Online-Only Table 7 The associated prey biological data for each prey sample.

From: A salmon diet database for the North Pacific Ocean

Column

Explanation

prey_id

A unique number that is generated and assigned to each prey sample

predator_id

A unique number that is generated and assigned to each predator sample

source_id

This number corresponds with the source_id from Online-only Table 2

year_min

YYYY; if there is just one value for the year then it is found in this attribute; if there are a range of values for the year then the minimum value is found in this attribute

year_max

YYYY; if there are a range of values for the year then the maximum value is entered into this attribute

warm_cool_years

Either ‘warm’, ‘cool’ or NA; this attribute will only have a value if the samples are explicitly reported as being from a warm versus cool year(s) and can only be uniquely identified this way

odd_even_years

Either ‘odd, ‘even’ or NA; this attribute will only have a value if the samples are explicitly reported as being from an odd versus even year(s) and can only be uniquely identified this way

season_min

Either ‘spring’, ‘summer’, ‘autumn’, or ‘winter’; if there is just one value for the season then it is entered into this attribute; If there are a range of values for the season then the minimum value is entered into this attribute; this attribute will only have a value if there is no value for the month/date and the source explicitly defines the temporal sampling period by season

season_max

Either ‘spring’, ‘summer’, ‘autumn’, or ‘winter’; if there are a range of values for the season then the maximum value is entered into this attribute; this attribute will only have a value if there is no value for the month/date and the source explicitly defines the temporal sampling period by season

month_min

Month names are completely spelled out with the first letter capitalized; if there is just one value for the month then it is entered into this attribute; If there are a range of values for the month then the minimum value is found in this attribute

month_max

Month names are completely spelled out with the first letter capitalized; if there are a range of values for the month then the maximum value is found in this attribute

date_min

Expressed using year, month, and day; if there is just one value for the date then it is entered into this attribute; if there are a range of values for the date then the minimum value is found in this attribute

date_max

Expressed using year, month, and day; if there are a range of values for the date then the maximum value is found in this attribute

time_min

HH:MM:SS; if there is just one value for the time then it is found in this attribute; if there are a range of values for the time then the minimum value is found in this attribute

time_max

HH:MM:SS; if there are a range of values for the time then the maximum value is found in this attribute

lat_min

If there is just one value for the latitude then it is found in this attribute; if there are a range of values for the latitude then the minimum value is found in this attribute; values are in decimal degrees format

lat_max

If there are a range of values for the latitude then the maximum value is found in this attribute; values are in decimal degrees format

lon_min

If there is just one value for the longitude then it is entered into this attribute; if there are a range of values for the longitude then the minimum value is entered into this attribute; values are in decimal degrees format

lon_max

If there are a range of values for the longitude then the maximum value is found in this attribute; values are in decimal degrees format

predator_lowest_taxonomic_level

The lowest taxonomic level reported in the source; if a source reports to the species level then this attribute includes both the genus and species names (e.g., Oncorhynchus nerka); only scientific names are reported, not common names

predator_life_stage

Either ‘juvenile’, ‘adult’ or NA

predator_life_stage_min

If there are a mixture of juveniles and adults, then ‘juvenile’ is entered here

predator_life_stage_max

If there are a mixture of juveniles and adults, then ‘adult’ is entered here

predator_freshwater_age

An integer to indicate the number of years spent living in freshwater

predator_freshwater_age_min

If there are a mixture of freshwater ages, then this attribute represents the minimum age; an integer to indicate the number of years spent living in freshwater

predator_freshwater_age_max

If there are a mixture of freshwater ages, then this attribute represents the maximum age; an integer to indicate the number of years spent living in freshwater

predator_ocean_age

An integer to indicate the number of years spent living in the ocean

predator_ocean_age_min

If there are a mixture of ocean ages, then this attribute represents the minimum age; an integer to indicate the number of years spent living in the ocean

predator_ocean_age_max

If there are a mixture of ocean ages, then this attribute represents the maximum age; an integer to indicate the number of years spent living in the ocean

predator_maturity

Either ‘juvenile’, ‘immature’, ‘maturing’ ‘mature’, ‘kelt’ (for steelhead), or NA

predator_maturity_min

If there are a mixture of maturity levels, then the minimum maturity level is found here

predator_maturity_max

If there are a mixture of maturity levels, then the maximum maturity level is found here

predator_length_value_cm

The length of a predator in centimeters (could be either fork length or total length); only reported if there is no other way to determine life stage, or if length or weight categories are the only way to uniquely identify samples of diet data from a source

predator_length_min_cm

The minimum length of a predator in centimeters (could be either fork length or total length) if there are a range of sizes; only reported if there is no other way to determine life stage, or if length or weight categories are the only way to uniquely identify samples of diet data from a source

predator_length_max_cm

The maximum length of a predator in centimeters (could be either fork length or total length) if there are a range of sizes; only reported if there is no other way to determine life stage, or if length or weight categories are the only way to uniquely identify samples of diet data from a source

predator_weight_value_g

The weight of a predator in grams; only reported if there is no other way to determine life stage, or if length or weight categories are the only way to uniquely identify samples of diet data from a source

predator_weight_min_g

The minimum weight of a predator in grams if there are a range of sizes; only reported if there is no other way to determine life stage, or if length or weight categories are the only way to uniquely identify samples of diet data from a source

predator_weight_max_g

The maximum weight of a predator in grams if there are a range of sizes; only reported if there is no other way to determine life stage, or if length or weight categories are the only way to uniquely identify samples of diet data from a source

predator_subsample_id

A unique number that is generated and assigned to predator samples if a source reports the diets of individual predators with no unique identifiers; values are assigned for each source starting from 1 and increasing by a value of 1 each time (e.g., 1,2,3…); if unique subsample_ids are not required then the default value is 0

predator_sex

Either ‘male’, ‘female’ or ‘unspecified’

hatchery_wild

Either ‘hatchery’, ‘wild’ or ‘unspecified’

predator_replicates

The total number of predator replicates per sample

predator_notes

Any additional comments on the predator

gear_type_predator_id1

This id number corresponds with the gear_type_predator_id from Online-only Table 3

gear_type_predator_id2

This id number corresponds with the gear_type_predator_id from Online-only Table 3; this attribute is required if there are at least 2 types of gear used to sample predators

gear_type_predator_id3

This id number corresponds with the gear_type_predator_id from Online-only Table 3; this attribute is required if there are at least 3 types of gear used to sample predators

gear_type_predator_id4

This id number corresponds with the gear_type_predator_id from Online-only Table 3; this attribute is required if there are at least 4 types of gear used to sample predators

gear_type_predator_id5

This id number corresponds with the gear_type_predator_id from Online-only Table 3; this attribute is required if there are at least 5 types of gear used to sample predators

prey_lowest_taxonomic_level

The lowest taxonomic level reported in the source; if a source reports to the species level then this attribute includes both the genus and species names (e.g., Calanus pacificus); in some cases the lowest taxonomic level is not a scientific name – like ‘gelatinous’ or ‘zooplankton_collective’ or ‘miscellaneous’

prey_kingdom

The kingdom based on the lowest taxonomic level

prey_phylum

The phylum based on the lowest taxonomic level

prey_class

The class based on the lowest taxonomic level

prey_order

The order based on the lowest taxonomic level

prey_family

The family based on the lowest taxonomic level

prey_genus

The genus based on the lowest taxonomic level

prey_species

The species based on the lowest taxonomic level

prey_life_stage

The prey life stage

prey_life_stage_min

If there are a mixture of life stages, then this attribute represents the minimum life stage

prey_life_stage_max

If there are a mixture of life stages, then this attribute represents the maximum life stage

prey_length_value_mm

The length of prey in millimeters; only reported if there is no other way to determine life stage, or if length or weight categories are the only way to uniquely identify samples of prey data from a source

prey_length_min_mm

The minimum length of prey in millimeters if there are a range of sizes; only reported if there is no other way to determine life stage, or if length or weight categories are the only way to uniquely identify samples of prey data from a source

prey_length_max_mm

The maximum length of prey in millimeters if there are a range of sizes; only reported if there is no other way to determine life stage, or if length or weight categories are the only way to uniquely identify samples of prey data from a source

prey_weight_value_mg

The weight of prey in milligrams; only reported if there is no other way to determine life stage, or if length or weight categories are the only way to uniquely identify samples of prey data from a source

prey_weight_min_mg

The minimum weight of prey in milligrams if there are a range of sizes; only reported if there is no other way to determine life stage, or if length or weight categories are the only way to uniquely identify samples of prey data from a source

prey_weight_max_mg

The maximum weight of prey in milligrams if there are a range of sizes; only reported if there is no other way to determine life stage, or if length or weight categories are the only way to uniquely identify samples of prey data from a source

prey_sex

Either ‘male’, ‘female’ or ‘unspecified’

prey_subsample_id

A unique number that is generated and assigned to prey samples if a source reports the biological parameters of individual prey with no unique identifiers; values are assigned for each source starting from 1 and increasing by a value of 1 each time (e.g., 1,2,3…)

prey_replicates

The total number of prey replicates per sample

prey_notes

Any additional comments on the prey

gear_type_prey_id1

This id number corresponds with the gear_type_prey_id from Online-only Table 6; if the prey is part of a diet data sample then the id should be 1 which corresponds to the ‘predator’ gear type (i.e. sample came from a predator stomach)

gear_type_prey_id2

This id number corresponds with the gear_type_prey_id from Online-only Table 6; this attribute is required if there are at least 2 types of gear used to sample predators

gear_type_prey_id3

This id number corresponds with the gear_type_prey_id from Online-only Table 6; this attribute is required if there are at least 3 types of gear used to sample predators

gear_type_prey_id4

This id number corresponds with the gear_type_prey_id from Online-only Table 6; this attribute is required if there are at least 4 types of gear used to sample predators

gear_type_prey_id5

This id number corresponds with the gear_type_prey_id from Online-only Table 6; this attribute is required if there are at least 5 types of gear used to sample predators

biological_parameter

The prey biological parameter reported in the source (e.g., body length, body weight)

prey_bio_notes

Any additional comments on the prey biological parameters

value

The biological parameter value

mean

The biological parameter mean

error

The error associated with the biological parameter mean

min

If there are a range of values for the biological parameter this attribute represents the minimum value

max

If there are a range of values for the biological parameter this attribute represents the maximum value

units

The units associated with the biological parameter; units are fully spelled and plural (e.g., centimeters instead of centimeter)

  1. This data could come from diet samples or from environmental samples of potential prey items. This table corresponds to the ‘Prey_biological_data’ file in the figshare repository.