Contrasting habitat use of diurnal and nocturnal fish assemblages in temperate Western Australia

2012 ◽  
Vol 426-427 ◽  
pp. 78-86 ◽  
Author(s):  
E.S. Harvey ◽  
J.J. Butler ◽  
D.L. McLean ◽  
J. Shand
2019 ◽  
Vol 95 (4) ◽  
pp. 639-656 ◽  
Author(s):  
Erin L Meyer-Gutbrod ◽  
Li Kui ◽  
Mary M Nishimoto ◽  
Milton S Love ◽  
Donna M Schroeder ◽  
...  

There are thousands of offshore oil and gas platforms worldwide that will eventually become obsolete, and one popular decommissioning alternative is the "rigs to reefs" conversion that designates all or a portion of the underwater infrastructure as an artificial reef, thereby reducing the burden of infrastructure removal. The unique architecture of each platform may influence the size and structure of the associated fish assemblage if different structural elements form distinct habitats for fishes. Using scuba survey data from 11 southern California platforms from 1995 to 2000, we examined fish assemblages associated with structural elements of the structure, including the major horizontal crossbeams outside of the jacket, vertical jacket legs, and horizontal crossbeams that span the jacket interior. Patterns of habitat association were examined among three depth zones: shallow (<16.8 m), midwater (16.8–26 m), and deep (>26 m); and between two life stages: young- of-the-year and non-young-of-the-year. Fish densities tended to be greatest along horizontal beams spanning the jacket interior, relative to either horizontal or vertical beams along the jacket exterior, indicating that the position of the habitat within the overall structure is an important characteristic affecting fish habitat use. Fish densities were also higher in transects centered directly over a vertical or horizontal beam relative to transects that did not contain a structural element. These results contribute to the understanding of fish habitat use on existing artificial reefs, and can inform platform decommissioning decisions as well as the design of new offshore structures intended to increase fish production.


1997 ◽  
Vol 51 (1) ◽  
pp. 64-79 ◽  
Author(s):  
J. Prenda ◽  
P. D. Armitage ◽  
A. Grayston

2017 ◽  
Vol 39 (2) ◽  
pp. 137 ◽  
Author(s):  
Viki A. Cramer ◽  
Martin A. Dziminski ◽  
Richard Southgate ◽  
Fiona M. Carpenter ◽  
Ryan J. Ellis ◽  
...  

Little is known of the area of occupancy, extent of occurrence, abundance, density or habitat use of the greater bilby (Macrotis lagotis) in the north of Western Australia. To seek broad collaborative agreement on a research agenda, the Western Australian Department of Parks and Wildlife hosted a workshop where research priorities were identified through a facilitated process. Five key areas for future research effort were identified: (1) refine survey methods, (2) improve understanding of habitat use, (3) improve understanding of the genetic structure of (meta)populations, (4) improve understanding of the threat posed by introduced predators and herbivores, and (5) improve understanding of how fire regimes affect bilby conservation. A conceptual model describing the main landscape components thought to be influencing distribution is used to reconcile existing knowledge, link research priorities for the bilby in the north of Western Australia, and guide the development of an integrated program of research. The broad nature of the priorities reflects the limited knowledge of bilbies in the north of the state; however, this research program provides an opportunity to increase knowledge to enact both species- and ecosystem-focused approaches to conservation, and potentially contributes towards the implementation of more dynamic conservation approaches for mobile species.


2015 ◽  
Vol 40 (8) ◽  
pp. 941-952 ◽  
Author(s):  
Rosemary Hohnen ◽  
Katherine D. Tuft ◽  
Sarah Legge ◽  
Ian J. Radford ◽  
Scott Carver ◽  
...  

2015 ◽  
Vol 13 (3) ◽  
pp. 579-590 ◽  
Author(s):  
Carolina Rodrigues Bordignon ◽  
Lilian Casatti ◽  
María Angélica Pérez-Mayorga ◽  
Fabrício Barreto Teresa ◽  
Gabriel Lourenço Brejão

The functional structure of communities is commonly measured by the variability in functional traits, which may demonstrate complementarity or redundancy patterns. In this study, we tested the influence of environmental variables on the functional structure of fish assemblages in Amazonian streams within a deforestation gradient. We calculated six ecomorphological traits related to habitat use from each fish species, and used them to calculate the net relatedness index (NRI) and the nearest taxon index (NTI). The set of species that used the habitat differently (complementary or overdispersed assemblages) occurred in sites with a greater proportion of forests. The set of species that used the habitat in a similar way (redundant or clustered assemblages) occurred in sites with a greater proportion of grasses in the stream banks. Therefore, the deforestation of entire watersheds, which has occurred in many Amazonian regions, may be a central factor for the functional homogenization of fish fauna.


Estuaries ◽  
1992 ◽  
Vol 15 (3) ◽  
pp. 368 ◽  
Author(s):  
S. G. Ayvazian ◽  
L. A. Deegan ◽  
J. T. Finn

Hydrobiologia ◽  
2013 ◽  
Vol 724 (1) ◽  
pp. 217-234 ◽  
Author(s):  
Tomáš Jůza ◽  
Mojmír Vašek ◽  
Michal Kratochvíl ◽  
Petr Blabolil ◽  
Martin Čech ◽  
...  

2013 ◽  
Vol 84 (1) ◽  
pp. 247-255 ◽  
Author(s):  
N. Pradella ◽  
A. M. Fowler ◽  
D. J. Booth ◽  
P. I. Macreadie

2021 ◽  
Vol 539 ◽  
pp. 151539
Author(s):  
Claire M. Wellington ◽  
Euan S. Harvey ◽  
Corey B. Wakefield ◽  
Dave Abdo ◽  
Stephen J. Newman

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