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    <title>UTas ePrints - Modelling seasonal catchability of the southern rock lobster Jasus edwardsii by water temperature, moulting, and mating</title>
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    <meta content="Ziegler, Philippe E." name="eprints.creators_name" />
<meta content="Haddon, Malcolm" name="eprints.creators_name" />
<meta content="Frusher, Stewart D." name="eprints.creators_name" />
<meta content="Johnson, Craig R." name="eprints.creators_name" />
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<meta content="Modelling seasonal catchability of the southern rock lobster
Jasus edwardsii by water temperature, moulting, and mating
" name="eprints.title" />
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<meta content="270702" name="eprints.subjects" />
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<meta content="Jasus edwardsii, southern rock lobster" name="eprints.keywords" />
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<meta content="Seasonal variation in catchability of legal-sized
male and female southern rock lobster Jasus edwardsii in
a scientific reserve in south-east Tasmania, Australia,
over a 15-month period was described by modelling the
effects of water temperature, moulting and mating.
Seasonal changes in water temperature described 62% of
the variation of catchability for males, but were a poor
predictor of catchability for females outside winter. Both
moulting and mating was highly synchronised, although
males and females moulted at different times of the year.
This had a significant sex-specific effect on catchability,
because the models developed here indicate that feeding
and therefore catchability is decreased during moulting
and mating and followed by an increased food consumption
to compensate for the lack of feeding during
these periods. Gaussian probability density functions
were used to represent the timing and intensity of moulting,
mating and subsequent compensation periods,
and were combined with the description of seasonal
temperature changes. Four Gaussian functions in
agreement with independent biological data considerably
improved the model fits for the catchability of
males (R2=0.84). Adding a single Gaussian function to
the temperature model, representing a combined moulting
and mating period, provided a good fit to the
variation in catchability of females (R2=0.90). However,
the biological relevance of this model remained
unclear during a second period of moulting and mating
where empirical observations were missing." name="eprints.abstract" />
<meta content="2004-07" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content="Marine Biology" name="eprints.publication" />
<meta content="145" name="eprints.volume" />
<meta content="1" name="eprints.number" />
<meta content="179-190" name="eprints.pagerange" />
<meta content="10.1007/s00227-004-1298-6" name="eprints.id_number" />
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<meta content="http://dx.doi.org/10.1007/s00227-004-1298-6" name="eprints.official_url" />
<meta content="Addison JT (1995) Influence of behavioural interactions on lobster
distribution and abundance as inferred from pot-caught samples.
ICES Mar Sci Symp 199:294-300
Arreguin-Sanchez F (1996) Catchability: a key parameter for fish
stock assessment. Rev Fish Biol Fish 6:221-242
Branford JR (1979) Locomotor activity and food consumption by
the lobster Homarus gammarus. Mar Behav Physiol 6:13-24
Burnham KP, Anderson DR (1998) Model selection and inference.
A practical information-theoretic approach. Springer, Berlin
Heidelberg New York
Caddy JF (1977) Some considerations underlying definitions of
catchability and fishing effort in shellfish fisheries, and their
relevance for stock assessment purposes. Fish Mar Serv Rep No
1489
Campbell A, Noakes DJ, Elner RW (1991) Temperature and lobster,
Homarus americanus, yield relationships. Can J Fish Aquat
Sci 48:2073-2082
Dow RL (1977) Relationship of sea surface temperature to
American and European lobster landings. J Cons Int Explor
Mer 37:186-191
Ennis GP (1973) Food, feeding and condition of lobsters, Homarus
americanus, throughout the seasonal cycle in Bonavista Bay,
Newfoundland. J Fish Res Bd Can 30:1905-1909
Fogarty MJ (1988) Time series models of the Maine lobster fishery:
the effect of temperature. Can J Fish Aquat Sci 45:1145-1153
Frusher SD, Hoenig JM (2001) Impact of size related dominance
hierarchies on selectivity of traps for southern rock lobster
(Jasus edwardsii). Can J Fish Aquat Sci 58:2482-2489
Goni R, Renones O, Quetglas A (2001) Dynamics of a protected
Western Mediterranean population of the European spiny
lobster Palinurus elephas (Fabricius, 1787) assessed by trap
surveys. Mar Freshw Res 52:1577-1588
Joll LM, Phillips BF (1984) Natural diet and growth of juvenile
western rock lobsters Panulirus cygnus George. J Exp Mar Biol
Ecol 75:145-169
Karnofsky EB, Price H J (1989) Behavioural response of the lobster
Homarus americanus to traps. Can J Fish Aquat Sci 46:1625-
1632
Kelly S, MacDiarmid AB, Babcock RC (1999) Characteristics of
spiny lobster, Jasus edwardsii, aggregations in exposed reef and
sandy areas. Mar Freshw Res 50:409-416
Lipcius RN, Herrnkind WF (1982) Moult cycle alterations in
behavior, feeding and diel rhythms of a decapod crustacean, the
spiny lobster Panulirus argus. Mar Biol 68:241-252
189
MacDiarmid AB (1988) Experimental confirmation of external
fertilisation in the southern temperate rock lobster Jasus edwardsii
(Hutton) (Decapoda: Palinuridae). J Exp Mar Biol Ecol
120:277-285
MacDiarmid AB (1989) Moulting and reproduction of the spiny
lobster Jasus edwardsii (Decapoda: Palinuridae) in northern
New Zealand. Mar Biol 103:303-310
MacDiarmid AB (1994) Cohabitation in the spiny lobster Jasus
edwardsii (Hutton, 1975). Crustaceana 66:341-355
Mayfield S, Atkinson LJ, Branch GM, Cockroft AC (2000) Diet of
West Coast rock lobster Jasus lalandii: influence of lobster size,
sex, capture depth, latitude and moult stage. S Afr J Mar Sci
22:57-69
McKoy JL (1979) Mating behaviour and egg laying in captive rock
lobster, Jasus edwardsii (Crustacea: Decapods: Palinuridae). N
Z J Mar Freshw Res 13:407-413
McLeese DW, Wilder DG (1958) The activity and catchability of
the lobster (Homarus americanus) in relation to temperature.
J Fish Res Bd Can 15:1345-1354
Millar RB, Fryer RJ (1999) Estimating the size-selection curves of
towed gears, traps, nets and hooks. Rev Fish Biol Fish 9:89-116
Miller RJ (1990) Effectiveness of crab and lobster traps. Can J Fish
Aquat Sci 47:1228-1251
Miller RJ (1995) Catchability coefficients for American lobster
(Homarus americanus). ICES Mar Sci Symp 199:349-356
Morgan GR (1974) Aspects of the population dynamics of the
western rock lobster, Panulirus cygnus George. II. Seasonal
changes in the catchability coefficient. Aust J Mar Freshw Res
25:249-259
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availability of rock lobster Jasus lalandii on two South African
fishing grounds. Invest Rep Sea Fish Brch S Afr No 107
Paloheimo JE (1963) Estimation of catchabilities and population
sizes of lobsters. J Fish Res Bd Can 20:59-88
Pezzack DS, Duggan DR (1995) Offshore lobster (Homarus
americanus) trap-caught size frequencies and population size
structure. ICES Mar Sci Symp 199:129-138
Pollock DE, DeB Beyers CJ (1979) Trap selectivity and seasonal
catchability of rock lobster Jasus lalandii at Robben Island
sanctuary, near Cape Town. Fish Bull S Afr 12:75-79
Punt AE, Kennedy RB (1997) Population modelling of Tasmanian
rock lobster, Jasus edwardsii, resources. Mar Freshw Res
48:967-980
Smith IP, Collins KJ, Jensen AC (1999) Seasonal changes in the
level and diel pattern of activity in the European lobster
Homarus gammarus. Mar Ecol Prog Ser 186:255-264
Tremblay MJ (2000) Catchability of the lobster (Homarus americanus):
late spring versus autumn. In: Von Vaupel Klein JC,
Schram FR (eds) The biodiversity crisis and crustacea: Proceedings
of the Fourth International Crustacean Congress, vol
2. Balkema, Rotterdam, pp 701-713
Tremblay MJ, Eagles MD (1997) Molt timing and growth of the
lobster, Homarus americanus, off northeastern Cape Breton
Island, Nova Scotia. J Shellfish Res 16:383-394
Turner K., Gardner C, Swain R (2002) Onset of maturity in male
southern rock lobsters Jasus edwardsii in Tasmania, Australia.
Invert Reprod Dev 42:129-135
Williams MJ, Hill BJ (1982) Factors influencing pot catches and
population estimates of the Portunid crab Scylla serrata. Mar
Biol 71:187-192
Ziegler PE, Frusher SD, Johnson CR, Gardner C (2002a) Catchability
of the southern rock lobster Jasus edwardsii: I. Effects of
sex, season and catch history. Mar Freshw Res 53:1143-1148
Ziegler PE, Johnson CR, Frusher SD, Gardner C (2002b) Catchability
of the southern rock lobster Jasus edwardsii: II. Effects of
size. Mar Freshw Res 53:1149-1159
Zoutendyk P (1988) Consumption rates of captive rock lobster
Jasus lalandii. S Afr J Mar Sci 6:267-271" name="eprints.referencetext" />
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<meta content="Seasonal variation in catchability of legal-sized
male and female southern rock lobster Jasus edwardsii in
a scientific reserve in south-east Tasmania, Australia,
over a 15-month period was described by modelling the
effects of water temperature, moulting and mating.
Seasonal changes in water temperature described 62% of
the variation of catchability for males, but were a poor
predictor of catchability for females outside winter. Both
moulting and mating was highly synchronised, although
males and females moulted at different times of the year.
This had a significant sex-specific effect on catchability,
because the models developed here indicate that feeding
and therefore catchability is decreased during moulting
and mating and followed by an increased food consumption
to compensate for the lack of feeding during
these periods. Gaussian probability density functions
were used to represent the timing and intensity of moulting,
mating and subsequent compensation periods,
and were combined with the description of seasonal
temperature changes. Four Gaussian functions in
agreement with independent biological data considerably
improved the model fits for the catchability of
males (R2=0.84). Adding a single Gaussian function to
the temperature model, representing a combined moulting
and mating period, provided a good fit to the
variation in catchability of females (R2=0.90). However,
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    <h1 class="ep_tm_pagetitle">Modelling seasonal catchability of the southern rock lobster Jasus edwardsii by water temperature, moulting, and mating</h1>
    <p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Ziegler, Philippe E.</span> and <span class="person_name">Haddon, Malcolm</span> and <span class="person_name">Frusher, Stewart D.</span> and <span class="person_name">Johnson, Craig R.</span> (2004) <xhtml:em>Modelling seasonal catchability of the southern rock lobster Jasus edwardsii by water temperature, moulting, and mating.</xhtml:em> Marine Biology, 145 (1). pp. 179-190.</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/1116/1/2004_Ziegler%2C_Haddon%2C_Frusher_%26_Johnson_Mar_Biol.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" border="0" class="ep_doc_icon" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/1116/1/2004_Ziegler%2C_Haddon%2C_Frusher_%26_Johnson_Mar_Biol.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />375Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input value="1393" name="docid" accept-charset="utf-8" type="hidden" /><div class=""><input value="Request a copy" name="_action_null" class="ep_form_action_button" onclick="return EPJS_button_pushed( '_action_null' )" type="submit" /> </div></form></td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1007/s00227-004-1298-6">http://dx.doi.org/10.1007/s00227-004-1298-6</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Seasonal variation in catchability of legal-sized&#13;
male and female southern rock lobster Jasus edwardsii in&#13;
a scientific reserve in south-east Tasmania, Australia,&#13;
over a 15-month period was described by modelling the&#13;
effects of water temperature, moulting and mating.&#13;
Seasonal changes in water temperature described 62% of&#13;
the variation of catchability for males, but were a poor&#13;
predictor of catchability for females outside winter. Both&#13;
moulting and mating was highly synchronised, although&#13;
males and females moulted at different times of the year.&#13;
This had a significant sex-specific effect on catchability,&#13;
because the models developed here indicate that feeding&#13;
and therefore catchability is decreased during moulting&#13;
and mating and followed by an increased food consumption&#13;
to compensate for the lack of feeding during&#13;
these periods. Gaussian probability density functions&#13;
were used to represent the timing and intensity of moulting,&#13;
mating and subsequent compensation periods,&#13;
and were combined with the description of seasonal&#13;
temperature changes. Four Gaussian functions in&#13;
agreement with independent biological data considerably&#13;
improved the model fits for the catchability of&#13;
males (R2=0.84). Adding a single Gaussian function to&#13;
the temperature model, representing a combined moulting&#13;
and mating period, provided a good fit to the&#13;
variation in catchability of females (R2=0.90). However,&#13;
the biological relevance of this model remained&#13;
unclear during a second period of moulting and mating&#13;
where empirical observations were missing.</p></div><table style="margin-bottom: 1em" border="0" cellpadding="3" class="not_ep_block"><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">Additional Information:</th><td valign="top" class="ep_row">The original publication is available at www.springerlink.com</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">Jasus edwardsii, southern rock lobster</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/270702.html">270000 Biological Sciences &gt; 270700 Ecology and Evolution &gt; 270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)</a></td></tr><tr><th valign="top" class="ep_row">Collections:</th><td valign="top" class="ep_row">UNSPECIFIED</td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">1116</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">Professor Craig R. Johnson</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">31 May 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">04 Feb 2008 16:23</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=1116;">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=1116">item control page</a></p>
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