Maternal and interannual comparison of the ovulatory periodicity, egg production and egg quality of the batch‐spawning yellowtail flounder

Abstract

Estimates of the ovulatory periodicity of yellowtail flounder indicate that a 1-day interval, which predominated over all other intervals, may characterize regular ovulation patterns. Females produced a mean number of 14-22 batches in 1994 and 1995, respectively. Batch fecundities usually remained within a range of 10 000-60 000 eggs. Mean egg production increased from 549 756 eggs per female in 1994 to 1 186 881 eggs in 1995. Mean fertilization rates rose interannually from 38 to 57%, while hatching rates, tested in 1994, had a mean of 63%. Maternal variation in egg production and egg quality was large and independent of size differences among females. Some females had disrupted ovulation patterns which affected the realization of potential fecundity contained within the prespawning ovary. High interbatch variation in egg quality was not related to progressive decreases in egg diameter and dry weight over time. Batches with high survival rates appeared at random within a female's duration of ovulation.1998 The Fisheries Society of the British Isles

Assessment of egg quality and realised fecundity of whiting Merlangius merlangus L. in captivity

“…1); this pattern was also reported for cod (Kjesbu, 1989). The small size of egg batches released over numerous daily spawning events has been suggested as a reproductive strategy of the species to increase mating opportunities (Manning and Crim, 1998). In the present study the contribution of individual females to production was not assessed, as single spawning pairs were not used.…”

“…Decreasing egg size through the spawning season has also been described in cod (Kjesbu, 1989), haddock (Hislop et al, 1978) and in halibut Hippoglossus hippoglossus L. (Kjørsvik et al, 1987). Smaller egg sizes later in the spawning season are also produced in other batch spawners such as yellowtail flounder Limanda ferruginea (Storer) and sole Solea solea L. (Bromley et al, 1986;Manning and Crim, 1998). This has been associated with the nutritional status of the broodstock (Kjesbu et al, 1991;Hsiao et al, 1994).…”

Puberty and recrudescence in cultured male yellowtail flounder: plasma androgens and spermatogenesis

“…The timing of full maturity was synchronized with the early part of the spawning period demonstrated by adult yellowtail flounder in captivity (i.e. mid May or June to late August, Manning & Crim, 1998). It should be noted that recrudescing 2þ year males entered a full spermiation phase as early as April, well in advance of spawning.…”

“…OP, onset of puberty. Shaded areas indicate egg production periods of females in captivity reported by Manning & Crim (1998). six 1998 males sampled at full maturity in June, 2000.…”

Reproductive dynamics of Pacific sanddab, Citharichthys sordidus, off the central coast of California

“…However, larger females are increasingly shown to contribute disproportionately to production both in terms of quantity and quality of offspring (see Hixon et al, 2014). While batch fecundities among female Pacific sanddab of all sizes were generally modest compared to some determinate batch-spawning flatfish species (10,000-20,000 eggs in yellowtail flounder [Limanda ferruginea; (Manning and Crim, 1998)] to 400,000 eggs in yellowfin sole [Limanda aspera; (Nichol and Acuna, 2001)]), potential fecundity (PF) estimates were similar (see Nichol and Acuna, 2001). Preliminary examination of maternal effects presented here suggest larger female Pacific sanddabs spawned more frequently over a longer period of time compared to smaller females, a pattern frequently observed in other batch-spawning species (Ganias et al, 2007a;Klibansky and Scharf, 2013).…”