Species Analyses

Once onboard, the catch from each tow is sorted and measured by species and size-class if distinct classes within a particular species are evident. A subsample of each species/size-class is further processed for individual weight determination, stomach contents, ageing, and determination of sex and maturity stage.

Single-species assessment models typically require information on (among others) age-, length-, and weight-structure, sex ratio, and maturity stage. Data were synthesized to characterize annual length- and age-frequency distributions. Analytical computer programs to characterize each of the assessment-related data elements (length, weight, age, sex, maturity) were developed to allow for the summarization of these characteristics across a variety of spatial and temporal scales (e.g., by year, season, or region of the bay) for each species.

ChesMMAP

Number of specimens collected, measured and processed for age determination and diet composition, 2002-2012


Year Number of Species Specimens Collected Specimens Measured Otoliths Sampled

Otoliths
Processed

Stomachs Sampled Stomachs
Processed
2002 80 32,019 23,605 5,487 4,944 4,560 3,019
2003 75 30,924 20,828 3,913 3,055 3,250 2,416
2004 71 47,622 31,245 5,169 4,290 4,272 3,330
2005 77 45,204 36,909 6,065 5,006 5,067 3,375
2006 79 43,957 31,243 5,413 4,229 4,402 2,940
2007 75 30,893 22,124 4,282 3,253 3,674 2,871
2008 80 26,299 19,596 4,206 3,048 3,678 3,427
2009 103 22,050 15,694 3,227 2,206 2,722 2,613
2010 100 26,337 20,566 4,003 2,653 3,424 3,236
2011 89 21,185 16,397 3,429 1,999 2,742 2,525
2012 91 17,329 14,955 2,497 1,519 2,016 1,734
2013 89 21,369 14,623 2,739 1,646 1,939 1,375
2014 80 11,316 7,807 1,740 988 893 837
2015 93 22,981 13,011 2,502 1,438 1,137 1,126
2016 94 28,165 18,042 3,341 1,603 1,468
TOTAL 427,627 306,637 59,128 39,926 46,956 36,968

NEAMAP

Total number of species collected, along with the number of specimens caught, the weight of these animals in kilograms, and the number sampled for individual length measurements, given by survey cruise and overall. The numbers sampled and processed (to date) for age and diet determination are also provided.


Cruise Number of Species Specimens Collected Specimens Measured Otoliths Sampled Otoliths
Processed
Stomachs Sampled Stomachs
Processed
Fall 2007 126 1,101,152 73,473 5,150 3,245 3,905 3,663
Spring 2008 85 298,923 54,700 6,132 3,226 4,810 3,807
Fall 2008 128 731,429 61,334 4,609 3,503 3,383 3,241
Spring 2009 93 285,304 77,276 6,570 3,483 4,851 3,879
Fall 2009 102 1,242,518 105,757 6,446 4,837 4,562 4,256
Spring 2010 91 284,602 50,617 5,285 2,741 4,016 2,811
Fall 2010 125 803,121 93,025 5,149 3,845 3,570 3,466
Spring 2011 108 317,030 72,365 5,262 2,751 3,901 3,772
Fall 2011 124 705,925 86,525 4,766 3,675 3,434 3,209

Spring 2012

111 341,543 93,991 5,926 2,578 4,245 3,918

Fall       2012 

124 1,209,251 136,205 6,217 4,265 4,041 3,595

Spring 2013

90 280,929 83,495 6,418 2,598 4,515 4,232
Fall 2013 124 863,162 100,989 4,867 3,166 2,868 2,496
Spring 2014 84 177,337 55,338 5,491 2,348 3,311 3,239
Fall 2014 133 1,131,499 100,517 4,487 3,086 2,281 2,263
Spring 2015 87 148,470 55,159 5,497 2,618 3,105 3,053
Fall 2015 131 753,716 117,717 4,906 3,270 2,262 2,197
Spring 2016 111 489,855 98,054 6,959 3,381 2,542
Fall 2016 141 562,542 96,462 4,587 2,042
TOTAL 11,736,549 1,628,477 105,172 55,430 68,756 59,692

The species descriptions provided on this site are directly from:

FAO Species Identification Guide for Fishery Purposes - The Living Marine Resources of the Western Central Atlantic

Volume 1 : Introduction, molluscs, crustaceans, hagfishes, sharks, batoid fishes and chimaeras

Volume 2 : Bony Fishes Part 1 (Acipenseridae to Grammatidae)

Volume 3 : Bony Fishes Part 2 (Opistognathidae to Molidae), sea turtles and marine mammals