Efficiency of epibenthic Renfro beam nets for sampling penaeid shrimp
The efficiency of a Renfro beam trawl net was tested in vegetated and nonvegetated habitats of Términos Lagoon, Mexico. The white shrimp, Penaeus setiferus (87%), predominated over the brown shrimp. Penaeus uztecus (13%), in the naked substrate (Palizada Vieja), whereas the pink shrimp, Penaeus duo...
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
1994-03-01
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| Series: | Ciencias Marinas |
| Subjects: | |
| Online Access: | http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/970 |
| _version_ | 1797278672318627840 |
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| author | A Gracia G Hernández-Ferreira R García-del-Real JA Genis-Vargas |
| author_facet | A Gracia G Hernández-Ferreira R García-del-Real JA Genis-Vargas |
| author_sort | A Gracia |
| collection | DOAJ |
| description |
The efficiency of a Renfro beam trawl net was tested in vegetated and nonvegetated habitats of Términos Lagoon, Mexico. The white shrimp, Penaeus setiferus (87%), predominated over the brown shrimp. Penaeus uztecus (13%), in the naked substrate (Palizada Vieja), whereas the pink shrimp, Penaeus duorarum (98%), was the most abundant penaeid shrimp in the habitat with vegetation (Pájaros Island). In the substrate covered by vegetation, only the brown shrimp (2%) was present in addition to pink shrimp. Estimated penaeid shrimp density through the first sample ranged from 1.2 and 1.3 org. rn–2 in Palizada Vieja to 1.8 org. rn–2 at Pájaros Island. The efficiency of the beam trawl net was estimated at 28% in naked substrate when trawlings were done countercurrent. Net efficiency decreased to 17% when trawlings were done along the water flow. Net efficiency on vegetated substrates was estimated at 15%. Size composition of the first tow was significantly different (Χ2, P = 0.05) from the total size distribution of penaeids present in the area enclosed in both substrates, although mean sizes were similar. However, the size distribution obtained with two replicates did not show significant differences in both substrates at the same probability level.
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| first_indexed | 2024-03-07T16:12:37Z |
| format | Article |
| id | doaj.art-0ea615a6a2b841328fb4fa44d552e010 |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:12:37Z |
| publishDate | 1994-03-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-0ea615a6a2b841328fb4fa44d552e0102024-03-04T16:43:36ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90531994-03-0120310.7773/cm.v20i3.970Efficiency of epibenthic Renfro beam nets for sampling penaeid shrimpA Gracia0G Hernández-Ferreira1R García-del-Real2JA Genis-Vargas3Universidad Nacional Autónoma de MéxicoUniversidad Nacional Autónoma de MéxicoUniversidad Nacional Autónoma de MéxicoUniversidad Nacional Autónoma de México The efficiency of a Renfro beam trawl net was tested in vegetated and nonvegetated habitats of Términos Lagoon, Mexico. The white shrimp, Penaeus setiferus (87%), predominated over the brown shrimp. Penaeus uztecus (13%), in the naked substrate (Palizada Vieja), whereas the pink shrimp, Penaeus duorarum (98%), was the most abundant penaeid shrimp in the habitat with vegetation (Pájaros Island). In the substrate covered by vegetation, only the brown shrimp (2%) was present in addition to pink shrimp. Estimated penaeid shrimp density through the first sample ranged from 1.2 and 1.3 org. rn–2 in Palizada Vieja to 1.8 org. rn–2 at Pájaros Island. The efficiency of the beam trawl net was estimated at 28% in naked substrate when trawlings were done countercurrent. Net efficiency decreased to 17% when trawlings were done along the water flow. Net efficiency on vegetated substrates was estimated at 15%. Size composition of the first tow was significantly different (Χ2, P = 0.05) from the total size distribution of penaeids present in the area enclosed in both substrates, although mean sizes were similar. However, the size distribution obtained with two replicates did not show significant differences in both substrates at the same probability level. http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/970sampling effciencyepibenthic postlarvaepenaeidsbeam net |
| spellingShingle | A Gracia G Hernández-Ferreira R García-del-Real JA Genis-Vargas Efficiency of epibenthic Renfro beam nets for sampling penaeid shrimp Ciencias Marinas sampling effciency epibenthic postlarvae penaeids beam net |
| title | Efficiency of epibenthic Renfro beam nets for sampling penaeid shrimp |
| title_full | Efficiency of epibenthic Renfro beam nets for sampling penaeid shrimp |
| title_fullStr | Efficiency of epibenthic Renfro beam nets for sampling penaeid shrimp |
| title_full_unstemmed | Efficiency of epibenthic Renfro beam nets for sampling penaeid shrimp |
| title_short | Efficiency of epibenthic Renfro beam nets for sampling penaeid shrimp |
| title_sort | efficiency of epibenthic renfro beam nets for sampling penaeid shrimp |
| topic | sampling effciency epibenthic postlarvae penaeids beam net |
| url | http://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/970 |
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