Browsing by Subject "marine ecology"
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Item The Effect of Environmental Factors on Chorusing Activity of Soniferous Fishes in Aransas Bay, Texas(2022-05-17) Saldeen, JonathanSeveral species of fish and other aquatic organisms use sound for communication, reproductive signaling and larval recruitment. Soniferous fishes can be monitored using passive acoustic monitoring (PAM). Some species of fish who use sound to reproduce take part in an activity researchers call “chorusing”, which is when a large number of individuals form spawning aggregations and emit noise for a sustained period of time. The species examined in this study are Pogonias cromis (Black Drum), Bairdiella chrysoura (Silver Perch), and Cynoscion nebulosus (Spotted Seatrout). By combining analysis of environmental data and PAM, I studied how changing environmental conditions can affect chorusing species of fish. This study used sound recordings of the aquatic environment from hydrophones mounted on the NERR SWMP station in Aransas Bay, Texas. Environmental data was also collected from the SWMP station in Aransas Bay, Texas. The environmental data collected included water temperature, conductivity, salinity, dissolved oxygen, depth, pH, turbidity, chlorophyll fluorometry, air temperature, barometric pressure, and lunar phase. The data was analyzed using generalized additive modeling (GAM) to determine the marginal effects of the environmental variables on chorusing activity. Water temperature was found to be the most significant predictor of chorusing activity for all three species, and was the only predictor all three species had in common. This finding is especially important in the face of anthropogenic climate change as rapidly changing temperatures could have a significant impact on spawning activity.Item Letter to H.B. Stenzel from Bernhard Kummel on 1949-04-05(1949-04-05) Kummel, BernhardItem Letter to H.B. Stenzel from Harry S. Ladd on 1942-03-14(1942-03-14) Ladd, Harry S.Item Letter to H.B. Stenzel from Harry S. Ladd on 1943-08-17(1943-08-17) Ladd, Harry S.Item Letter to H.B. Stenzel from Harry S. Ladd on 1945-05-24(1945-05-24) Ladd, Harry S.Item Letter to H.B. Stenzel from Harry S. Ladd on 1946-06-20(1946-06-20) Ladd, Harry S.Item Letter to H.S. Ladd from H.B. Stenzel on 1943-05-03(1943-05-03) Stenzel, H.B.Item Letter to Harry S. Ladd from H.B. Stenzel on 1945-06-02(1945-06-02) Stenzel, H.B.Item Letter to Henry B. Stenzel from Harry S. Ladd on 1943-04-26(1943-04-26) Ladd, Harry S.