Growth and Reproductive Biology of the Freshwater Shrimp Exopalaemon Modestus (Decapoda: Palaemonidae) in a Lake of Korea

Growth and reproductive biology of the amphidromous shrimp Palaemon pandaliformis (Decapoda: Caridea) in a Neotropical river from northeastern Brazil

“…As females of P. pandaliformis exhibited a high reproductive activity throughout the year (see "Reproduction" results section for further details), the investment of energy to optimize the reproductive process probably inhibits growth. According to Jones & Simons (1983) and Oh et al (2002), the growth of females can be expectedly low or reduced during the reproduction period, when they spend more energy on oocytes development and eggs production. On the other hand, RC Mortari (unpub.…”

Ecology of nonnative Siberian prawn (Palaemon modestus) in the lower Snake River, Washington, USA

“…Prawn populations have been found in a broad range of depths and temperatures. Oh et al (2002) reported that Siberian prawns in Young-am Lake, Korea, were found in depths ranging from 0.3 to 8.0 m and Wang et al (2011) similarly collected prawns from a shallow lake in China averaging 8.4 m deep. We collected prawns in depths ranging from 1.8 to 37.8 m, but densities were higher in deeper habitats of both reservoirs.…”

“…The warmer temperatures during the rest of the year were adequate to support growth and reproduction. The maximum temperatures that Siberian prawns can tolerate in their native range (29.5°C, Oh et al 2002;32.1°C, Kim et al 2008) indicate that prawns should not be limited by high temperatures in the Snake River, which generally do not typically exceed 20°C (CBR 2015). Summer temperature differences between Lower Granite and Little Goose Reservoirs may explain differences in prawn abundance between the two reservoirs.…”

“…The successful establishment and growth of prawn populations in Snake River Reservoirs is also probably influenced by the fact that many of their reproductive attributes are similar to those in their native range (Oh et al 2002). Ovigerous females averaged 12.7 mm CL and carried an average of 189 eggs (SD = 55, range N is the number of prawns examined a (egg mass/prawn mass without eggs) 9 100…”

“…Eggs from individual females were removed, counted, and weighed (g, wet). The percent reproductive output of each female prawn was calculated as the total egg mass divided by the mass of the female without eggs multiplied by 100 (Oh et al 2002). We calculated and plotted the monthly percentage of ovigerous prawns [8 mm CL to determine reproduction timing and its peak.…”