Age and growth of two Sharpnose Shark species in subtropical waters of Southwestern Atlantic
Data
2019-09-26
Autores
Corsso, Jéssica Thais 
Orientadores
Motta, Fabio dos Santos
Tipo
Dissertação de mestrado
Título da Revista
ISSN da Revista
Título de Volume
Resumo
Age and growth of the subtropical populations of the Brazilian and the Caribbean 198
sharpnose sharks (Rhizoprionodon lalandii and R. porosus) were determined combining direct 199
and indirect ageing methods, maximizing the use of available information. The growth 200
parameters Linf (mm) and k (year-1) using vertebrae ageing for R. lalandii were 661.9 and 1.14 201
for males and 751.7 and 0.59 for females, and for R. porosus were 1,035.7 and 0.40 for males 202
and sample were not available for female vertebrae analyses. The parameters of length-203
frequency analyses using ELEFAN for R. lalandii were 762 mm and 0.71 year-1 for males and 204
791 mm and 0.67 year-1 for females; and for R. porosus were 1,040 mm and 0.41 year-1 for 205
males and 1,165 mm and 0.31 year-1 for females. Growth during the first year of life of R. 206
lalandii was 80.3% and of R. porosus was 55% in relation to birth size. Both species presents 207
rapid growth, mainly in the first year of life. The growth estimates are even faster than those 208
reported in previous studies from tropical populations
Descrição
Citação
CORSSO, Jéssica Thais. Age and growth of two Sharpnose Shark species in subtropical waters of Southwestern Atlantic. 2019. 55 f. Dissertação (Mestrado em Biodiversidade e Ecologia Marinha e Costeira) - Instituto do Mar, Universidade Federal de São Paulo, Santos, 2019.