30416
ROUNDSCALE SPEARFISH branchiostegal morphometric data
Data Set
Published / External
26098
Roundscale Spearfish Head Morphology
Project
In Work
The morphometric characteristics that separate white marlin Kajikia albidus from roundscale spearfish Tetrapturus georgii can be difficult for non-experts to distinguish, particularly when the animals are in the water. Using the measurements of the lower jaw tip to the longest branchiostegal ray (LJBR) and the opercle (LJOP), a discriminant function is presented that will help field observers separate the two species. The function DR-W LJBR (3.31861) LJOP (-2.84856) 6.37198 classified specimens as roundscale spearfish when DR-W was 0 and as white marlin when DR-W 0 with a 95 correct classification rate overall. Since only the head of a specimen needs to be closely observed, the method has particular utility for tournament anglers during the hook removal process.
Establish identification criteria
Theme
fishdep
Theme
fishery-dependent
Southeast Fisheries Science Center
Miami
FL
USA
Location Of The Main Office Of The South East Fisheries Science Center
Data Set
Table (digital)
N/A
N/A
N/A
33248
Master Branchiostegal data
Master data
Published / External
Completed
The morphometric characteristics that separate white marlin Kajikia albidus from roundscale spearfish Tetrapturus georgii can be difficult for non-experts to distinguish, particularly when the animals are in the water. Using the measurements of the lower jaw tip to the longest branchiostegal ray (LJBR) and the opercle (LJOP), a discriminant function is presented that will help field observers separate the two species. The function DR-W = LJBR (3.31861) + LJOP (-2.84856) – 6.37198 classified specimens as roundscale spearfish when DR-W was > 0 and as white marlin when DR-W < 0 with a 95% correct classification rate overall. Since only the head of a specimen needs to be closely observed, the method has particular utility for tournament anglers during the hook removal process.
1
OBS
VARCHAR2(4 BYTE)
No
Yes
Active
An arbitrarily assigned sequential number that serves as a key
2
TRIP
VARCHAR2(4 BYTE)
No
No
Active
The trip ID these data were collected during
3
CARC
VARCHAR2(20 BYTE)
No
No
Active
The sample number assigned by the observer to this observation. This value is only unique within a trip, and can be null.
4
ANAL_ID
VARCHAR2(1 BYTE)
No
No
Active
The species identification based on the anal opening/anal fin height ratio as categorized in Beerkircher et. al. (2008). R=roundscale spearfish, W= white marlin
Beerkircher, L.R., D.W. Lee, and G.F. Hinteregger. 2008a. Roundscale spearfish Tetrapturus georgii: morphology, distribution, and relative abundance in the western North Atlantic. Bull. Mar. Sci. 82:155-170.
5
LJFL
number
No
No
Active
The lower jaw fork length in centimeters (rounded to nearest centimeter), taken along the curve of the body.
6
LJBR
number
No
No
Active
The length from the tip of the jaw to the distal end of the longest branchiostegal ray taken in a straight line in centimeters (rounded to nearest centimeter).
7
LJOP
number
No
No
Active
the length from the tip of the jaw to the distal end of the opercle taken in a straight line axially in c centimeters (rounded to nearest centimeter).
8
AFH
number
No
No
Active
the height of the first anal fin in centimeters (rounded to nearest centimeter).
9
AFA
number
No
No
Active
the distance between the posterior of the anal opening and the anterior origin of the first anal fin in centimeters (rounded to nearest centimeter).
Data Steward
2008
Person
Beerkircher, Larry
lawrence.r.beerkircher@noaa.gov
75 Virginia Beach Drive
Miami
FL
33149
305-361-4290
Contact by email preferred.
Distributor
2008
Organization
Southeast Fisheries Science Center
SEFSC
75 Virginia Beach Drive
Miami
FL
33149
USA
(305)361-5761
https://www.fisheries.noaa.gov/about/southeast-fisheries-science-center
About SEFSC
Online Resource
8:00 a.m. - 4:30 p.m. EST
Contact by email preferred.
Metadata Contact
2008
Person
Beerkircher, Larry
lawrence.r.beerkircher@noaa.gov
75 Virginia Beach Drive
Miami
FL
33149
305-361-4290
Contact by email preferred.
Point of Contact
2008
Person
Beerkircher, Larry
lawrence.r.beerkircher@noaa.gov
75 Virginia Beach Drive
Miami
FL
33149
305-361-4290
Contact by email preferred.
Ground Condition
-95
-44
46
7
Caribbean Sea And U.S. South Atlantic Ocean
Range
2008
2009
Unclassified
Contact POC
Waiver Needed
Each data submission by observer reviewed by subject matter expert (POC) for unusual values.
No
0
Yes
No
No
0
N/A
To Be Determined
0
The data resides on a secure government network requiring multi-factor authentication for network access.
1
Collection on board commercial fishing vessels by trained observers on paper forms. Paper forms submitted to Miami Laboratory Pelagic Observer Program for review and editing. Data entered into an excel spreadsheet for original maintenance and analysis resident on PI/POC workstation PC. Post analyses and peer-review-results publication, data moved to Oracle tables at Miami Laboratory.
33248
Entity
Master Branchiostegal data
gov.noaa.nmfs.inport:30416
Lee Weinberger
2016-02-03T06:10:22
Bryson Anderson
2023-01-27T17:34:54
2021-05-06
Southeast Fisheries Science Center
SEFSC
75 Virginia Beach Drive
Miami
FL
33149
USA
(305)361-5761
www.sefsc.noaa.gov
8:00 a.m. - 4:30 p.m. EST
1001
Public
No
2021-05-06
1 Year
2022-05-06