Evidence of different feeding rates within an anchovy shoal
A single shoal of northern anchovy (Engraulis mordax) was captured and sampled in Baja California, Mexico. The fish were sized, weighed and the first branchial arch of the left side was used for counting the number of gill rakers. The stomach content was weighed and the number of microplankters rec...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
1995-03-01
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| Series: | Ciencias Marinas |
| Subjects: | |
| Online Access: | http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/997 |
| _version_ | 1797278729072803840 |
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| author | C Robinson V Arenas |
| author_facet | C Robinson V Arenas |
| author_sort | C Robinson |
| collection | DOAJ |
| description |
A single shoal of northern anchovy (Engraulis mordax) was captured and sampled in Baja California, Mexico. The fish were sized, weighed and the first branchial arch of the left side was used for counting the number of gill rakers. The stomach content was weighed and the number of microplankters recorded. It was found that the weight of the stomach content increases with fish length as well as the number of microplankters. However, the number of microplankters per gram of fish and stomach content weight decreases with fish length. The number of gill rakers does not increase with fish length. The results follow a similar pattern to that observed using equations obtained from previous laboratory studies. It is suggested that within a shoal of anchovies, composed of differently sized individuals, different rates of feeding may exist.
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| first_indexed | 2024-03-07T16:13:28Z |
| format | Article |
| id | doaj.art-e7ca2802a0894b0db94e1511ebb3dccf |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:13:28Z |
| publishDate | 1995-03-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-e7ca2802a0894b0db94e1511ebb3dccf2024-03-04T16:43:27ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90531995-03-0121310.7773/cm.v21i3.997Evidence of different feeding rates within an anchovy shoalC Robinson0V Arenas1Universidad Nacional Autónoma de MéxicoUniversidad Nacional Autónoma de México A single shoal of northern anchovy (Engraulis mordax) was captured and sampled in Baja California, Mexico. The fish were sized, weighed and the first branchial arch of the left side was used for counting the number of gill rakers. The stomach content was weighed and the number of microplankters recorded. It was found that the weight of the stomach content increases with fish length as well as the number of microplankters. However, the number of microplankters per gram of fish and stomach content weight decreases with fish length. The number of gill rakers does not increase with fish length. The results follow a similar pattern to that observed using equations obtained from previous laboratory studies. It is suggested that within a shoal of anchovies, composed of differently sized individuals, different rates of feeding may exist. http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/997shoalnorthern anchovyfoodcompetition |
| spellingShingle | C Robinson V Arenas Evidence of different feeding rates within an anchovy shoal Ciencias Marinas shoal northern anchovy food competition |
| title | Evidence of different feeding rates within an anchovy shoal |
| title_full | Evidence of different feeding rates within an anchovy shoal |
| title_fullStr | Evidence of different feeding rates within an anchovy shoal |
| title_full_unstemmed | Evidence of different feeding rates within an anchovy shoal |
| title_short | Evidence of different feeding rates within an anchovy shoal |
| title_sort | evidence of different feeding rates within an anchovy shoal |
| topic | shoal northern anchovy food competition |
| url | http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/997 |
| work_keys_str_mv | AT crobinson evidenceofdifferentfeedingrateswithinananchovyshoal AT varenas evidenceofdifferentfeedingrateswithinananchovyshoal |