Initial assessment of the South African round herring (Etrumeus whiteheadi) resource using data from 1988 to 2010
| dc.contributor.author | De Moor, Carryn L | |
| dc.contributor.author | Butterworth, Doug S | |
| dc.date.accessioned | 2016-03-18T08:12:27Z | |
| dc.date.available | 2016-03-18T08:12:27Z | |
| dc.date.issued | 2010 | |
| dc.date.updated | 2016-03-18T08:09:04Z | |
| dc.description.abstract | An initial assessment of the South African Round Herring (Etrumeus whiteheadi) resource, commonly referred to as Red Eye, has been undertaken. Considering the proportion of females in different reproductive stages, Roel and Melo (1990) report that, although older round herring appear to be reproductively active throughout the year, the smaller, more abundant fish are reproductively active for just a short period in the winter, with a peak in June. Their histological analysis indicated peak spawning in May, July, August and November, with no data available for April, June, September or October. The abundance of round herring eggs and larvae per station from the CELP program (August 1977 - August 1978) indicates a very low level of spawning between January and April, with a peak in egg numbers in August and a peak in larvae in October (van der Westhuizen pers. comm.). Taking this into consideration, together with the timing of the recruit survey, the round herring will be modelled to have an annual birth date of 1 June. The model predicted (just turned) 1 year olds on 1 June will therefore be assumed to correspond with the May survey estimates of recruitment. | |
| dc.identifier.apacitation | De Moor, C. L., & Butterworth, D. S. (2010). <i>Initial assessment of the South African round herring (Etrumeus whiteheadi) resource using data from 1988 to 2010</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/17985 | en_ZA |
| dc.identifier.chicagocitation | De Moor, Carryn L, and Doug S Butterworth <i>Initial assessment of the South African round herring (Etrumeus whiteheadi) resource using data from 1988 to 2010.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2010. http://hdl.handle.net/11427/17985 | en_ZA |
| dc.identifier.citation | de Moor, C. L., & Butterworth, D. S. (2014). Initial Assessment of the South African round herring (Etrumeus whiteheadi) resource using data from 1988 to 2010. MARAM: University of Cape Town. | en_ZA |
| dc.identifier.ris | TY - Working Paper AU - De Moor, Carryn L AU - Butterworth, Doug S AB - An initial assessment of the South African Round Herring (Etrumeus whiteheadi) resource, commonly referred to as Red Eye, has been undertaken. Considering the proportion of females in different reproductive stages, Roel and Melo (1990) report that, although older round herring appear to be reproductively active throughout the year, the smaller, more abundant fish are reproductively active for just a short period in the winter, with a peak in June. Their histological analysis indicated peak spawning in May, July, August and November, with no data available for April, June, September or October. The abundance of round herring eggs and larvae per station from the CELP program (August 1977 - August 1978) indicates a very low level of spawning between January and April, with a peak in egg numbers in August and a peak in larvae in October (van der Westhuizen pers. comm.). Taking this into consideration, together with the timing of the recruit survey, the round herring will be modelled to have an annual birth date of 1 June. The model predicted (just turned) 1 year olds on 1 June will therefore be assumed to correspond with the May survey estimates of recruitment. DA - 2010 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2010 T1 - Initial assessment of the South African round herring (Etrumeus whiteheadi) resource using data from 1988 to 2010 TI - Initial assessment of the South African round herring (Etrumeus whiteheadi) resource using data from 1988 to 2010 UR - http://hdl.handle.net/11427/17985 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/17985 | |
| dc.identifier.vancouvercitation | De Moor CL, Butterworth DS. Initial assessment of the South African round herring (Etrumeus whiteheadi) resource using data from 1988 to 2010. 2010 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17985 | en_ZA |
| dc.language | eng | en_ZA |
| dc.publisher.department | Marine Resource Assessment and Management Group | en_ZA |
| dc.publisher.faculty | Faculty of Science | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.title | Initial assessment of the South African round herring (Etrumeus whiteheadi) resource using data from 1988 to 2010 | en_ZA |
| dc.type | Working Paper | en_ZA |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Research paper | en_ZA |