# Title of Dataset: Energetic consequences of prey type in little penguins (Eudyptula minor)

Summary of dataset: Little penguin animal-borne camera ethograms and prey encounter summaries

Date of data collection: 2015 - 2016

Geographic location of data collection: Gabo Island and London Bridge, Victoria, Australia

## Description of the Data and file structure

1. File List:

A) GI 2016 folder
B) LB 2015 folder
C) prey_captures_summary_Nov_2022.csv


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Data-specific information for: GI (Gabo Island) 2016 and LB (London Bridge) 2015 folders

Each site folder contains folders for each little penguin individual with frame-by-frame ethograms of activity  while the animal was at sea. A row represents a frame from the video footage (28 frames per second)

Data sheets are extracted from Solomon Coder software where each video recording corresponds to its own csv file. Where behaviour is present, values are present in cells. Blank cells represent no data or no behaviour present.

Variable list:

  * Time: running time of video recording (s)

  * Water column behaviour includes:
    *Preening (P) - any preening behaviour on water surface
    *Surface (S) - resting on water surface
    *Diving (D) - swimming at depth 
    *Transiting (T) - swimming on or just below the water surface
    *Ascending (AS) - Ascending up the water column after a dive
    *Descending (DE) - Descending down the water column at the beginning of a dive
  
  *Prey present: Prey item in view. Includes:
    *Anchovy, Pilchard, Sprat, Juvenile clupeoid, Crustacea, Jellyfish, Squid, Unidentifiable, Other prey, Multi-prey 
  
  *Prey abundance: Number of identified prey items in view. Includes:
    *1, 2, 3, 4, 5, school - low density, school - med density, school - high density
  
  *Foraging Behaviour includes:
    *Chase: obvious speed increase towards prey item
    *Strike forward: Attempt to strike for prey item, bill facing forward
    *Strike left: Attempt to strike for prey item, bill facing left
    *Strike right: Atempt to strike for prey item, bill facing right
    *Handling: Prey item in bird mouth and processing/handling behaviour occurring
  
  *Conspecifics/Heterospecifics identifies any non prey items in camera view. Includes:
    *Conspecific (little penguin), shearwater, fur seal, gannet, other, multi heterospecifics
  
  *Cons/Hetero Abundance: Number of conspecifics or heterospecifics in view. Includes values:
    *1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10+
  
  *Comments: any comments related to or to further explain any of the existing variables or note any further observations

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Data-specific information for: Prey_captures_summary_Nov_2022.csv 

Contains all prey encounters for all study individuals (data extracted from the ethograms)

1. Variable list:

  *id2: Individual penguin ID
  
  *sex: penguin sex code
  
  *Prey.type2: Prey item/s identified in camera view
  
  *Prey.abundance: number of identified prey in camera view
  
  *Present: number of frames prey item was only present in camera view (no encounter)
  
  *Chase: number of frames chase occurred during prey encounter
  
  *Chase.time.sec: duration of chase during prey encounter (s)
  
  *Strike: number of frames of strike towards prey item
  
  *Strike.time.s: duration of strike during prey encounter (s)
  
  *Chase+strike: combined number of frames chase and strike occurred during prey encounter
  
  *Chase.strike.time.sec: duration of chase and strike time during prey encounter (s)
  
  *Handling: number of frames penguin was handling/processing prey item
  
  *Handling.time.sec: duration of handling time during prey encounter (s)
  
  *Strike+handling: combined number of frames strike and handling occurred during prey encounter
  
  *Strikehandling.time.sec: duration of strike and handling time during prey encounter (s)
  
  *Total.Foraging: combined number of frames for chase, strike and handling during prey encounter
  
  *Total.Foraging.time.sec: duration of total foraging time (chase, strike, handling, s)
  
  *frames: total number of frames for the prey encounter including prey present
  
  *Colony: site where data was collected
  
  *Mass: mass of penguin (g)
  
  *Bill.length: penguin bill length (mm)
  
  *Bill.width: penguin bill width (mm)
  
  *Head.length: penguin head length (mm)
  
  *Flipper.length: penguin flipper length (mm)
  
  *energy.expended.J.s: energy expended (J/s), calculated from total foraging time and energy expenditure value (20 J/kg/s)
  
  *GE prey type: Gross energy content of prey type (J, estimated from literature)
  
  *FE.J.s: Foraging efficiency (J/s), calculated from GE prey type, energy expended.J.s and total foraging time
  
  *FE.kj.s: Foraging efficiency (kJ/s), calculated by converting J/s to kJ/s
  
  *energy.expended.kJ.s: Energy expended (kJ/s), calculated by converting J/s to kJ/s

2. Specialized formats or other abbreviations used:
F = female, M = male, GI = Gabo Island, LB = London Bridge

## Sharing/access Information

Was data derived from another source? No

If yes, list source(s): NA
