<div><table cellspacing="0" cellpadding="0"><colgroup><col width="125" span="2" /><col width="69" /><col width="72" /><col width="125" span="2" /></colgroup><tbody><tr height="33"><td width="125" height="33">Sample Trap<br />
Head Name</td>
<td width="125">Head Design</td>
<td width="69">
<p align="center">Number of<br />
type made</p>
</td>
<td width="72">
<div align="center">Number<br />
of Hauls</div>
</td>
<td width="125">Purpose</td>
<td width="125">Results</td>
</tr><tr height="65"><td width="125" height="65">Large High</td>
<td width="125">plastic covered wire mesh large horizontal opening high angle</td>
<td width="69">
<div align="center">7</div>
</td>
<td width="72">
<div align="center">1</div>
</td>
<td width="125">Catch sublegal lobster, exclude legal size lobster.</td>
<td width="125">Caught lots of crabs</td>
</tr><tr height="65"><td width="125" height="65">Large Low</td>
<td width="125">plastic covered wire mesh large horizontal opening low angle</td>
<td width="69">
<div align="center">7</div>
</td>
<td width="72">
<div align="center">1</div>
</td>
<td width="125">Catch sublegal lobster, exclude legal size lobster.</td>
<td width="125">Caught one lobster, lots of crabs</td>
</tr><tr height="65"><td width="125" height="65">Small High</td>
<td width="125">plastic covered wire mesh small horizontal opening high angle</td>
<td width="69">
<div align="center">7</div>
</td>
<td width="72">
<div align="center">1</div>
</td>
<td width="125">Catch sublegal lobster, exclude legal size lobster.</td>
<td width="125">Caught lots of crabs</td>
</tr><tr height="65"><td width="125" height="65">Small Low</td>
<td width="125">plastic covered wire mesh small horizontal opening low angle</td>
<td width="69">
<div align="center">7</div>
</td>
<td width="72">
<div align="center">1</div>
</td>
<td width="125">Catch sublegal lobster, exclude legal size lobster</td>
<td width="125">Caught one lobster, lots of crabs</td>
</tr><tr height="65"><td width="125" height="65">Vertical Opening</td>
<td width="125">plastic covered wire mesh vertical rectangular opening</td>
<td width="69">
<div align="center">1</div>
</td>
<td width="72">
<div align="center">Several in one day, used video camera</div>
</td>
<td width="125">Discover crab capabilities of entering different head designs.</td>
<td width="125">Showed the ability of crab to access traps</td>
</tr><tr height="65"><td width="125" height="65">Chalmers</td>
<td width="125">cloth mesh head opening has no wire ring</td>
<td width="69">
<div align="center">4</div>
</td>
<td width="72">
<div align="center">24</div>
</td>
<td width="125">Catch sublegal lobster, exclude legal size lobster and crabs.</td>
<td width="125">Caught sublegal lobster, excluded legal size lobster, caught crabs</td>
</tr><tr height="65"><td width="125" height="65">Fike 1</td>
<td width="125">cloth mesh head has wire ring with 2.5 inch opening</td>
<td width="69">
<div align="center">4</div>
</td>
<td width="72">
<div align="center">24</div>
</td>
<td width="125">Catch sublegal lobster, exclude legal size lobster and crabs</td>
<td width="125">Caught sublegal lobster, excluded legal size lobster, caught crabs</td>
</tr><tr height="97"><td width="125" height="97">Square</td>
<td width="125">Trap has no head instead one inch openings are present around the trap</td>
<td width="69">
<div align="center">4</div>
</td>
<td width="72">
<div align="center">4</div>
</td>
<td width="125">Openings in the trap simulates mesh of standard legal trap, discover if sublegal lobster move freely through the mesh.</td>
<td width="125">Caught no lobsters or crabs</td>
</tr><tr height="65"><td width="125" height="65">Fike 2</td>
<td width="125">cloth mesh head has wire ring opening of 1.75 inches</td>
<td width="69">
<div align="center">4</div>
</td>
<td width="72">
<div align="center">20</div>
</td>
<td width="125">Discover the smallest size head opening that lobster will enter through.</td>
<td width="125">Caught 2 very small lobsters and no crabs</td>
</tr></tbody></table></div>
Testing of trap styles for capture of sublegal sized lobsters
<div><p> </p>
<p>"Designing and Testing a Sublegal Lobster Sampling Trap"</p>
<p>P.I.: Robert Bayer</p>
<p>Master's Thesis by William Fike</p>
<p>The objective of this study was to design a trap to fill a gap in the collection of data concerning lobster abundance. The trap design should allow sublegal sized lobsters to enter the trap while excluding legal sized lobsters. It is believed that the larger legal sized lobsters inhibit the smaller lobsters from entering the traps and therefore these smaller sized lobsters are not represented in the data collected at this current time. Having the ability to base stock size estimates on smaller size lobsters will help individuals estimate future catch.</p>
<p>See<a target="_blank" href="http://nec.whoi.edu/pdf/Bayer_05PD_finalreport.pdf"> final report</a></p></div>
sublegal lobster traps
<div><p>The data was entered into Microsoft Excel. All data that was recorded while at sea was transferred to a spreadsheet (See Appendix). Data was organized in Excel for the purpose of entering the data into the statistical program Systat. The Systat program was used to conduct an Analysis of Variance for analyzing each trap type: ventless, Fike 1, Fike 2, and Chalmers trap. The dependent variable was lobster carapace length (mm), with trap type, date, location, soak period, and number of crabs in trap as independent variable (Table 2). Insignificant main effects (P>.05) were removed and a reduced model was evaluated. Three variables, depth, bottom type, and catch, which is the number of lobsters caught in each trap, were found not significant and were removed. The Analysis of Variance was then run a second time, excluding these three variables (Table 3). Effects of trap type, soak period, number of crabs, and location on lobster size were included in a prediction equation (Table 4). A final model included significant main effects with interaction terms between main effects (Table 5). Results were presented graphically.</p></div>
3137
sublegal lobster traps
2010-08-04T09:52:18-04:00
2010-08-04T09:52:18-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:3137
Testing of trap styles for capture of sublegal sized lobsters from unknown lobster boat NEC-RB2005-1 in the Southwest Harbor, Mt. Desert Island, Maine from 2006-2007 (NEC_ProjDev project)
false
Bayer, R. C. (2009) Testing of trap styles for capture of sublegal sized lobsters from unknown lobster boat NEC-RB2005-1 in the Southwest Harbor, Mt. Desert Island, Maine from 2006-2007 (NEC_ProjDev project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 29 June 2009) Version Date 2009-06-29 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3137 [access date]
true
29 June 2009
false
2009-06-29
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