Método gráfico e estimativa de índice alimentar aplicado no estudo de alimentação de peixes
<abstract language="eng">Using a figure which is a combination of volume percentage (Vi) in the axis of x and frequency of occurrence percentage (Fi) in the axis of y it is possible to obtain paralelograms representing the relative importance of the food items. The paralelogram areas...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Universidade de São Paulo
1980-12-01
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| Series: | Brazilian Journal of Oceanography |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87591980000200043 |
| _version_ | 1818783155248693248 |
|---|---|
| author | E Kawakami G Vazzoler |
| author_facet | E Kawakami G Vazzoler |
| author_sort | E Kawakami |
| collection | DOAJ |
| description | <abstract language="eng">Using a figure which is a combination of volume percentage (Vi) in the axis of x and frequency of occurrence percentage (Fi) in the axis of y it is possible to obtain paralelograms representing the relative importance of the food items. The paralelogram areas are proportional to the volume (%) and frequency of occurrence (%) products; such values are used to calculate a "feeding index" (IAi). This "feeding index'' is proposed as a new method to evaluate the true importance of each food item in the feeding spectrum of each species, as well as to contribute to the understanding of the relationships between several species when applied to fish fauna from the same place and at the same time. |
| first_indexed | 2024-12-18T12:59:42Z |
| format | Article |
| id | doaj.art-262efc9249a845468bf73ddee2aa149a |
| institution | Directory Open Access Journal |
| issn | 1679-8759 1982-436X |
| language | English |
| last_indexed | 2024-12-18T12:59:42Z |
| publishDate | 1980-12-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Brazilian Journal of Oceanography |
| spelling | doaj.art-262efc9249a845468bf73ddee2aa149a2022-12-21T21:07:10ZengUniversidade de São PauloBrazilian Journal of Oceanography1679-87591982-436X1980-12-0129220520710.1590/S1679-87591980000200043Método gráfico e estimativa de índice alimentar aplicado no estudo de alimentação de peixesE KawakamiG Vazzoler<abstract language="eng">Using a figure which is a combination of volume percentage (Vi) in the axis of x and frequency of occurrence percentage (Fi) in the axis of y it is possible to obtain paralelograms representing the relative importance of the food items. The paralelogram areas are proportional to the volume (%) and frequency of occurrence (%) products; such values are used to calculate a "feeding index" (IAi). This "feeding index'' is proposed as a new method to evaluate the true importance of each food item in the feeding spectrum of each species, as well as to contribute to the understanding of the relationships between several species when applied to fish fauna from the same place and at the same time.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87591980000200043 |
| spellingShingle | E Kawakami G Vazzoler Método gráfico e estimativa de índice alimentar aplicado no estudo de alimentação de peixes Brazilian Journal of Oceanography |
| title | Método gráfico e estimativa de índice alimentar aplicado no estudo de alimentação de peixes |
| title_full | Método gráfico e estimativa de índice alimentar aplicado no estudo de alimentação de peixes |
| title_fullStr | Método gráfico e estimativa de índice alimentar aplicado no estudo de alimentação de peixes |
| title_full_unstemmed | Método gráfico e estimativa de índice alimentar aplicado no estudo de alimentação de peixes |
| title_short | Método gráfico e estimativa de índice alimentar aplicado no estudo de alimentação de peixes |
| title_sort | metodo grafico e estimativa de indice alimentar aplicado no estudo de alimentacao de peixes |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87591980000200043 |
| work_keys_str_mv | AT ekawakami metodograficoeestimativadeindicealimentaraplicadonoestudodealimentacaodepeixes AT gvazzoler metodograficoeestimativadeindicealimentaraplicadonoestudodealimentacaodepeixes |