Evaluation of the feeding habits of Macrobrachium brasiliense (Heller, 1862) in the Curral de Arame stream (Dourados/Mato Grosso Do Sul, Brazil)
| Autor: | Jelly Makoto Nakagaki, Madson Silveira de Melo |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
frequency of occurrence
food habits Animal science Algae Crustacea Arame palaemonidae lcsh:Zoology Organic matter lcsh:QL1-991 Carapace lcsh:Science lcsh:QH301-705.5 chemistry.chemical_classification biology Ecology crustacea biology.organism_classification Shrimp lcsh:Biology (General) chemistry Oligochaeta Macrobrachium brasiliense lcsh:Q Omnivore Palaemonidae stomach content |
| Zdroj: | Nauplius, Volume: 21, Issue: 1, Pages: 25-33, Published: JUN 2013 Nauplius, Vol 21, Iss 1, Pp 25-33 Nauplius v.21 n.1 2013 Nauplius Sociedade Brasileira de Carcinologia (SBCA) instacron:SBCA |
| ISSN: | 0104-6497 |
| DOI: | 10.1590/s0104-64972013000100004 |
| Popis: | Macrobrachium brasiliense is a cosmopolitan shrimp species found in the channel of large rivers, streams, lakes, igapós and upland igarapés and can present diversity in the use of food resources. This study aimed to evaluate the feeding habits according to sex, molt stage, seasonal and spatial variation, and size class. Organisms were collected every three months from May 2011 to March 2012 at three sampling sites in the Curral de Arame Stream, including the upstream, middle, and downstream sections. Animals were sampled with 50x50cm sieves (1 mm mesh size) on the margin, and with "D" dip nets 40 cm wide (500 µm mesh size) at the bottom. Of each animal we examined the sex, molt stage, carapace length, and stomach content. Data were analyzed through the frequency of occurrence and compared by a chi-square test. Four-hundred-thirty shrimps were collected, of which 26.05% male and 73.95% female; of the total males, 69.64% showed content in the stomach, and females, 72.96%. Among food items stood out: Non-identified Organic Matter (90%), Insects (89.68%), Sand (87.10%), Algae (49.03%), Oligochaeta (29.68%), Fungi (26.77%) and Plant fragment (14.52%). No significant difference was detected in the diet between males and females, but there was a seasonal difference related to the molt stage, and differences along the space and per size classes, and it was concluded that the species has omnivorous habits. |
| Databáze: | OpenAIRE |
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