High temperature is detrimental to captive lumpfish (Cyclopterus lumpus, L) reproductive performance

From gametogenesis to spawning: How climate‐driven warming affects teleost reproductive biology

“…Partial or complete inhibition of ovulation has been observed across taxa, when temperature thresholds are exceeded (Table 1) (Donelson et al ., 2010; Gillet, 1991; Luo et al ., 2017; Pountney et al ., 2020; Soria et al ., 2008; Vikingstad et al ., 2016). Interestingly, when S. alpinus are transferred from 8°C to 5°C, thermal recovery was observed, that is, ovulation was stimulated and synchronized (Gillet, 1991).…”

“…In the same species, constant high temperature at the end of spermatogenesis diminished Spz number (Soria et al ., 2008), and similar observations have been made in A. polyacanthus exposed to 1.5°C and 3°C warmer than reference (Donelson et al ., 2010). Spz density was also reduced in lumpfish ( Cyclopterus lumpus L.) exposed to high temperature (14°C relative to 6°C or 9°C) (Pountney et al ., 2020). Collectively, thermally driven changes during spermatogenesis can result in a lower number of spermiating males, reduction in Spz quantity (suggested by Dorts et al ., 2012; Hani et al ., 2019) and thus a reduction in semen volume across several taxa (Table 4 and Figure 4) (Ashton et al ., 2019; Lahnsteiner & Kletzl, 2012; Targońska et al ., 2014).…”

Intra- and interannual variation in fecundity and egg size of lumpfish (Cyclopterus lumpus) in Iceland

“…Because the actual energy available for reproduction is difficult to forecast at this early stage of ovary development, more oocytes are recruited to the developing pool than could be taken to full development. As ovary development proceeds, the number of oocytes can be reduced, meaning they can be fine-tuned to the actual energy available through reabsorption of a portion of oocytes through atresia (Kraus et al, 2008;van Damme et al, 2009;Nissling et al, 2016). The energy that was invested into those oocytes can then presumably be made available for other purposes.…”

From gametogenesis to spawning: How climate‐driven warming affects teleost reproductive biology

“…Partial or complete inhibition of ovulation has been observed across taxa, when temperature thresholds are exceeded (Table 1) (Donelson et al, 2010;Gillet, 1991;Luo et al, 2017;Pountney et al, 2020;Soria et al, 2008;Vikingstad et al, 2016). Interestingly, when S. alpinus are transferred from 8 C to 5 C, thermal recovery was observed, that is, ovulation was stimulated and synchronized (Gillet, 1991).…”