Studies on the biology of the parasitic isopod Cymothoa exigua Schioedte and Meinert, 1884 and it's relationship with the snapper Lutjanus peru (Pisces: Lutjanidae) Nichols and Murphy, 1922, from commercial catch in Michoacan
From commercial catch of the Michoacan fishery, samples of the snapper Lutjanus penu were examined monthly (January to December 1984) for isopod parasites. A total of 236 adult individuals of Cymothoa exigua were found in 165 of the 691 snappers collected. The isopod’s life cycle is described partia...
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Iniversidad Autónoma de Baja California
1992
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oai:cienciasmarinas.com.mx:article-8852020-06-03T00:31:27Z Studies on the biology of the parasitic isopod Cymothoa exigua Schioedte and Meinert, 1884 and it's relationship with the snapper Lutjanus peru (Pisces: Lutjanidae) Nichols and Murphy, 1922, from commercial catch in Michoacan Estudio de la biología del isopodo parásito Cymothoa exigua Schioedte y Meinert, 1884 y su relación con el huachinango Lutjanus peru (Pisces: Lutjanidae) Nichols y Murphy, 1922, a partir de capturas comerciales en Michoacán Ruiz-L, A Madrid-V, J n/a n/a From commercial catch of the Michoacan fishery, samples of the snapper Lutjanus penu were examined monthly (January to December 1984) for isopod parasites. A total of 236 adult individuals of Cymothoa exigua were found in 165 of the 691 snappers collected. The isopod’s life cycle is described partially, with notes about the body index, femininity index, as well as the relative fecundity, marsupial development and pre-hatch mortality. Several indices of parasite occurrence and the values of the condition factor (K) in Lutjanus penu, by sexes and size groups, were estimated to evaluate the effect of the host-parasite relationship. No significant differences were found in the K values, but a decreasing of the values of the occurrence indices for C. exigua was observed in relation to the fish growth. The presence of isopods in L. peru appears slightly harmful to the host, but probably increases the natural mortality rate, especially in the first years of life. Se analizaron siete muestras mensuales (enero a diciembre de 1984) del huachinango Lutjanus penu, obtenidas de las capturas comerciales de Michoacán con el objeto de localizar isópodos parásitos. Se obtuvo un total de 236 adultos de Cymothoa exigua en 165 de los 691 peces examinados. Se describe parcialmente el ciclo de vida del isópodo, con anotaciones correspondientes al índice corporal, índice de feminidad, fecundidad relativa, desarrollo embrionario y mortalidad dentro del marsupio. Para evaluar el efecto de la relación hospedero-parásito se estimaron diversos índices de ocurrencia del parásito y se compararon valores del factor de condición (K) por sexos y grupos de talla. No se encontraron diferencias significativas en los valores de K pero se observó una reducción en los valores de los índices de ocurrencia con relación al crecimiento de los peces. La presencia del isópodo en L. peru no parece causar daños importantes al hospedero, aunque probablemente incrementa la tasa de mortalidad natural, especialmente en los primeros años de vida. Iniversidad Autónoma de Baja California 1992-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/885 10.7773/cm.v18i1.885 Ciencias Marinas; Vol. 18 No. 1 (1992); 19-34 Ciencias Marinas; Vol. 18 Núm. 1 (1992); 19-34 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/885/807 |
| institution |
Ciencias Marinas |
| collection |
OJS |
| language |
eng |
| format |
Online |
| author |
Ruiz-L, A Madrid-V, J |
| spellingShingle |
Ruiz-L, A Madrid-V, J Studies on the biology of the parasitic isopod Cymothoa exigua Schioedte and Meinert, 1884 and it's relationship with the snapper Lutjanus peru (Pisces: Lutjanidae) Nichols and Murphy, 1922, from commercial catch in Michoacan |
| author_facet |
Ruiz-L, A Madrid-V, J |
| author_sort |
Ruiz-L, A |
| title |
Studies on the biology of the parasitic isopod Cymothoa exigua Schioedte and Meinert, 1884 and it's relationship with the snapper Lutjanus peru (Pisces: Lutjanidae) Nichols and Murphy, 1922, from commercial catch in Michoacan |
| title_short |
Studies on the biology of the parasitic isopod Cymothoa exigua Schioedte and Meinert, 1884 and it's relationship with the snapper Lutjanus peru (Pisces: Lutjanidae) Nichols and Murphy, 1922, from commercial catch in Michoacan |
| title_full |
Studies on the biology of the parasitic isopod Cymothoa exigua Schioedte and Meinert, 1884 and it's relationship with the snapper Lutjanus peru (Pisces: Lutjanidae) Nichols and Murphy, 1922, from commercial catch in Michoacan |
| title_fullStr |
Studies on the biology of the parasitic isopod Cymothoa exigua Schioedte and Meinert, 1884 and it's relationship with the snapper Lutjanus peru (Pisces: Lutjanidae) Nichols and Murphy, 1922, from commercial catch in Michoacan |
| title_full_unstemmed |
Studies on the biology of the parasitic isopod Cymothoa exigua Schioedte and Meinert, 1884 and it's relationship with the snapper Lutjanus peru (Pisces: Lutjanidae) Nichols and Murphy, 1922, from commercial catch in Michoacan |
| title_sort |
studies on the biology of the parasitic isopod cymothoa exigua schioedte and meinert, 1884 and it's relationship with the snapper lutjanus peru (pisces: lutjanidae) nichols and murphy, 1922, from commercial catch in michoacan |
| description |
From commercial catch of the Michoacan fishery, samples of the snapper Lutjanus penu were examined monthly (January to December 1984) for isopod parasites. A total of 236 adult individuals of Cymothoa exigua were found in 165 of the 691 snappers collected. The isopod’s life cycle is described partially, with notes about the body index, femininity index, as well as the relative fecundity, marsupial development and pre-hatch mortality. Several indices of parasite occurrence and the values of the condition factor (K) in Lutjanus penu, by sexes and size groups, were estimated to evaluate the effect of the host-parasite relationship. No significant differences were found in the K values, but a decreasing of the values of the occurrence indices for C. exigua was observed in relation to the fish growth. The presence of isopods in L. peru appears slightly harmful to the host, but probably increases the natural mortality rate, especially in the first years of life. |
| publisher |
Iniversidad Autónoma de Baja California |
| publishDate |
1992 |
| url |
https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/885 |
| _version_ |
1715724023703273472 |
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