Effect of light periodicity and intensity on the growth and survival of Heterobranchus longifilis Val. 1840 (Teleostei: Clariidae) larvae after 14 days of rearing

Effect of light periodicity and intensity on the growth and survival of Heterobranchus longifilis Val. 1840 (Teleostei: Clariidae) larvae after 14 days of rearing

Heterobranchus longifilis Val. 1840 larvae were reared under two light intensities, 30 lux and 915 lux, and at varying photoperiods. Results show that maximum survival (82.5 ± 6.5% respectively) at 30 lux was obtained at continuous illumination [24 h light (L)], while the minimum (65 ± 21.2%) was at...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of applied ichthyology 2000-03, Vol.16 (1), p.24-26
Hauptverfasser: Nwosu, By F. M., Holzlöhner, S.
Format: Artikel
Sprache:eng
Schlagworte:
Freshwater
Heterobranchus longifilis
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page 26
container_issue 1
container_start_page 24
container_title Journal of applied ichthyology
container_volume 16
creator Nwosu, By F. M.
Holzlöhner, S.
description Heterobranchus longifilis Val. 1840 larvae were reared under two light intensities, 30 lux and 915 lux, and at varying photoperiods. Results show that maximum survival (82.5 ± 6.5% respectively) at 30 lux was obtained at continuous illumination [24 h light (L)], while the minimum (65 ± 21.2%) was at the 6 h L : 18 h dark (D) treatment. Survival at 24 h D averaged 71.3 ± 6.3%, with no significant difference (P
doi_str_mv 10.1046/j.1439-0426.2000.00145.x
format Article
fullrecord <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_17627813</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>17627813</sourcerecordid><originalsourceid>FETCH-LOGICAL-c3795-33a5a810f758922b6794c1138002dd7cfdbe5052ccd0c9e0ab0a34ee4d12f65a3</originalsourceid><addsrcrecordid>eNqNkc1uEzEUhUeISoTCO3iFYDGDf8b2DGJTRaVpqcqCAkvL8VwnDu44tSdpskPqq_BkPEk9TdU1q3uv7vnO4pyiQARXBNfi46oiNWtLXFNRUYxxhTGpebV7UUyeHy-LCSaSl43g7avidUqrLGxkKybF31NrwQwoWOTdYjmgNUQXOmfcsEe675DrB-jTeIUeDUtAixjuhuXjL23i1m21H-kZDBDDPOreLDcJ-dAvnHXeJfRT-wqRpsbo_TV4CGkA9wlNvY7OdRo-oLxtNSBtswMi9b8_953ep9E0Qhb1izfFkdU-wduneVz8-HJ6PZ2Vl9_Ozqcnl6VhsuUlY5rrhmAredNSOheyrQ0hrMGYdp00tpsDx5wa02HTAtZzrFkNUHeEWsE1Oy7eHXzXMdxuIA3qxiUD3usewiYpIgWVDWFZ2ByEJoaUIli1ju5Gx70iWI21qJUa01dj-mqsRT3WonYZ_XxA75yH_X9z6uLkPC8ZLw-4yzHunnEdfyshmeTq19WZokwwMfv-VQn2AC_-pJw</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>17627813</pqid></control><display><type>article</type><title>Effect of light periodicity and intensity on the growth and survival of Heterobranchus longifilis Val. 1840 (Teleostei: Clariidae) larvae after 14 days of rearing</title><source>Access via Wiley Online Library</source><creator>Nwosu, By F. M. ; Holzlöhner, S.</creator><creatorcontrib>Nwosu, By F. M. ; Holzlöhner, S.</creatorcontrib><description>Heterobranchus longifilis Val. 1840 larvae were reared under two light intensities, 30 lux and 915 lux, and at varying photoperiods. Results show that maximum survival (82.5 ± 6.5% respectively) at 30 lux was obtained at continuous illumination [24 h light (L)], while the minimum (65 ± 21.2%) was at the 6 h L : 18 h dark (D) treatment. Survival at 24 h D averaged 71.3 ± 6.3%, with no significant difference (P &lt; 0.05) in growth of larvae. Maximum larval survival at 915 lux was 87.5 ± 17.7% at the 18 h L treatment. Growth was not significantly different (P &lt; 0.05) in the treatments. Comparison of the two light intensities showed that survival was better at a photoperiod above 12 h irrespective of intensity, while growth was significantly better at the 915 lux intensity.</description><identifier>ISSN: 0175-8659</identifier><identifier>EISSN: 1439-0426</identifier><identifier>DOI: 10.1046/j.1439-0426.2000.00145.x</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Science, Ltd</publisher><subject>Freshwater ; Heterobranchus longifilis</subject><ispartof>Journal of applied ichthyology, 2000-03, Vol.16 (1), p.24-26</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3795-33a5a810f758922b6794c1138002dd7cfdbe5052ccd0c9e0ab0a34ee4d12f65a3</citedby><cites>FETCH-LOGICAL-c3795-33a5a810f758922b6794c1138002dd7cfdbe5052ccd0c9e0ab0a34ee4d12f65a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1046%2Fj.1439-0426.2000.00145.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1046%2Fj.1439-0426.2000.00145.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids></links><search><creatorcontrib>Nwosu, By F. M.</creatorcontrib><creatorcontrib>Holzlöhner, S.</creatorcontrib><title>Effect of light periodicity and intensity on the growth and survival of Heterobranchus longifilis Val. 1840 (Teleostei: Clariidae) larvae after 14 days of rearing</title><title>Journal of applied ichthyology</title><description>Heterobranchus longifilis Val. 1840 larvae were reared under two light intensities, 30 lux and 915 lux, and at varying photoperiods. Results show that maximum survival (82.5 ± 6.5% respectively) at 30 lux was obtained at continuous illumination [24 h light (L)], while the minimum (65 ± 21.2%) was at the 6 h L : 18 h dark (D) treatment. Survival at 24 h D averaged 71.3 ± 6.3%, with no significant difference (P &lt; 0.05) in growth of larvae. Maximum larval survival at 915 lux was 87.5 ± 17.7% at the 18 h L treatment. Growth was not significantly different (P &lt; 0.05) in the treatments. Comparison of the two light intensities showed that survival was better at a photoperiod above 12 h irrespective of intensity, while growth was significantly better at the 915 lux intensity.</description><subject>Freshwater</subject><subject>Heterobranchus longifilis</subject><issn>0175-8659</issn><issn>1439-0426</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNqNkc1uEzEUhUeISoTCO3iFYDGDf8b2DGJTRaVpqcqCAkvL8VwnDu44tSdpskPqq_BkPEk9TdU1q3uv7vnO4pyiQARXBNfi46oiNWtLXFNRUYxxhTGpebV7UUyeHy-LCSaSl43g7avidUqrLGxkKybF31NrwQwoWOTdYjmgNUQXOmfcsEe675DrB-jTeIUeDUtAixjuhuXjL23i1m21H-kZDBDDPOreLDcJ-dAvnHXeJfRT-wqRpsbo_TV4CGkA9wlNvY7OdRo-oLxtNSBtswMi9b8_953ep9E0Qhb1izfFkdU-wduneVz8-HJ6PZ2Vl9_Ozqcnl6VhsuUlY5rrhmAredNSOheyrQ0hrMGYdp00tpsDx5wa02HTAtZzrFkNUHeEWsE1Oy7eHXzXMdxuIA3qxiUD3usewiYpIgWVDWFZ2ByEJoaUIli1ju5Gx70iWI21qJUa01dj-mqsRT3WonYZ_XxA75yH_X9z6uLkPC8ZLw-4yzHunnEdfyshmeTq19WZokwwMfv-VQn2AC_-pJw</recordid><startdate>200003</startdate><enddate>200003</enddate><creator>Nwosu, By F. M.</creator><creator>Holzlöhner, S.</creator><general>Blackwell Science, Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>F1W</scope><scope>H95</scope><scope>H98</scope><scope>L.G</scope></search><sort><creationdate>200003</creationdate><title>Effect of light periodicity and intensity on the growth and survival of Heterobranchus longifilis Val. 1840 (Teleostei: Clariidae) larvae after 14 days of rearing</title><author>Nwosu, By F. M. ; Holzlöhner, S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3795-33a5a810f758922b6794c1138002dd7cfdbe5052ccd0c9e0ab0a34ee4d12f65a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>Freshwater</topic><topic>Heterobranchus longifilis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nwosu, By F. M.</creatorcontrib><creatorcontrib>Holzlöhner, S.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 1: Biological Sciences &amp; Living Resources</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Aquaculture Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><jtitle>Journal of applied ichthyology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nwosu, By F. M.</au><au>Holzlöhner, S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of light periodicity and intensity on the growth and survival of Heterobranchus longifilis Val. 1840 (Teleostei: Clariidae) larvae after 14 days of rearing</atitle><jtitle>Journal of applied ichthyology</jtitle><date>2000-03</date><risdate>2000</risdate><volume>16</volume><issue>1</issue><spage>24</spage><epage>26</epage><pages>24-26</pages><issn>0175-8659</issn><eissn>1439-0426</eissn><abstract>Heterobranchus longifilis Val. 1840 larvae were reared under two light intensities, 30 lux and 915 lux, and at varying photoperiods. Results show that maximum survival (82.5 ± 6.5% respectively) at 30 lux was obtained at continuous illumination [24 h light (L)], while the minimum (65 ± 21.2%) was at the 6 h L : 18 h dark (D) treatment. Survival at 24 h D averaged 71.3 ± 6.3%, with no significant difference (P &lt; 0.05) in growth of larvae. Maximum larval survival at 915 lux was 87.5 ± 17.7% at the 18 h L treatment. Growth was not significantly different (P &lt; 0.05) in the treatments. Comparison of the two light intensities showed that survival was better at a photoperiod above 12 h irrespective of intensity, while growth was significantly better at the 915 lux intensity.</abstract><cop>Oxford, UK</cop><pub>Blackwell Science, Ltd</pub><doi>10.1046/j.1439-0426.2000.00145.x</doi><tpages>3</tpages></addata></record>
fulltext fulltext
identifier ISSN: 0175-8659
ispartof Journal of applied ichthyology, 2000-03, Vol.16 (1), p.24-26
issn 0175-8659
1439-0426
language eng
recordid cdi_proquest_miscellaneous_17627813
source Access via Wiley Online Library
subjects Freshwater
Heterobranchus longifilis
title Effect of light periodicity and intensity on the growth and survival of Heterobranchus longifilis Val. 1840 (Teleostei: Clariidae) larvae after 14 days of rearing
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-02T15%3A52%3A45IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Effect%20of%20light%20periodicity%20and%20intensity%20on%20the%20growth%20and%20survival%20of%20Heterobranchus%20longifilis%20Val.%201840%20(Teleostei:%20Clariidae)%20larvae%20after%2014%E2%80%83days%20of%20rearing&rft.jtitle=Journal%20of%20applied%20ichthyology&rft.au=Nwosu,%20By%20F.%20M.&rft.date=2000-03&rft.volume=16&rft.issue=1&rft.spage=24&rft.epage=26&rft.pages=24-26&rft.issn=0175-8659&rft.eissn=1439-0426&rft_id=info:doi/10.1046/j.1439-0426.2000.00145.x&rft_dat=%3Cproquest_cross%3E17627813%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=17627813&rft_id=info:pmid/&rfr_iscdi=true