Defining the reproductive period of freshwater fish species using the Gonadosomatic Index: a proposed protocol applied to ten species of the Patos Lagoon basin

Autor: Nelson Ferreira Fontoura, Gianfranco Ceni, Aloisio Sirangelo Braun, Camilla da Silva Marques

Publikováno v: Neotropical Ichthyology, Vol 16, Iss 2 (2018)

ABSTRACT This contribution records the reproductive periods of ten dominant freshwater fish species from the Patos Lagoon and Guaíba Lake (Astyanax fasciatus, Cyphocharax voga, Hoplias malabaricus, Oligosarcus jenynsii, Oligosarcus robustus, Hoplost

Externí odkaz: https://doaj.org/article/21c15f7791c14956a7f9672055c6fc56

Estimating size at first maturity (L50) from Gonadossomatic Index (GSI) data

Autor: Nelson Ferreira Fontoura, Paulo César Carvalho Milani, Aloisio Sirangelo Braun

Publikováno v: Neotropical Ichthyology, Volume: 7, Issue: 2, Pages: 217-222, Published: JUN 2009
Neotropical Ichthyology, Vol 7, Iss 2, Pp 217-222
Neotropical Ichthyology v.7 n.2 2009
Neotropical ichthyology
Sociedade Brasileira de Ictiologia (SBI)
instacron:SBI

Correct estimates of size at first maturity (L50) are useful for fish stock management and different methods have been proposed. In this study we propose the use of a modified logistic to estimate L50, including a variable asymptote (A). We also test

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a34acfa84ee89d3c3bfdfb49f5f04216
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200013&lng=en&tlng=en