Effects of exogenous hormones and broodstock age on the spawning response of captive silver therapon Leiopotherapon plumbeus

Abstract

The silver therapon Leiopotherapon plumbeus (Kner, 1864) is one of the endemic freshwater fish species of economic importance in south Luzon, Philippines and which constitutes the subsistence fishery in lakeshore communities. There has been an increased interest in the artificial propagation of this fish species to compensate for the declining wild fishery catch due, in part, to overfishing, habitat degradation, pollution, introduction of invasive alien species and other anthropogenic activities (Palma et al., 2002). Among wild silver therapon in Taal Lake, sexual maturity has been reported at 70 and 80 mm for females and males, respectively (Denusta et al., 2019). Under captive conditions, hatchery-bred silver therapon reach sexual maturity at 8 months (Aya & Garcia, 2020). This fish species is an asynchronous batch spawner with the potential to reproduce year-round with peaks from March to May (Denusta

Analyses of growth performance and realized heritability of Pampus argenteus in a breeding program in China

“…High CVs indicate that the trait might have sufficient genetic diversity to support selective breeding (Gjedrem and Baranski, 2009), indicating that the body weight trait of P. argenteus might be beneficial to selective breeding. However, there was a phenomenon in this paper that the fertilization rate and hatching rate of P. argenteus were relatively lower than those of other fish (Aya et al, 2022;Vasconcelos et al, 2022). Long reproductive cycle, unsynchronized gonad development, and different peak periods of fertilization and spawning may be the reasons for the low fertilization rate of P. argenteus.…”

Study on growth performance and realized heritability in mass selection strain of silver pomfret (Pampus argenteus)

“…A high fertilization rate and hatching rate will catalyze the industrial development of P. argenteus. However, in the first and second generations, relatively lower fertilization and hatching rates were observed in P. argenteus compared to other fish species (Aya et al, 2022;Nowosad et al, 2023). We speculated that this might be attributed to differences in the timing of spawning and milt expulsion in the P. argenteus (Fennell et al, 2023).…”