Size and maturity status of the whale shark ( Rhincodon typus) at Ningaloo Reef in Western Australia
Between 1995 and 1997, 360 observations of whale sharks at Ningaloo Reef revealed that approximately 85% were males (4–12 m TL). Based on the external morphology of claspers, all males 9 m were considered mature. A logistic equation fitted to the percentage of mature males in each size class predict...
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| Veröffentlicht in: | Fisheries research 2007-03, Vol.84 (1), p.81-86 |
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| creator | Norman, Bradley M. Stevens, John D. |
| description | Between 1995 and 1997, 360 observations of whale sharks at Ningaloo Reef revealed that approximately 85% were males (4–12
m TL). Based on the external morphology of claspers, all males 9
m were considered mature. A logistic equation fitted to the percentage of mature males in each size class predicted a length at first maturity (
L
50) of ∼8.0
m TL, while 95% (
L
95) of males were mature by ∼9.0
m TL. Female whale sharks at Ningaloo Reef during this study were generally smaller and ranged in length from 4 to 8
m TL. The small size and general absence of female whale sharks from Ningaloo Reef suggest that the region may be important for feeding rather than breeding. |
| doi_str_mv | 10.1016/j.fishres.2006.11.015 |
| format | Article |
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m TL). Based on the external morphology of claspers, all males <7
m TL were immature. Only 9.3% of males between 7 and 8
m TL were found to be mature, compared to 36.6% of those between 8 and 9
m TL. All but one of the 79 male whale sharks >9
m were considered mature. A logistic equation fitted to the percentage of mature males in each size class predicted a length at first maturity (
L
50) of ∼8.0
m TL, while 95% (
L
95) of males were mature by ∼9.0
m TL. Female whale sharks at Ningaloo Reef during this study were generally smaller and ranged in length from 4 to 8
m TL. The small size and general absence of female whale sharks from Ningaloo Reef suggest that the region may be important for feeding rather than breeding.</description><identifier>ISSN: 0165-7836</identifier><identifier>EISSN: 1872-6763</identifier><identifier>DOI: 10.1016/j.fishres.2006.11.015</identifier><identifier>CODEN: FISRDJ</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Agnatha. Pisces ; Animal, plant and microbial ecology ; Applied ecology ; Biological and medical sciences ; Cetacea ; Ecotourism ; Exploitation and management of natural biological resources (hunting, fishing and exploited populations survey, etc.) ; Fundamental and applied biological sciences. Psychology ; Marine ; Ningaloo Reef ; Rhincodon typus ; Size structure ; Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution ; Whale shark</subject><ispartof>Fisheries research, 2007-03, Vol.84 (1), p.81-86</ispartof><rights>2006</rights><rights>2007 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c370t-4b0e9ed4a8c7258a9bb8aecd073c01f91b79513654a51a3107b4f45fd22089183</citedby><cites>FETCH-LOGICAL-c370t-4b0e9ed4a8c7258a9bb8aecd073c01f91b79513654a51a3107b4f45fd22089183</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.fishres.2006.11.015$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>309,310,314,780,784,789,790,3548,23929,23930,25139,27923,27924,45994</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=18586270$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Norman, Bradley M.</creatorcontrib><creatorcontrib>Stevens, John D.</creatorcontrib><title>Size and maturity status of the whale shark ( Rhincodon typus) at Ningaloo Reef in Western Australia</title><title>Fisheries research</title><description>Between 1995 and 1997, 360 observations of whale sharks at Ningaloo Reef revealed that approximately 85% were males (4–12
m TL). Based on the external morphology of claspers, all males <7
m TL were immature. Only 9.3% of males between 7 and 8
m TL were found to be mature, compared to 36.6% of those between 8 and 9
m TL. All but one of the 79 male whale sharks >9
m were considered mature. A logistic equation fitted to the percentage of mature males in each size class predicted a length at first maturity (
L
50) of ∼8.0
m TL, while 95% (
L
95) of males were mature by ∼9.0
m TL. Female whale sharks at Ningaloo Reef during this study were generally smaller and ranged in length from 4 to 8
m TL. The small size and general absence of female whale sharks from Ningaloo Reef suggest that the region may be important for feeding rather than breeding.</description><subject>Agnatha. Pisces</subject><subject>Animal, plant and microbial ecology</subject><subject>Applied ecology</subject><subject>Biological and medical sciences</subject><subject>Cetacea</subject><subject>Ecotourism</subject><subject>Exploitation and management of natural biological resources (hunting, fishing and exploited populations survey, etc.)</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Marine</subject><subject>Ningaloo Reef</subject><subject>Rhincodon typus</subject><subject>Size structure</subject><subject>Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution</subject><subject>Whale shark</subject><issn>0165-7836</issn><issn>1872-6763</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNqFkE1v1DAQhi0EEkvhJyD5AoJDUjuJP3JCVQUtUtVKBcTRmjhj4iVrL7ZTtPx6Uu1KHDnNHJ53Ph5CXnNWc8bl-bZ2Pk8Jc90wJmvOa8bFE7LhWjWVVLJ9SjYrJyqlW_mcvMh5yxhTSvINGb_4P0ghjHQHZUm-HGgua5dpdLRMSH9PMCPNE6Sf9B29n3ywcYyBlsN-ye8pFHrrww-YY6T3iI76QL9jLpgCvVhySTB7eEmeOZgzvjrVM_Lt08evl9fVzd3V58uLm8q2ipWqGxj2OHagrWqEhn4YNKAdmWot467ng-oFb6XoQHBoOVND5zrhxqZhuue6PSNvj3P3Kf5a1ivMzmeL8wwB45JNw1rJu65bQXEEbYo5J3Rmn_wO0sFwZh6dmq05OTWPTg3nZnW65t6cFkC2MLsEwfr8L6yFlo1iK_fhyOH67YPHZLL1GCyOPqEtZoz-P5v-AiGcj2o</recordid><startdate>20070301</startdate><enddate>20070301</enddate><creator>Norman, Bradley M.</creator><creator>Stevens, John D.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SN</scope><scope>7TN</scope><scope>C1K</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope></search><sort><creationdate>20070301</creationdate><title>Size and maturity status of the whale shark ( Rhincodon typus) at Ningaloo Reef in Western Australia</title><author>Norman, Bradley M. ; Stevens, John D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c370t-4b0e9ed4a8c7258a9bb8aecd073c01f91b79513654a51a3107b4f45fd22089183</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Agnatha. Pisces</topic><topic>Animal, plant and microbial ecology</topic><topic>Applied ecology</topic><topic>Biological and medical sciences</topic><topic>Cetacea</topic><topic>Ecotourism</topic><topic>Exploitation and management of natural biological resources (hunting, fishing and exploited populations survey, etc.)</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Marine</topic><topic>Ningaloo Reef</topic><topic>Rhincodon typus</topic><topic>Size structure</topic><topic>Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution</topic><topic>Whale shark</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Norman, Bradley M.</creatorcontrib><creatorcontrib>Stevens, John D.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ecology Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Fisheries research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Norman, Bradley M.</au><au>Stevens, John D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Size and maturity status of the whale shark ( Rhincodon typus) at Ningaloo Reef in Western Australia</atitle><jtitle>Fisheries research</jtitle><date>2007-03-01</date><risdate>2007</risdate><volume>84</volume><issue>1</issue><spage>81</spage><epage>86</epage><pages>81-86</pages><issn>0165-7836</issn><eissn>1872-6763</eissn><coden>FISRDJ</coden><abstract>Between 1995 and 1997, 360 observations of whale sharks at Ningaloo Reef revealed that approximately 85% were males (4–12
m TL). Based on the external morphology of claspers, all males <7
m TL were immature. Only 9.3% of males between 7 and 8
m TL were found to be mature, compared to 36.6% of those between 8 and 9
m TL. All but one of the 79 male whale sharks >9
m were considered mature. A logistic equation fitted to the percentage of mature males in each size class predicted a length at first maturity (
L
50) of ∼8.0
m TL, while 95% (
L
95) of males were mature by ∼9.0
m TL. Female whale sharks at Ningaloo Reef during this study were generally smaller and ranged in length from 4 to 8
m TL. The small size and general absence of female whale sharks from Ningaloo Reef suggest that the region may be important for feeding rather than breeding.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.fishres.2006.11.015</doi><tpages>6</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0165-7836 |
| ispartof | Fisheries research, 2007-03, Vol.84 (1), p.81-86 |
| issn | 0165-7836 1872-6763 |
| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Agnatha. Pisces Animal, plant and microbial ecology Applied ecology Biological and medical sciences Cetacea Ecotourism Exploitation and management of natural biological resources (hunting, fishing and exploited populations survey, etc.) Fundamental and applied biological sciences. Psychology Marine Ningaloo Reef Rhincodon typus Size structure Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution Whale shark |
| title | Size and maturity status of the whale shark ( Rhincodon typus) at Ningaloo Reef in Western Australia |
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