scholarly journals Spatio-temporal dynamics of density-dependent dispersal during a population colonisation

2019 ◽  
Vol 22 (4) ◽  
pp. 634-644 ◽  
Author(s):  
Sebastiano De Bona ◽  
Matthieu Bruneaux ◽  
Alex E. G. Lee ◽  
David N. Reznick ◽  
Paul Bentzen ◽  
...  
Keyword(s):  
Temporal Dynamics ◽  
Density Dependent ◽  
Spatio Temporal ◽  
Density Dependent Dispersal

scholarly journals Spatio-temporal dynamics of a fish predator: Density-dependent and hydrographic effects on Baltic Sea cod population

PLoS ONE ◽  
2017 ◽  
Vol 12 (2) ◽  
pp. e0172004 ◽  
Author(s):  
Valerio Bartolino ◽  
Huidong Tian ◽  
Ulf Bergström ◽  
Pekka Jounela ◽  
Eero Aro ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Temporal Dynamics ◽  
Predator Density ◽  
Fish Predator ◽  
Density Dependent ◽  
Spatio Temporal

scholarly journals Density-independent and density-dependent factors affecting spatio-temporal dynamics of Atlantic cod (Gadus morhua) distribution in the Gulf of Maine

2018 ◽  
Vol 75 (4) ◽  
pp. 1329-1340 ◽  
Author(s):  
Zengguang Li ◽  
Zhenjiang Ye ◽  
Rong Wan ◽  
Kisei R Tanaka ◽  
Robert Boenish ◽  
...  
Keyword(s):  
Gadus Morhua ◽  
Temporal Dynamics ◽  
Gulf Of Maine ◽  
Atlantic Cod ◽  
Cumulative Distribution ◽  
Distribution Area ◽  
Science Center ◽  
Empirical Cumulative Distribution Function ◽  
Density Dependent ◽  
Spatio Temporal

Abstract Due to strong spatial interplays between intraspecific interactions and environmental forcing, both density-dependent and density-independent processes can affect spatio-temporal dynamics of fish populations in a spatially explicit fashion. To this end, this study investigated the underlying mechanisms of spatio-temporal dynamics of Atlantic cod (Gadus morhua) in the Gulf of Maine (GoM). Based on the data from the Northeast Fisheries Science Center (NEFSC) bottom-trawl surveys in spring and fall from 1982 to 2013, empirical cumulative distribution function (ECDF) curves and geographic distribution indices were used to examine the species–environment and abundance–occupancy relationship, respectively. Then, a variable-coefficient generalized additive model was constructed to quantify the simultaneous effects of environmental variables and population size on the spatio-temporal dynamics of cod distribution. Area occupied remained relatively high through the late 1990s, but underwent a pronounced contraction into the western GoM (WGoM) for the reminder of the time-series. The model results suggest that the spatio-temporal dynamics of GoM cod have been driven by complex interactions of density-dependent and density-independent factors over the past three decades. Better knowledge of these dynamics can improve our understanding of the causality of abundance–occupancy and species–environment relationships and help to reduce error estimates for survey-based indices.

Spatial and temporal dynamics of Pacific capelin Mallotus catervarius in the Gulf of Alaska: implications for ecosystem-based fisheries management

2020 ◽  
Vol 637 ◽  
pp. 117-140 ◽  
Author(s):  
DW McGowan ◽  
ED Goldstein ◽  
ML Arimitsu ◽  
AL Deary ◽  
O Ormseth ◽  
...  
Keyword(s):  
Temporal Dynamics ◽  
Marine Ecosystem ◽  
Gulf Of Alaska ◽  
Data Series ◽  
Limited Information ◽  
Important Species ◽  
Multiple Data ◽  
Spatial And Temporal Dynamics ◽  
Spawning Areas ◽  
Spatio Temporal

Pacific capelin Mallotus catervarius are planktivorous small pelagic fish that serve an intermediate trophic role in marine food webs. Due to the lack of a directed fishery or monitoring of capelin in the Northeast Pacific, limited information is available on their distribution and abundance, and how spatio-temporal fluctuations in capelin density affect their availability as prey. To provide information on life history, spatial patterns, and population dynamics of capelin in the Gulf of Alaska (GOA), we modeled distributions of spawning habitat and larval dispersal, and synthesized spatially indexed data from multiple independent sources from 1996 to 2016. Potential capelin spawning areas were broadly distributed across the GOA. Models of larval drift show the GOA’s advective circulation patterns disperse capelin larvae over the continental shelf and upper slope, indicating potential connections between spawning areas and observed offshore distributions that are influenced by the location and timing of spawning. Spatial overlap in composite distributions of larval and age-1+ fish was used to identify core areas where capelin consistently occur and concentrate. Capelin primarily occupy shelf waters near the Kodiak Archipelago, and are patchily distributed across the GOA shelf and inshore waters. Interannual variations in abundance along with spatio-temporal differences in density indicate that the availability of capelin to predators and monitoring surveys is highly variable in the GOA. We demonstrate that the limitations of individual data series can be compensated for by integrating multiple data sources to monitor fluctuations in distributions and abundance trends of an ecologically important species across a large marine ecosystem.

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