Ecological aspects of natural populations of Hyalella pampeana (Crustacea, Amphipoda, Hyalellidae) from the Natural Reserve Island of Martín García (Río de La Plata, Argentina)
Abstract: Freshwater amphipods of the genus Hyalella have a great importance in aquatic ecosystems due to their role in matter and energy cycling and its utilization as bioindicators of environmental health. The aim of this work was to analyze relevant population parameters of Hyalellapampeana, such...
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| Format: | Article |
| Language: | English |
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Academia Brasileira de Ciências
2019-04-01
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| Series: | Anais da Academia Brasileira de Ciências |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100620&lng=en&tlng=en |
| _version_ | 1818308334019674112 |
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| author | MARÍA FLORENCIA COLLA INÉS I. CÉSAR |
| author_facet | MARÍA FLORENCIA COLLA INÉS I. CÉSAR |
| author_sort | MARÍA FLORENCIA COLLA |
| collection | DOAJ |
| description | Abstract: Freshwater amphipods of the genus Hyalella have a great importance in aquatic ecosystems due to their role in matter and energy cycling and its utilization as bioindicators of environmental health. The aim of this work was to analyze relevant population parameters of Hyalellapampeana, such as population density and structure, individual body size, sex ratio, fecundity and recruitment, and to study the possible relation of these parameters to variations in environmental variables. Samples were taken monthly during a one-year period (2006) at three small ponds in the Natural Reserve Island of Martín García, Argentina. The inland aquatic environments showed distinctive physicochemical characteristics, mainly related to pH and conductivity values. Amphipod population density varied among sites and throughout the year, with population peaks during spring, positively correlating with pH values. The operational sex ratio of the total population was almost equal to 1 male: 1 female, displaying seasonal variation. Mean fecundity and mean size of ovigerous females were higher during winter and early spring months than in summer months. The presence of ovigerous females and juveniles in all months indicated that reproduction is continuous during the year for Hyalella, in its natural environment. |
| first_indexed | 2024-12-13T07:12:37Z |
| format | Article |
| id | doaj.art-4502a51f9b5f44c8b7f6ba2dd682aabf |
| institution | Directory Open Access Journal |
| issn | 1678-2690 |
| language | English |
| last_indexed | 2024-12-13T07:12:37Z |
| publishDate | 2019-04-01 |
| publisher | Academia Brasileira de Ciências |
| record_format | Article |
| series | Anais da Academia Brasileira de Ciências |
| spelling | doaj.art-4502a51f9b5f44c8b7f6ba2dd682aabf2022-12-21T23:55:37ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências1678-26902019-04-0191110.1590/0001-3765201920170928S0001-37652019000100620Ecological aspects of natural populations of Hyalella pampeana (Crustacea, Amphipoda, Hyalellidae) from the Natural Reserve Island of Martín García (Río de La Plata, Argentina)MARÍA FLORENCIA COLLAINÉS I. CÉSARAbstract: Freshwater amphipods of the genus Hyalella have a great importance in aquatic ecosystems due to their role in matter and energy cycling and its utilization as bioindicators of environmental health. The aim of this work was to analyze relevant population parameters of Hyalellapampeana, such as population density and structure, individual body size, sex ratio, fecundity and recruitment, and to study the possible relation of these parameters to variations in environmental variables. Samples were taken monthly during a one-year period (2006) at three small ponds in the Natural Reserve Island of Martín García, Argentina. The inland aquatic environments showed distinctive physicochemical characteristics, mainly related to pH and conductivity values. Amphipod population density varied among sites and throughout the year, with population peaks during spring, positively correlating with pH values. The operational sex ratio of the total population was almost equal to 1 male: 1 female, displaying seasonal variation. Mean fecundity and mean size of ovigerous females were higher during winter and early spring months than in summer months. The presence of ovigerous females and juveniles in all months indicated that reproduction is continuous during the year for Hyalella, in its natural environment.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100620&lng=en&tlng=enfreshwater amphipodabody sizefecunditysex ratio |
| spellingShingle | MARÍA FLORENCIA COLLA INÉS I. CÉSAR Ecological aspects of natural populations of Hyalella pampeana (Crustacea, Amphipoda, Hyalellidae) from the Natural Reserve Island of Martín García (Río de La Plata, Argentina) Anais da Academia Brasileira de Ciências freshwater amphipoda body size fecundity sex ratio |
| title | Ecological aspects of natural populations of Hyalella pampeana (Crustacea, Amphipoda, Hyalellidae) from the Natural Reserve Island of Martín García (Río de La Plata, Argentina) |
| title_full | Ecological aspects of natural populations of Hyalella pampeana (Crustacea, Amphipoda, Hyalellidae) from the Natural Reserve Island of Martín García (Río de La Plata, Argentina) |
| title_fullStr | Ecological aspects of natural populations of Hyalella pampeana (Crustacea, Amphipoda, Hyalellidae) from the Natural Reserve Island of Martín García (Río de La Plata, Argentina) |
| title_full_unstemmed | Ecological aspects of natural populations of Hyalella pampeana (Crustacea, Amphipoda, Hyalellidae) from the Natural Reserve Island of Martín García (Río de La Plata, Argentina) |
| title_short | Ecological aspects of natural populations of Hyalella pampeana (Crustacea, Amphipoda, Hyalellidae) from the Natural Reserve Island of Martín García (Río de La Plata, Argentina) |
| title_sort | ecological aspects of natural populations of hyalella pampeana crustacea amphipoda hyalellidae from the natural reserve island of martin garcia rio de la plata argentina |
| topic | freshwater amphipoda body size fecundity sex ratio |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100620&lng=en&tlng=en |
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