Master Branchiostegal data
Entity (ENT) | Southeast Fisheries Science Center (SEFSC)GUID: gov.noaa.nmfs.inport:33248 | Updated: August 9, 2022 | Published / External
Item Identification
| Title: | Master Branchiostegal data |
|---|---|
| Short Name: | Master data |
| Status: | Completed |
| Abstract: |
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. |
Data Attributes
Attribute Summary
|
|
Name | Type | Description |
|---|---|---|---|---|
|
100
|
|
OBS | VARCHAR2(4 BYTE) | An arbitrarily assigned sequential number that serves as a key |
|
100
|
TRIP | VARCHAR2(4 BYTE) | The trip ID these data were collected during | |
|
100
|
CARC | VARCHAR2(20 BYTE) | The sample number assigned by the observer to this observation. This value is only unique within a trip, and can be null. | |
|
100
|
ANAL_ID | VARCHAR2(1 BYTE) | 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 | |
|
100
|
LJFL | number | The lower jaw fork length in centimeters (rounded to nearest centimeter), taken along the curve of the body. | |
|
100
|
LJBR | number | 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). | |
|
100
|
LJOP | number | 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). | |
|
100
|
AFH | number | the height of the first anal fin in centimeters (rounded to nearest centimeter). | |
|
100
|
AFA | number | the distance between the posterior of the anal opening and the anterior origin of the first anal fin in centimeters (rounded to nearest centimeter). |
Attribute Details
OBS
| Seq. Order: | 1 |
|---|---|
| Data Storage Type: | VARCHAR2(4 BYTE) |
| Required: | No |
| Primary Key: | Yes |
| Status: | Active |
| Description: |
An arbitrarily assigned sequential number that serves as a key |
TRIP
| Seq. Order: | 2 |
|---|---|
| Data Storage Type: | VARCHAR2(4 BYTE) |
| Required: | No |
| Primary Key: | No |
| Status: | Active |
| Description: |
The trip ID these data were collected during |
CARC
| Seq. Order: | 3 |
|---|---|
| Data Storage Type: | VARCHAR2(20 BYTE) |
| Required: | No |
| Primary Key: | No |
| Status: | Active |
| Description: |
The sample number assigned by the observer to this observation. This value is only unique within a trip, and can be null. |
ANAL_ID
| Seq. Order: | 4 |
|---|---|
| Data Storage Type: | VARCHAR2(1 BYTE) |
| Required: | No |
| Primary Key: | No |
| Status: | Active |
| Description: |
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 |
| Derivation: |
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. |
LJFL
| Seq. Order: | 5 |
|---|---|
| Data Storage Type: | number |
| Required: | No |
| Primary Key: | No |
| Status: | Active |
| Description: |
The lower jaw fork length in centimeters (rounded to nearest centimeter), taken along the curve of the body. |
LJBR
| Seq. Order: | 6 |
|---|---|
| Data Storage Type: | number |
| Required: | No |
| Primary Key: | No |
| Status: | Active |
| Description: |
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). |
LJOP
| Seq. Order: | 7 |
|---|---|
| Data Storage Type: | number |
| Required: | No |
| Primary Key: | No |
| Status: | Active |
| Description: |
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). |
AFH
| Seq. Order: | 8 |
|---|---|
| Data Storage Type: | number |
| Required: | No |
| Primary Key: | No |
| Status: | Active |
| Description: |
the height of the first anal fin in centimeters (rounded to nearest centimeter). |
AFA
| Seq. Order: | 9 |
|---|---|
| Data Storage Type: | number |
| Required: | No |
| Primary Key: | No |
| Status: | Active |
| Description: |
the distance between the posterior of the anal opening and the anterior origin of the first anal fin in centimeters (rounded to nearest centimeter). |
Catalog Details
| Catalog Item ID: | 33248 |
|---|---|
| GUID: | gov.noaa.nmfs.inport:33248 |
| Metadata Record Created By: | Larry Beerkircher |
| Metadata Record Created: | 2016-07-05 15:46+0000 |
| Metadata Record Last Modified By: | SysAdmin InPortAdmin |
| Metadata Record Last Modified: | 2022-08-09 17:11+0000 |
| Metadata Record Published: | 2021-05-06 |
| Owner Org: | SEFSC |
| Metadata Publication Status: | Published Externally |
| Do Not Publish?: | N |
| Metadata Last Review Date: | 2021-05-06 |
| Metadata Review Frequency: | 1 Year |
| Metadata Next Review Date: | 2022-05-06 |