nigel.stanger / Digital_Repository
Transfer to URL with SHA Find file
Newer
Older
Digital_Repository / Misc / Mass downloads / UTas / 1591.html
Nigel Stanger on 7 May 2013 36 KB - Imported Misc directory.
Raw Blame History 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
  <head>
    <title>UTas ePrints - Effect of consecutive 9- or 12-month photothermal cycles and handling on sex steroid levels, oocyte development, and reproductive performance in female striped trumpeter Latris lineata (Latrididae)</title>
    <script type="text/javascript" src="http://eprints.utas.edu.au/javascript/auto.js"><!-- padder --></script>
    <style type="text/css" media="screen">@import url(http://eprints.utas.edu.au/style/auto.css);</style>
    <style type="text/css" media="print">@import url(http://eprints.utas.edu.au/style/print.css);</style>
    <link rel="icon" href="/images/eprints/favicon.ico" type="image/x-icon" />
    <link rel="shortcut icon" href="/images/eprints/favicon.ico" type="image/x-icon" />
    <link rel="Top" href="http://eprints.utas.edu.au/" />
    <link rel="Search" href="http://eprints.utas.edu.au/cgi/search" />
    <meta content="Morehead, David T." name="eprints.creators_name" />
<meta content="Ritar, Arthur J." name="eprints.creators_name" />
<meta content="Pankhurst, Neville W." name="eprints.creators_name" />
<meta content="" name="eprints.creators_id" />
<meta content="Arthur.Ritar@utas.edu.au" name="eprints.creators_id" />
<meta content="" name="eprints.creators_id" />
<meta content="article" name="eprints.type" />
<meta content="2007-08-22" name="eprints.datestamp" />
<meta content="2008-01-08 15:30:00" name="eprints.lastmod" />
<meta content="show" name="eprints.metadata_visibility" />
<meta content="Effect of consecutive 9- or 12-month photothermal cycles and handling on sex steroid levels, oocyte development, and reproductive performance in female striped trumpeter Latris lineata (Latrididae)" name="eprints.title" />
<meta content="pub" name="eprints.ispublished" />
<meta content="300701" name="eprints.subjects" />
<meta content="300703" name="eprints.subjects" />
<meta content="restricted" name="eprints.full_text_status" />
<meta content="Teleost; Oocyte development; Plasma steroids; Spawning; Photoperiod; Temperature" name="eprints.keywords" />
<meta content="Duplicate groups of sexually mature striped trumpeter Latris lineata were maintained for two seasons on either a 12-month cycle of ambient temperature (9-18 degrees C) and photoperiod, or a 9-month compressed temperature and photoperiod cycle. One of the duplicates from each cycle was handled frequently (handled) and blood and ovarian samples taken monthly from females until the start of gonadal recrudescence, and then fortnightly until ovulations had ceased. Fish from the other group were not handled (non-handled), except near the end of their spawning seasons to determine which fish had ovulated. Naturally spawned eggs were collected daily from the tanks and hand-stripping was conducted fortnightly in the handled fish during the respective spawning seasons. The 12-month group started spawning in September in both years, whereas the compressed cycle advanced spawning by 1 and 4 months during consecutive seasons, i.e. August 1995 and May 1996. For all handled fish, oocytes developed to late cortical alveoli/early vitellogenic stage, but on average, only 64% of fish continued development through to ovulation. The duration of spawning averaged 45 days for the 9-month and 64 days for the 12-month cycle. The mean volume of eggs produced for each day of production was higher for the handled than the non-handled fish, but there was no difference between cycles (9- and 12-month). Eggs from fish on the 9-month cycle were significantly smaller than from fish on the 12-month cycle. Plasma levels of testosterone (T) and 17beta-oestradiol (E2) in fish from both the 9- and 12-month cycles were at or near their lowest levels at first sampling (<0.3 and 0.5 ng ml -1, respectively) and remained low except for elevations during the 3-4 month period of oocyte maturation and ovulation, when levels peaked at 1.3 and 6.3 ng ml -1, respectively." name="eprints.abstract" />
<meta content="2000" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content="Aquaculture" name="eprints.publication" />
<meta content="189" name="eprints.volume" />
<meta content="3-4" name="eprints.number" />
<meta content="293-305" name="eprints.pagerange" />
<meta content="UNSPECIFIED" name="eprints.thesis_type" />
<meta content="TRUE" name="eprints.refereed" />
<meta content="Barton, B.A., 1997. Stress in finfish: past, present and future — a historical perspective. In: Iwama, G.K., Pickering, A.D., Sumpter, J.P. and Schreck, C.B., Editors, 1997. Fish Stress and Health in Aquaculture, Cambridge Univ. Press, Cambridge, pp. 1–33.
Blythe, W.G., Helfrich, L.A., Libey, G. and Beal, W.E., 1994. Induced maturation of striped bass Morone saxatilis exposed to 6, 9 and 12 month photothermal regimes. J. World Aquacult. Soc. 25, pp. 183–192. 
Blythe, W.G., Helfrich, L.A. and Sullivan, C.V., 1994. Sex steroid hormone and vitellogenin levels in striped bass (Morone saxatilis) maturing under 6-, 9- and 12-month photothermal cycles. Gen. Comp. Endocrinol. 94, pp. 122–134. 
Bon, E., Nunez Rodriguez, J. and Le Menn, F., 1995. The effect of photoperiod on vitellogenin synthesis and oocyte endocytosis in rainbow trout (Oncorhynchus mykiss). In: Goetz, F.W. and Thomas, P., Editors, 1995. Reproductive Physiology of Fish 1995Fish Symposium 95, p. 384 Austin.
Bromage, N. and Jones, J., 1991. The effects of seasonal alterations in ration on fecundity and maturation in rainbow trout (Oncorhynchus mykiss). In: Kime, J.P., Sumpter, J.P., Rolfe, D.E., Scott, M.S. and Sumpter, A.P., Editors, 1991. Reproductive Physiology of Fish 1991Fish Symposium 91, p. 162 Sheffield.
Bye, V.J., 1990. Temperate marine teleosts. In: Munro, A.D., Scott, A.P. and Lam, T.J., Editors, 1990. Reproductive seasonality in teleosts: environmental influences, CRC Press, Boca Raton, FL, pp. 125–143.
Carrillo, M., Bromage, N., Zanuy, S., Serrano, R. and Ramos, J., 1991. Egg quality and fecundity in the sea bass (Dicentrarchus labrax) and the effects of photoperiodically-induced advances and delays of spawning time. In: Kime, J.P., Rolfe, D.E., Scott, M.S. and Sumpter, A.P., Editors, 1991. Reproductive Physiology of Fish 1991Fish Symposium 91, pp. 259–261 Sheffield.
Clearwater, S.J. and Pankhurst, N.W., 1994. Reproductive biology and endocrinology of female red gurnard, Chelidonichthys kumu (Lesson and Garnot) (Family Triglidae), from the Hauraki Gulf, New Zealand. Aust. J. Mar. Freshwater Res. 45, pp. 131–139. 
Davies, B. and Bromage, N.R., 1991. The effects of fluctuating seasonal and constant temperatures on the photoperiodic advancement of reproduction in female rainbow trout. In: Kime, A.P., Rolfe, D.E., Scott, M.S. and Sumpter, A.P., Editors, 1991. Reproductive Physiology of Fish 1991Fish Symposium 91, pp. 154–156 Sheffield.
Davies, B., Randall, C. and Bromage, N.R., 1991. Absolute daylength and the entrainment of an endogenous clock controlling reproduction in the female trout. In: Scott, A.P., Sumpter, J.P., Kime, D.E. and Rolfe, M.S., Editors, 1991. Reproductive Physiology of Fish 1991Fish Symposium 91, p. 166 Sheffield.
Duston, J. and Bromage, N., 1987. The entrainment and free-running of the endogenous circannual clock which coordinates reproduction in the female rainbow trout. In: Idler, D.R., Crim, L.W. and Walsh, J.M., Editors, 1987. Reproductive Physiology of Fish 1987, p. 305 Memorial University of Newfoundland, St. John's.
Fitzpatrick, M.S., Redding, J.M., Ratti, F.D. and Schreck, C.B., 1987. Plasma testosterone concentration predicts the ovulatory response of coho salmon (Oncorhynchus kisutch) to gonadotropin-releasing hormone analog. Can. J. Fish. Aquat. Sci. 44, pp. 1351–1357.
Fostier, A., Jalabert, B., Billard, R., Breton, B. and Zohar, Y., 1983. The gonadal steroids. In: Hoar, W.S., Randall, D.J. and Donaldson, E.M., Editors, 1983. Fish Physiology vol. IXA, Academic Press, New York, pp. 277–372.
Kadmon, G., Yaron, Z. and Gordin, H., 1985. Sequence of gonadal events and oestradiol levels in Sparus aurata (L.) under two photoperiod regimes. J. Fish Biol. 26, pp. 609–620. 
Lam, T.J., 1983. Environmental influences on gonadal activity in fish. In: Hoar, W.S., Randall, D.J. and Donaldson, E.M., Editors, 1983. Fish Physiology vol. IXB, Academic Press, New York, pp. 65–116.
Lamba, V.J., Goswami, S.V. and Sundararaj, B.I., 1983. Circannual and circadian variations in plasma levels of steroids (cortisol, estradiol-17β, estrone and testosterone) correlated with the annual gonadal cycle in the catfish, Heteropneustes fossilis (Bloch). Gen. Comp. Endocrinol. 50, pp. 205–225. 
Last, P.R., Scott, E.O.G. and Talbot, F.H., 1983. In: Fishes of Tasmania, Tasmanian Fisheries Development Authority, Hobart, Tasmania, pp. 400–401.
Morehead, D.T., 1998. Effect of capture, confinement and repeated sampling on plasma steroid concentrations and oocyte size in female striped trumpeter Latris lineata (Latrididae). Mar. Freshwater Res. 49, pp. 373–377. 
Morehead, D.T., Pankhurst, N.W. and Ritar, A.J., 1998. Effect of treatment with LHRH analogue on oocyte maturation, plasma sex steroid levels and egg production in female striped trumpeter Latris lineata (Latrididae). Aquaculture 169, pp. 315–331. 
Norberg, B., Bjornsson, B.T. and Haux, C., 1995. Photoperiod controls the timing of reproduction in Atlantic cod (Gadus morhua). In: Goetz, F.W. and Thomas, P., Editors, 1995. Reproductive Physiology of Fish 1995Fish Symposium 95, pp. 167–169 Austin.
Pankhurst, N.W. and Carragher, J.F., 1991. Seasonal endocrine cycles in marine teleosts. In: Scott, A.P., Sumpter, J.P., Kime, D.E. and Rolfe, M.S., Editors, 1991. Reproductive Physiology of Fish 1991Fish Symposium 91, pp. 131–135 Sheffield.
Pankhurst, N.W. and Carragher, J.F., 1992. Oocyte maturation and changes in plasma steroid levels in snapper Pagrus (=Chrysophrys) auratus (Sparidae) following treatment with human chorionic gonadotropin. Aquaculture 101, pp. 337–347. 
Pankhurst, N.W. and Conroy, A.M., 1987. Seasonal changes in reproductive condition and plasma levels of sex steroids in the blue cod, Parapercis colias (Bloch and Schneider) (Mugiloididae). Fish Physiol. Biochem. 4, pp. 15–26. 
Pankhurst, N.W. and Van Der Kraak, G., 1997. Effects of stress on reproduction and growth of fish. In: Iwama, G.K., Pickering, A.D., Sumpter, J.P. and Schreck, C.B., Editors, 1997. Fish Stress and Health in Aquaculture, Cambridge Univ. Press, Cambridge, pp. 73–93.
Smith, P., Bromage, N., Sheilds, R., Ford, L., Gamble, J., Gillespie, M., Dye, J., Young, C. and Bruce, M., 1991. Photoperiod controls spawning time in the Atlantic halibut (Hippoglossus hippoglossus, L.). In: Scott, A.P., Sumpter, J.P., Kime, D.E. and Rolfe, M.S., Editors, 1991. Reproductive Physiology of Fish 1991Fish Symposium 91, p. 172 Sheffield.
Steel, R.G.D. and Torrie, J.H., 1960. Principles and Procedures of Statistics, McGraw-Hill, New York.
Sumpter, J.P., 1990. General concepts of seasonal reproduction. In: Munro, A.D., Scott, A.P. and Lam, T.J., Editors, 1990. Reproductive Seasonality in Teleosts: Environmental Influences, CRC Press, Boca Raton, FL, pp. 13–31.
Taranger, G.L., Haux, C., Walther, B.Th., Stefansson, S.O., Bjornsson, B.Th. and Hansen, T., 1991. Photoperiodic control of growth, incidence of sexual maturation and ovulation in adult Atlantic salmon. In: Scott, A.P., Sumpter, J.P., Kime, D.E. and Rolfe, M.S., Editors, 1991. Reproductive Physiology of Fish 1991Fish Symposium 91, pp. 145–147 Sheffield.
Tate, A.E. and Helfrich, L.A., 1995. Phase-shifted photothermal cycles advance sexual maturation of Morone hybrids. In: Goetz, F.W. and Thomas, P., Editors, 1995. Reproductive Physiology of Fish 1995Fish Symposium 95, p. 201 Austin.
Underwood, A.J., 1981. Techniques of analysis of variance in experimental marine biology and ecology. Oceanogr. Mar. Biol. 19, pp. 513–605.
Zanuy, S., Carrillo, M. and Ruiz, F., 1986. Delayed gametogenesis and spawning of sea bass (Dicentrarchus labrax L.) kept under different photoperiod and temperature regimes. Fish Physiol. Biochem. 2, pp. 53–56." name="eprints.referencetext" />
<meta content="Morehead, David T. and Ritar, Arthur J. and Pankhurst, Neville W. (2000) Effect of consecutive 9- or 12-month photothermal cycles and handling on sex steroid levels, oocyte development, and reproductive performance in female striped trumpeter Latris lineata (Latrididae). Aquaculture, 189 (3-4). pp. 293-305." name="eprints.citation" />
<meta content="http://eprints.utas.edu.au/1591/1/Morehead_et_al._Consecutive_AQUA_2000_E-prints.doc" name="eprints.document_url" />
<meta content="http://eprints.utas.edu.au/1591/2/Effect_of_consecutive_AQUA_2000.pdf" name="eprints.document_url" />
<link rel="schema.DC" href="http://purl.org/DC/elements/1.0/" />
<meta content="Effect of consecutive 9- or 12-month photothermal cycles and handling on sex steroid levels, oocyte development, and reproductive performance in female striped trumpeter Latris lineata (Latrididae)" name="DC.title" />
<meta content="Morehead, David T." name="DC.creator" />
<meta content="Ritar, Arthur J." name="DC.creator" />
<meta content="Pankhurst, Neville W." name="DC.creator" />
<meta content="300701 Physiology and Genetics" name="DC.subject" />
<meta content="300703 Aquaculture" name="DC.subject" />
<meta content="Duplicate groups of sexually mature striped trumpeter Latris lineata were maintained for two seasons on either a 12-month cycle of ambient temperature (9-18 degrees C) and photoperiod, or a 9-month compressed temperature and photoperiod cycle. One of the duplicates from each cycle was handled frequently (handled) and blood and ovarian samples taken monthly from females until the start of gonadal recrudescence, and then fortnightly until ovulations had ceased. Fish from the other group were not handled (non-handled), except near the end of their spawning seasons to determine which fish had ovulated. Naturally spawned eggs were collected daily from the tanks and hand-stripping was conducted fortnightly in the handled fish during the respective spawning seasons. The 12-month group started spawning in September in both years, whereas the compressed cycle advanced spawning by 1 and 4 months during consecutive seasons, i.e. August 1995 and May 1996. For all handled fish, oocytes developed to late cortical alveoli/early vitellogenic stage, but on average, only 64% of fish continued development through to ovulation. The duration of spawning averaged 45 days for the 9-month and 64 days for the 12-month cycle. The mean volume of eggs produced for each day of production was higher for the handled than the non-handled fish, but there was no difference between cycles (9- and 12-month). Eggs from fish on the 9-month cycle were significantly smaller than from fish on the 12-month cycle. Plasma levels of testosterone (T) and 17beta-oestradiol (E2) in fish from both the 9- and 12-month cycles were at or near their lowest levels at first sampling (<0.3 and 0.5 ng ml -1, respectively) and remained low except for elevations during the 3-4 month period of oocyte maturation and ovulation, when levels peaked at 1.3 and 6.3 ng ml -1, respectively." name="DC.description" />
<meta content="2000" name="DC.date" />
<meta content="Article" name="DC.type" />
<meta content="PeerReviewed" name="DC.type" />
<meta content="application/postscript" name="DC.format" />
<meta content="http://eprints.utas.edu.au/1591/1/Morehead_et_al._Consecutive_AQUA_2000_E-prints.doc" name="DC.identifier" />
<meta content="application/pdf" name="DC.format" />
<meta content="http://eprints.utas.edu.au/1591/2/Effect_of_consecutive_AQUA_2000.pdf" name="DC.identifier" />
<meta content="Morehead, David T. and Ritar, Arthur J. and Pankhurst, Neville W. (2000) Effect of consecutive 9- or 12-month photothermal cycles and handling on sex steroid levels, oocyte development, and reproductive performance in female striped trumpeter Latris lineata (Latrididae). Aquaculture, 189 (3-4). pp. 293-305." name="DC.identifier" />
<meta content="http://eprints.utas.edu.au/1591/" name="DC.relation" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/BibTeX/epprod-eprint-1591.bib" title="BibTeX" type="text/plain" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/ContextObject/epprod-eprint-1591.xml" title="OpenURL ContextObject" type="text/xml" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/ContextObject::Dissertation/epprod-eprint-1591.xml" title="OpenURL Dissertation" type="text/xml" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/ContextObject::Journal/epprod-eprint-1591.xml" title="OpenURL Journal" type="text/xml" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/DC/epprod-eprint-1591.txt" title="Dublin Core" type="text/plain" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/DIDL/epprod-eprint-1591.xml" title="DIDL" type="text/xml" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/EndNote/epprod-eprint-1591.enw" title="EndNote" type="text/plain" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/HTML/epprod-eprint-1591.html" title="HTML Citation" type="text/html; charset=utf-8" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/METS/epprod-eprint-1591.xml" title="METS" type="text/xml" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/MODS/epprod-eprint-1591.xml" title="MODS" type="text/xml" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/RIS/epprod-eprint-1591.ris" title="Reference Manager" type="text/plain" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/Refer/epprod-eprint-1591.refer" title="Refer" type="text/plain" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/Simple/epprod-eprint-1591text" title="Simple Metadata" type="text/plain" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/Text/epprod-eprint-1591.txt" title="ASCII Citation" type="text/plain; charset=utf-8" />
<link rel="alternate" href="http://eprints.utas.edu.au/cgi/export/1591/XML/epprod-eprint-1591.xml" title="EP3 XML" type="text/xml" />

  </head>
  <body bgcolor="#ffffff" text="#000000" onLoad="loadRoutine(); MM_preloadImages('images/eprints/ePrints_banner_r5_c5_f2.gif','images/eprints/ePrints_banner_r5_c7_f2.gif','images/eprints/ePrints_banner_r5_c8_f2.gif','images/eprints/ePrints_banner_r5_c9_f2.gif','images/eprints/ePrints_banner_r5_c10_f2.gif','images/eprints/ePrints_banner_r5_c11_f2.gif','images/eprints/ePrints_banner_r6_c4_f2.gif')">
    
    <div class="ep_noprint"><noscript><style type="text/css">@import url(http://eprints.utas.edu.au/style/nojs.css);</style></noscript></div>




<table width="795" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td><script language="JavaScript1.2">mmLoadMenus();</script>
      <table border="0" cellpadding="0" cellspacing="0" width="795">
        <!-- fwtable fwsrc="eprints_banner_final2.png" fwbase="ePrints_banner.gif" fwstyle="Dreamweaver" fwdocid = "1249563342" fwnested="0" -->
        <tr>
          <td><img src="/images/eprints/spacer.gif" width="32" height="1" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="104" height="1" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="44" height="1" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="105" height="1" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="41" height="1" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="16" height="1" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="68" height="1" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="68" height="1" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="68" height="1" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="82" height="1" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="69" height="1" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="98" height="1" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="1" height="1" border="0" alt="" /></td>
        </tr>
        <tr>
          <td colspan="12"><img name="ePrints_banner_r1_c1" src="/images/eprints/ePrints_banner_r1_c1.gif" width="795" height="10" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="1" height="10" border="0" alt="" /></td>
        </tr>
        <tr>
          <td rowspan="6"><img name="ePrints_banner_r2_c1" src="/images/eprints/ePrints_banner_r2_c1.gif" width="32" height="118" border="0" alt="" /></td>
          <td rowspan="5"><a href="http://www.utas.edu.au/"><img name="ePrints_banner_r2_c2" src="/images/eprints/ePrints_banner_r2_c2.gif" width="104" height="103" border="0" alt="" /></a></td>
          <td colspan="10"><img name="ePrints_banner_r2_c3" src="/images/eprints/ePrints_banner_r2_c3.gif" width="659" height="41" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="1" height="41" border="0" alt="" /></td>
        </tr>
        <tr>
          <td colspan="3"><a href="http://eprints.utas.edu.au/"><img name="ePrints_banner_r3_c3" src="/images/eprints/ePrints_banner_r3_c3.gif" width="190" height="31" border="0" alt="" /></a></td>
          <td rowspan="2" colspan="7"><img name="ePrints_banner_r3_c6" src="/images/eprints/ePrints_banner_r3_c6.gif" width="469" height="37" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="1" height="31" border="0" alt="" /></td>
        </tr>
        <tr>
          <td colspan="3"><img name="ePrints_banner_r4_c3" src="/images/eprints/ePrints_banner_r4_c3.gif" width="190" height="6" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="1" height="6" border="0" alt="" /></td>
        </tr>
        <tr>
          <td colspan="2"><img name="ePrints_banner_r5_c3" src="/images/eprints/ePrints_banner_r5_c3.gif" width="149" height="1" border="0" alt="" /></td>
          <td rowspan="2" colspan="2"><a href="/information.html" onMouseOut="MM_swapImgRestore();MM_startTimeout()" onMouseOver="MM_showMenu(window.mm_menu_0821132634_0,0,25,null,'ePrints_banner_r5_c5');MM_swapImage('ePrints_banner_r5_c5','','/images/eprints/ePrints_banner_r5_c5_f2.gif',1);"><img name="ePrints_banner_r5_c5" src="/images/eprints/ePrints_banner_r5_c5.gif" width="57" height="25" border="0" alt="About" /></a></td>
          <td rowspan="2"><a href="/view/" onMouseOut="MM_swapImgRestore();MM_startTimeout()" onMouseOver="MM_showMenu(window.mm_menu_0821133021_1,0,25,null,'ePrints_banner_r5_c7');MM_swapImage('ePrints_banner_r5_c7','','/images/eprints/ePrints_banner_r5_c7_f2.gif',1);"><img name="ePrints_banner_r5_c7" src="/images/eprints/ePrints_banner_r5_c7.gif" width="68" height="25" border="0" alt="Browse" /></a></td>
          <td rowspan="2"><a href="/perl/search/simple" onMouseOut="MM_swapImgRestore();MM_startTimeout()" onMouseOver="MM_showMenu(window.mm_menu_0821133201_2,0,25,null,'ePrints_banner_r5_c8');MM_swapImage('ePrints_banner_r5_c8','','/images/eprints/ePrints_banner_r5_c8_f2.gif',1);"><img name="ePrints_banner_r5_c8" src="/images/eprints/ePrints_banner_r5_c8.gif" width="68" height="25" border="0" alt="Search" /></a></td>
          <td rowspan="2"><a href="/perl/register" onMouseOut="MM_swapImgRestore();MM_startTimeout();" onMouseOver="MM_showMenu(window.mm_menu_1018171924_3,0,25,null,'ePrints_banner_r5_c9');MM_swapImage('ePrints_banner_r5_c9','','/images/eprints/ePrints_banner_r5_c9_f2.gif',1);"><img name="ePrints_banner_r5_c9" src="/images/eprints/ePrints_banner_r5_c9.gif" width="68" height="25" border="0" alt="register" /></a></td>
          <td rowspan="2"><a href="/perl/users/home" onMouseOut="MM_swapImgRestore();MM_startTimeout()" onMouseOver="MM_showMenu(window.mm_menu_0821133422_4,0,25,null,'ePrints_banner_r5_c10');MM_swapImage('ePrints_banner_r5_c10','','/images/eprints/ePrints_banner_r5_c10_f2.gif',1);"><img name="ePrints_banner_r5_c10" src="/images/eprints/ePrints_banner_r5_c10.gif" width="82" height="25" border="0" alt="user area" /></a></td>
          <td rowspan="2"><a href="/help/" onMouseOut="MM_swapImgRestore();MM_startTimeout()" onMouseOver="MM_showMenu(window.mm_menu_0821133514_5,0,25,null,'ePrints_banner_r5_c11');MM_swapImage('ePrints_banner_r5_c11','','/images/eprints/ePrints_banner_r5_c11_f2.gif',1);"><img name="ePrints_banner_r5_c11" src="/images/eprints/ePrints_banner_r5_c11.gif" width="69" height="25" border="0" alt="Help" /></a></td>
          <td rowspan="3" colspan="4"><img name="ePrints_banner_r5_c12" src="/images/eprints/ePrints_banner_r5_c12.gif" width="98" height="40" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="1" height="1" border="0" alt="" /></td>
        </tr>
        <tr>
          <td rowspan="2"><img name="ePrints_banner_r6_c3" src="/images/eprints/ePrints_banner_r6_c3.gif" width="44" height="39" border="0" alt="ePrints home" /></td>
          <td><a href="/" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage('ePrints_banner_r6_c4','','/images/eprints/ePrints_banner_r6_c4_f2.gif',1);"><img name="ePrints_banner_r6_c4" src="/images/eprints/ePrints_banner_r6_c4.gif" width="105" height="24" border="0" alt="ePrints home" /></a></td>
          <td><img src="/images/eprints/spacer.gif" width="1" height="24" border="0" alt="" /></td>
        </tr>
        <tr>
          <td><img name="ePrints_banner_r7_c2" src="/images/eprints/ePrints_banner_r7_c2.gif" width="104" height="15" border="0" alt="" /></td>
          <td colspan="8"><img name="ePrints_banner_r7_c4" src="/images/eprints/ePrints_banner_r7_c4.gif" width="517" height="15" border="0" alt="" /></td>
          <td><img src="/images/eprints/spacer.gif" width="1" height="15" border="0" alt="" /></td>
        </tr>
      </table></td>
  </tr>
    <tr><td><table width="100%" style="font-size: 90%; border: solid 1px #ccc; padding: 3px"><tr>
      <td align="left"><a href="http://eprints.utas.edu.au/cgi/users/home">Login</a> | <a href="http://eprints.utas.edu.au/cgi/register">Create Account</a></td>
      <td align="right" style="white-space: nowrap">
        <form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/search" style="display:inline">
          <input class="ep_tm_searchbarbox" size="20" type="text" name="q" />
          <input class="ep_tm_searchbarbutton" value="Search" type="submit" name="_action_search" />
          <input type="hidden" name="_order" value="bytitle" />
          <input type="hidden" name="basic_srchtype" value="ALL" />
          <input type="hidden" name="_satisfyall" value="ALL" />
        </form>
      </td>
    </tr></table></td></tr>
  <tr>
    <td class="toplinks"><!-- InstanceBeginEditable name="content" -->


<div align="center">
  
  <table width="720" class="ep_tm_main"><tr><td align="left">
    <h1 class="ep_tm_pagetitle">Effect of consecutive 9- or 12-month photothermal cycles and handling on sex steroid levels, oocyte development, and reproductive performance in female striped trumpeter Latris lineata (Latrididae)</h1>
    <p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Morehead, David T.</span> and <span class="person_name">Ritar, Arthur J.</span> and <span class="person_name">Pankhurst, Neville W.</span> (2000) <xhtml:em>Effect of consecutive 9- or 12-month photothermal cycles and handling on sex steroid levels, oocyte development, and reproductive performance in female striped trumpeter Latris lineata (Latrididae).</xhtml:em> Aquaculture, 189 (3-4). pp. 293-305.</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/1591/1/Morehead_et_al._Consecutive_AQUA_2000_E-prints.doc"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_postscript.png" class="ep_doc_icon" border="0" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/1591/1/Morehead_et_al._Consecutive_AQUA_2000_E-prints.doc"><span class="ep_document_citation">Postscript (Author Version)</span></a> - Requires a viewer, such as <a href="http://www.cs.wisc.edu/~ghost/gsview/index.htm">GSview</a><br />128Kb</td></tr><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/1591/2/Effect_of_consecutive_AQUA_2000.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/1591/2/Effect_of_consecutive_AQUA_2000.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />162Kb</td></tr></table><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Duplicate groups of sexually mature striped trumpeter Latris lineata were maintained for two seasons on either a 12-month cycle of ambient temperature (9-18 degrees C) and photoperiod, or a 9-month compressed temperature and photoperiod cycle. One of the duplicates from each cycle was handled frequently (handled) and blood and ovarian samples taken monthly from females until the start of gonadal recrudescence, and then fortnightly until ovulations had ceased. Fish from the other group were not handled (non-handled), except near the end of their spawning seasons to determine which fish had ovulated. Naturally spawned eggs were collected daily from the tanks and hand-stripping was conducted fortnightly in the handled fish during the respective spawning seasons. The 12-month group started spawning in September in both years, whereas the compressed cycle advanced spawning by 1 and 4 months during consecutive seasons, i.e. August 1995 and May 1996. For all handled fish, oocytes developed to late cortical alveoli/early vitellogenic stage, but on average, only 64% of fish continued development through to ovulation. The duration of spawning averaged 45 days for the 9-month and 64 days for the 12-month cycle. The mean volume of eggs produced for each day of production was higher for the handled than the non-handled fish, but there was no difference between cycles (9- and 12-month). Eggs from fish on the 9-month cycle were significantly smaller than from fish on the 12-month cycle. Plasma levels of testosterone (T) and 17beta-oestradiol (E2) in fish from both the 9- and 12-month cycles were at or near their lowest levels at first sampling (&lt;0.3 and 0.5 ng ml -1, respectively) and remained low except for elevations during the 3-4 month period of oocyte maturation and ovulation, when levels peaked at 1.3 and 6.3 ng ml -1, respectively.</p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">Teleost; Oocyte development; Plasma steroids; Spawning; Photoperiod; Temperature</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/300701.html">300000 Agricultural, Veterinary and Environmental Sciences &gt; 300700 Fisheries Sciences &gt; 300701 Physiology and Genetics</a><br /><a href="http://eprints.utas.edu.au/view/subjects/300703.html">300000 Agricultural, Veterinary and Environmental Sciences &gt; 300700 Fisheries Sciences &gt; 300703 Aquaculture</a></td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">1591</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Dr Arthur J Ritar</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">22 Aug 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">09 Jan 2008 02:30</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=1591;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&amp;eprintid=1591">item control page</a></p>
  </td></tr></table>
</div>



    <!-- InstanceEndEditable --></td>
  </tr>
  <tr>
    <td><!-- #BeginLibraryItem "/Library/footer_eprints.lbi" -->
    <table width="795" border="0" align="left" cellpadding="0" class="footer">
  <tr valign="top">
<td colspan="2"><div align="center"><a href="http://www.utas.edu.au">UTAS home</a> | <a href="http://www.utas.edu.au/library/">Library home</a> | <a href="/">ePrints home</a> | <a href="/contact.html">contact</a> | <a href="/information.html">about</a> | <a href="/view/">browse</a> | <a href="/perl/search/simple">search</a> | <a href="/perl/register">register</a> | <a href="/perl/users/home">user area</a> | <a href="/help/">help</a></div><br /></td>
</tr>
<tr><td colspan="2"><p><img src="/images/eprints/footerline.gif" width="100%" height="4" /></p></td></tr>
      <tr valign="top">
        <td width="68%" class="footer">Authorised by the University Librarian<br />
© University of Tasmania ABN 30 764 374 782<br />
      <a href="http://www.utas.edu.au/cricos/">CRICOS Provider Code 00586B</a> | <a href="http://www.utas.edu.au/copyright/copyright_disclaimers.html">Copyright &amp; Disclaimers</a> | <a href="http://www.utas.edu.au/accessibility/index.html">Accessibility</a> | <a href="http://eprints.utas.edu.au/feedback/">Site Feedback</a>  </td>
        <td width="32%"><div align="right">
            <p align="right" class="NoPrint"><a href="http://www.utas.edu.au/"><img src="http://www.utas.edu.au/shared/logos/unioftasstrip.gif" alt="University of Tasmania Home Page" width="260" height="16" border="0" align="right" /></a></p>
            <p align="right" class="NoPrint"><a href="http://www.utas.edu.au/"><br />
            </a></p>
        </div></td>
      </tr>
      <tr valign="top">
        <td><p>  </p></td>
        <td><div align="right"><span class="NoPrint"><a href="http://www.eprints.org/software/"><img src="/images/eprintslogo.gif" alt="ePrints logo" width="77" height="29" border="0" align="bottom" /></a></span></div></td>
      </tr>
    </table>
    <!-- #EndLibraryItem -->
    <div align="center"></div></td>
  </tr>
</table>

  </body>
</html>