Impact of the Sex Ratio in the Breeding Aspects of the Crayfish Cambarellus montezumae
| Autor: | Ana Nallely Ceron Ortiz, José Antonio León Escamilla, Marco Antonio Limon Mendoza, Miguel Angel Angeles Monroy |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Ecology
biology Hatching business.industry media_common.quotation_subject Fertility Aquatic Science Oceanography biology.organism_classification Crayfish Fecundity Crustacean Animal science Aquaculture Reproduction business Ecology Evolution Behavior and Systematics Sex ratio Water Science and Technology media_common |
| Zdroj: | Hidrobiológica. 29:53-62 |
| ISSN: | 2448-7333 0188-8897 |
| DOI: | 10.24275/uam/izt/dcbs/hidro/2019v29n2/ceron |
| Popis: | Background: The exploitation of aquaculture resources, such as the freshwather crayfish C. montezumae (Mexican endemic crustacean), is related with fertility of females due to the available number of postlarvae that can be cultivated. Goals: To evaluate the impact on reproductive aspects of the sex ratio C. montezumae in relation to obtained postlarvae. Methods: The impact of three sex ratio of males and females in the number of ovigerous females, fertility, fecundity, hatching time and the relation between these variables was determinate under laboratory conditions. Results: The analysis of variance shows that sex ratio 1:1 produced the highest number of ovigerous females (61) and a higher number of postlarvae (2451). When comparing the average fecundity (37 eggs per female) and the mean hatching percentage (97.96%), no significant differences between treatments were obtained. Females of first reproduction influenced the absence of linear relationships between size (weight and length) and reproductive aspects evaluated (fecundity and fertility). Conclusions: The sex ratio 1:1 is set as the optimum to get the highest number of postlarvae. The absence of linear relationship between size and studied variables provides the opportunity to study the influence of second breeding females to determine the technical conditions of higher postlarvae production in this specie. |
| Databáze: | OpenAIRE |
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