) in response to the 2004 Request for Proposals for Project Development awards." <em>abstract from the Final Report to the Northeast Consortium</em></p>
<p> </p>
<pre>
<em>revised Sept 01, 2006; gfh </em>
</pre></div>
low-profile gillnet_substrate
<div><p>"The objective of this project is to test the use of gillnets to inventory fish populations in the Cashes Ledge Closed Area (CLCA) of the Gulf of Maine. The CLCA encompasses historically important fishing grounds which have been closed to groundfishing by federal regulation seasonally since 1999 and year round since 2002. Our purpose is to develop a methodology by which groundfish abundance can be regularly monitored in the CLCA. The expected outcome of the project will be a sampling methodology using gillnets that will minimize damage to bottom habitat and sample a variety of species and habitats effectively. This project is needed to develop eventual long term standardized measures of relative abundance of groundfish in closed areas in collaboration with the commercial fishing industry. Maine DMR and Capt. Thomson were accepted for full funding for this work by Northeast Consortium (NEC) in response to the 2004 Request for Proposals for Project Development awards."</p></div>
2786
low-profile gillnet_substrate
2010-06-09T15:55:33-04:00
2010-06-09T15:55:33-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:2786
Pilot Gillnet Survey of the Cashes Ledge Closed Area: fish catch data from F/V Shearwater NEC-KK2004-1 in the the Cashes Ledge Closed Area (CLCA) of the Gulf of Maine from April to August 2005 (NEC-CoopRes project)
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Kelly, K. (2006) Pilot Gillnet Survey of the Cashes Ledge Closed Area: fish catch data from F/V Shearwater NEC-KK2004-1 in the the Cashes Ledge Closed Area (CLCA) of the Gulf of Maine from April to August 2005 (NEC-CoopRes project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version final) Version Date 2006-02-01 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/2786 [access date]
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2006-02-01
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