Dataset

Long-term Otter Trawl Survey

OBIS Malaysia Open in mapper Explore occurrences

Long-term Otter Trawl Survey is performed at various estuarine and inner continental shelf sites during July and September each year. Trawl used has a length of 4.9 m and 6 mm bar mesh at the cod end. Tows (n=3) are 2 minutes long. For each tow 20 individuals of each species are measured (fish - TL or FL, crabs - BW, sex is also noted) and the remainder are counted. Shrimp, hermit crabs and mud crabs are not counted.

Citation: Vasslides, J. M., J. L. Rackovan, J. L. Toth, R. Hagan, and K. W. Able. 2011. Metadata Manual for Fish and Environmental Records at the Rutgers University Marine Field Station. IMCS Technical Report #2011-1.

Published: November 12, 2018 at 15:28

URL: http://ipt.iobis.org/obis-malaysia/resource?r=ottertrawl_v1

517
occurrence records
54
taxa
51
species

Taxa

Missing and invalid fields

Field Missing Invalid
coordinateUncertaintyInMeters 517
100.0%
maximumDepthInMeters 514
99.4%
minimumDepthInMeters 246
47.6%
occurrenceStatus 517
100.0%

Quality flags

The OBIS data quality flags are documented at https://github.com/iobis/obis-qc.

Flag Dropped Records
NO_DEPTH 246
47.6%
NOT_MARINE 2
0.4%
NO_ACCEPTED_NAME 1
0.2%

Measurement types

DNA derived data