Academic Journal
Biometrie sexual and ontogenetic dimorphism on the marine catfish Genidens genidens (Siluriformes, Ariidae) in a tropical estuary
| العنوان: | Biometrie sexual and ontogenetic dimorphism on the marine catfish Genidens genidens (Siluriformes, Ariidae) in a tropical estuary |
|---|---|
| المؤلفون: | Larissa G Paiva, Luana Prestrelo, Kiani M Sant' Anna, Marcelo Vianna |
| المصدر: | Latin American Journal of Aquatic Research, Vol 43, Iss 5, Pp 895-903 (2015) |
| بيانات النشر: | Escuela de Ciencias del Mar, Facultad de Recursos Naturales, Pontificia Universidad Católica de Valparaíso, 2015. |
| سنة النشر: | 2015 |
| المجموعة: | LCC:Aquaculture. Fisheries. Angling LCC:Oceanography LCC:Biology (General) |
| مصطلحات موضوعية: | Genidens genidens, bagre, Teleostei, morfometría, biometría, dimorfismo, estuario tropical, Aquaculture. Fisheries. Angling, SH1-691, Oceanography, GC1-1581, Biology (General), QH301-705.5 |
| الوصف: | This paper aims to study the ontogenetic sexual dimorphism of Genidens genidens in Guanabara Bay, southeastern coast of Brazil. Altogether 378 specimens were anayzed (233 females and 145 males) with total length ranging from 13.3 to 43.5 cm. Specimens were measured for 12 body measurements, sex was identified and maturity stages were recorded and classified. Pearson's linear correlation reveled a significant positive correlation between total length and all other body measures, except for base adipose fin, mouth depth and eye depth for immature females. Analyses nested PERMANOVA desing showed significant differences between maturity stages for each sex, between sexes considering or not maturity stages, indicating a variation in morphometric characteristics driven by sexual dimorphism. Differences among all maturity stages were also found, indicating an ontogenetic morphological difference. But immature individuals didn't differ between sexes indicating that differentiation patterns starts with sexual development. The most important measures differing males and females were related to head characteristics, which appears to be key parameters to evaluate sexual differences. Due to male incubation of fertilized eggs and juvenile individuals |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English Spanish; Castilian |
| تدمد: | 0718-560X |
| Relation: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2015000500009&lng=en&tlng=en; https://doaj.org/toc/0718-560X |
| DOI: | 10.3856/vol43-issue5-fulltext-9 |
| URL الوصول: | https://doaj.org/article/bb840d4e121948b39f63cff467fff9e1 |
| رقم الانضمام: | edsdoj.bb840d4e121948b39f63cff467fff9e1 |
| قاعدة البيانات: | Directory of Open Access Journals |
| تدمد: | 0718560X |
|---|---|
| DOI: | 10.3856/vol43-issue5-fulltext-9 |