Recruitment Variability

Patterns in larval fish assemblages under the influence of the Brazil current

“…These mesoscale features are considered an important exchange mechanism between coastal and oceanic waters, as they alter the specific composition of the ichthyoplankton assemblages (Wroblewski and Cheney, 1984;Olivar and Shelton, 1993;Franco et al, 2006). As the swimming ability of larvae is limited, some additional mechanisms, such as meanders and eddies, are necessary to enable them to move long distances (Houde, 2009). The result of the present study suggests that mesopelagic larvae, especially M. stehmanni, were transported onto the shelf by an eddy of BC, the periphery of which reached the shelf at the northern area during the spring.…”

Spatiotemporal variation in flow-dependent recruitment of long-lived riverine fish: Model development and evaluation

“…Habitat choices by spawning adults may determine the fate of their young (Houde, 2009;Humphries et al, 1999;King et al, 2003;Mion et al, 1998). Because of high vulnerability to extreme flow events, river flow can have larger effects on growth and survival of larval sturgeon than on juveniles and adults (Humphries et al, 1999).…”

“…Cyclic prey population dynamics linked with environmental variability during the transition to the feeding stage ('critical period') has been hypothesized as a dominant driver of recruitment success (Cushing, 1996;Humphries et al, 2013); specifically, survival of larval fish may depend on fast growth via consistent foraging success to avoid size-dependent predation (Houde, 2009).…”

“…Recruitment variability in fish is often regulated by environmental drivers (e.g., water temperature) that affect growth and survival during early life stages (Anderson, 1988;Houde, 1987;Houde, 2009). Cyclic prey population dynamics linked with environmental variability during the transition to the feeding stage ('critical period') has been hypothesized as a dominant driver of recruitment success (Cushing, 1996;Humphries et al, 2013); specifically, survival of larval fish may depend on fast growth via consistent foraging success to avoid size-dependent predation (Houde, 2009).…”

Portfolio theory as a management tool to guide conservation and restoration of multi‐stock fish populations

“…First, recruitment variation of most ecologically and economically important fish populations, including walleye (Mion et al 1998, Roseman 2000 ), appears to be regulated by early life growth and survival. Second, the physical (e.g., wind-driven water circulation, upwelling; Hjort 1914, Lasker 1981, Iles and Sinclair 1982Hjort 1914, Cushing 1990, Carreon-Martinez et al 2014 processes that control early life growth and survival oftentimes are heterogeneous in both space and time (Houde 2008, 2009. In turn, the progeny of spawning stocks that are spatially and (or) temporally segregated would be expected to be strongly regulated by different (localized) processes, resulting in uncorrelated (i.e., asynchronous) recruitment.…”