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Table 1 A summary of variables tested in the General Additive Mixed Models (GAMMs) including day of year, time of day, the fraction of moon illuminated, and Chlorophyll-a concentration

From: Home sweet home: spatiotemporal distribution and site fidelity of the reef manta ray (Mobula alfredi) in Dungonab Bay, Sudan

Variable

Resolution

Units

Spline

s(Day)

Daily

1–365

Continuous; cubic cyclical, k = 7

s(Hour)

Hourly

0–23

Continuous; cubic cyclical, k = 7

s(Moon)

Daily

0.00–1.00

Continuous; k = 6

s(CHLA)

Daily

0.01

Continuous; k = 7

s(MANTAID)

NA

NA

Fixed; Random effect

Sex

NA

Female/Male

Fixed

Maturity

NA

Immature/Mature

Fixed

nStations

Daily

3–15

Fixed

  1. The models were tested using the individual identity of Mobula alfredi as a random effect in addition to two demographic variables (sex and maturity state) and the number of active receivers (nStations) to account for varying receiver effort due to battery failure