SCRIPPS INSTITUTION OF OCEANOGRAPHY FACULTY CANDIDATE SEMINAR
DATE: May 7th, Thursday, 12:30 p.m.
LOCATION: Hubbs Hall 4500
*Additionally, a “chalk talk” presentation will be held in Vaughan Hall on May 8th at 3pm
SPEAKER: Lorenzo Ciannelli, Ph.D.
Oregon State University
TITLE: Evolutionary and ecological constraints of fish spawning habitats
For marine fishes, the choice of the spawning location may be the only means to fulfill the dual needs of surviving from the egg to juvenile stage and dispersing across different habitats while minimizing predation and maximizing food intake. Drawing from past and ongoing research projects, in this presentation I will review the factors that affect the choice of fish spawning habitats and propose a framework to distinguish between ecological and evolutionary constraints. I define the former as the boundaries for phenotypically plastic responses to environmental change, in this case the ability of specific genotypes to change their spawning habitat. Evolutionary constraints, on the other hand, refer to aspects of the genetic makeup that limit the rate and direction of adaptive genetic changes in a population across generations; that is, the potential for micro-evolutionary change. Thus, their intensity is inversely related to the level of genetic diversity associated with traits that regulate spawning and developmental phases. I argue that fisheries oceanographers are well aware of, and more deeply focused on, the former set of constraints, while evolutionary biologists are more deeply focused on the latter set of constraints. This proposed framework merges these two viewpoints and provides new insight to study fish habitat selection and adaptability to environmental changes.
Faculty Host: Mark Ohman (email@example.com)