deep sea predators in irish waters and their trophic ...

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Mar 16, 2016 - Gema Hernandez-Milian, John Brophy, Emer Rogan ... O'Leary, John Boyd, Mark Wildor, Graham Johnson, Roger MacNaughton &. Howard ...
The 30th European Cetacean Society Conference (14th-16th March, 2016)

DEEP SEA PREDATORS IN IRISH WATERS AND THEIR TROPHIC RELEVANCE Gema Hernandez-Milian, John Brophy, Emer Rogan

Introduction:

15th March 2016

Complex area: coastal areas, continental shelf, banks and plateau, trough

High productivity Fisheries & aquaculture: € 1,161 billion (MI 2013) Large trawlers Deep sea fisheries

The 30th European Cetacean Society Conference

Introduction:

15th March 2016

Complex area: coastal areas, continental shelf, banks and plateau, trough

High productivity Fisheries & aquaculture: € 1,161 billion (MI 2013) Large trawlers

AIMS:

Deep sea fisheries

- To understand the food preferences of offshore cetacean species in Irish waters - To investigate potential partitioning in foraging behaviour The 30th European Cetacean Society Conference

Methods:

15th March 2016 BND

WSD SD/CD

PSW

Emmett Johnston

SW UCC ph-library

- Dietary indexes: %F, %N, %W, IRI - Redundancy analysis (RDA) The 30th European Cetacean Society Conference

BW

Results1:

15th March 2016

Predator

Samples

Num prey

Num Fish (%)

Num cephalopods

CD

43

15271

95%

5%

SD

31

5138

73%

17%

WSD

19

812

94%

6%

BND

5

188

76%

24%

SW

2

1070

0

100%

PSW

4

538

13%

87%

NBNW

2

2651

0

100%

CBW

5

51

29%

69%

TBW

3

101

100%

0%

SBW*

1

4

100%

0%

115

25823

19379

6296

The 30th European Cetacean Society Conference

“PELAGIC”

“DEEP”

Results2:

15th March 2016

- Pelagic vs Deep (p