ETP_Dolphin: Eastern Tropical Pacific spotted dolphin survey

In DistanceDevelopment/dsdata: Distance sampling workshop data

Description

Observers aboard tuna vessels detecting dolphin schools along with a number of possibly useful covariates for modelling the detection function.

Format

A data frame with 1090 rows and 13 variables.

Region.Label	stratum labels (only one)
Area	size (nmi) of each stratum
Sample.Label	transect labels
Effort	transect length (nmi)
object	object ID
distance	perpendicular distance (nmi)
LnCluster	natural log of cluster size
Month	month of detection
Beauf.class	Beaufort sea state
Cue.type	initial cue triggering detection
Search.method	observer method making the detection
size	cluster size
Study.Area	study area name

Note

Several different search methods included in these data

0	binoculars from crows nest
2	binoculars from elsewhere on ship
3	helicopter searching ahead of ship
5	radar detects of seabirds above dolphin schools

Source

Inter-American Tropical Tuna Commission

See Also

Several cue types were also recorded by observers.

1	seabirds above the school
2	water splashes
3	unspecified
4	floating objects such as logs

DistanceDevelopment/dsdata documentation built on July 29, 2020, 11 p.m.