| Full text | |
| Author(s): |
Penido Paschoal, Lucas Rezende
[1, 2, 3]
;
Filgueira de Oliveira, Leo Jaime
[4]
;
Andrioli, Guilherme Casemiro
[4]
;
Zara, Fernando Jose
[4, 2, 5, 6]
Total Authors: 4
|
| Affiliation: | [1] Univ Estadual Minas Gerais, Passos, MG - Brazil
[2] Sao Paulo State Univ UNESP, Inst Biosci, Biol Sci Zool, Rio Claro - Brazil
[3] Fac Tecnol Nilo de Stefani FATEC, Jaboticabal - Brazil
[4] Sao Paulo State Univ UNESP, Ctr Aquicultura CAUNESP, Jaboticabal - Brazil
[5] Sao Paulo State Univ UNESP, UNESP CAUNESP, Sch Agr & Veterinarian Sci, Dept Biol, IML, Aquaculture Ctr, Jaboticabal - Brazil
[6] Sao Paulo State Univ UNESP, IEAMar UNESP, Jaboticabal - Brazil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | AQUACULTURE RESEARCH; v. 50, n. 12, p. 3589-3596, DEC 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
The gonadosomatic (GSI) and hepatosomatic (HSI) indexes are widely used for the evaluation of reproductive biology in crustaceans. However, the use of either wet or dry weight for estimating these indexes is not standardized in the literature. Here, we compare the GSI and HSI indexes based on wet and dry samples of females of Macrobrachium amazonicum from populations with different phenotypes (large and small-size prawns) as a model. In our analysis, for GSI, the application of wet weight tended to overestimate the values recorded in the initial (I-II) and intermediate (III) stages of ovarian development, and underestimate the results in the final (IV-V) stages when compared to the use of dry weight. This could be attributed to the reduction in cytoplasmic organelles and water content of the cytosol due to the increase in yolk and lipids in the oocytes throughout ovarian development. For HSI, no significant differences were detected between wet and dry samples. However, the dry HSI computed at all stages of development was overestimated when compared to the use of wet samples, and only the hepatopancreas of females at the final stage (V) showed a significant decrease in water content. Thus, our results indicate that M. amazonicum females maintain constant hepatopancreatic reserves throughout ovarian development. In this way, the use of dry weight is more adequate to estimate GSI and HSI in this species. (AU) | |
| FAPESP's process: | 10/50188-8 - Decapod crustaceans: multi-disciplinary characterization of the sea biodiversity of the State of São Paulo (taxonomy, spermiotaxonomy, molecular biology and population dynamics) |
| Grantee: | Fernando Luis Medina Mantelatto |
| Support Opportunities: | BIOTA-FAPESP Program - Thematic Grants |