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Title: Compilation of fishing area maps used in commercial catch reporting in the U.S. Virgin Islands (1974/75 to 2004/05) including subarea conversion factors between maps
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Permanent Link: http://ufdc.ufl.edu/CA01300947/00001
 Material Information
Title: Compilation of fishing area maps used in commercial catch reporting in the U.S. Virgin Islands (1974/75 to 2004/05) including subarea conversion factors between maps
Physical Description: Book
Language: English
Creator: Valiulis, Jennifer
Publisher: Bureau of Fisheries, Division of Fish and Wildlife, Department of Planning and Natural Resources
Place of Publication: St. Croix, USVI
 Record Information
Bibliographic ID: CA01300947
Volume ID: VID00001
Source Institution: University of the Virgin Islands
Holding Location: University of the Virgin Islands
Rights Management: All rights reserved by the source institution and holding location.

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Table of Contents
    Front Cover
        Page 1
    Main
        Page 2
        Page 3
        Page 4
        Page 5
        Page 6
        Page 7
        Page 8
        Page 9
        Page 10
    Appendix
        Page 11
        Page 12
        Page 13
        Page 14
        Page 15
        Page 16
Full Text



















COMPILATION OF FISHING AREA MAPS USED IN
COMMERCIAL CATCH REPORTING IN THE U.S.
VIRGIN ISLANDS (1974/75 TO 2004/05)
INCLUDING SUBAREA CONVERSION
FACTORS BETWEEN MAPS







Jennifer Valiulis and Jennifer Messineo


Bureau of Fisheries
Division of Fish and Wildlife
Department of Planning and Natural Resources
U.S. Virgin Islands


February 2005









BACKGROUND

The Division of Fish and Wildlife is in the process of identifying and organizing historical data
from the U.S. Virgin Islands commercial fisheries. Thirty years of commercial catch data can be
used to analyze the health and status of these fisheries. An important element of commercial
fisheries data is the catch location or area.

Each fishing district (St. Thomas/St. John and St. Croix) has its own fishing area map divided
into separate subareas. Commercial fishers are required to record the area they fished on their
commercial catch reports.

The objective of this report is to document the various fishing area maps for St. Thomas/St. John
and St. Croix for the 1974/75 to 2003/04 fishing years. The fishing year is from July 1 to June
30 the following year.

Additionally, in order to accurately compare past and present commercial catch data, conversion
ratios between old fishing areas and current areas need to be developed. This report presents
these ratios and the methodology for developing them.


METHODOLOGY

Comparison of fishing area maps

As part of the identification and organization of old files, hard copies of commercial catch
reports were identified. Included with catch reports for some years were maps of the U.S. Virgin
Islands divided into fishing areas. Each fishing subarea had its own code. St. Thomas/St. John
district had one set of codes. St. Croix district had separate area codes.

Fisher information booklets (see Bureau of Environmental Enforcement and Division of Fish and
Wildlife 1981 and 1982; Department of Conservation and Culture Affairs 1985 and 1987;
Department of Planning and Natural Resources, Division of Fish and Wildlife ca late 1980's,
1992 and 1993; Department of Planning and Natural Resources, Division of Fish and Wildlife
1995; Department of Planning and Natural Resources 1996, 1997, 1998, and 2000; and
Department of Planning and Natural Resources 2001, 2002, 2003, and 2004) are also part of the
commercial catch report package. Often, these fisher information books include the fishing area
map. These booklets were reviewed to identify which fishing area map was in use for that
particular fishing year.

Fishing area maps were identified and compiled for both St. Thomas/St. John and St. Croix for
fishing years between 1974/75 and 2003/04. Maps could not be located for fishing years
1975/76, 1976/77, 1977/78, 1979/80, 1980/81, 1982/83, 1983/84, 1984/85, and 1985/86.
However, the data files for these years were consulted to determine which area codes were used.
This identified which fishing area map was used that year.











d fishing areas to those currently being used, the percentage of 1
1 of the current fishing subareas was determined. To do this, bot
e mapped in ArcView. In most cases, little information exists
'oundaries, so a best estimate based on the maps given to fishers

ry and the boundary line between fishing areas are provided in t
s provided to commercial fishers over the years. However, the I
, was never defined for any of these subareas (except some of tl
VI international boarder). Fishers can travel many miles offsho
ize the outside limit, two different definitions for the outer boun
The first was to define the outer boundary as the 100 fathom dr
fine the outer boundary as the 3 mile territorial waters boundari
needed of the outside boundary so that the area of each subarea
>mpared.

;t. John two different approaches were taken to define the outsic
-st approach was defining the outside boundary of fishing subar
tries (3 miles from shore). In this case, the British Virgin Islan
;ast and north of St. John, and Puerto Rico territorial water bour
-re used as east and west boundaries.

coach used for St.Thomas/St. John was to define the outside bout
00 fathom depth drop-off. Again, the east and west boundaries
ter boundaries between Puerto Rico, the USVI, and BVI.

Irop-off is very close to the shore in St. Croix. In some location
is from the shore, in other shore areas it is a few miles offshore.
e measure for use in determining the outer boundary of St. Croi
orial water boundary was used to estimate conversion factors b(
map subareas.

)n the fishing subareas were created and the area of each subare;
stricts (St. Thomas/St. John and St. Croix). Conversion factors
ie percentage of overlap of old subareas contained in current sul
















fishing map for St. Thomas/St. John used only five separate subareas: TN
and BBB (see Appendix B). No written record of land marks could be fou
he exact boundaries or how they were selected.

my fishers who regularly fished in St. John waters were confused by the ai
- of their location (Barshinger 1992). Therefore, in the 1992/93 St. Thoma!
sections of the TSE and TNE areas around St. John were divided into new s
see Appendix C). This was later changed to JN, JSW and JSE in 1994 (se,
:umentation could be found indicating the exact boundaries for the new are
hcrcfn









is and early 1990s, the maps issued for St. Croix were switched back and fortl
[n 1994/95, St. Croix returned to using the original fishing subareas and conti
)areas. St. Thomas/St. John has used four different maps between 1974/75 to


se of the different maps should ultimately result in an improved system of
;sents some difficulties when examining trends throughout the years in the cal
ubareas in old maps are not equal to the currently used subareas. To translate
on so that it can be compared throughout the years, conversion factors were
ese ratios indicate the percentage of each of the old fishing subareas that com]
.ed fishing subareas. Catch data from old fishing subareas can be multiplied I
;ompare with current catch data and then used to determine trends. The one
s method is that it assumes that there is an equal distribution of fish catches
I- I I


off conversic


s to the drop
ee Table 3)









apartment of Planning and Natural Resources, Division of Fish and Wildlife. 1995.
nmercial Fisherman's Information Booklet.

apartment of Planning and Natural Resources. 1996, 1997, 1998, and 2000. Commercial
herman's Information Booklet. Division of Environmental Enforcement and Division of I
SWildlife.

apartment of Planning and Natural Resources. 2001, 2002, 2003, and 2004. Recreational a
nmercial Fisherman's Information Booklet. Division of Environmental Enforcement and
vision of Fish and Wildlife.



'KNOWLEDGEMENTS

an Vasques assisted with ArcView computer analysis. An earlier draft of this report was
viewed by Ruth Gomez, William Tobias, Cheryl Ondeka, Dr. Roger Uwate, and Dr. Barbar
is.











Table 1. Fishing Area Maps Used by St. Thomas/St. John
and St. Croix commercial fishers in the 1974/75 to 2004/05
fishing years
Fishing Year St. Thomas/St. John St. Croix
74/75 A E
75/76 A E
76/77 A E
77/78 A E
78/79 A E
79/80 A E
80/81 A E
81/82 A E
82/83 A E
83/84 A E
84/85 A E
85/86 A E
86/87 A F
87/88 A, B E, F
88/89 A E
89/90 B F
90/91 A E
91/92 A E
92/93 C F
93/94 C F
94/95 D E
95/96 D E
96/97 D E
97/98 A, D E
98/99 D E
99/00 D E
00/01 D E
01/02 D E
02/03 D E
03/04 D E
04/05 D E
*note: Fishing year from July 1 to June 30 the following year.














on factors between old fishing area maps and map D currently used fo
John (Appendix D) using territorial boundaries as the outer limit
ibarea Old map subarea convention factors to Current Ma:
current Map D (see Appendix D) subarea (see Appendib
Subarea
x A)
B4, T3, (1.00 x Bl) + (1.00 xB2)+ (1.00 x B3)+ BBB
(1.00 x B4) + (0.63 x T3) + (0.27 x T4)
5 (0.35 x T4)+ (0.51 x T5) TNW
5 (0.63 x T1) + (0.49 x T5) TSW
0.31x T4 TNE
2 (0.37 x T1) + (0.39 x T2) TSE
0.07 x T4 JN
3 (0.24 x T2) + (0.37 x T3) JSE
0.37 x T2 JSW


- I I-F I












TABLE 3. Conversion factors between old fishing area maps and map D
currently used for St. Thomas/St. John (Appendix D) using the 100 fathom
drop off as the outer limit
Old Old map subarea Old map subarea conversion factor to Current Map D (see
Map current Map D subarea Appendix D) subarea
Map A (see Appendix A)
B1, B2, B3, B4, T3, (1.00 x B) + (1.00 x B2) + (1.00 x B3) BBB
T4 + (1.00 x B4) + (0.63 x T3) + (0.39 x T4)
T4, T5 (0.38 x T4) + (0.51 x T5) TNW*
T1, T5 (0.70 x T1) + (0.49 x T5) TSW*
T4 0.20 x T4 TNE
T1, T2 (0.30 x T1) + (0.23 x T2) TSE
T4 0.03 x T4 JN
T2, T3 (0.29 x T2) + (0.37 x T3) JSE
T2 0.48 x T2 JSW
Map B (see Appendix B)
BBB 1.00 x BBB BBB
TNW 1.00 x TNW TNW*
TSW 1.00 x TSW TSW*
TNE 0.86 x TNE TNE
TSE 0.43 x TSE TSE
TNE 0.14 x TNE JN
TSE 0.32 x TSE JSE
TSE 0.25 x TSE JSW
Map C (see Appendix C)
BBB 1.00 x BBB BBB
TNW 1.00 x TNW TNW*
TSW 1.00 x TSW TSW*
TNE 1.00 x TNE TNE
TSE 1.00 x TSE TSE
JN 1.00 x JN JN
JS 0.56 x JS JSE
JS 0.44 x JS JSW


*note: There is no drop off between Puerto Rico and western
were used as the outer limit.


St. Thomas. Territorial boundaries





TABLE 4. Conversion factors between old fishing area Map E (see
Appendix E) and Map F currently used for St. Croix (see Appendix
F) using territorial boundaries as outer limit.
Old Map E Current Map F
0.38 x XSW + 0.45 x XNW Cl
0.14 x XSE + 0.62 x XSW C2
0.72 x XSE C3
0.14 x XSE + 0.34 x XNE C4
0.63 x XNE C5
0.03 x XNE + 0.55 x XNW C6











Appendix A. St. Thomas/St. John Fishing Area Map A
(1974-89, 1990-1992, 1997-98)


't~"^N







3-3


P6oc~


,barracuda
bank
8 -4









Appendix B. St. Thomas/ St. John Fishing Area Map B
(1987-88, 1989-90)
N





7*B
Sn 1 5ik ito r to lae



savana / h. o


uck o7 09

ofrenchcap /./0O

-,--- .. 5 miles









Appendix C. St. Thomas/St. John Fishing Area Map C
(1992-94)

/
/ N

.... .. .. ..- -- kingfish

barracouta banks
banks jost
BBB van dyke
tobago r1ol
S0 tortola to
TNA W BBB beef
SWTNE "N .
----JN salt
CJN peter
S .st. john
savana ,

TSW norman.- 6-
b ick v TSE JS no ma

Sfr enchcap 0
- ~".S 'miles









Appendix D. St. Thomas/St. John Fishing Area Map D
(1994-2005)


/ N
/



barracqu :bar ks

jost
BBB ..an dyke
tobagor
TNW to-. rto a.

STNE




WTSW *'In
b ck TSE 5.E orm s

cfrGTchecp ,cO s mitesh
_J-5 E
-C.= p








Appendix E. St. Croix Fishing Area Map E
(1974-89, 1990-92, 1994-2005)






6 C-
l: ; C::; ^*-DlfUCk bnk

St. croix


0 OP C


S m les
5 miles


11,I








Appendix F. St. Croix Fishing Area Map F
(1987-88, 1989-90, 1992-94)


XNI
7-


r.' --- __ lang
-buck bank
If^ 7


XSE


,.-OP


XNW


00 orn
. ._.OO -- '


\--XSW


1 5 miles




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