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Marine Biology Graduate Student Association

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Justin D. Hackitt

Justin Hackitt

Fish Ecology Lab
Department of Biology

18111 Nordhoff Street

Northridge, CA 91330-8303
justin.hackitt.492@my.csun.edu

Education

B.S. Marine Biology, California State University, Long Beach, 2011

Research Interests



Effects of lunar phase on settlement and pre-settlement traits of four temperate reef fishes. Depending on the lunar phase, onshore transport may vary in strength and velocity, directly influencing larval supply from the pelagic environment to suitable reefs. Also, without suitable onshore transport, larvae may delay their settlement, increasing their size and age at which they settle to a reef. By examining the lunar influence on settlement rates and settler quality I hope to better evaluate the temporal and spatial variation in larval supply and quality to specific locations. Therefore, I am examining the effects of lunar variation on settlement rate and settler quality of two temperate reef fishes. First, I am looking to see if settlement is more common during specific lunar phases and if the pattern is consistent among the two species. Second, I am testing for differences in settler quality (i.e. size at settlement, pelagic larval duration [PLD], and daily growth rates) among the lunar phases, and evaluate differences among the two species. Since early life history traits are often correlated, I am looking for correlations between size at settlement and PLD and daily growth as well as between PLD and daily growth rates. This will allow me to determine if daily growth rate during the larval phase, while in the pelagic realm, influences the size and age of settlers.

kelp forest
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