Brown trout spawning habitat selection and its effects on egg survival

2015 ◽  
Vol 26 (1) ◽  
pp. 133-140 ◽  
Author(s):  
Zoé Gauthey ◽  
Margaret Lang ◽  
Arturo Elosegi ◽  
Cédric Tentelier ◽  
Jacques Rives ◽  
...  
2013 ◽  
Vol 64 (11) ◽  
pp. 1058 ◽  
Author(s):  
Nils Teichert ◽  
Pierre Valade ◽  
Pierre Bosc ◽  
Marine Richarson ◽  
Philippe Gaudin

Freshwater-fish populations of the Indo-pacific region are characterised by a large proportion of amphidromous species. We analysed the spawning-habitat selection of Sicyopterus lagocephalus (Gobiidae: Sicydiinae) within two rivers of the Reunion Island. Reproduction traces are rare events, so a presence-only sampling procedure was performed to collect egg clutches and a random description of available habitat was conducted to generate pseudo-absence data. Logistic models showed a strong selection for microhabitat variables and mesohabitat units. S. lagocephalus selected areas where availability of potential nests was high (small cobble to small boulder) and where interstitial substratum allowed intragravel flow. Our results suggest that the availability of favourable substratum may be a limiting factor, which could result in occupancy of suboptimal areas. Water depth and velocity had less of an effect on the selection of a spawning area. Higher selection for shallow (<60 cm) and lotic (>30 cm s–1) geomorphic units, with an optimum for riffle and cascade, suggested that mesohabitat could be a satisfactory approach to quickly assess the availability of spawning areas within a watercourse for expertise studies.


2010 ◽  
Vol 19 (3) ◽  
pp. 420-432 ◽  
Author(s):  
D. Ayllón ◽  
A. Almodóvar ◽  
G. G. Nicola ◽  
B. Elvira

2011 ◽  
Vol 31 (3) ◽  
pp. 495-505 ◽  
Author(s):  
Julianne E. Harris ◽  
Joseph E. Hightower

2018 ◽  
Vol 386 ◽  
pp. 98-114 ◽  
Author(s):  
Rafael Muñoz-Mas ◽  
Patricia Marcos-Garcia ◽  
Antonio Lopez-Nicolas ◽  
Francisco J. Martínez-García ◽  
Manuel Pulido-Velazquez ◽  
...  

2012 ◽  
Vol 21 (2) ◽  
pp. 283-292 ◽  
Author(s):  
Javier Gortázar ◽  
Carlos Alonso ◽  
Diego García de Jalón

2001 ◽  
Vol 58 (3) ◽  
pp. 446-457 ◽  
Author(s):  
G R Guensch ◽  
T B Hardy ◽  
R C Addley

We demonstrated the ability of a mechanistic habitat selection model to predict habitat selection of brown trout (Salmo trutta) and mountain whitefish (Prosopium williamsoni) during summer and winter conditions in the Blacksmith Fork River, Utah. By subtracting energy costs and losses from the gross energy intake rate (GEI) obtained through simulation of prey capture, the model calculates the potential net energy intake rate (NEI) of a given stream position, which is essentially the rate of energy intake available for growth and reproduction. The prey capture model incorporates the size, swimming speed, and reaction distance of the fish; the velocity, depth, temperature, and turbidity of the water; and the density and size composition of the drifting invertebrates. The results suggest that during both summer and winter, the brown trout and mountain whitefish in our study reach avoided locations providing low NEI and preferred locations providing a high ratio of NEI to the swimming cost (SC) at the focal position of the fish (NEI/SC). This supports the idea that the drift-feeding fish in this study selected stream positions that provided adequate NEI for the least amount of swimming effort.


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