Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\24955238
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Aquat+Biosyst
2014 ; 10
(ä): 3
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Interactions of marine mammals and birds with offshore membrane enclosures for
growing algae (OMEGA)
#MMPMID24955238
Hughes SN
; Tozzi S
; Harris L
; Harmsen S
; Young C
; Rask J
; Toy-Choutka S
; Clark K
; Cruickshank M
; Fennie H
; Kuo J
; Trent JD
Aquat Biosyst
2014[]; 10
(ä): 3
PMID24955238
show ga
BACKGROUND: OMEGA is an integrated aquatic system to produce biofuels, treat and
recycle wastewater, capture CO2, and expand aquaculture production. This system
includes floating photobioreactors (PBRs) that will cover hundreds of hectares in
marine bays. To assess the interactions of marine mammals and birds with PBRs, 9
× 1.3 m flat panel and 9.5 × 0.2 m tubular PBRs were deployed in a harbor and
monitored day and night from October 10, 2011 to Janurary 22, 2012 using infrared
video. To observe interactions with pinnipeds, two trained sea lions (Zalophus
californianus) and one trained harbor seal (Phoca vitulina richardii) were
observed and directed to interact with PBRs in tanks. To determine the forces
required to puncture PBR plastic and the effects of weathering, Instron
measurements were made with a sea otter (Enhydra lutris) tooth and bird beaks.
RESULTS: A total of 1,445 interactions of marine mammals and birds with PBRs were
observed in the 2,424 hours of video recorded. The 95 marine mammal interactions,
94 by sea otters and one by a sea lion had average durations of three minutes
(max 44 min) and represented about 1% of total recording time. The 1,350 bird
interactions, primarily coots (Fulica americana) and gulls (Larus occidentalis
and L. californicus) had average durations of six minutes (max. 170) and
represented 5% of recording time. Interactive behaviors were characterized as
passive (feeding, walking, resting, grooming, and social activity) or proactive
(biting, pecking, investigating, and unspecified manipulating). Mammal
interactions were predominantly proactive, whereas birds were passive. All
interactions occurred primarily during the day. Ninety-six percent of otter
interactions occurred in winter, whereas 73% of bird interactions in fall,
correlating to their abundance in the harbor. Trained pinnipeds followed most
commands to bite, drag, and haul-out onto PBRs, made no overt undirected
interactions with the PBRs, but showed avoidance behavior to PBR tethers. Instron
measurements indicated that sea-otter teeth and gull beaks can penetrate
weathered plastic more easily than new plastic. CONCLUSIONS: Otter and bird
interactions with experimental PBRs were benign. Large-scale OMEGA systems are
predicted to have both positive and negative environmental consequences.