Effect of treatment with LHRH analogue on oocyte maturation, plasma sex steroid levels and egg production in female striped trumpeter Latris lineata (Latrididae)

Morehead, D.T.; Pankhurst, Neville William; Ritar, AJ

doi:10.1016/s0044-8486(98)00374-3

Cited by 43 publications

(23 citation statements)

References 19 publications

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“…Morehead et al (1998) found that in aquaria this inner phase took between 3 and 10 days and that the size of each clutch, based on the volume of ripe eggs released, decreased with each subsequent spawning event within a season. The co-occurrence of hydrated oocytes and post-ovulatory follicles in some histological preparations examined in this study provided evidence that subsequent clutches developed within a reasonably short period of time, given that post-ovulatory follicles typically persist for only 2-3 days after spawning (Macewicz and Hunter, 1993).…”

Section: Discussionmentioning

confidence: 99%

“…Aquaria studies suggest that females have an oocyte development period (from cortical alveoli to hydrated stage) of approximately 3 months (June-August) and a spawning period of approximately 2-2.5 months (September to early November), followed by a dormant period of 6.5-7 months (December-May) (Morehead et al, 1998). In New Zealand waters striped trumpeter are thought to spawn earlier in the year, being described as a winter spawner, though no further details are available (Graham, 1956;Francis, 1988).…”

Section: Discussionmentioning

confidence: 99%

“…Striped trumpeter are currently the focus of aquaculture trials in Tasmania (Bransden et al, 2005;Trotter et al, 2005). These trials have established that females are multiple or batch spawners and that oocyte development is asynchronous (Morehead et al, 1998). The rearing of striped trumpeter larvae has indicated a complex and extended larval phase of up to 9 months prior to settlement, including a postlarval 'paperfish' stage (Morehead, personal communication).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reproductive biology and per-recruit analyses of striped trumpeter (Latris lineata) from Tasmania, Australia: Implications for management

Tracey¹,

Lyle²,

Haddon³

2007

Fisheries Research

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reproductive biology and per-recruit analyses of striped trumpeter (Latris lineata) from Tasmania, Australia: Implications for management

Tracey¹,

Lyle²,

Haddon³

2007

Fisheries Research

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“…Sub‐samples of ova from each female were collected and fertilization (%) was determined on the basis of first cell division after 120 degree‐h, visualized by treatment with a clearing and fixing solution (5:4:6:85 v/v formalin:acetic acid:glycerine:1% NaCl). The diameters of 20 fixed oocytes from each female were determined using the image analysis technique described by Morehead et al (1998). Eyed ova survival (%) was observed directly after 250 degree‐days of incubation.…”

Section: Methodsmentioning

confidence: 99%

Reproductive sensitivity to elevated water temperatures in female Atlantic salmon is heightened at certain stages of vitellogenesis

King

Pankhurst

Watts

2007

Journal of Fish Biology

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In order to compare the effects on reproductive performance of short-term or prolonged exposure to elevated temperatures during vitellogenesis, female Atlantic salmon Salmo salar were held at a water temperature of 22°C for periods of 4 or 6 weeks during the austral summer and autumn. Plasma levels of 17b-oestradiol (E 2 ), testosterone (T) and vitellogenin (Vtg) were monitored and reproductive success was compared to that in groups of fish maintained at 14 or 22°C for 12 weeks from mid-January. Significant endocrine effects were observed within as few as 3 days of the commencement of exposure to 22°C, when plasma levels of E 2 (c. 0Á5 ng ml ÿ1 ) and Vtg (c. 1Á4 mg ml ÿ1 ) were approximately half those observed in fish maintained at 14°C (c. 1Á0 ng ml ÿ1 and 2Á7 mg ml ÿ1 respectively). The fertility and survival to the eyed stage of ova from fish held at 14°C exceeded 85 and 70% respectively, whereas ova from fish held at 22°C for 6 or 12 weeks exhibited significantly reduced fertility (<70 and <45% respectively) and survival (c. 40 and 13% respectively). In spite of significant endocrine effects at all stages, a 4 week exposure to 22°C only generated significant reductions in egg fertility (<65%) and survival (c. 30%) when it occurred between mid-February and mid-March. Together, these data confirm that high temperature spikes can affect reproductive success as strongly as more prolonged exposures, and indicate that there is a critical period of reproductive sensitivity to elevated temperature in late February and early March in this stock of Atlantic salmon.

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“…They are a long-lived fish reaching 25 kg in weight, and are commonly found in depths of 5-300 m at 11-18°C (Tracey and Lyle 2005). Broodstock are currently held at only one location, and four groups of fish, under thermal and photoperiod control, provide a regular supply of good quality fertilised eggs throughout the year (Morehead et al 1998(Morehead et al , 2000. Good progress has been made in understanding the development and early larval rearing requirements for striped trumpeter, but they have an extended post-larval stage and have not proven easy to culture (Trotter et al 2001;Cobcroft et al 2001a, b;Morehead and Hart 2003).…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of striped trumpeter, Latris lineata, embryos to mechanical shock and simulated transport

2008

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The sensitivity of striped trumpeter, Latris lineata, embryos to transport was assessed through mechanical shock at four stages of embryonic development, and simulated transport at different densities and durations. Fertilised egg mortality due to mechanical shock was greatest for embryos shocked 3 and 27 h post-fertilisation (48.6% ± 4.1 and 36.0% ± 3.2, respectively; mean ± SE), and prior to blastopore closure. Mortality of embryos shocked 51 and 75 h post-fertilisation, and following blastopore closure, did not differ from un-shocked controls (9.5% ± 0.7). Density and duration of incubation affected the survival of embryos in a simulated transport trial. Embryonic mortality remained below 3% for all density treatments up to 24 h post-fertilisation. Significant mortality of fertilised eggs occurred when incubated at 5,000 embryos l -1 (17.2% ± 6.9) for 48 h and was correlated with a drop in dissolved oxygen (DO) levels. Final DO concentrations decreased with increasing embryonic density and incubation duration. DO of embryos incubated at 5,000 embryos l -1 was significantly lower than those incubated at 500, 1,000 and 2,500 embryos l -1 , at all incubation durations. Mortality was prevalent in treatments that had a final DO level less than 72% saturation at 14°C. Transportation of fertilised striped trumpeter eggs in seawater is recommended from 51 h post-fertilisation at 14°C, after blastopore closure and neural keel development and at densities of no more than 2,500 embryos l -1 for 24 h transportation duration.

show abstract

Effect of treatment with LHRH analogue on oocyte maturation, plasma sex steroid levels and egg production in female striped trumpeter Latris lineata (Latrididae)

Cited by 43 publications

References 19 publications

Reproductive biology and per-recruit analyses of striped trumpeter (Latris lineata) from Tasmania, Australia: Implications for management

Reproductive biology and per-recruit analyses of striped trumpeter (Latris lineata) from Tasmania, Australia: Implications for management

Reproductive sensitivity to elevated water temperatures in female Atlantic salmon is heightened at certain stages of vitellogenesis

Sensitivity of striped trumpeter, Latris lineata, embryos to mechanical shock and simulated transport

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