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Creators/Authors contains: "Stevens, Bradley"

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  1. Declines in commercial crustacean species (such as lobsters, king crab, etc.) have caused an increased interest in the harvest of the red deep-sea crab Chaceon quinquedens. The red deep-sea crab is a federally managed fishery; however, little is known about the species’ general biology, especially the conditions required for larval survival. We aimed to answer two main questions about the life history of the red deep-sea crab. First, is there a common larval hatching pattern between adult female crabs? Specifically, our inquiries are about the duration of the hatching process, daily peak hatching time, and the relationship between female morphometry and the total larvae hatched. Second, which are the factors affecting the survival and development of larval red deep-sea crabs? In order to answer these research questions, we studied the effects of diet (rotifers, Artemia sp., algae, and unfed), temperature (9 °C, 15 °C, and 20 °C), and aquaculture settings. Ovigerous females were obtained from commercial traps and transported to the NOAA James J. Howard Laboratory, NJ. They were placed in the Females Husbandry and Hatching Collection System (FHCS), where the larvae hatched. Hatching of adult females was monitored and measured by volume. A simple linear regression (SLR) was calculated to predict the number of larvae hatched based on the measured volumes, and it was significant (F = 1196; df = 1, 13; R2 = 0.9892, p = 3.498 × 10−14). Duration of hatching period showed an approximate 30 days for adult females red deep-sea crabs, with a common daily maximum hatching time at 22:00 hrs (hatching time seem to follow the sun cycle and the first hours after sunset, Perez, pers. observation). Linear polynomial quadratic regressions were conducted for both years with an interaction term for the two continuous variables (diet and temperature), and were used to model the proportion of larval survival through time. In both years, a highly significant difference was obtained (F = 56.15; df = 4, 2134; R2 = 0.09353; p = < 2.2 × 10−16). There is an effect of diet and temperature in the survival of red deep-sea crabs, but not a combined effect of them. 
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  2. The National Oceanic and Atmospheric Administration (NOAA) Living Marine Resources Cooperative Science Center (LMRCSC) was established in 2001 as a multi-institutional collaborative program with the goal of preparing a diverse future STEM workforce in marine and fisheries sciences. Using best practices for recruiting, mentoring, and training students, the Center has had a significant impact on the number of individuals from underrepresented groups earning degrees in NOAA-related sciences. From 2001 to 2022, the LMRCSC recruited and trained 1,092 students (516 BS, 241 MS, 89 PhD, and 246 non-degree students), and graduated 630 (401 BS/BA, 173 MS/MA, 56 PhD) students. About 77% of the graduates belong to underrepresented groups. Of the LMRCSC graduates, 41 work for NOAA or NOAA contractors. Since 2016, 67 graduate students have taken part in internships at NOAA Laboratories across the United States. Institutional capacities built using NOAA funds have enabled Historically Black Colleges and Universities collaborating with the Center to leverage funds to develop several programs, including a National Science Foundation Research Experiences for Undergraduates site in marine and estuarine science. The NOAA LMRCSC has become a model collaborative educational partnership that should be replicated elsewhere to enhance diversity in STEM disciplines, particularly the geosciences. 
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